Charles is a purchaser of a hydraulic pump company in the United States. He has done very well and occasionally inquires about the price with AAK HYDRAULIC VALVE. For the hydraulic check valves purchased some time ago, the production director found that 20% of the hydraulic check valves have parameters that do not meet the standard, so they must get new qualified ones to the workshop within 20 days, otherwise the delivery of customer order would be delayed. Charles asked the original manufacturer of the hydraulic check valve to complete the replacement within 2 weeks. The manufacturer is willing to replenish, but the production can be started only after 15 days, that is to say, it will take 30 days to replenish. Charles tried to find other suppliers of hydraulic check valves, and all replied that it could not be completed in such a short time. Charles realized that something was going to happen and began to look for a new hydraulic valve manufacturer, contacting factories one by one.

Charles thought that AAK had also participated in the quotation of this hydraulic check valve, and the samples provided also met the requirements, but it was not considered because the quotation of AAK was slightly higher than that of other hydraulic valve manufacturers by 7%. Charles sent us an e-mail to ask whether the quotation of hydraulic check valve offered 6 months ago can be maintained, and if we can finish an urgent order of 100 hydraulic check valves in 10-12 days. I felt that this should be an order for hydraulic check valve encountered with problem. Charles told us the truth. About 20% of the hydraulic check valves produced by the original factory were unqualified and rejected by their production director. Now he must replenish them as soon as possible.

General hydraulic valve manufacturers are unwilling to make such aftercare orders, but AAK HYDRAULIC VALVE don't think so, because AAK, as a production factory, has the same goal as the importer, that is to serve users well, so AAK is more willing to help customers and solve complaints from users together.

Fortunately, the corresponding materials are in stock. Combined with the 24-hour production line, our production director conservatively estimates that it can be completed in 12 days. Charles asked us to start blanking now and the hydraulic check valve order will be issued tomorrow. After 10 days, 100 hydraulic check valves were successfully finished. Charles was very happy and quickly air freighted these hydraulic check valves to the United States. Thanks to the God, 100 hydraulic check valves finally arrived at their workshop in 20 days.

Charles informed us by email that their engineers installed, debugged and tested AAK hydraulic check valves, which were all normal. The 7% higher price was also agreed by his boss. The boss was very amazed that AAK can deliver so quickly and the quality was better than that of the original manufacturer.

AAK uses 1144 steel imported from the United States for this hydraulic check valve, which can be directly quenched. After heating to 850 ℃, it can be insulated for more than 10 hour, up to 58HRC. Usually, the ordinary factory can not control the heat treatment of this steel. The quenched 1144 steel is easy to cut, with fast cutting speed and little damage to the tool. Compared with 45 steel adopted by the original manufacturer, the production efficiency can be improved by 30%, and the strength and hardness are also stronger than 45 steel, but the cost is some high, and it is not easy to heat treat. Most hydraulic valve manufacturers dare not use this material, so most hydraulic valve manufacturers can not guarantee to complete the urgent order of this hydraulic check valve in 2 weeks.

AAK hydraulic check valve, although 7% more expensive, not only has fast delivery time, but also satisfy you on the quality. You are welcome to have a small try!

For hydraulic valves in oily medium, oil selection is very important. Russian customers accepted AAK's suggestion on the selection of hydraulic oil, which successfully restored the trust of their customers.

The quality of oil will also affect the service life of products. At present, many users in the market use HL32 hydraulic oil. It has the lubrication of circulation system and is also cheap. At the same time, it can prolong the oil change cycle. Compared with machine oil, it can save 1 / 3-1 / 2 of lubricating oil, so it has become the first choice of many users.

When the lubrication effect of hydraulic oil is poor, impurities are easily entered, which leads to severe wear of valve core. At the same time, the air release value, anti bubble property and poor water separation performance easily lead to rust and scrap of products, and shorten the service life of the products. Many users often ignore the oil product problem, and the manufacturers of hydraulic valves do not give the guidance on the use of hydraulic oil. This will lead to the quality of hydraulic valve, and also the service life.

Some time ago, in a chat with a Russian client, why did the same batch of AAK hydraulic valves have different service life? Because the client promised the users that the quality guarantee period of AAK hydraulic valve is 1-2 years, but now only about 8 months, some users complained about some problems.

I am very surprised. After more in-depth communication, I learned that the "cause" is that the medium has affected the service life of the hydraulic valve. At present, the oily medium used by the users who complained is HL32 hydraulic oil. I analyzed the instability of No. 32 hydraulic oil with the client. Due to its poor air release value, anti foaming property and water separation performance, it is easy to cause rust and scrap of products. This oil quality is only suitable for lubrication of bearing boxes and low-pressure circulation systems of various machine tools without special requirements for oil quality, and is not suitable for hydraulic valve system.

After listening to my analysis, the Russian client said that no supplier had ever fed back the requirements of hydraulic oil, and asked me how to make the guidance for the users. We feedback that these problems can be solved as long as HM46 hydraulic oil can be used, it can quickly separate the water mixed in the oil, has excellent oxidation stability and hydrolysis stability, and can resist the influence of air, moisture, high temperature, high pressure and other factors.

After half a year, the Russian customer did not mention this problem. A phone call happened one day, and I knew that after listening to my analysis that day, he immediately suggested that the user try to change the hydraulic oil to improve the service life of the product. This call showed that the effect was obvious and the trust of the user was successfully restored. He appreciated that we found an effective solution for the problem.

AAK Hydraulic valve is not only a comprehensive technology, but also with good after-sales supporting. Don't wait, contact AAK Industry Co., Ltd. if you have any questions.

The gap error between the hydraulic cartridge valve and the valve block produced by AAK was reduced to 2μm-3μm, and the sealing oil effect surpassed 95% of its peers. The order volume of American customers increased from 30% to 50%, and there was no quality complaint.

Because of being used to the domestic market, most manufacturers lack a certain awareness of the precision of the products, especially the gap between the hydraulic cartridge valve and the valve block. Once the gap is too large and oil leakage is unavoidable. The 95% of the hydraulic valve manufacturers in the conventional market can only achieve 8μM-10μm, and the sealing effect is just general. After six months of use, the hydraulic system will appear slight Oil leakage phenomenon, this is why many hydraulic cartridge valve use shelf life generally stay in 6 months.

Before March, Lisa, an American customer, purchased a batch of hydraulic valves of different models from our company and another factory at the same time. A few days ago, she sent an email to inform another factory that the hydraulic valves produced by another factory had slight oil leakage, which led to the failure of pressure and flow regulation. She asked us about the last shipment, if there will be similar problems. We don't think so. I told him that in order to save cost, 95% of the products produced by manufacturers can only control the fit gap error between 8μm and 10μm, which leads to the inconsistency of the product's normal use and shelf life. Lisa was skeptical and tested 10 samples from another factory, and the gap error was mostly about 8μM-10μm. At the same time, she also tested and compared the parameters of our samples, and the results showed that the fit gap of our products was 2-3μM. Seeing such big difference and in order to ensure the service life of the products, Lisa increased the order quantity from 30% to 50%. So far, there has been no quality complaint.

Under the premise of normal use, the shelf life of AAK hydraulic valves can generally be controlled for 1-2 years, they are mainly equipped with skilled production masters and advanced production equipment. At the same time, each product is debugged by the R & D team before production, and large-scale production is arranged only after the parameters are tested to be qualified. This is why the gap between AAK hydraulic valve and valve block can be controlled within 2-3μM, and also what most peers lack.

For high quality sealing effect, AAK can save you a lot of costs, don't hesitate, welcome to try!

Fernado is a purchaser from a Spain company, responsible for its company's hydraulic valve procurement project in China. This time, he suffered a big setback. For a batch of hydraulic valves using domestic 1214 steel as valve core, more than 60% of the products have oil leakage after being used for about 6 times. In the last week, 72 complaint calls have been received, and even more direct requests for return of goods have been made. The headquarter requested him to give solutions within half a month. Fernado, however, was confused and at a loss.

In order to find out the cause of the oil leakage, Fernado immediately transferred nearly 50 products from the warehouse for parameter testing, and finally found that there was indeed a widespread oil leakage phenomenon. He learned that although 1214 steel made in China is an easy cutting material, due to the brittleness of the material, the slight deformation caused by careless heat treatment to the valve core, can not be found and picked out. In order to save costs, many manufacturers do not do any inspection and directly assemble and use, which leads to the problems in the use of the products.

Occasionally, he saw our company's information on the Internet, and contacted us with the mentality of trying. After listening to his intention, we picked some products by using 40Cr material as the valve core, and conducted pressure test for many times on the spot. There was no oil leakage phenomenon at all. Fernado's face is full of heavy relief when he saw the parameter list. Fernado took a video on the spot, wrote a comparison report, and sent an email to the headquarters. On the third day, we received a small trial order from him, mainly to replace the stocks with problems.

All the hydraulic valves produced by AAK use 40Cr as the main raw material of valve core, which is pressure resistant, wear-resistant and not easy to deform. At the same time, after heat treatment, the surface toughness is better and the fatigue resistance is stronger. Although the material price and cost is higher than 1214 steel, it can completely solve the problem of oil leakage, this is what many manufacturers lack.

After the oil spill problem was solved, Fernado gained the absolute trust of the headquarters, so he was promoted to be the main procurement leader in China. At the same time, the volume he purchased from our company has also increased year by year. We have cooperated with him for three years, and the average annual purchase is stable at about 1.2 million euro.

AAK hydraulic valve uses 40Cr steel as the raw material for the valve core, which never leak, this is absolutely different from other manufacturers.

Different from 90% of the hydraulic valve manufacturers, AAK hydraulic valve sleeve is made of 40Cr material, which will not cause stuck phenomenon. It saves David's hydraulic valve market in Italy in time, and our company has gradually become his main supplier.

The selection of valve sleeve material is directly related to the performance of hydraulic valve. The domestic 1214 steel is easy to cut and has high output. At the same time, the loss of machining blade is relatively small. At present, in order to save cost, the vast majority of peers use domestic 1214 steel as valve sleeve, which often ignores the potential problems, such as brittleness and easy deformation during heat treatment. If the valve sleeve is deformed, it will cause the spring base to jam and malfunction in the process of tightening and loosening, and affect the pressure and flow control. Currently, the valves produced by vast majority of manufacturers have these hidden dangers.

David from Italy is mainly responsible for the purchasing of hydraulic valves in East China in the past two years. Last year, he purchased a batch of pilot hydraulic valves from our hydraulic peers. There was no problem in the production and assembly, even after the test on the pressure test bench. The market sales data of this order was also very optimistic. David's team was planning to re-peat the order and double the qty. However, at the same time, he received complaints from 30% of customers. The problem is all the same that the spring base is stuck and after being adjusted for two or three times, it becomes loose, and the control of pressure and flow almost fails.

He accidentally saw our company website on the Internet. After simple email communication, we suggested that he come to our company for onsite comparison. David came to our company with samples the next day. We could not see any problems from the appearance of these products, so we immediately tested the samples with more precise parameters. After tightening and loosening for 2-3 cycles, there was a phenomenon of stuck and adjusting failure. After checking the test parameters, the original problem was that there was slight deformation on the screw thread inside the valve sleeve, a discrepancy of only a few μm, which cannot be seen by naked eye, but can lead to the phenomenon of stuck in the process of cooperating with spring base. David was surprised that we were so quick to detect the problem and asked how we could avoid these risks.

We compared our valve sleeve material data with his sample material data one by one, and he understood the mystery. In order to avoid another quality problem and lose the Italian market, he requested us to rush a new batch of orders for him to replace the current defective products. With the stable quality in recent years, David's team has been recognized by new and old customers, and our company has gradually become his leading supplier.

All the hydraulic valve sleeve produced by AAK uses 40Cr. The main reason is that after heat treatment at appropriate temperature, 40Cr achieves excellent comprehensive mechanical properties in terms of toughness, plasticity and wear resistance. Especially for surface hardening treatment such as high frequency quenching and tempering of steel, AAK has its own proprietary technology.

If you still have concerns about AAK hydraulic valve, it is normal, but do not miss us, you can try a small order.

The hydraulic valves produced by AAK use nitrile rubber sealing ring, which has better seal performance than most of the peers. Even though the market competition is fierce, there is no old customer transferring orders. Only Tom, an American customer who has cooperated for six years, transferred orders to expand the base of suppliers. As a result, oil leakage occurred and he came back to AAK for help and got the problem solved. Now he seems afraid to transfer orders again.

For the selection of hydraulic valve seal ring, the vast majority of manufacturers use silica gel seal ring, this material has good tensile performance, high temperature resistance, no deformation, and good sealing water resistance, but the biggest problem is not resistant to oil and acid. Because of the strong tensile strength of the silicone seal ring, the assembly is convenient and the assembly efficiency of the whole hydraulic valve is very high. In order to improve the assembly efficiency and save the cost, most manufacturers use silicone sealing ring. However, when such a hydraulic valve is used in an oily hydraulic environment, especially in acidic materials, there will be 100% oil leakage when used with valve block.

Tom, an American customer who has been working with us for six years, is very busy recently because of the oil leakage problem of an order. Sometimes even at 3 am in the morning, he is communicating with the person in charge of our technical department to seek solutions. A year ago, he wanted to develop a new supplier and transferred the order without our knowledge. Now he needs our help when there is a problem. Through the video, we only know the problem of oil leakage, cannot see the product, also do not know the reason, so we asked him to send samples, then we can do specific parameter analysis.

A week later, we tested immediately after receiving the samples. The results showed that the internal circulation was ok, but it is difficult to imagine that the problem would appear on the sealing ring. The reason is that this factory used silica gel sealing ring. We told Tom the problem and advised that he only needed to replace the silicone seal ring with our nitrile rubber seal ring, and his problem was solved. Tom is surprised and speechless. Now the whole shipment is unsalable. After this loss, he came back to us to solve the problem. Now he is very grateful to us. He found the source of the problem and does not transfer our order to other suppliers any more.

AAK hydraulic valve is mainly used with NBR sealing ring, the sealing performance overwhelm the majority of peers, this material is not only high temperature resistance, good adhesion, corrosion resistance, what's more important, it is oil resistant, acid proof, waterproof, anti-aging, it is the first choice for sealing the hydraulic system. At the same time, we can also according to the customer's requirements for different use conditions of the hydraulic valve, specially match the sealing ring of different media to reach the standard of zero oil leakage. This is why many new and old customers choose to cooperate with us, and do not transfer the orders easily.

Details determine success or failure. AAK always pays attention to details, so it can be invincible.

The high-pressure throttle hydraulic valve produced by AAK, the service life can be longer than 90% more of its peers, the key is that we have our own quenching and tempering heat treatment process, through the quenching with different tempering temperature, can raise the strength and toughness of hydraulic valve, as well as the fatigue strength greatly, to avoid deformation and abrasion happened in the process of hydraulic valve being used in the long-term. Currently, less than 10% of the industry can match the service life of AAK hydraulic valves.

In order to save costs, 70% of manufacturers do not do any heat treatment to the hydraulic parts materials, some of them do heat treatment, but outside of the factory, and 20% of the factories do heat treatment at a different place each time, due to these reasons, the quality can not be guaranteed, let alone the stability. Due to the existence of these common problems in the industry, after being used for a period of time, the hydraulic valve will expose lots of problems, such as deformation, abrasion and so on. Once the deformation of the hydraulic valve, the valve blocking will be more serious, and the abrasion will lead to increased leakage, which greatly shorten the service life of the hydraulic valve.

Last month, Jone, the purchasing director of the American customer in China, came to me and complained during the chat that since 2019, for unknown reason, his customers have been complaining one after another, and the problems are surprisingly consistent, the hydraulic valve has been deformed and worn out quickly in less than three months after being used.

I told him directly that the heat treatment of the material was the problem. 70% of manufacturers do not do any heat treatment to the hydraulic parts materials. Even if the heat treatment is done, 20% of the factory's heat treatment is done outside at different places each time. Thus, the quality cannot be guaranteed, let alone the stability. I sent him several samples, and told him that the hardness of our material must be higher than what he purchased, which can reach 40-45HRC or higher. It is mainly produced depending on the customer's use scenario, to ensure the service life of the hydraulic valve. Jone seems to understand the seriousness of the problem and reports directly to the boss about the current state of the industry in China. Just this month, we got their trial order.

To do well in heat treatment, AAK controls a heat treatment factory which has been in the industry for over 10 years. Due to the temperature sensitivity of the quenching and tempering heat treatment of the hydraulic valve material, if the temperature is too low, the hardness is not enough and the hydraulic valve will be easy to deformation, otherwise it will lead to fracture. Only our own heat treatment process, under the operation of experienced masters, can accurately grasp the appropriate temperature. AAK can also select the corresponding heat treatment process and set the temperature range according to the different working conditions of the hydraulic valve, to ensure the service life of the hydraulic valve.

With service life longer than over 90% peers, AAK hydraulic valve is waiting for your trial order.

AAK hydraulic valve has already used Korean harp steel wire as the pressure spring of hydraulic valve, while only a few factories in the same industry are using it. Russian customers came to our factory to make customized samples and then return home. After half a year of sample comparison, AAK hydraulic valve has been able to overcome domestic and foreign competitors, so far it has bring us a cumulative order of millions of dollars.

It is a common problem that the pressure of hydraulic valve cannot be adjusted after using for a period of time. The quality of internal spring of hydraulic valve is directly related to the strength control of hydraulic system. Once there is a problem, the whole hydraulic system will be paralyzed immediately, so the quality of spring is vital.

In order to save cost, 80% of the manufacturers use the carbon steel which is cheap and widely used. With the increase of carbon content, although the hardness of the material will increase, the plasticity and toughness of the material will decrease, and also lead to the weakening of tensile strength and stability. After repeated use, the resilience of spring will also be weakened, and then the adjustment of hydraulic valve will have problems.

In 2018, a Russian customer Alex purchased hydraulic valves from China, and there was a problem with automatic pressure regulation. He received many complaints from his customers. Therefore, it is urgent to find a new supplier to replace it. After staying in China for half a month, he found AAK hydraulic valve and visited our whole production workshop. After that, he took out a draft and paid for several customized samples.

After returning home with the samples, we couldn't get in touch with him, either by email or call. We thought he had left the industry. After half a year, we suddenly received an email of his hydraulic valve order, thinking that he had made a mistake and called him in the afternoon. During the conversation, we learned that he asked to make proofs not only from our company, but also tested all samples from every factory in the past six months, including each component and the cycle test of the entire hydraulic system. Finally, besides our company, another company also met his requirements, but their spring tension test parameters were lower than ours. Therefore, he chose AAK hydraulic valve without hesitation, and we have received more than total 1 million US dollars from him since 2018.

AAK hydraulic valve has been using the piano steel wire compression spring imported from Korea. The material has high strength, good elasticity, fatigue resistance, creep resistance and toughness. The surface is smooth and clean, and has strong anti rust ability. At the same time, it has the specified tensile strength and torsion performance, and the surface will not have cracks, folds, scabs, cracks and corrosion.

AAK hydraulic valve is not just worth you to buy, but in China you can hardly find a few, comparable with us. It's not that we're proud, we're honest, just tell the truth.

https://aakindustry.com/article/aak-hydraulic-valve-adopts-imported-spring-russian-customer-orders-millions-of-dollars-after-comparing-with-many-other-companies-i00007i1.html

The hydraulic valves that AAK produced have zero leakage because each valve has been tested correctly on the test bench before it is packed into the box. Due to the lack of pressure test table, 90% of the peers directly packed and shipped without pressure test, thus causing many problems. AAK hydraulic valve has entered the industry top 10 ranks.

90% of small and medium-sized hydraulic valve factories are either not equipped with pressure test table, or the pressure test table is just sleeping there as a device. The testing process of the pressure test table is really quite complicated. After the pressure test, the product needs to be disassembled, cleaned and reassembled, which requires a large amount of technical work. To save money, most factories abandon the process without testing it. Thus, with precision, the hydraulic valve can also appear leakage, some hydraulic valve even can not be assembled up, these phenomena are common in the country.

The pressure test table equipped by our company is not only a complete set of parameters, but also handled by a professional test master with 7 years of experience. The test of each product should be repeated at least 3 times, strictly in accordance with the specified parameters to ensure the sensitivity and zero leakage. AAK quality control is more QC than the customer's QC.

Last year, a customer from Russia has been purchasing hydraulic valves in Guangdong, but the supplier has been changing, because about 20% of the hydraulic valves have oil leakage and poor sensitivity. At the beginning, when he came to our factory with samples, he could not find any problems from the appearance. In order to find problems from the production process, we directly took him to the workshop for a visit. Finally, we found that the pressure test table was not equipped with all their suppliers.

We told him that each of AAK's hydraulic components had to go through a test bench, and that 90 percent of the peers couldn't or wouldn't do it. At the end of his visit, we processed several components of the same type for him to bring back to test. Less than two months after he returned, he gave us a trial order, and the result was certainly satisfying. Until now, there have been regular reorders every two months from him.

Using our zero leakage hydraulic valve, you can rest assured!

https://aakindustry.com/article/aak-hydraulic-valve-has-zero-leakage-and-russian-customers-order-back-every-2-months-i00004i1.html

For two years, by re-mading the samples for four times and changed the materials for three times, AAK samples successfully passed the parameter tests, stand out from many domestic hydraulic valve suppliers, and received a large order for the cartridge valves from the agent of HydraForce, which made us the top supplier of HydraForce in China.

At present, domestic hydraulic valve industry appears a very common phenomenon of "selling the facade", what is "selling the facade"? It means that the customer give orders to big enterprise, then the big enterprise give nearly 80% of the components to small enterprises for processing because of their low cost by using domestic raw materials, thus the differences in processing techniques is ignored and resulted in uneven quality, then many problems came out: valve blocking, oil leakage, abrasion and so on, it seriously influenced the product performance.

The Cartridge hydraulic valve of Hydraforce were copied in China several decades ago, but due to the limitations of testing levels and precision of lathes, few factories were able to make accurate copies. In June 2015, the manager of a HydraForce agent got in contact with us, intending to include us in the list of their suppliers and ask us to develop and imitate one of the HydraForce cartridge valves. With great trepidation, all our company technicians started to work on this project. Within two years, our company continually imported the Germany machines with higher precision, at the same time, replaced regular machines with test tables with more comprehensive test parameters. By re-mading the samples for four times and changed the materials for three times, after two years, AAK samples successfully passed the parameter tests and meet customer requirements, finally reached cooperation with HydraForce agent and became the top supplier of HydraForce in China for the cartridge hydraulic valves.

Since its establishment in 2012, AAK has always put technological innovation, high-quality raw materials and advanced equipment in the first place. Especially using 2 imported CNC lathes, plus more than 10 domestic CNC lathes, we reduced the time cost of frequent line change, and the delivery time is 40% faster than the peers. The 90% of the peers do not have this production configuration.

The HydraForce chose AAK as the partner in the end for no other reason than that we could meet the parameter requirements that other suppliers could not meet. We are willing to do what other people do not want to do, and we also try harder to do what other people cannot do.

With the ability to produce order for HydraForce, AAK's technology should give you enough confidence!

https://aakindustry.com/article/four-proofing-and-three-material-changes-were-made-aak-was-awarded-a-big-order-of-cartridge-valves-by-hydraforce-finally-i00006i1.html

The high pressure throttle hydraulic valve produced by AAK, the quality is higher than 90% of the peers, and help a foreign trade company in Guangdong to recover a major foreign trade customer. The key is that AAK adopts the high-precision processing equipment imported from Switzerland, which is owned by less than 10% of our peers.

In the current hydraulic valve market, more than 90% of the factories use CNC lathe to produce hydraulic valve. The hydraulic valve made by CNC lathe is prone to some hidden quality defects, such as assembling discrepancy, spool deviation from the central axis and so on. What's worse, it's not easy to find out, until the pipeline leaks, it's even not easy to judge whether there is a valve problem.

Li, manager of a foreign trade company in Guangdong Province, has received complaints from customers about several batches of hydraulic valves, which has caused them a lot of trouble. They are ready to give up this product line. He met me at an exhibition in Shanghai, and I took a careful look at their samples. The main body line is biased, and the valve core deviates from the central axis, which are almost the hidden problems in the industry. I told them to give some of my samples to his customers, try the quality of AAK hydraulic valve, and compare the quality with the domestic peers.

Three months later, manager Li called me and said to confirm an order of US$100,000. After returning from Shanghai exhibition, manager Li sent the samples of AAK hydraulic valves to overseas customers. As soon as the customers tested, they were very satisfied with the quality of these samples. They not only had good surface gloss and high precision, but also had strong sealing performance. Manager Li was very grateful to me for helping him solve this problem and keeping his big customer. Now we have a cooperation with Mr. Li's company of $1.2 million a year.

In order to achieve zero leakage of AAK hydraulic valve, our company has imported the Swiss machine tool with the highest precision to make up for the weak point of CNC lathe. At present, less than 10% of the peers have this equipment. It can replace seven groups of accessories randomly. The precision of high pressure throttle hydraulic valve produced by Swiss equipment is indeed high, which is at least 20% higher than that of domestic conventional CNC lathe.

With quality more than 90% peers for hydraulic valve, AAK products quality can be guaranteed. Waiting for your call for a conversation and cooperation!

https://aakindustry.com/article/aak-hydraulic-valve-quality-higher-than-90-of-the-peers-successfully-salvage-the-clients-foreign-trade-customers-i00008i1.html

AAK hydraulic valve for each part of the steel selection is extremely demanding, which beyond customer's imagination. Only in this point, we've run over most of our peers.

In the face of increasingly fierce competition in the hydraulic valve market, the simplest way to break through is to cut corners on materials. Many hydraulic valve peers use crooked ideas on raw materials, such as using limited 45 steel, which is soft and easy to wear. Even after heat treatment, the hardness can not meet the parameter requirements. Therefore, it is only applicable to the parts with light stress and less wear points, but many manufacturers are in the opposite direction, leading to serious uneven quality on the market.

Some manufacturers use 45 steel in spring seat, valve sleeve, and even more in valve core. Some time ago, Mr. Liu, from a foreign trade company in Shenzhen, came to us with a sample of relief valve. Through our inspection, we found that the inner hole of the product was worn and deformed seriously, not to mention the valve core. Moreover, he told us that 90% of the products from this batch were of this kind.

The price quoted by the original manufacturer is even lower than the cost of the product. Due to only comparing the prices, the foreign trade company ignored the quality of the products. The original tips of quality comparison among the three manufacturers has already changed into the price comparison. This factory uses 45 steel, the hardness can not meet the requirements, although the price is cheap, but the wear and tear of the products will certainly shorten the service life. We took out similar products for comparison. We could see the difference only from the appearance. Mr. Liu also made a careful comparison and material inspection and analysis, and finally understood the tricks. He said on the spot that we would be his first choice for the inquiry of hydraulic valves in the future.

As an old Chinese saying goes, in addition to skilled foundry masters, excellent raw materials are also the foundation of excellent quality sword casting, both are indispensable. Coincidentally, hydraulic valve is also the same, especially for steel selection. AAK is very strict in the selection of steel. We use 40Cr steel most. After heat treatment at appropriate temperature, it achieves excellent comprehensive mechanical properties in terms of toughness, plasticity and wear resistance, and enhances the fatigue resistance and hardenability of the products. Especially for the surface hardening treatment such as high frequency quenching and tempering, AAK has its own proprietary technology.

Is there any question about the quality of AAK hydraulic valve? If yes, it's normal. Then the comparison of product test is needed, there is no value without comparison, we especially welcome customers to make comparison.

https://aakindustry.com/article/aak-hydraulic-valve-on-the-selection-of-steel-is-extremely-harsh-saving-one-after-another-foreign-trade-customers-i00011i1.html

Although AAK hydraulic valve factory is equipped with high-precision imported CNC lathes and a lot of small-scale processing equipment, the output is already 40% higher than that of its peers, it still has the correct labor attitude to ensure the quality and delivery time, a California customer no longer want to find a second supplier after working with AAK.

When it comes to production efficiency, because domestic factories are used to domestic sales, they are not serious about delivery time. The production is slow, and the workers are off duty. If the customer is in a hurry, nearly 90% of the manufacturers will choose to outsource processing. However, due to the uncertain factors of Midway transportation and the quality problems caused by different factories, the quality level will inevitably be uneven, and it is impossible to guarantee that the delivery time of customers can be met.

In 2019, an old American customer introduced James to AAK, a California customer, who is the purchaser for hydraulic cartridge valves. In previous years, he purchased all hydraulic valves in the United States. Only because of the rise of China's hydraulic market in recent years, he chose to switch to the Chinese market. During the conversation with James, we knew that due to the limitation of machines and slow production efficiency of the original supplier, the delivery of a special order was delayed, he lost a large customer, so he decided to change the supplier.

He noted that we are equipped with a number of high-precision imported CNC lathes and a lot of small-scale processing equipment. Moreover, the factory operates 24 hours a day, and the employees work in shifts. This ensures that the production line is manned all 24 hours, and the output can be 40% higher than that of the peers. At the same time, it can guarantee the quality of hydraulic valves and try to advance the delivery time as far as possible. With the mindset of trying, James placed an order of 20,000 US dollars. Due to the first cooperation, James deliberately delayed the lead time of one month to two months.

During the production process, he always follow up the production progress through email and video, for fear that we will delay the shipping time like the last supplier. After 25 days, the goods were fully completed and 35 days ahead of schedule under the premise of ensuring quality. James was awed by our production efficiency. After this trial, he never considered looking for a second supplier.

AAK hydraulic valve factory not only has high-precision imported CNC lathe, but also can achieve 24-hour normal operation and reduce the time cost of frequent line change. The output is 40% higher than that of peers. At present, 90% of the manufacturers do not have the equipment of this scale.

Guaranteed quality, quantity and delivery! Purchasing AAK hydraulic valve with ease and rest assured!

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Jone is the purchasing director of an American customer in China. He often communicates with me about some technical problems. However, there has been no news in recent six months. Until the beginning of June this year, he informed the status of the their hydraulic valves by email. Since 2019, for unknown reason, his customers have complained about the quality of the hydraulic valves they sell. The problem is basically the same: after being used for around 3-5 months, the hydraulic valves will appear deformation, at the same time, the wear is very fast. Jone has been working with their after-sales department to appease customers, and has been busy.

Since we didn't see the sample, we couldn't give an accurate opinion. The next day, Jone arranged for the warehouse to send 10 samples randomly to us for inspection. After receiving the samples, I told him that the main problem was the heat treatment of the material, which had nothing to do with other things. At present, many manufacturers do not do any heat treatment for the hydraulic parts materials on hand. Even if the heat treatment is done, they will change the working place after a shot. Thus, the quality can not be guaranteed, not to say the stability of the products. This is the reason why the probability of wear and leakage is increased and the service life is shortened. In order to take care of the customers' mood, Jone promised customers to exchange goods for free. He urgently placed an order for 500 hydraulic valves, and asked us to complete the production in 3 weeks and ship them by air. We finished the production in half a month and delivered the goods successfully.

AAK hydraulic valve production has its own proprietary quenching and tempering heat treatment technology, and has held a heat treatment factory for ten years. The quenching and tempering heat treatment of hydraulic valve material is sensitive to temperature. If the temperature is too low, the hardness is not enough, and it is easy to deform, otherwise, it will lead to fracture. Only our proprietary heat treatment technology can accurately grasp the appropriate temperature under the operation of experienced masters. AAK can also select the corresponding heat treatment process and determine the temperature range according to the different service conditions of the hydraulic valve to ensure the service life of the hydraulic valve.

At present, 70% of the manufacturers do not do any heat treatment for the hydraulic parts materials, and some has the heat treatment processed outside, and 20% of the factories changed the working place for heat treatment every time, so the quality cannot be guaranteed and not to mention the stability. These are the common problems in the industry.

Once our hydraulic valves are received, Jone immediately replaced the valves for his customers. Three months later, his customers bought the hydraulic valve again and asked for the same quality. Jone placed the re-orders with us again, and the value of the goods reached 30,000 US dollars. He told me that since the use of AAK hydraulic valves, it was once well received, never received customer complaints, and the sales volume increased by 30% over the same period. Since the use of AAK hydraulic valves, the attitude of the headquarters to him has also changed greatly, and he was praised at the monthly summary meeting.

The quality of AAK hydraulic valve after heat treatment is guaranteed!

Last year, Pushkin, a Russian hydraulic valve buyer, always had the problem of automatic pressure regulation failure on the hydraulic valves he purchased from Guangdong, China, and received many complaints from customers. However, the problem could not be solved 100% by the original supplier. That's really upsetting Pushkin. If not deal with it properly, he will not only lose the job, but the company also has the risk to lose all customers.

For this type of situation, it is most likely the problem of the spring of the hydraulic valve, because for the hydraulic valves with spring by using carbon steel, after repeated use, the resilience of the spring will gradually weaken, resulting in the hydraulic valve pressure and flow regulation failure. The nature of carbon steel is with high carbon content and high hardness, but its plasticity and toughness will be reduced, at the same time, the tensile strength will be weakened, resulting in poor stability, which will affect the adjustment of hydraulic valve. As the hydraulic valve is always in operation, once the spring has a problem, the whole hydraulic system will be paralyzed. The carbon steel is currently the cheapest one and also easy to purchase. In order to save cost and facilitate production, at present, 90% of the manufacturers take carbon steel as the first choice for the spring material, which is already a common phenomenon in the industry.

In order to keep the customers, Pushkin is in urgent need of looking for new suppliers. During this half month in Zhejiang Province, we were introduced to him by friends. After visiting our whole workshop, he took out a draft and asked us to process several samples for him at his cost. Three months later, we received some information from him and also an order for hydraulic valves. At the beginning, he not only asked our company to proofing. In the past three months, he mainly tested the samples of each company, every component and the entire hydraulic system. Finally, besides our company, there was also another company that met his requirements. However, there is a little gap on the internal spring tension test parameters for the hydraulic valves made by our company and another factory. Therefore, he did not hesitate to place the order with AAK.

AAK hydraulic valve has always used the piano steel wire compression spring imported from South Korea. This material has the characteristics of high strength, good elasticity, fatigue resistance, creep resistance and toughness, smooth and clean surface and strong anti rust ability. At the same time, it has the specified tensile strength and torsion performance, and the surface is not allowed to have cracks, folds, scabs, cracks and corrosion etc.

Since last year, Pushkin has purchased hydraulic valves with imported piano steel wire spring from our company for over 530,000 US dollars. Since the use of AAK hydraulic valves, Pushkin has stabilized its old customers without worrying about customers' complaints and returns. Meanwhile, the market reputation is getting better and better. His frequency of returning home and abroad has also decreased, and he has spent more time in Russia.

AAK hydraulic valves, buy at ease, more ease of use!

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Elaine, a buyer in Russia, did not expect that nearly 30% of the hydraulic valves had oil leakage and poor sensitivity during the inspection of the orders that she had always paid great attention to. Before production, she emphasized the importance of the quality again and again, but there were still problems later. The supplier didn't have the equipment of pressure test bench, so they packed and shipped directly after production, then many problems came out. Fortunately, problems are found in the inspection process, which can avoid the loss later, but the delivery time is approaching. At present, she is eager to find a new supplier, looking around, struggling.

The current situation of the industry is that 90% of the small and medium-sized hydraulic valve factories either do not have pressure test bench, or use the test bench as decoration. Because the test process of the pressure test bench is really complicated, after the pressure testing, it needs to be disassembled, cleaned and reassembled, which needs a lot of technical work. In order to save cost, most factories give up this process without testing. In this way, no matter how high the accuracy of the hydraulic valve, there will be leakage, some hydraulic valves can not even be assembled, these phenomena are common in China.

Elaine saw our company's website on the Internet and sent an inquiry email. Three days later, accompanied by a Chinese, she found our company. After listening to her intention, we directly took her to the workshop to understand all the supporting production equipment and the whole process. Facing the current production scale, workflow, quality inspection and packaging, Elaine regretted choosing the wrong supplier. She asked if we could help with the delivery of 1500 hydraulic valves and asked us to deliver them within 60 days. I felt Elaine's anxiety, so through the consultation of the production department, we agreed. After 45 days of hard work, we successfully delivered the goods 15 days earlier than expected. After the previous lesson, Elaine paid great attention to the inspection. Half of the quantity was randomly selected for pressure test before delivery, and the result was that there was no oil leakage, then she was relieved to ship the goods.

Each hydraulic component of AAK has been tested by a pressure test bench with complete parameters, and a professional testing master with 7 years' experience is also equipped. Each product is tested at least three times. The quality of the product is strictly controlled according to the specified parameters to ensure sensitivity and zero leakage. AAK quality control is more QC than customer QC.

Half a year later, we received the first repeat order from the Russian customer Elaine. During the same period, new and old orders were continuously signed. Up to now, the volume can reach 1.5 million US dollars per year on average. Since cooperating with us, Elaine seldom cares about product quality. She has been promoted to the manager of purchasing department.

AAK hydraulic valve can guarantee both quality and quantity, what else do you worry about?

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Logan, an American customer, recently purchased a batch of hydraulic valves, but problems came out within the shelf life period. In previous years, he promised that it would have no problem within 1-2 year period. However, for unknown reason, nearly 60% of the users had problems after using them for about only 8 months. Sometimes, he even received more than 20 complaint calls in a day, which completely broke his habitual working pace and exhausted.

Logan sent us inquiries before, but has not cooperated with us yet. He sent us an email for a try and asked whether our company's hydraulic valves could avoid their customers' complaints. I suggested testing the product parameters randomly. If all parameters of the product are tested to be qualified, it's the best to learn about the user's environment. One week later, Logan sent me an email saying that the oil medium used by the current complaining customers is HL32 hydraulic oil, and the other environment is the same.

I told him that the quality of the oil will also affect the service life of the product. HL32 hydraulic oil has the lubrication of the circulation system, and its price is cheap. At the same time, it can extend the oil change cycle. Compared with machine oil, it can save 1/3-1/2 of lubricating oil, so it has become the first choice of many users. However, it also has a lot of instability due to air release value, anti foaming property and water separation poor performance, it is easy to get the product rusted and scrapped, it is only suitable for the lubrication to all kinds of machine tool bearing box, low pressure circulation system that do not have special requirement for oil quality, but not suitable for hydraulic valve system.

After listening to my analysis, Logan said that no supplier had ever mentioned the requirements for the hydraulic oil and asked me how to give the user a guide. We told him that as long as HM46 hydraulic oil can be used, the water mixed in the oil can be quickly separated, and it has excellent oxidation stability and hydrolysis stability. At the same time, it can resist air, moisture, high temperature, high pressure and other factors. The problems can be solved easily.

Three months later, we received an order of US$60,000 from Logan. This is an inquiry made by Logan half a year ago. On the call communication, Logan mentioned that after listening to my analysis last time, he immediately suggested the user try to change the hydraulic oil. After that, the service life of the product has been improved and the effect is obvious. At the same time, the trust of the user has been successfully restored. This order is mainly due to the recognition of our quality and technical authority, and also thank us for helping solve his customer's complaints even without business cooperation, taking this opportunity to have more cooperation with us.

AAK Hydraulic Valve not only has comprehensive technology, but also has a complete after-sales service. Don't wait! Contact AAK if you have any questions.

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Ron is one of the purchasers of an American hydraulic valve company in East China. A batch of hydraulic valves was released in June this year. The company's after-sales director told him that nearly 40% of consumers complained about the poor sealing and obvious oil leakage of the hydraulic valves. Ron was very surprised that he had not changed the factory, and the quality had not gone wrong in previous years. How could such a low-level error occur this time? He knew that if the problem could not be solved fundamentally, he would be fired.

In order to find out the reason, Ron visited many manufacturers and learned that most of the manufacturers used silicone sealing rings in order to save costs due to the rapid rise of materials recently. This material has good tensile properties, high temperature resistance, no deformation, and good sealing and waterproof properties, but the biggest problem is that it is not resistant to oil and acid. However, because of the strong tensile strength and convenient assembly of the silicone sealing ring, the assembly efficiency of the whole hydraulic valve is very high. In order to save the cost, many manufacturers take the silicone sealing ring as the first choice.

When Ron realized that the factory had secretly changed the materials, he was extremely disappointed and decided to replace the old factory with a new one. Ron saw our website on the Internet and found that there were nitrile rubber sealing rings in the introduction of each product, which was different from other manufacturers. He was curious and sent us an email asking why our sealing ring is different from most factories. We suggested that he buy more than 10 samples, test the parameters himself first to approve the quality, and send them to the U.S. headquarters. Ron was pleased that the headquarters was very satisfied with the quality of the samples and immediately provided them to customers for trial use. A week later, the headquarters received positive feedback from users, which was very good. Ron's hanging heart finally settled down and the problem was solved.

AAK hydraulic valve mainly uses NBR sealing ring. This material not only has high temperature resistance, good adhesion, and corrosion resistance, but also mainly oil resistance, acid resistance, waterproof and anti-aging. It is the first choice for sealing the hydraulic system. At the same time, we can also according to the customer's requirements for different use scenarios of the hydraulic valve, specially match the sealing ring with different media to reach the standard of zero oil leakage. This is why many new and old customers choose to cooperate with us, not easy to change suppliers.

One month later, Ron visited our company. He was very impressed by our comprehensive professional knowledge and determination of quality. And thanks to us for recovering at least 40% of its losses last time, and now the purchase volume of those old users has increased by nearly 30% over the same period. What's more, he signed a cooperation agreement with us for the whole year, with a purchase volume of US$800,000. He told me quietly that the headquarters was very satisfied with him and trusted him, so that he had the opportunity to place large orders on site.

AAK hydraulic valve, is very strict to quality, looking forward to your trial order!

Zero is from Italy, responsible for purchasing hydraulic valves in East China, and has been doing well. However, he suffered a big loss this time. More than 25% of the pilot type hydraulic valves purchased from China recently will be stuck and out of order after being used for a period of time, which seriously affects the control of pressure and flow. At present, 20% of the products are unsalable. What's more troublesome is that some customers ask for return. The headquarters was very angry and asked for a reasonable solution within 15 days.

For such type of situation, if the internal parameter test of the product is compliant, the problem should be the selection of material, especially the selection of valve sleeve material, which is directly related to the stability of hydraulic valve. The domestic 1214 steel is easy to cut, with high output, and the loss of machining blade is relatively small. Therefore, in order to save cost, most of peers use domestic 1214 steel as valve sleeve. However, the potential problems, such as brittleness and easy deformation due to heat treatment, are often ignored. If the valve sleeve is deformed, it will cause the spring base to get stuck and out of control in the process of tightening and loosening, and affect the control to the pressure and flow.

Through Internet search, Zero found that 40Cr was mentioned in an article about valve sleeve material on our website. So he took the initiative to contact us, and got a detailed understanding of the difference between 40Cr and domestic 1214 steel. Due to the urgent time given by the headquarter, after listening to our analysis, Zero sent us the draft of this order with the mentality of trying, and asked us to use 40Cr material to make samples according to his parameters, so as to compare the quality. Seven days later, Zero received the samples and compared the parameters of our products with the inventory products, and the parameters of the two products were basically consistent, but there is a gap error of several μm on the internal thread of valve sleeve. We told him that it was just such a detail about tiny error that determined the stability of the hydraulic valve. He immediately sent an email to the head officer in the headquarters, stating the problems and solutions, and also placed an order with us.

Why is there an advantage of several μ m on the error? The main reason is that all AAK hydraulic valve sleeves are made of 40Cr. After heat treatment, especially for steel surface hardening such as high frequency quenching and tempering, we have our own professional technology. The toughness, plasticity and wear resistance of the treated valve body can achieve the best comprehensive mechanical properties and enhance the fatigue resistance of the valve body, this is what other materials lack.

Zero purchased AAK hydraulic valves in April the first time. A re-peat order was issued last month, and the quantity was twice as much as last time. He told me that since the use of AAK hydraulic valves, the feedback from users is getting better and better, and the demands is also increasing. The headquarters is very satisfied with him. Today's email tells us that the headquarters has upgraded the East China office to the purchasing headquarters in China. He is the head of the purchasing headquarters.

AAK hydraulic valves use 40Cr as the valve sleeve, the pressure and flow control is not only smooth, but also safe to use, more at ease!

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Mr. Li is a purchaser of a foreign trade company in Guangdong Province. In April this year, two batches of hydraulic valves with a total value of more than 300,000 US dollars were shipped. Due to too much trust in the manufacturer, they ignored the quality control in production, resulting in hidden quality defects such as the valve core deviated from the central shaft. The customer was very angry and asked the company to give solutions within half a month. After knowing this, the boss was also anxious and blamed Mr.Li seriously and asked him to give solution within one week. Due to very limited time, Mr.Li was like an ant on a hot pan.

After some search, Mr. Li found that in the current hydraulic market, more than 90% of the factories use CNC lathe to produce hydraulic valves. Because there are too many uncertain factors in CNC lathe, once you operate the hydraulic valve improperly, it is easy to have assembly error, and the valve core deviates from the central axis and other hidden quality defects. What's more, it's not easy to find out, until the pipeline leaks, it's still not easy to judge whether there is a problem on the valve.

At the 24th Asia international power transmission and control technology exhibition held in Shanghai, Mr. Li came to my booth and took out their shipment samples. I found that the main line was deviated, and the valve core deviated from the central axis, which was almost the hidden problem in the industry. I told him to give some of my samples to the customers, try the quality of AAK hydraulic valve, and compare with the other ones manufactured in China. After one week, Mr. Li called me and confirmed an order of $100,000. I was told that after the exhibition, he arranged to send the samples to foreign customers. As soon as the customers tested, they were very satisfied with the quality of these samples. They not only had good surface gloss, high precision, but also had super sealing performance. At the same time, his boss was very happy to keep the old customer and praised Mr. Li.

In order to achieve zero leakage of the hydraulic valve, AAK Hydraulic Valve imported the Swiss machine with the highest accuracy to make up for the disadvantage of CNC lathe and completely avoid the assembly error caused by operation error. At present, less than 10% of the peers have this equipment. It can replace seven groups of accessories randomly. The precision of high pressure throttle hydraulic valve produced by Swiss equipment is indeed high, which is at least 20% higher than that of domestic conventional CNC lathe.

After three months, Mr. Li issued a $200,000 re-order again, telling me that since the use of AAK hydraulic valve, he successfully retained his major customers and ensured the normal operation of the future orders. At the same time, the boss was so impressed by his ability to handle things and promoted him to be the purchasing manager. When chatting in private, he was still joking, if he had not met us, he might have lost his job, but now he is a purchasing manager.

Do you still worry about leakage if using AAK hydraulic valve?

https://youtu.be/E5CNOQz11k8

Jensen is the purchasing manager of a hydraulic valve company in the Netherlands. Recently, he has received continuous complaints. The oil seal effect of a batch of hydraulic valves purchased in March was poor after being used for less than 6 months. At first, it was very good, but the oil leakage occurred after 6 months of use. At present, nearly 20% of users complain directly about this problem, and some ask for return. In view of the seriousness of the problem, the person in charge of after-sales went to the factory with him to investigate the cause. Jensen knows very well that if he can't solve this problem thoroughly, his manager position will not be guaranteed.

In order to find out the reasons in many aspects, Jensen visited many domestic manufacturers. Unfortunately, most manufacturers said that due to the limitation of conditions, they could not find out the cause and could not provide a reasonable solution. Jensen was extremely disappointed and in a bad mood.

Through the introduction of peers, Jensen came to our company with samples. After listening to his intention, we checked the products. It can be said that the quality is quite good, and the naked eye can not find the problem. After an hour and a half of more precise detection, the product parameters were carefully analyzed. The original main problem was caused by the excessive fit clearance between the threaded cartridge valve and the valve block. The inspection showed that the clearance was about 8 μ M-10 μ m, and other parameters were basically normal.

We explained to him that with these parameters, the reason for poor oil seal effect of hydraulic valve is clear. In the current hydraulic valve market, nearly 95% of the manufacturers can only control the gap between 8 μm and 10 μM. After being used for more than 6 months, some hydraulic valves will have slight oil leakage. After listening to this, Jensen understood, and then asked if we had a solution. Compared with his current shipments, the fit clearance of AAK hydraulic valve was reduced to 2-3 μM. Jensen was shocked to see such a big difference in data comparison, so he took a video on the spot and sent our parameter data to the headquarters. The next day Jensen confirmed the quantity of the order with us and signed the PO.

Under the premise of normal use, the shelf life of AAK hydraulic valve can be lasted for 1-2 years, mainly because it is equipped with skilled production masters and advanced production equipment. At the same time, each product must be debugged by the R & D team before production. After all parameters are tested to be qualified, large-scale production can be arranged. This is why the clearance between AAK hydraulic valve and valve block can be controlled within 2-3 μM.

Last week, Jensen came to our factory again and brought a re-peat order, which was 3 times as much as before. In private, he also teased that if he had not met us, he already was not the manager any more. Now he has successfully kept his position and the boss is paying more attention to him.

High quality oil seal effect, AAK hydraulic valve can reach the height that peer can not reach!

https://youtu.be/E5CNOQz11k8

AAK relief valve inner hole grinding (internal grinding) has to be debugged for at least 3 times, and large-scale production can be arranged only after seamless connection with valve core, which can avoid vibration and suppress noise. We are proud to say that at present, nearly 90% of manufacturers can not do so.

The relief valves from many manufacturers has a same problem, after being used for some time, there will be varying degrees of vibration and noise. This is due to the neglect of the control of the accuracy of the inner hole, resulting in the roughness of the inner hole. Therefore, in the process of use, after being adjusted several times, the valve core will be stuck, causing the pressure fluctuation of the relief valve, resulting in vibration and noise, which directly affects the normal use of the relief valve.

Some time ago, a Singaporean customer contacted us through the website, and a batch of relief valves was complained by consumers due to quality problems. There is no problem in the test before delivery, but there is noise in the hands of consumers. Nearly 30% of the products in the same batch have this problem.

Since we didn't see the relief valves, we couldn't analyze the specific reasons. We suggested that he send us several samples for detailed analysis. Seven days later, I received the relief valves from him. The surface gloss of these samples is very good. The internal parameter test shows that the accuracy deviation of the inner hole is very large (rough). After adjusting the flow rate for many times, it is easy for the valve core to be stuck, which is the key reason for vibration and noise.

We emailed him the test result, together with our product parameters. After receiving it, the customer immediately called back for consultation. I told him that in order to save costs and pursue production efficiency, many manufacturers ignored the control of inner hole precision in the production process. As long as consumers use it several times, the valve core will be stuck, resulting in the main valve not opening up or the main valve closing without pressure relief, which will cause the pressure fluctuation of the relief valve and cause vibration and noise. At the same time, the customer compared our relief valve parameters and was very shocked, so he requested us to send some samples at their cost to them for comparison.

Half a month after sending the samples, we received an order from him. After the comparison test, the customer confirmed that there was no noise problem in the AAK relief valves, and the parameters were acceptable to them, so they decided to place an order with AAK.

In order to avoid the vibration and noise problems caused by the stuck valve core, AAK has already controlled the precision during the punching and grinding of the inner hole in the early stage, and each batch of relief valve must be debugged for 3 times to ensure the seamless connection with the valve core. After confirming that the processing accuracy is qualified, large-scale production can be arranged. In fact, only every process is not careless, a good relief valve can be made. The principle is simple, but often 90% of the manufacturers do not take it seriously.

Vibration and noise? You will not have this problem if using AAK flow valve. It is also not expensive because it is easy to use - great quality without trouble.

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Andreas is a purchaser of a hydraulic cartridge valves company in Germany, he has been successful for several years. Recently, due to the delay in the delivery of a special order, the relationship with the customer is very tense. If it is not handled properly, it is easy to lose this big customer with an annual volume of more than 1.2 million US dollars.

The manufacturer promised to deliver the goods within 3 months, but now the production efficiency is slow and the output can't keep up with the previous arrangement. Andreas went to the factory half a month in advance to keep an eye on the goods but it did not work. Everything was smooth from quoting to ordering. He didn't expect that it would end up stuck in the production delivery date. The delivery time was approaching, but the goods could not be delivered. Andreas was helpless and had to negotiate with the client about the delivery extension or order cancellation. The customer is very angry after receiving the email. Cancellation will cause immeasurable loss because it is a special order. The customer is forced to agree to delay for 2 months. Andreas walks on the thin ice, if he does not operate properly, the company will pay a high amount of penalty.

It is the first time for Andreas to encounter such a situation that the delivery time is estimated to be sufficient but goods can not be delivered in the later period. Some domestic manufacturers are not serious about the delivery date at all, because they are used to the domestic sales and the production is slow, and the workers get off on time. If the customer is in a hurry, nearly 90% of the manufacturers will choose to outsource processing. However, due to the uncertain factors of Midway transportation and the quality problems caused due to rush production by different factories, it is inevitable that the quality will be uneven. At the same time, it will not be able to guarantee the customer's delivery time. This is why the delivery time is estimated to be efficient in the early stage, but not in the later stage.

In the face of pressure and lessons, Andreas can only decide to change suppliers to divert orders. During the field visit in Zhejiang, he came to our company by chance. He noticed that we were equipped with a number of high-precision imported CNC lathes and a lot of small-scale processing equipments. Due to no cooperation, he has some concerns about the delivery time and quality of our company. However, he paid attention to many of our tweets, he realized that we are not only professional, but also do hydraulic valves with mindfulness and treat customers with sincerity. Andreas firmly transferred the order to us.

One week after the start of production, Andreas came to our factory and planned to stay for 2 weeks to track the quality and progress. Five days later, he suddenly said that he had to go to other factories for something, and he is OK for us to provide him with daily production report and quality inspection video. After 40 days, mass production was fully completed. On the premise of ensuring the quality, it was finished 15 days ahead of time. Andreas is awed by our credibility.

AAK hydraulic valve factory not only has high-precision imported CNC lathe, but also operates the workshop 24 hours a day. The employees work in two shifts to ensure that the production line is manned all day and the output can be 40% higher than that of peers. At present, 90% of the manufacturers do not have the equipment of this scale.

Two months later, Andreas issued a repeat order. Since cooperating with us, Andreas has not only avoided unnecessary losses in the early stage, but also successfully recovered the reputation of major customers. Since the use of AAK hydraulic valve, the order volume in the same period has gradually increased, and the reputation is getting better and better. He told me privately that it was the boss who asked him to keep track in our factory for two weeks. He stayed for only 5 days and left because he firmly believed that the order would not go wrong.

Guaranteed quality, quantity and delivery, what else do you worry about AAK hydraulic valve?

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Mr. Chen is the purchasing manager of a well-known foreign trade company in Zhuhai. Recently, a batch of goods produced in other factories had quality problem. With the delivery time approaching, but problem could not be solved, he has a big headache and can not eat or sleep well. A batch of relief valves made of 45 steel were produced under the normal debugging of the lathe, but after inspection, it was found that the inner hole was seriously worn and deformed, not to mention the valve core. Even if re-adjusted the parameters of the lathe, same problem still exists. Due to the serious deformation, the production has to be stopped but the delivery time is approaching, the boss is also in a worry.

After some search, Mr. Chen found that the material of 45 steel is soft and easy to wear. Even after heat treatment, the hardness can not meet the test requirements. Therefore, the use of this material is limited, generally only applicable to the parts with light stress and less wear points. However, in the face of increasingly fierce competition in the hydraulic valve market, many manufacturers choose to use this material for its cheaper price to save cost. Therefore, 45 steel has become the first choice for their processing materials, which results in uneven product quality and market price chaos. Mr. Chen is not an exception, the original focus changed from quality comparison to price comparison.

Through the Internet search, Mr. Chen found our website and checked the parameter list of the relief valve. At the same time, he also noticed that we had an article on steel analysis in the early stage, so he took the initiative to contact our customer service and inquired about some properties and advantages of 40Cr steel material. Finally, with the mentality of trying, he transferred the order to us. After a week, he tested our samples. Mr. Chen didn't expect that the problems of wear and deformation could be solved easily, and the hardness test also went to a new height.

The most commonly used material of AAK hydraulic valve is 40Cr steel. After heat treatment at appropriate temperature, the material not only achieves excellent comprehensive mechanical properties in terms of toughness, plasticity and wear resistance, but also enhances the fatigue resistance and hardenability of the product and prolongs the service life of the product. At the same time, our company has our own special technology on the surface hardening treatment of steel such as high frequency quenching and tempering.

It has been 3 months since we delivered the goods to Mr. Chen. Today, he purchased another batch of relief valves made of 40Cr steel. He told me that since the use of AAK hydraulic valves, customers have no complaints about material wear and leakage, and the purchase volume is gradually increasing. According to the current ordering frequency, the annual sales is expected to have a 30% increase compared with previous years. The boss is very happy and pays more attention to him now.

With AAK hydraulic valves made of 40Cr steel, do you still have the concern of quality comparison?

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AAK strictly controls the fit clearance between the valve and the inner hole of the valve sleeve. For hydraulic valves with valve diameter less than 20mm, most of the factories has a fit clearance between 8μm and 20μm, and we can achieve 8μm-14μm, our deviation standard is 30% smaller than that of other factories. A Portuguese customer hesitated again and again, and placed an order with AAK 6 months later.

The fit clearance between the valve and the inner hole of the valve sleeve is very important in the whole hydraulic system. At present, many manufacturers have no such consciousness. In pursuit of profit, nearly 90% of the manufacturers try to reduce working procedures in order to speed up the production. The fit clearance is too large or too small, they do not care very much, as long as it can be assembled, the goods can be shipped. However, if the fit clearance is too large, the valve will skew in the valve sleeve, which makes the valve easy to be stuck; if the fit clearance is too small, the friction resistance will increase, and the valve will not move smoothly. Therefore, the fit clearance between the valve and the inner hole of the valve sleeve affects the normal use of the hydraulic valve seriously.

In discussing the problem of the fit clearance between the valve and the inner hole of the valve sleeve, the most impressive one in my mind was a Portuguese customer who just asked only some tentative questions and some data from us at the beginning. To my surprise, about 1 week later, he sent a very long email. It turned out that he had a batch of hydraulic valves, because of the improper fit clearance between the valve and the inner hole of the valve sleeve, nearly 30% of the products were unsalable. His original manufacturer had limited technical level and unfriendly service, was not able to give a solution even after the problem came out for two weeks, so he came to us for help.

We suggested that it is better to send hydraulic valve samples to us for analysis. Half a month later, we received the hydraulic valve samples sent by him. After testing, it was found that on the hydraulic valves with diameter less than 20mm, the fit clearance between the valve core and the inner hole of the valve sleeve fluctuated, some is 24μm, some is 15μm and some is 8μm. Obviously, the fit clearance accuracy was seriously insufficient, and the product accuracy was insufficient. Our standard acceptable range is 8-15μm, that is to say, our deviation standard is over 30% smaller than his original manufacturer.

Half a year later, this customer sent an email asking if we still have the hydraulic valve samples he sent last time and asked us to make proofs according to his samples first, and he will send an official order in three days. He told us that because of trust and admiration for our professional control to the fit clearance, there is no need for him to hesitate any more to place the order with AAK.

AAK hydraulic valve is very strict to the precision control. On the control of fit clearance, if the fit clearance is too small, we will grind the valve, whereas if the fit clearance is too large, we will re-match the valve, sometimes we will use our own patent electroplating process to increase the valve diameter, until the fit clearance debugged within the range of the standard. Presently, nearly 90% of our peers will not do like this or are not able to do so.

The accuracy of AAK hydraulic valve is recognized by the industry peers. What are you still waiting for? Come and try the order!

https://aakindustry.com/article/the-fit-clearance-between-aak-valve-and-valve-sleeve-is-30-smaller-than-peers-the-portuguese-customer-orders-half-a-year-later-i00029i1.html

Jensen is the purchasing manager of a hydraulic valve company in the Netherlands. Recently, he has received continuous complaints. The oil seal effect of a batch of hydraulic valves purchased in March was poor after being used for less than 6 months. At first, it was very good, but the oil leakage occurred after 6 months of use. At present, nearly 20% of users complain directly about this problem, and some ask for return. In view of the seriousness of the problem, the person in charge of after-sales went to the factory with him to investigate the cause. Jensen knows very well that if he can't solve this problem thoroughly, his manager position will not be guaranteed.

In order to find out the reasons in many aspects, Jensen visited many domestic manufacturers. Unfortunately, most manufacturers said that due to the limitation of conditions, they could not find out the cause and could not provide a reasonable solution. Jensen was extremely disappointed and in a bad mood.

Through the introduction of peers, Jensen came to our company with samples. After listening to his intention, we checked the products. It can be said that the quality is quite good, and the naked eye can not find the problem. After an hour and a half of more precise detection, the product parameters were carefully analyzed. The original main problem was caused by the excessive fit clearance between the threaded cartridge valve and the valve block. The inspection showed that the clearance was about 8 μ M-10 μ m, and other parameters were basically normal.

We explained to him that with these parameters, the reason for poor oil seal effect of hydraulic valve is clear. In the current hydraulic valve market, nearly 95% of the manufacturers can only control the gap between 8 μm and 10 μM. After being used for more than 6 months, some hydraulic valves will have slight oil leakage. After listening to this, Jensen understood, and then asked if we had a solution. Compared with his current shipments, the fit clearance of AAK hydraulic valve was reduced to 2-3 μM. Jensen was shocked to see such a big difference in data comparison, so he took a video on the spot and sent our parameter data to the headquarters. The next day Jensen confirmed the quantity of the order with us and signed the PO.

Under the premise of normal use, the shelf life of AAK hydraulic valve can be lasted for 1-2 years, mainly because it is equipped with skilled production masters and advanced production equipment. At the same time, each product must be debugged by the R & D team before production. After all parameters are tested to be qualified, large-scale production can be arranged. This is why the clearance between AAK hydraulic valve and valve block can be controlled within 2-3 μM.

Last week, Jensen came to our factory again and brought a re-peat order, which was 3 times as much as before. In private, he also teased that if he had not met us, he already was not the manager any more. Now he has successfully kept his position and the boss is paying more attention to him.

High quality oil seal effect, AAK hydraulic valve can reach the height that peer can not reach!

https://aakindustry.com/article/the-oil-seal-clearance-of-aak-hydraulic-valve-is-3-times-smaller-than-that-of-the-peers-and-no-oil-leakage-a-customer-in-netherlands-placed-orders-i00025i1.html

AAK relief valve inner hole grinding (internal grinding) has to be debugged for at least 3 times, and large-scale production can be arranged only after seamless connection with valve core, which can avoid vibration and suppress noise. We are proud to say that at present, nearly 90% of manufacturers can not do so.

The relief valves from many manufacturers has a same problem, after being used for some time, there will be varying degrees of vibration and noise. This is due to the neglect of the control of the accuracy of the inner hole, resulting in the roughness of the inner hole. Therefore, in the process of use, after being adjusted several times, the valve core will be stuck, causing the pressure fluctuation of the relief valve, resulting in vibration and noise, which directly affects the normal use of the relief valve.

Some time ago, a Singaporean customer contacted us through the website, and a batch of relief valves was complained by consumers due to quality problems. There is no problem in the test before delivery, but there is noise in the hands of consumers. Nearly 30% of the products in the same batch have this problem.

Since we didn't see the relief valves, we couldn't analyze the specific reasons. We suggested that he send us several samples for detailed analysis. Seven days later, I received the relief valves from him. The surface gloss of these samples is very good. The internal parameter test shows that the accuracy deviation of the inner hole is very large (rough). After adjusting the flow rate for many times, it is easy for the valve core to be stuck, which is the key reason for vibration and noise.

We emailed him the test result, together with our product parameters. After receiving it, the customer immediately called back for consultation. I told him that in order to save costs and pursue production efficiency, many manufacturers ignored the control of inner hole precision in the production process. As long as consumers use it several times, the valve core will be stuck, resulting in the main valve not opening up or the main valve closing without pressure relief, which will cause the pressure fluctuation of the relief valve and cause vibration and noise. At the same time, the customer compared our relief valve parameters and was very shocked, so he requested us to send some samples at their cost to them for comparison.

Half a month after sending the samples, we received an order from him. After the comparison test, the customer confirmed that there was no noise problem in the AAK relief valves, and the parameters were acceptable to them, so they decided to place an order with AAK.

In order to avoid the vibration and noise problems caused by the stuck valve core, AAK has already controlled the precision during the punching and grinding of the inner hole in the early stage, and each batch of relief valve must be debugged for 3 times to ensure the seamless connection with the valve core. After confirming that the processing accuracy is qualified, large-scale production can be arranged. In fact, only every process is not careless, a good relief valve can be made. The principle is simple, but often 90% of the manufacturers do not take it seriously.

Vibration and noise? You will not have this problem if using AAK flow valve. It is also not expensive because it is easy to use - great quality without trouble.

https://aakindustry.com/article/aak-relief-valve-must-be-debugged-for-3-times-without-vibration-and-noise-singapore-customer-placed-an-order-immediately-after-comparison-i00026i1.html

AAK relief valve has already used Korean piano steel wire instead of carbon steel as the core material of pressure spring for a long time, which completely solves the vibration and noise problems caused by the deformation of pressure spring, which is not the only advantage of AAK relief valve. At present, nearly 90% of the factories can't do it, even if they think about it, they don't do it.

In the domestic market, many manufacturers do use carbon steel as pressure spring for relief valve. Carbon steel is cheap, easy to process and has high production efficiency. However, there may be a hidden and fatal problem. The hardness of carbon steel increases with the increase of carbon content, which leads to the decrease of plasticity and toughness, the weakening of tensile strength and the deterioration of stability. In use, as long as the spring is adjusted many times, the spring deformation is obvious and the resilience is weakened, which leads to the uneven pressure distribution and the radial force imbalance of the poppet valve, and causes the vibration and noise of the relief valve.

Mr.Wang, manager of a foreign trade company in Shenzhen, purchased a batch of relief valves in Zhejiang in the first half of this year. Now the customer complained that nearly 20% of the relief valves have vibration and noise phenomenon, seriously affecting the normal use of the relief valve. In order to find out the reason, Mr. Wang spent half a month in the main production base of hydraulic valve in China (Zhenhai, Ningbo, Zhejiang), and visited several manufacturers continuously.

The peer suggested him to contact AAK. After he arrived at our factory, we disassembled his relief valve sample and tested the parameters of the main parts such as the inner hole and spring. The results showed that the accuracy of the inner hole of the relief valve had reached the normal standard, but the tensile strength of the spring was not enough, which was the reason that affected the normal use of the overflow valve.

As early as five years ago, we have replaced carbon steel with piano steel wire to avoid vibration and noise caused by deformation of compression spring, and AAK relief valve has never received any complaints from customers.

After comparing the parameters of our relief valve assembled with the piano steel wire spring, he brought back some AAK relief valves for testing. About a week later, we received an order of 20,000 US dollars from the company of manager Wang.

AAK relief valve has been using Korean imported piano steel wire as the pressure spring. This material has high intensity, anti-fatigue performance, creep resistance, excellent flexibility and anti-corrosion. At the same time, its tensile strength is obviously much better than carbon steel. It is the first material choice for the pressure spring of AAK Hydraulic valves.

Why are orders for AAK hydraulic valves increasing? Because we've been working on small details and solving big problems one by one.
https://aakindustry.com/article/aak-relief-valve-uses-imported-piano-steel-wire-the-pressure-spring-has-no-noise-and-90-of-the-factory-can-do-but-do-not-want-to-do-i00030i1.html

The pressure spring used in AAK hydraulic valve is selected for 3 times, and then assembled into goods only after complete matching, which completely avoids the pressure shortage of the hydraulic system. At present, not many manufacturers control the quality accordingly to this standard, thus they encounter lots of quality complaints in this respect.

Many hydraulic valve manufacturers also use piano steel wire to make pressure spring, but the price of piano steel wire is high, and the processing technology is relatively difficult. In the production process of compression spring, if there is bending or the compression spring is too short, it will cause poor sealing performance of the joint between valve core (poppet valve) and valve seat. If the contact surface is too wide, impurities are easy to enter the valve body. This will increase the wear of valve core and valve seat, resulting in insufficient pressure in the hydraulic system.

A Russian customer who has worked with us for many years asked why there is big quality difference between AAK Hydraulic valve and some manufacturers. After using for a period of time, nearly 10% of their hydraulic valves have the problem that the system pressure can not go up. It was thought that it was an assembly error, but still could not be solved after many times of debugging.

The customer sent us several qualified samples and also several samples with problem. After testing the pressure spring, the spring size in the unqualified samples varies, some parts are slightly bent. However, the spring size of the qualified hydraulic valves is normal. In the feedback report, we told the customer that the same batch of springs must be screened for 3 times to eliminate some defective pieces. If the manufacturer reduces cost, or the skill of producing piano steel wire spring is insufficient, then the spring will have problem and the hydraulic valve system pressure can not raise high in the process of use. After knowing all the information, the customer had a careful deliberation, and informed us 3 days later that they decided to list AAK hydraulic valve as their exclusive supplier.

AAK hydraulic valve has the piano steel wire pressure spring screened at least 3 times, first in the production process, then in the assembly process, and finally in the test bench to ensure that the hydraulic system pressure debugging is normal during the operation of the hydraulic valve.

AAK is extremely picky about the quality of hydraulic valves, not finding words to exaggerate it, we feel that is the case.

https://aakindustry.com/article/the-pressure-spring-of-hydraulic-valve-was-assembled-after-3-times-of-selecting-and-aak-became-the-exclusive-supplier-of-a-russian-customer-i00031i1.html

The roughness of the mounting surface of the hydraulic valve will seriously affect the leakage of the hydraulic system. The roughness Ra of most factory mounting surfaces is generally 0.9-1.0 μm, while AAK can achieve less than 0.8 μm, which completely solves the external leakage of the hydraulic system. After comparative testing, an American customer finally decided to place order with AAK.

Many domestic factories ignore the accurate grinding of the mounting surface of the hydraulic valve, resulting in the rough surface of the products and the weakening of the sealing during the installation process, resulting in the increase of leakage.

Andy, an American customer who didn't cooperate with us two years ago, recently contacted us again after being recommended by his good friend Jone to inquire about the leakage of the hydraulic valve. He has an order, 15% of the hydraulic valves have the leakage problem, the manufacturer has not been able to give an effective solution.

We suggest Andy sending us the sample of hydraulic valve for analysis. A week later, we received the sample of hydraulic valve. After testing, it is found that the roughness of the mounting surface of these hydraulic valves is 1.2 μm, 1.0 μm and 0.9 μm. the roughness fluctuates and cannot be stabilized in a standard range, which is the cause of the leakage of the hydraulic valves. After giving feedback on the test results, we told Andy that the roughness of the AAK hydraulic valve mounting surface was controlled within 0.8 μ m at present, and we also sent three hydraulic valve samples to him for reference.

A month later, this American customer, who had never thought of cooperating with AAK, placed an order worth 106,000 US dollars to us. He told us that he have been paying attention to the quality of AAK hydraulic valve in recent years. This time, because of the strong recommendation of our American customer and our professional problem-solving skills, he has strengthened his determination to cooperate with us.

AAK hydraulic valve pay great attention to external leakage, quality control of sealing ring and roughness control of mounting surface, never careless, through precise CNC lathe instrument, adjust parameters to conduct mounting surface grinding test for many times, and grinding again, until the Ra value is less than 0.8 μm, it is qualified, this is far more than 95% of peers.

To achieve zero leakage of the hydraulic valve, AAK is the right choice!

https://aakindustry.com/article/aak-hydraulic-valve-has-no-leakage-an-american-customer-placed-the-first-order-for-100000-us-dollars-i00032i1.html

AAK relief valve strictly controls the roundness error of oil sealing surface within 0.005 - 0.01mm, so as to avoid unbalanced force of pressure regulating spring due to rough circumferential surface, which aggravates the oscillation of poppet valve and causes squeal problem. Dutch customer directly placed an order after comparing several relief valves from different factories.

Recently, a customer mentioned that the relief valves purchased from some manufacturers have a scream after being used for a period of time. After further understanding, it is found that many manufacturers do not control the roundness error of the sealing surface accurately. The test results show that the roundness error of the sealing surface of the pilot relief valve produced by some manufacturers is generally between 0.012 - 0.02, which will inevitably lead to unbalanced force to the pressure spring, aggravate the oscillation of the poppet valve, resulting in squeal phenomenon.

In mid-December, Mathias, a Dutch customer, contacted us through his friend Andreas. Nearly 10% of the relief valves that he recently purchased elsewhere have quality problems, which seriously affect the normal use of the hydraulic valve system.

Each manufacturer's production process, precision processing are different, we cannot give an accurate solution before we see the product. Mathias arranged to send out several hydraulic valves in stock on the same day. A week later, we tested the parameters of the samples we received. After testing, we found that the circumferential surface of these products was rough and the roundness error was between 0.012 mm and 0.02mm, which made the relief valve squeal. We sent the test parameters and analysis results to Mathias, and told him that the roundness error of the sealing oil surface of AAK hydraulic valve can be accurately controlled within 0.005 - 0.01mm. At the same time, we attached the parameter comparison of similar models, which is what many peers lack at present.

Seeing nearly twice the error control, but also out of the trust of his friend Andreas, Mathias placed the first order of more than 60,000 US dollars the next day, and stressed that it must be produced according to the existing parameters of AAK, which strictly controls the roundness error of the sealing surface of the hydraulic valve.

AAK Hydraulic valve is an enterprise that is obsessive about cleanliness. It strictly controls the quality of its products. Since the start of the factory, it has constantly updated its advanced measuring instruments. From traditional calipers to today's electronic measuring instruments, it accurately controls the error range to ensure the normal use of the products. This is why AAK can achieve nearly twice the error control for the same roundness of sealing surface.

With the AAK hydraulic valve, there is no harsh scream.

https://aakindustry.com/article/aak-relief-valve-has-never-had-a-squeal-problem-dutch-customer-issued-their-first-order-for-60000-i00033i1.html

Meticulously production attitude, American customer finally chose to cooperate with AAK

5 years ago, Mike was the backbone of a hydraulic valve company in the United States, responsible for domestic purchasing. Unexpectedly, he was arranged by the company to set up an office in China, so he had to bite the bullet and left his warm home for China. In Ningbo, he found many factories, but has not found any qualified suppliers. The U.S. headquarters is not satisfied with the progress of his work.

At that time of 5 years ago, due to the limitation of process equipment, the accuracy and stability of most of the hydraulic valves could not meet the requirements of the customers. At the same time, the operators were not skilled, they were in a hurry for delivery, and the quality of the shipments was uneven.

Some peers introduced AAK to Mike. He came to our workshop and didn't take a look at our equipment. He was not very satisfied with most of our hydraulic valves. We felt his disappointment. When he saw the whole production process of processing the core hole in the center of the hydraulic valve block, he stayed there for almost 7 minutes to pay attention to our operators' techniques. In the end, he left without saying anything.

At that time, we also knew that the equipment was our short board, but we put great importance to the processing of the core hole in the center of the hydraulic valve block, and took this as the core position. Only the operator with at least 3 years of experience can be at this position. In order to meet the requirements of the drawing - H7 tolerance level, roundness 0.005mm, cylindricity 0.005mm, roughness Ra0.8, two hole coaxiality 0.1mm, we adopted the processing technology of drilling, boring, reaming and rolling. Firstly, the bottom hole is processed to the processing capacity of φ 13 by alloy drill; secondly, the two-way boring is carried out with the coarse boring cutters of φ 13.8 and φ 15.1 to ensure the position accuracy of the hole; thirdly, the alloy reamer of φ 13.99 is used to stabilize the diameter of the hole. Finally, the size accuracy of the hole can be ensured by the adjustable rolling tool, and the roughness value required by the drawing can be achieved at the same time. Since in the industry for 10 years, AAK hydraulic valve has always been in the meticulous production attitude, and received support from a lot of customers.

After Mike visited the workshop, 3 days later, he gave us a drawing and asked us to make sample within 5 days. Finally, we became his first supplier in Ningbo. In the past 5 years, Mike purchased more and more from us year by year. He returned to the headquarters 2 years ago and is now the general director of overseas purchasing. By chance, I asked him why he had changed his view on AAK and chose to cooperate with us. He said that at that time, the hydraulic valve production equipment of many manufacturers were not mature, and the meticulous production state of AAK hydraulic valve employees conquered him. Fortunately, the whole production team of AAK hydraulic valve has never let him down in terms of quality and delivery date.

Meticulous production attitude is the premise of quality assurance of AAK hydraulic valve, welcome to try an order!

Is it 35% cheaper than AAK hydraulic valve? American customer is cheated and then return to AAK to place orders

2 years ago, an American customer came to AAK to purchase a batch of hydraulic valves with special requirements. After receiving the shipment, the customer was full of praise for the quality. 3 months later, the re-peat order asked for a 35% discount, because he found a factory 35% cheaper than ours. We feel very confused. As far as we know, the hydraulic valve with special requirements is unlikely to sell at such a low price, but the customer still insists on it. We can only remind the customer to confirm the product quality before placing an order, so as to avoid being cheated. In the following year, we took the initiative to contact the customer, and the customer did not reply to us.

In November, the American customer contacted us again, and we asked why the customer chose to place an order with AAK again? The customer said that the quality of the hydraulic valves they purchased from other factories was unstable. Some of them leaked oil, some of them made noise, and some of them had problems maintaining pressure. As a result, their working stopped for several months. His boss was very disappointed with him. He also tried to take samples from other factories, but found that the quality of AAK hydraulic valve is the most stable. They are worried about whether we have increased the price, our answer is: the product quality is still high quality, the price is still the same. Last week we received his third re-peat order.

AAK hydraulic valve is favored by customers all over the world. I always associate quality with my own character. If something is wrong, it means that my character is wrong. The topic of quality has been talked about countless times. This is something that almost everyone talks about, but how many people are determined, sincere and have the ability to ensure quality and quantity at the same time? My idea is different from that of my peers. People talk about price before quality, but I insist on quality before price. People choose steel which is easy to process, but I choose steel which has stable performance, so as to better ensure product quality. This is the advantage of AAK hydraulic valve.

I am a "face" person, can not tolerate quality errors. To tell you the truth, most of the time, at all costs, we have to keep the quality of the hydraulic valve. Sometimes the profit is very small, but we have won the long-term customers of the hydraulic valve.

Cooperation with AAK, cooperation is character.

Smith is the purchasing director of a company for hydraulic valves in Pennsylvania, USA. Recently, there is an order that the pre-production samples are not consistent with the product drawing, and even after several revisions, the modified samples still can not match the drawings. Because the manufacturer has no professional engineer, the proofing master can't understand the drawings 100%, which leads to the difference between the pre-production samples and the drawings. Smith is very anxious because the delivery date is not waiting for him. The requirement of the headquarters is to find a reasonable solution within 15 days.

At present, in China, some manufacturers do not have professional design engineers, and the understanding of drawings is prone to deviation, not only the size problem, but also the core of product parameters. Even if the assistant can understand the drawings and let the proofing master follow the idea, it is likely that he will not be able to meet the customer's requirements, especially for the hydraulic valve which is particularly picky about the quality of details. With the instructions of the headquarters, Smith visited a number of manufacturers one after another, they either have no professional design engineers, or there were shortcomings in processing technology.

Smith contacted us through the Internet. After several email communications, Smith's team decided to visit our factory in 3 days. Smith visited our workshop, took out a set of design drawings, discussed with our technical team for 2 hours, and finally asked us to send samples within 10 days. Soon, we sent a sample of the hydraulic valve in only 1 week.

After receiving the approval sample, Smith immediately tested the product parameters, and the test results were consistent with the requirements of the drawing. Only then he can be assured that the requirements of the headquarters were achieved and the problem was solved.

After half a year of cooperation with AAK, Smith increased his business with AAK continuingly, especially on the development of new products, we have always been their first choice. Smith is now not only the company's head of hydraulic valve procurement, but also the head of the company's design department.

AAK hydraulic valve professional technical team, let you save time and have no worry.

https://aakindustry.com/article/aak-took-over-to-solve-the-problem-of-hydraulic-valve-not-matching-drawing-become-the-preferred-supplier-of-an-american-customer-i00036i1.html

AAK hydraulic valve has the quality that peers can't do. A Spanish customer chose a cheaper price but still moved the order back to AAK finally

In August last year, a Spanish customer paid for the proofing fee and asked us to proofing according to his drawings. After receiving the approval samples, he was very satisfied with the quality. In the order confirmation stage, he was not satisfied with our quotation, and his target price was 20% lower than our quote. We tactfully told that for such a high quality hydraulic valve, we are indeed the most favorable price. After this email, we have no information about this guest any more.

A few days ago, the Spanish customer sent us an email asking if we are interested in continuing to make their order for hydraulic control check valve according to the price discussed in August last year. We asked the customer why they chose to place an order with AAK again. The customer said that last year, because he thought our price was too high, he chose another supplier.

In the later communication, I learned that the price of the factory they cooperated with last time was 20% cheaper than ours, so he chose to place an order for this factory. However, in the inspection stage, the quality of the bulk goods went wrong. Nearly 20% of the products produced can not return to the initial oil sealing position when they are closed, or when they are closed in the reverse direction, the valve core can not strictly seal the liquid flow and cause leakage, or they can not reach the reverse unloading. He can't deliver goods of this quality, and the factory doesn't cooperate with him to produce again. He also tried to let other manufacturers to proofing, but the parameters of the hydraulic check valve sample are not stable, he did not dare to place an order.

This time, in order to ensure the quality and free of trouble, he decided to choose AAK again. The next day, we received this return order from him as scheduled.

AAK hydraulic valve is tolerant to all cooperative customers. We don't force customers to place orders, or deliberately cater to customers' low price demand to make low-quality hydraulic valves. Customers who choose AAK hydraulic valve don't believe in low price and good quality. High price has its own quality and after-sales service that low price can't make.

AAK hydraulic valve focus on brand and reputation, do not do poor business, do not do business that just comparing price, do not do credit orders.

AAK relief valve hydraulic system has pressure for 100%, successfully save VIP customer of a California company

Caleb is the purchasing manager of Red and White Valve company in California. He is responsible for purchasing all the hydraulic valves in China. This time, he fell over the hydraulic system of the relief valve. Nearly 20% of the relief valves purchased have no pressure in the hydraulic system during commissioning, then the customer have not been able to receive the full shipment due to shortage resulted from defective products.The general manager of import dept was angry and asked Caleb to meet the demand of this VIP customer within 3 weeks. However, the original supplier is in lack of technology, and always get no accurate solution. For getting into this trouble, even the delicious Chinese dishes he has always liked are now dull.

There are several situations that lead to no pressure in the hydraulic system of the relief valve:

1. The relief valve is not cleaned during the assembly process, and there are foreign matters between the valve core and the valve seat.

2. Due to low accuracy, the main valve core is stuck.

As long as the accuracy of the valve core and sleeve is guaranteed and attention is paid to the details in the assembly process, this phenomenon can be completely eliminated.

In the middle of January 2021, Caleb contacted us from the Internet. At that time, because the employees in the factory were busy on catching up delivery, they didn't notice his email that day. The next day, Caleb contacted us by landline. After a brief introduction and discussion, he hoped that our technical team would have an immediate conference call with him. After more than 2 hours of talking, he asked us to pay attention to his email, and then happily hung up. Ten minutes later, we received a relief valve design drawing and a relief valve stock sample picture from Caleb, he asked us to submit the sample within 10 days. Soon, we sent samples of relief valve in 5 days. We also received the sample fee and express fee that he paid voluntarily.

Half a month later, we still didn't hear back from Caleb. We thought that he didn't plan to proceed with this order. Surprisingly, when we came back from Spring Festival and opened our email, we found that Caleb's order was already there during the Spring Festival. Later, we learned that he asked for more than one suppliers to send samples. Finally, through parameter comparison and our proofing efficiency, he decided to cooperate with AAK without hesitation.

Yesterday, I interacted with Caleb on LinkedIn and learned that their VIP customer was very satisfied with the speed of their company's problem solving. The general manager of import dept also praised him at the summary meeting in January and called on other managers to keep up with him.

AAK hydraulic valve is not only professional for precision, but also for details, waiting for your drawings for cooperation.

https://aakindustry.com/article/list_c0000

5 samples and 4 times to improve accuracy, AAK Hydraulic valve is used in aircraft

Working hard for 2 years, we have changed materials for 4 times, proofed for 5 times, and finally passed the accuracy approval, helping Russian customer win orders for hydraulic valves used in aircraft. AAK hydraulic valve has won the order of hydraulic valve used in aircraft, which makes us stand out from many domestic hydraulic valve suppliers and becomes the exclusive supplier of hydraulic valve for Russian customer in the field of aircraft.

At present, there is a very common phenomenon in the domestic hydraulic valve industry, "selling appearance", what is "selling appearance"? That is, customers place orders to a large enterprises, but the large enterprises process nearly 80% of the parts at small enterprises. The main reason is that small and medium-sized enterprises have low processing cost. They use domestic raw materials, ignore the differences in processing technology, resulting in uneven quality, and a lot of small problems: stuck valves, oil leakage, wear and tear, etc., which seriously affect the performance of products. Can this kind of hydraulic valves be used in aircraft?

2 years ago, I saw a salesman's quotation email to a Russian customer. When I saw the price, I felt that it was abnormal. After further checking the drawings and the requirements of the use scenarios, I learned that although the hydraulic valve product is small, the requirement for accuracy is the biggest challenge in our history. Customer asked us to proofing, nervous heart from that moment began. In the past 2 years, our company has been replacing the machine tools imported from Germany with higher accuracy, replacing the conventional machines with the test bench with more comprehensive test parameters, finally, by replacing the materials for 4 times and sending samples for 5 times, within 2 years, our company has successfully passed the parameter test of the hydraulic valve used by Russian customer in the aircraft, successfully meeting the customer requirements, and has become the exclusive supplier of this Russian customer for the hydraulic valves used in the aircraft field.

Since its establishment in 2012, AAK has always put technological innovation, high-quality raw materials and advanced equipment in the first place. In particular, we have two imported CNC lathes and more than 10 domestic CNC lathes, the accuracy of our hydraulic valves is over 30% higher than the peers, while 90% of the peers do not have the configuration of the production equipment.

There is no other reason why Russian customer finally chooses AAK as the exclusive supplier of hydraulic valves on airplanes. It is because that it can meet the accuracy requirements that other suppliers can't meet. We are willing to do things that others don't want to do, and we also try our best to do things that others can't do.

Hydraulic valves can be used in the aircraft, AAK technology should give you enough confidence!

https://aakindustry.com/article/5-samples-and-4-times-to-improve-accuracy-aak-hydraulic-valve-is-used-in-aircraft-i00039i1.html

AAK one-way valve changed to use fluorine rubber seal, North Carolina customer placed the first order for $36,000

Leo, a hydraulic valve customer from North Carolina, recently ordered a one-way valve for forklift hydraulic system. Several approval samples could not be confirmed by his customer because of "slight error in some parameters". His customer was about to cancel the order. He is very anxious, there has been no suitable factory to cooperate with proofing.

Leo found our website on Google and sent an email asking if we could make a high demand check valve. After several times of communication, we learned that he received samples from several manufacturers but all the parameters of the hydraulic valves could not meet the standard. He asked whether we could help arrange proofing. To be safe, we asked if we can check the samples and parameters of the hydraulic valves that are not up to the standard first? A week later, we received the hydraulic valve samples from our Leo. After routine inspection, we found that the quality of these hydraulic valve samples was good. We were also confused why these hydraulic valves could not meet the standard.

If something goes wrong, there should a problem somewhere. We began to disassemble the hydraulic valve and eliminate the problem step by step. We found a little fluid mark on the surface of the seal ring of the hydraulic valve. Is there a mismatch between the seal ring and the medium? In the case of pressure and medium flow, the error of flow parameters does exist. We have found the reason why the samples of hydraulic valve can not be confirmed, the NBR seal is not suitable for the forklift hydraulic system. Perhaps few manufacturers will take the time to think and solve the problem. On the contrary, after two days of research, trial, analysis and discussion, AAK determined that fluoro rubber sealing ring is more suitable for such media, and its sealing performance and stability are more suitable than nitrile rubber sealing ring.

After 7 days, we successfully made several hydraulic valves, tested them by the test bench to make sure that the parameters were correct, then we sent the samples to Leo. After receiving the samples of our hydraulic valves, the engineer did not expect that their final customer was very satisfied with all the parameters of our samples after testing and analysis. The day after Leo received the samples, we also received his first order for the check valve worth more than 3,6000 US dollars.

Some factories are not willing to do simple hydraulic valves, but they are not able to do complex hydraulic valves well. The main reason is that the manufacturers do not have the awareness of craftsmen and ignore the control of details. The reason why AAK hydraulic valve quality has been recognized by customers all over the world in the past decade is that we always control details meticulously, can not tolerate a little sand, and always believe that details determine success or failure!

AAK hydraulic valve details control, save you time, AAK hydraulic valve craftsman consciousness, save you effort.

AAK professional hydraulic valve sealing ring, zero leakage to ensure your safety

Yesterday, we received an email from an American client that he saw several articles about the sealing ring of hydraulic valve introduced on our website and he was interested in knowing more and asked if we can introduce the classification of hydraulic valve sealing ring and the corresponding media types in detail.

We are happy to share this information, and would like to introduce the corresponding relationship between the seal and medium of hydraulic valve mainly from the following 3 aspects: types and medium resistance of hydraulic valve seal, material classification and application of hydraulic valve seal, and application and medium resistance classification of hydraulic valve seal.

The types of hydraulic valve sealing rings and the media they are resistant to are introduced as follows:

1. Natural rubber (temperature 0-80 ℃) is suitable for drinking water, hot water, oil-free air, etc., not suitable for petroleum media.

2. Silicone rubber (temperature 70-260 ℃) is suitable for drinking water, hot water, oil-free air and high temperature steam, but not suitable for petroleum media.

3. Ethylene propylene rubber (temperature 50-150 ℃) is suitable for hot water, dilute acid, oil-free air and a variety of chemicals, not for petroleum medium.

4. NBR (temperature 30-85 ℃) is suitable for petroleum products, air with oil vapor, vegetable oil and mineral oil, not suitable for hot water over 65 ℃ or hot dry air over 60 ℃.

5. Fluorinated rubber (temperature 6-1480 ℃) is suitable for a variety of oxidizing acids, petroleum, halogenated hydrocarbon, lubricating oil, hydraulic fluid, organic liquid and air containing carbon hydride.

AAK Hydraulic Valve can be used safely without accident!

AAK Hydraulic Valve adopts the safest sealing material, 100% leakage free

Some time ago, a Russian customer mentioned in a chat that many of his colleagues didn't know much about the material of the seal ring of the hydraulic valves and lacked judgment in the purchasing process of the hydraulic valves. They were recommended by the manufacturer every time, which led to the leakage of most products. How to select the material of the seal ring?

In fact, more than one customer has mentioned this problem to me. Today, we will continue to talk about "material classification and related application of hydraulic valve sealing ring" and other related issues as mentioned in the last article, maybe you can gain something from below brief introduction:

1. NBR: NBR has excellent resistance to fuel oil and aromatic solvents, but not to ketone, ester and hydrogen chloride. Therefore, oil resistant sealing products are generally based on nitrile rubber.

2. Fluorine rubber: fluorine rubber has outstanding heat resistance (200 ~ 250 ℃), oil resistance, can be used for manufacturing cylinder liner seal ring, rubber bowl and rotary lip seal ring, it can significantly improve the service time.

3. Silicone rubber: silicone rubber has outstanding high and low temperature resistance, ozone resistance and weather aging resistance. It can maintain its unique use elasticity, ozone resistance and weather resistance in the working temperature range of - 70 ~ 260 ℃. It is suitable for making the sealing gasket required in the thermal mechanism, such as strong light source lamp cover sealing ring, valve gasket etc.

4. Polyurethane rubber: polyurethane rubber has excellent grindability and good air tightness, and the service temperature range is generally - 20 ~ 80 ℃. In addition, it has medium oil resistance, oxygen resistance and ozone aging resistance, but it is not resistant to acid-base, water, steam and ketones. It is suitable for manufacturing all kinds of rubber sealing products, such as oil seal, O-ring and diaphragm.

AAK Hydraulic Valve: Any valve Any one Any time Any where, Just Safety

AAK hydraulic valve choose the right seal, no matter what medium is encountered, there is no leakage

After the first two articles about sealing rings and media have been posted, we have received a lot of e-mails from customers in recent days. It is very gratifying to find that many people have gained something. Today, we will continue to talk about the last aspect of "Application of common seals and classification of media resistance". The specific introduction is as follows:

1, NBR: oil resistance, heat resistance, corrosion resistance, good wear resistance, anti-aging. It is widely used in making sealing products, but not suitable for phosphate series hydraulic and gear oil containing polar additives. It can be used to make "O" ring and oil seal. It is suitable for general hydraulic and pneumatic systems. NBR is widely used in hydraulic valve system in China, and it is also the first choice of raw materials for hydraulic valve sealing ring.

2. Rubber and plastic: high modulus of elasticity, high strength, other properties as above. It is used to make O-ring, Y-ring and dust-proof ring. It is used in the sealing of construction machinery and high-pressure hydraulic system.

3. Fluororubber: heat resistant, acid and alkali resistant and other chemicals, oil resistant (including phosphate series hydraulic oil), suitable for all lubricating oil, gasoline, hydraulic oil, synthetic oil. At the same time, it is suitable for the sealing of high temperature resistant, chemical and fire-resistant hydraulic oil, and is widely used in metallurgy, electric power and other industries. Because of aging resistance and better elasticity than nitrile rubber, fluorinated rubber is preferred for hydraulic valves with high quality requirements.

4. Silicone rubber: good heat and cold resistance. The compression set is small, but the mechanical strength is low. It is suitable for high speed rotary seal at high and low temperature and food machinery seal. However, silicone rubber is not resistant to oil and has very poor aging resistance. Generally, it is not suitable for the hydraulic valve system. Because of the low price of silicone rubber, some manufacturers ignore the quality and choose silicone rubber as the sealing ring.

5. Polytetrafluoroethylene: good chemical stability, heat resistance, cold resistance, resistance to oil, water, steam, drugs and other media. High mechanical strength, high temperature resistance, wear resistance, low friction coefficient, good self lubrication. It is used to make wear-resistant ring, guide ring and retaining ring, and is a common sealing material in machinery, widely used in metallurgy, petrochemical, engineering machinery and light industry machinery.

AAK Hydraulic Valve, save time, worry, labor and money for you!

The inductance measuring instrument is installed on each lathe, and each part size of AAK hydraulic valve is accurate

The inductance measuring instrument is installed on every lathe, grinder and other equipment to ensure that the diameter, roundness and verticality of each part are displayed in time. The size of each part is accurate, and its accuracy can reach 0.5-1 μ m, and the parameters will be more than twice that of the same industry. This is unexpected to other manufacturers. German customer immediately sent an inquiry after visiting AAK Hydraulic Valve factory.

I still remember that at the end of BMW Shanghai 2018, Friedrich, a German customer, was very interested in AAK hydraulic valve. He asked me at that time, "How can the parameters of your products of the same type of hydraulic valve be better than those of other manufacturers?" I wittily replied that the thermometer is the key to the accuracy of temperature, if the measuring instruments of each factory are different, there must be parameter differences. As we were busy on closing up the booth, I gave him a business card before left and told him that if there is any problem, he would contact me at any time.

Two years later, Friedrich suddenly called me and said that he had arrived at the gate of our factory. At that time, I was very shocked. After further communication, I realized that he browsed many articles on our website, which was very enlightening. I showed him around the production workshop and told him the reasons for our advantages. He was shown the inductance meter. This instrument mainly uses the relative displacement of the inductance coil in the side head to display the measured size on the analog meter or digital meter through amplification, phase sensitive detection, analog-to-digital conversion, etc. its accuracy can reach 0.5-1 μ m, and its parameters will be nearly 2 times better than those in the same industry. It can accurately measure the size, which is the lack of other measuring instruments.

We use this advantage to install the inductance measuring instrument on each lathe, grinder and other mechanical processing equipment, which can measure the diameter, roundness, perpendicularity, etc. of the parts, and the processing size is indicated by the digital display meter of the inductance micrometer at any time, so that the operator can intuitively control it; and the micrometer can be given the required size in advance to make the processing to the required size. It will stop feeding and carry out the next action automatically. This can produce high-precision parts, but also reduce the waste rate of parts.

After listening to my introduction, Friedrich suddenly realized and recognized the accuracy of our products. Then he talked with us about some cooperation matters. Before going back, he asked us to prepare several samples for him to take back. After 15 days, Friedrich sent us an inquiry and emphasized the accuracy requirement of the product. We checked carefully and offered our quote based on his drawings and additional requirements. Three days later, Friedrich issued the official PO with amount of $100,000.

For the process quality control like AAK hydraulic valve, the peers have not thought of it. Our parameters are more than 2 times better than those of peers.

AAK Hydaraulic Valve, Any valve Any One Any Time Any Where, Just Safety for you

AAK Hydraulic Valve maintenance process not only less detours, but also save you more than 30% of the cost

Recently, I chatted with a European customer and learned that the vast majority of customers were vague about the maintenance process of hydraulic valves. If you follow AAK hydraulic valve maintenance process, not only less detours, you will also save more than 30% of the cost.

Disassembly and cleaning of hydraulic valve is the first process of maintenance of hydraulic valve. For the hydraulic valve failure caused by the oil deposition from hydraulic oil pollution or the granular impurities in the hydraulic oil, the disassembly and cleaning can generally eliminate the failure and restore the function of the hydraulic valve. Common cleaning processes include:

1) Remove. Although most of the parts of the hydraulic valve are connected by bolts, the design of the hydraulic valve is for non-disassembly. If there is no special equipment or professional technology, forced disassembly is likely to cause damage to the hydraulic valve. Therefore, the structure of the hydraulic valve and the connection between the parts should be mastered before disassembly, and the position relationship between the parts should be recorded during disassembly.

2) Check and clean. Check the dirt deposition of valve body, valve core and other parts, and remove the concentrated dirt with cotton yarn, brush and non-metal scraper without damaging the working surface.

3) Rough wash. Put the valve body, valve core and other parts on the tray of the cleaning box, heat and soak them. The compressed air is introduced into the bottom of the cleaning tank, and the residual dirt is cleaned by the agitation of bubbles. If possible, ultrasonic cleaning can be used.

4) Fine washing. High pressure positioning cleaning with cleaning solution, and finally drying with hot air. Qualified enterprises can use the existing cleaning agent, individual occasions can also use organic cleaning agent, such as diesel, gasoline.

5) Assembly. Assemble according to the assembly diagram of hydraulic valve or the assembly relationship of parts recorded during disassembly. Be careful not to damage the parts during assembly. The original sealing material is easy to be damaged during disassembly and should be replaced during assembly.

However, the following problems should be paid attention to during cleaning:

(1) for the dirt with long deposition time and firm adhesion, do not scratch the matching surface during cleaning.

(2) Pay attention to safety when heating. Some inorganic cleaning solutions are toxic and may cause poisoning when heated and volatilized, so they should be used with caution. At the same time, the organic cleaning solutions are flammable and pay attention to fire prevention.

(3) The cleaned parts should be preserved to avoid corrosion or re pollution.

(4) The assembled hydraulic valve can only be put into use after passing the test.

AAK Hydraulic Valve - buy at ease, use without worry, maintenance is also attentive!

AAK relief valve has no pressure loss, saving VIP customer for a Spanish client

The relief valve hydraulic system produced by AAK has pressure for 100%, the stability is over 90% of the peers, which helped a Spanish importer became more and more important for his VIP customer.

At present, in the domestic market, more than 90% of the manufacturers' hydraulic system will have the case of no pressure, because of the assembly process is not cleaned enough, leading to the existence of foreign bodies between the valve core and the valve seat. However, one of the most important reasons is that the accuracy of the product is not enough, so that the valve core is stuck in the process of use, the pressure is abnormal, and the manufacturer has to catch up with the schedule and save the cost. Under these conditions, there are many problems, and of course, customer complaints are increasing.

A Spanish importer of hydraulic valves purchased a batch of relief valves in China some time ago. Nearly 20% of the relief valves had unstable pressure, and there was no pressure in the hydraulic system during use, which resulted in that they could not be supplied to his customers in time. The VIP customer of the company complained to his boss because he couldn't receive enough goods.

After knowing this, the boss demanded to meet the quantity required by this VIP customer within 3 weeks. However, the original supplier's technology suck up and always failed to get the exact solution. When he hesitated, he happened to see the link of our AAK website on Google. After further checking, he took the initiative to contact us. After a brief introduction and discussion, he hoped that our technical team would have a meeting with him now. After more than 2 hours of communication, he sent us a design drawing and inventory sample picture of the relief valve, and asked us to submit our approval sample within 10 days. Soon, we sent the relief valve sample within 5 days, and also received the sample fee and express fee he paid voluntarily.

A month later, I received this order contract in the early morning, which I thought it was not going to carry out. Later I learned that he had asked many manufacturers to send samples. Finally, through parameter comparison, the stability of our AAK relief valve and our proofing efficiency were recognized by their VIP customer. So they decided to place an order with AAK without hesitation.

In order to make sure that the produced relief valve have pressure for 100% in the hydraulic system, during the assembly process, AAK relief valve is cleaned 3 times with oil to clean the foreign matters between the valve core and the valve seat, and then each relief valve is tested with a precision inductance measuring instrument to ensure the stability of each AAK relief valve and avoid the valve core sticking. AAK has meticulous production attitude, not only to keep pace with the times on the technology, but also the stability of AAK relief valve can catch up with and surpass 90% of its peers.

AAK relief valve has excellent technology, high stability, welcome to try!

AAK Hydraulic Valve ensures 0.8 μm accuracy and no leakage. A Spanish customer is enthusiastic and placed the re-peat order

The roughness of the mounting surface below 0.8μm has always been the mandatory quota of AAK Hydraulic Valve to against leakage. By controlling the roughness of the seal ring and the mounting surface, and adjusting the parameters, the mounting surface is grinded for many times to ensure that leakage is avoided until every AAK hydraulic valve is not likely to leak. The roughness of the mounting surface can be controlled below 0.8μm, which is difficult for domestic peers to achieve.

Juan is the purchasing director of a Spanish hydraulic valve company in China market. One of his regular customers increases the orders by more than 30% every year. Some time ago, the old customer gave him an order with high precision requirements, and the roughness of the mounting surface of the hydraulic valve should be less than 0.8μm. According to his current understanding, the roughness of installation surface in Chinese factories is generally between 0.9-1.0 μm, which is difficult to meet the requirements of the customer. He did not dare to refuse the order from this old customer, but also worried about the quality not meeting the requirements, so he was in a dilemma.

Juan asked all his suppliers, but no factory could guarantee this accuracy. At the moment of hesitation, Juan contacted us through the introduction of a factory, and expressed his concerns and the customer's requirements for the product. I also explained to him that 95% of domestic manufacturers often neglect the accurate grinding of the mounting surface of hydraulic valves, resulting in rough surface of products produced, the roughness values of mounting surface are usually 1.2μm, 1.0μm, or 0.9μm etc. The control range fluctuates and cannot be stabilized in a standard range, which leads to the weakening of sealing during the installation process. Once the roughness is not well controlled, the leakage will increase, and then affect the normal operation of the whole hydraulic system. It is a critical value for the roughness of the mounting surface to reach 0.8μm, which is also lacking in the technology of many manufacturers.

Juan bought 5 samples from our company and went back to do parameter testing. 15 days later, Juan sent his order to us. After repeated confirmation, we were advised that his customer was very satisfied with our product parameters. Before placing the order, the customer repeatedly stressed that the production should strictly follow the standard of the samples and designated our factory to produce the order for him.

It's been two months since we delivered the goods to Juan. Last week, he sent AAK a repeat order for $80,000, and told me that since the use of AAK hydraulic valve with surface roughness less than 0.8μm, this old customer has sent him more and more inquiries for the high-precision hydraulic valve, which has also led to the increase of orders for other hydraulic valves. Now the order volume in a quarter is more than twice that in the same period. Now the boss is paying more and more attention to him, and he is working harder and harder.

The high precision AAK hydraulic valve guarantees the accuracy of 0.8μm and no leakage, which makes the domestic peers despair.

AAK Hydraulic Valve recommends how to avoid power loss of hydraulic system

Today, an American customer talked to me about the power loss of the hydraulic system. I think it is necessary to talk about our AAK's point of view here.

People with a little mechanical knowledge know that energy will be converted to each other, and the conversion of energy also exists in the hydraulic system. On the one hand, the power of the hydraulic system will cause the loss of energy, which will reduce the overall efficiency of the system. On the other hand, the lost part of energy will be converted into heat energy, which will increase the temperature of the hydraulic oil, deteriorate the oil, and cause the failure of the hydraulic equipment . Therefore, when designing the hydraulic valve in the hydraulic system, on the premise of meeting the use requirements, we should also fully consider reducing the power loss of the system

Firstly, when the hydraulic oil flows through all kinds of hydraulic valves, there are inevitable pressure loss and flow loss. This part of the energy loss accounts for a large proportion of the total energy loss. Therefore, the reasonable selection of the hydraulic device and the adjustment of the pressure of the pressure valve is also an important aspect of reducing the power loss. The flow valve is selected according to the flow regulation range in the system, and its stable flow can meet the use requirements. The pressure of the pressure valve is as low as possible under the condition of meeting the normal work of the hydraulic equipment.

Secondly, if the actuator has the requirements of speed regulation, then when selecting the speed regulation circuit, it should not only meet the requirements of speed regulation, but also reduce the power loss as far as possible. The common speed control circuits are: throttle speed control circuit, volume speed control circuit, volume throttle speed control circuit. Among them, the power loss of throttling speed regulation circuit is large and the low-speed stability is good. The volume speed control circuit has neither overflow loss nor throttling loss, high efficiency, but poor stability at low speed. If we want to meet the two requirements at the same time, we can use the volume throttle speed control circuit combined by the differential pressure variable pump and the throttle valve, and make the pressure difference between the two ends of the throttle valve as small as possible to reduce the pressure loss.

Thirdly, suitable selection of hydraulic oil. When the hydraulic oil flows in the pipeline, it will show viscosity, and when the viscosity is too high, it will produce greater internal friction, causing oil heating, and increasing the resistance of oil flow. When the viscosity is too low, it is easy to cause leakage, which will reduce the volumetric efficiency of the system. Therefore, the oil with appropriate viscosity and good viscosity temperature characteristics is generally selected.

AAK hydraulic valve strictly avoid power loss of hydraulic system, everything is customer-centric!

American customer visited 10 manufacturers in 3 days, but no solution. At last, AAK Hydraulic Valve solved the problem

Gabriel is an American hydraulic valve company purchasing in China. In the past 2 years, the purchasing work in China has been smooth. Recently, American company is in urgent need of purchasing a batch of high-precision pilot relief valve products in China. Gabriel visited 10 manufacturers in 3 consecutive days with no gain. After the samples purchased from these manufacturers were tested in the United States, some parameters could not meet the standard always. He was very anxious. Due to the tight delivery date, the US company requested him to find a suitable factory within 15 days. He is constantly looking for manufacturers both online and offline, becoming more and more anxious.

By chance, Gabriel saw an AAK article about the description of inductance micrometer on lathe on Google, so he tried to get in touch with us. The next day Gabriel came to our factory, I took him to visit the whole production workshop, and introduced in detail the working principle and current advantages of the inductance micrometer installed on each lathe.

The inductance micrometer mainly uses the relative displacement of the inductance coil in the side head to display the measured size on the analog meter head or digital meter head through amplification, phase sensitive detection and analog-to-digital conversion. Its accuracy can reach 0.5-1μm. It can measure the size accurately, which other measuring instruments lack. Using the advantage of inductive micrometer, we install it on each lathe, grinder and other mechanical processing equipment to ensure that the diameter, roundness, perpendicularity of each part are displayed in time, and the size of each part is accurate, so as to avoid the poor accuracy of products caused by blade wear and untimely replacement, and reduce the scrap rate of parts.

Gabriel seems to see the hope. When he leaves, he asked us to make proofs according to the drawings in his hand, and hope that we can deliver the samples within 5 days. As for all the expenses arising from proofing, he will bear all the expenses. We feel the importance of this order to Gabriel. The proofers work overtime and deliver the samples on time. 2 weeks later, I suddenly received a call from Gabriel informing us that we could prepare the raw materials in advance, the headquarter is running and official order. After receiving the order, it took 1 month to produce, and we delivered the goods on time.

It has been 45 days since Gabriel's order was delivered. Recently, another re-peat order was placed. After further communication, we know that the American company was very satisfied with the parameters of our AAK Hydraulic valve. They were surprised that our parameters would be more than twice as good as those of other factories. They are very glad to see that the sales in the market are very optimistic and decide to place re-order to have goods on stock ahead of time. Gabriel also said that he was very lucky to meet us and help him solve this big problem. Not only did he successfully retain his job, but the United States also paid more and more attention to Gabriel's ability and promoted him to a purchasing manager, who was fully responsible for the purchasing work in China.

AAK high-precision hydraulic valve, parameters are better than the peer more than 2 times, which quality the peers have not realized.

After inspection failure, Pablo communicated for 6 times and sourced for new factories for 4 days, but no gain. AAK Hydraulic Valve solved his problem with quality goods in 25 days

Pablo is the purchaser of a Spanish hydraulic valve company. He has an hydraulic valve order with early March delivery this year, but problems were found in the spot check 15 days prior to delivery. Some hydraulic valve spool completely stuck, some hydraulic valve spool movement is not smooth. After 6 times of email or telephone communication with the factory, the problem still can not be completely solved. The delivery time is approaching day by day, the finished hydraulic valves can not be shipped, now the factory also has no ability and time to re-produce the hydraulic valves meeting customer quality.

Without a solution, Pablo has to tell customer the situation. Fortunately, the customer can accept 30 days delay shipment. Once bitten, twice shy. Pablo, who had learned a lesson, was extremely cautious and decided to cancel the cooperation with the original manufacturer. It took 4 days for their purchasing team to source a new factory that was 100% satisfied but still failed, Pablo became nervous.

Their QC came across us on the way to the industrial park. QC came to our factory and we tested the hydraulic valve products he brought. We found that the accuracy of the clearance dimension between the spool and the inner hole of the valve body of these hydraulic valves is seriously not enough, and these clearance dimensions are basically within 8 μ m—22 μ M, but our AAK hydraulic valve can reach 8 μ m—14 μ M. If the clearance is too large, the valve core will skew in the valve body, which makes the valve core easy to be stuck. If the clearance between the reverse valve is too small, the friction resistance increases, so that the valve core does not move smoothly. The valves on his hands just have both problems. The QC wanted to take some samples back and happened to pass by the workshop, so we randomly took some of the hydraulic valves that are just in packaging to him, bringing tack to Pablo to see the quality.

5 days later, Pablo sent us an email to confirm the price and delivery date, and hope that we can help to complete it within 30 days. If we can make it earlier, it would be the best. We learned that this order was postponed by his customer without choice. In order to serve his customer well, we arranged the workshop to work overtime, and matched the most skilled technician to operate. 25 days later, shipment is ready and passed inspection one time, guaranteed quality and quantity. Their QC came to our factory to inspect the goods and told us that Pablo got our hydraulic valve samples and did a complete set of parameter tests. He is very satisfied with these parameters and indexes. At the same time, our hydraulic valve does not have the phenomenon of stuck valve and valve core movement not smooth. He is very satisfied with the overall quality of AAK hydraulic valves, especially these samples are taken randomly from large goods.

Yesterday, Pablo said that customers were very satisfied with their purchasing team's ability to deal with the crisis and were ready to place a return order in early May. He is now more and more authoritative in their team and more and more confident in his work.

AAK hydraulic valve never create troubles to customers, buy at ease, use without worry!

With 10 years of hydraulic experience, AAK hydraulic has become the first choice for purchasing by many of the world's top 500 enterprises

In the past 10 years since entering the hydraulic industry, although the process of doing hydraulic is bitter, we have gained the happiness of "doing things that others can't do" and "doing things that others don't want to do" on the way of hydraulic. Although the hydraulic road is difficult, it is never crowded. Now AAK Hydraulic Valve is recognized by many famous hydraulic enterprises, such as Hydra Force, Yuken, Rexroth and so on. On our way to hydraulic, we not only have the guarantee of Swiss numerical control equipment, but also have professional hydraulic team configuration. We strictly control the hydraulic quality, ensure the quality and delivery time, and become the first choice of many of the world's top 500 enterprises. There is no second such hydraulic factory in Ningbo, the "hometown of hydraulic".

Hydra Force is one of the top hydraulic brands in the United States. In 2015, a very occasional meeting, the manager of Hydra Force agency was deeply impressed by AAK's professional hydraulic team and rigorous production attitude. In the era of making fast money, nearly 90% of domestic peers used domestic raw materials to produce products with rough surface, uneven precision and a lot of small problems, such as stuck valve, oil leakage, wear and so on, which seriously affected the performance of products. During visiting AAK workshop, the manager found that not only imported raw materials are used for key components, but also high-precision production equipment is equipped. During the production and before shipping, QC will be arranged for sampling inspection at any time, and the surface of the products produced is smooth, and the accuracy error is controlled within a reasonable range. On the second day of the investigation, the manager resolutely suggested that we should research and develop a cartridge hydraulic valve for Hydra Force. With the mentality of having a try, AAK hydraulic team lived up to the expectations of the public, we changed the materials for 3 times and made 4 proofing tests. After 2 years, our sample successfully passed the parameter test of Hydra Force and reached a cooperation with Hydra Force agency to become the exclusive supplier of its cartridge hydraulic valve.

Since the establishment of AAK industrial hydraulic valve for 10 years, we firmly do not do one-time business, and get 100% high quality customers, nearly none of them changed supplier after using AAK hydraulic valves. Many old customers constantly introduce new customers to us, and there has been no quality return for 8 consecutive years. Such a factory may not have a second one in Ningbo. AAK hydraulic factory not only has high precision CNC lathe imported from Switzerland, but also core materials imported from Korea and Germany. With its own proprietary technology, AAK hydraulic factory carries out hardening treatment on steel surface, such as high-frequency quenching and tempering. The Hydraulic production, to achieve 24-hour operation, reduce the time cost of frequent line change, our hydraulic output is 40% higher than the peers, regular arrangements for QC sampling, to ensure the quality of hydraulic, which is currently 90% of the manufacturers lack.

AAK hydraulic customers not only don't step on the pit, but also spend the same money to buy hydraulic products with better quality, service life and mirror effect. Many customers have been paying attention to our hydraulic system. Later, many customers made money. Why? Whether you've figured out the reason or not, you should call or email AAK hydraulic,

AAK hydraulic valve to ensure the accuracy of the inner hole, and no vibration and noise, Canadian client impressed

The inner hole accuracy of hydraulic valve has always been the uncompromising point of AAK quality control. AAK is not only equipped with high-precision production equipment, but also strictly controls the precision of the die for the inner hole in the early stage. Each batch of hydraulic valves must be debugged for 3 times to ensure the seamless connection between the inner hole and the valve core, and to ensure that the hydraulic valves have no vibration and noise in the later use. In Ningbo, the "hometown of hydraulic valves", there may not be a second factory that is comparable.

Matthew is the buyer of a hydraulic valve company in Canada. He has contacted us many times before, but he is determined to pursue low price, so we have no cooperation till now. Last month, his supplier failed to get sample approved from his customer for 3 times. It is the approval sample for an order over $100,000. The customer mentioned that if the 4^th Hydraulic valve sample still failed, the order would be cancelled. He realized that due to the limitation of technology, the original manufacturer could not be able to get approval from his customer even after making samples for 10 times.

5 days later, still no factory can guarantee that the sample of hydraulic valve can pass at one time. As time went on, Matthew became more and more anxious. He has been following the news on our website. At this time, he feels that maybe AAK hydraulic valve can do it.

We told him that if the accuracy of the inner hole of the hydraulic valve is not enough, the spool of the hydraulic valve will be stuck after a period of use, causing pressure fluctuations, various vibration and noise. At present, it is difficult for many manufacturers to avoid this phenomenon 100%, which is also the reason why the hydraulic valve is prone to failure. In the face of these problems, the vast majority of manufacturers are not thinking about how to solve, but how to shirk responsibility.

Aiming at the problem of his hydraulic valve, after several e-mail communications, Matthew became more and more interested in our quality control. He asked us to arrange make 4 samples of hydraulic valves as soon as possible, according to the customer's design draft. The key point was to avoid vibration, noise and other hydraulic problems. 1 week later, we sent the approval samples of hydraulic valves in time.

After half a month, Matthew decided to transfer the order to us. The sample parameters and debugging of AAK hydraulic valve were within the acceptable error range of the customers. The customers were very surprised by the qualitative change of their 4th hydraulic valve samples, and promised that more and more high-precision hydraulic valve inquires would be sent to their company.

AAK never evades any hydraulic problems, which is also the reason why new and old customers choose to cooperate with us for a long time. If you also have problems with hydraulic valves, please valve at! aakindustry.com

High precision AAK hydraulic valve, no vibration and noise, most of the domestic peers can’t do it or think of it.

3 factories failed to leak free, finally AAK Hydraulic Valve solved the pain point of American customer

Andrew, a senior American purchaser for Hydraulic Valves, has recently ordered hydraulic valves. He visited 3 different hydraulic valve manufacturers in 3 times, but the inner leakage of the hydraulic valve sample is still very serious. The delivery is urgent and he is embattled. This order is for type PC12-00 hydraulic control check valve, but the hydraulic valve samples from these 3 manufacturers all have the problem on the leakage volume, and other technical parameters can meet the requirements. In desperation, Andrew has to source for new hydraulic valve manufacturers.

Andrew checked with all his hydraulic valve suppliers, none of them could reach 3 (drops)/ min@207bar Internal leakage parameters of the system. When hesitating, he happened to see our website AAK Hydraulic Valve on the Internet. After many inquiries, we sent him a similar product with very similar internal leakage parameters.

A week later, Andrew decided to visit our factory. In fact, we didn't hold much hope. It was learned later that after screening, all the indicators of our samples were basically in line with his requirements, and Andrew decided to choose AAK Hydraulic Valve. After visiting the workshop and many communications, we decided to try the sample according to his design draft.

Because his hydraulic valve is very strict in the control of internal leakage, it took us 10 days to proofing this type of one-way valve, which was originally to be finished in 7 days. Fortunately, Andrew was very satisfied with our hydraulic valve samples, and the parameter error of leakage in the hydraulic valve was within the acceptable range, so he signed an order contract with us on the same day, and stressed that delivery must be on time.

AAK Hydraulic Valve strictly control the "leakage", not only use the higher resistance and corrosion resistance fluoro rubber seal ring, but also install inductance measuring instrument on each lathe, grinder and other equipment, so that each part size is accurate, to ensure the accuracy of the hydraulic valve processing, so that users can use it more reassurance.

The word "leakage" is the most sensitive word in the hydraulic valve industry. For consumers, if there is leakage in the products they buy, it will affect the normal operation of the whole hydraulic system, which is the most concerned problem of consumers. However, in order to save costs, some hydraulic valve manufacturers cut corners, although the hydraulic valve did not leak in a short time, after many times of debugging, the leakage is more obvious. Although they have received many complaints from customers, it is difficult for many hydraulic valve manufacturers to make improvements. Due to the price, it has become a chaos in the hydraulic valve industry.

AAK has been on the way to solve the chaos of hydraulic valves. If you also need hydraulic valves, you can contact us at any time: valve at aakindustry com

The filtration accuracy is up to 10 microns. American customer tried AAK Hydraulic Valve and re-ordered half a year later

AAK uses a high-precision filter, which makes the filtration accuracy of hydraulic oil reach 10 microns. In the industry, less than 10% of hydraulic valve manufacturers can achieve this accuracy. After comparison, American customer placed an order for AAK hydraulic valve and re-ordered half a year later.

The size of filtration accuracy will seriously affect the quality of hydraulic oil on the test bench, and then affect the service life of the threaded cartridge hydraulic valve. It has been mentioned before that the quality of oil is the premise of determining the service life of the hydraulic valve. However, nearly 90% of the hydraulic valve manufacturers are using the most conventional filters, and the filtration accuracy can only reach 25 microns, which leads to the failure to guarantee the service life of the hydraulic valve.

Blake, an American Hydraulic customer, usually purchases cartridge valves with a filtration accuracy of 25 microns. Recently, a special customer needs a batch of two position two-way cartridge valves with a filtration accuracy of 10 microns. However, none of his existing hydraulic valve suppliers can meet this requirement. Without choice, Blake had to look for a new manufacturer of hydraulic valve. After many rounds, by chance, Blake contacted us AAK hydraulic valve. We told him that for the control of filtration accuracy, the pore size of the filter element in the filter used by AAK is controlled at 10 μm, the hydraulic oil of the test bench pass through the filter screen before use, and the maximum allowable particle size is 10 μm. Whereas, the conventional hydraulic valve manufacturers are generally in accordance with the domestic standard of 25 μm, so it is very difficult to achieve our current filtration accuracy. The original service life of the hydraulic valve is 2 years, and the AAK hydraulic valve can guarantee at least 3-4 years.

With the mentality of having a try, Blake placed this order to AAK hydraulic valve. It has been more than half a year since the shipment. Today Blake issued a re-order with double quantity. Compared with other hydraulic valves purchased before, those who use AAK hydraulic valves have a very good market response, no stuck valve, no oil leakage, no repair, good stability and long service life.

In order to avoid the impurities in the hydraulic oil affecting the service life of the hydraulic valve, in addition to replacing the detected hydraulic oil regularly, AAK also use high-precision filter to filter the oil, so as to avoid the influence of impurities in the oil on the use of the hydraulic valve and ensure the service life of the product.

AAK hydraulic valve, good stability and long service life, you also try a small order?

Gerrard is one of our Spanish hydraulic valve customers. Recently, he needs to purchase a batch of hydraulic valves with very high precision requirements, mainly for the hydraulic system of cranes. He visited no less than 10 hydraulic valve manufacturers, but found none of them is able to make the hydraulic valve with inner hole accuracy error within +/- 1μm. Then this Spanish customer visited AAK Hydraulic Valve, and signed an order of US$40,000 for hydraulic valve.

After visiting a hydraulic valve factory in Ningbo called Ketai, a technical staff inside mentioned to him that to reach this 1 μM error of the inner hole accuracy requirements of the hydraulic valve, you may need to go to AAK Hydraulic Valve, they just bought a honing machine imported from the United States, for the 1μm accuracy error of the inner hole, they may be able to do it. Gerrard is some in doubt about this and got AAK Hydraulic Valve address and contact information from that staff.

Honing machine is a kind of grinding machine which has higher requirements on the accuracy of inner hole machining. It can guarantee the accuracy control of inner hole of hydraulic valve. At present, few hydraulic valves have such high accuracy requirements, so less than 5% of domestic manufacturers will choose to equip with honing machines made in the United States to produce hydraulic valves.

The next morning, we received an email from Gerrard, he wanted to visit our hydraulic valve factory. After knowing his requirements about the hydraulic valve, we welcomed him to visit our workshop. In the production workshop, we introduced him the performance and parameters of some machines in detail. At the same time, he also looked at the whole operation process of honing machine carefully. Finally, Gerrard asked if we could control the accuracy error of the inner hole of the hydraulic valve within +/- 1μm. Because we haven't done such a hydraulic valve before, we can't guarantee it and can only analyze the specific products. Before leaving, Gerrard asked us to make hydraulic valve samples according to his design drawings, with special emphasis on the accuracy error of the inner hole of the hydraulic valve within 1μm.

After 15 days of sending out the sample of hydraulic valve, Gerrard signed a purchase contract for hydraulic valve with us for US$40,000. Now it has been 3 months since the shipment, out of my expectation, we received a re-order of hydraulic valves today. According to his email, the sales of these valves are getting better and better, and it is expected to re-peat the order 4-6 times a year. At the same time, we also received several design drafts of high precision hydraulic valves from his company.

AAK high precision hydraulic valve, customers have no better choice elsewhere, you should also try an order.

The quality of sun series hydraulic valve produced by AAK is comparable to that of sun hydraulic valve produced in the United States, and has successfully won the famous German industrial hydraulic customer

The German customer who has used the American brand Sun series hydraulic valve for 5 years, after comparing over 10 Hydraulic valve manufacturers in China, decided to use the Sun series hydraulic valve produced by AAK instead of the Sun hydraulic valve produced in the United States, because the quality produced by AAK is the same as that of Sun brand, but the price is only half of that produced in the United States, this becomes the irresistible reason for famous German industrial hydraulic valve customer to choose AAK.

In recent years, many bosses are optimistic about the hydraulic valve industry, and 3 or 4 hundred hydraulic factories have been born at once. However, most of the factories start late and are not large-scale. Many small factories fight a price war in order to survive. There is on lowest price, only lower. The quality of the sun hydraulic valve produced by them is worrying.

In September 2018, we received an inquiry from a German hydraulic valve customer. The Sun hydraulic valve that they have purchased from the United States for 5 years, is really good quality, but the price of hydraulic valve is relatively high. They are very eager to find a supplier who can produce the sun hydraulic valve with comparable quality in China.

After getting the sun hydraulic valve samples produced in the United States, we AAK technology research and development department adjusted the production equipment and raw materials within 7 days, strictly controlled the product accuracy, and sent the samples within 1 week. In several months, the customer tested and compared the sun series hydraulic valves made by over 10 suppliers in China at the same time, of which 2 met the quality standard. However, the sun series hydraulic valves produced by AAK not only met the quality standard, but also had a price only half of that produced in the United States. The German customer finally decided to purchase the sun series hydraulic valves produced by AAK.

AAK hydraulic valve, founded 12 years ago, has been focusing on the world, making the hydraulic valve for global market and benchmarking the quality of hydraulic valve with the international first-line brand. As mentioned before, we don't compete with our peers in the low-end market. We only compete with our peers for high-end hydraulic valve customers who have requirements for quality.

AAK hydraulic valve can get the trust of German customer, the main advantages are as follows:

1. The core raw materials of AAK hydraulic valve are 100% imported and equipped with advanced Swiss CNC lathe. The accuracy of the hydraulic valve is 30% higher than our peers.

2. To be able to produce high-precision hydraulic valves used in "aircraft", most of our peers can’t expect it, and unable to do it neither.

3. At present, AAK has 3 domestic design patents, 4 proprietary processing technologies and processes, while 80% of our peers can only produce conventional hydraulic valves.

The quality of sun hydraulic valve produced by AAK is in line with the international first-line brand, which has successfully replaced the sun hydraulic valve produced in the United States. However, the price of our hydraulic valve is only half of that of sun, so it's real good price and quality to choose AAK hydraulic valve.

The filtration accuracy reaches 10%μM hydraulic valve, Dutch customer can’t buy it anywhere else except AAK

Patrick is a hydraulic valve customer in Holland. He has very high requirements for hydraulic parameters. Recently, he needed to purchase a batch of cartridge valves with hydraulic filtration accuracy of 10 microns. He contacted no less than 20 hydraulic valve manufacturers, but no factory dares to accept this order. As the sales season approaches, the hydraulic valve factory has not been approved yet, he became anxious but also a little disheartened, while he was full of confidence in this hydraulic valve order at the beginning.

In recent years, many hydraulic valve manufacturers are used to making hydraulic valve orders from domestic main engine factories, and they don't pay much attention to many foreign trade hydraulic valve orders. The main engine factories have a large demand for hydraulic valves and a low threshold, which has become the "hot spot" of most manufacturers. This leads to a problem that it is difficult for foreign customers to find suitable manufacturers for the orders with high precision requirements.

Patrick contacted AAK through the introduction of his friends and kept asking questions about the parameters of the hydraulic valve. We also deliberately emphasized the control index of the filtration accuracy and replied to the technical questions with strong professionalism, which made him feel that maybe AAK hydraulic valve can meet the requirements of his hydraulic pressure parameters.

The next day, we received Patrick's drawings with detailed information and were requested to make samples. The email repeatedly mentioned the requirement of 10 microns filtration accuracy of hydraulic valve. To dispel his worries, we introduced the use principle of high-precision filter in detail. The pore diameter of filter element in the filter used by AAK can be controlled within 10μm. The hydraulic oil of the test bench is screened by the filter screen before use, and the maximum particle allowed to pass is 10μm.

90% of the conventional hydraulic valve manufacturers generally produce the hydraulic valve per the domestic standard of 25μm. The filtration accuracy can only reach 25 microns, which is too difficult to meet our current filtration standard. Therefore, the service life of these hydraulic valves is about 2 years. According to our production process, AAK hydraulic valve can guarantee 3-4 years, which is almost twice as long as the service life of the hydraulic valve in the same industry.

We sent out the samples in a week. After half a month of testing and comparison, Patrick finally chose to place an order with AAK. It has been more than 2 months since the delivery. Patrick emailed us that the sales volume of this hydraulic valve is very good. It is expected to re-peat the order in the near future and he will also develop a series of hydraulic valve products with the requirements of 10microns filtration precision.

To improve the filtration accuracy and ensure the service life of hydraulic valve products, AAK makes a standard that 90% of the peers can’t reach. Welcome to try an order with AAK.

AAK is equipped with American honing machine to ensure the accuracy of inner hole of hydraulic valve comparable to Japan equipment factory

Abe is a purchaser of a Japanese oil research hydraulic company. In the past we contacted him for several times via the exhibition in Shanghai, but because of his worry about the hydraulic accuracy, we have never had the opportunity to cooperate with him. In April this year, Abe had an order for hydraulic parts with a value of 130,000 US dollars. The inner hole accuracy of this part needs to reach +/- 1 μM error, but his supplier can not get the samples approved by his customer even after 4 proofing. His customer only give him the last chance to adjust the sample, if the sample still can not meet the parameter standard, order has to be cancelled. He realized that due to technological limitations, the original manufacturer could not meet the customer's standard even if trying another 20 adjustments.

7 days later, no factory can ensure that the precision of the inner hole can be controlled within 1 μ M. With time passing by, the promised sample sending date is getting closer and closer, Abe is also more and more anxious. By chance, he saw our News and Events on the Internet. Based on previous contacts, he saw a glimmer of hope this time.

After receiving his email, we directly told him that we had just purchased a honing machine imported from the United States, there is no problem to control the inner hole of the hydraulic valve within the accuracy of 1μm. 2 weeks ago, a Spanish hydraulic valve customer had already been convinced. Half an hour later, Abe sent us the design draft of the hydraulic valve, and asked us to make a sample immediately very carefully according to the parameters of the hydraulic valve. We feel the importance he attaches to this sample. On the same day, we arranged the customized material and studied the design draft, and told him that the hydraulic valve sample can be sent in 7 days.

20 days after sending the sample of hydraulic valve, Abe signed this order contract with us. We were advised that after many parameter tests, the customer was very satisfied with the accuracy of our AAK products, it is within the acceptable error range, the gloss of the product surface was much better than that of the previous manufacturers.

His customer is very satisfied that they can quickly complete this high-precision hydraulic valve, and told that the market sales must be very good. At the same time, it is promised that the future oil research hydraulic orders will be placed with AAK gradually.

Honing machine is a kind of grinding machine which has higher requirements on the accuracy of inner hole machining. It can guarantee the accuracy control of inner hole of hydraulic valve. At present, few hydraulic valves have such high accuracy requirements, so less than 5% of domestic manufacturers will be equipped with American honing machine to produce hydraulic valves.

AAK hydraulic valve accuracy convinced the Japanese equipment manufacturers. You can also have a try. Email: valve aakindustry com

With 12 years of observation, AAK talk about the current hydraulic valve industry and compare the differences between the superior and inferior factories

In a chat with an American hydraulic valve customer some time ago, he mentioned that the current hydraulic industry in China really scared him, and it was difficult to find a hydraulic valve factory that made him really reassured. Some factories are good in quality, but the overall service awareness is too bad. Some factories have very good approval samples of hydraulic valves, but you are greatly surprised by the shipment goods. I said with a smile that each industry has its own happiness and misfortune. The core is to find a hydraulic valve factory with a positive mind and then he can treat you sincerely so that you can be relieved.

Let's talk about the current situation of the domestic hydraulic valve industry. I hope it can be a little helpful to the customers who need it. 90% of the factories only make conventional hydraulic valves according to their own ideas, basically without the stability and safety awareness of industrial products, and lack the spirit of craftsman. Their only purpose is to pursue the maximum profit, which is mainly reflected in the following aspects:

Material - use easy cutting, low loss of domestic 1214 steel for the valve sleeve, valve core, easy to cause hydraulic valve deformation, oil leakage; use carbon steel for the pressure spring, the recovery of spring is weakened, which easily affects the adjustment of hydraulic valve.

Production process - try to save the process and speed up the production. Regarding the size of the gap between the components is too large or too small, they do not very care. As long as the components can be assembled, they are almost regarded as the finished products for the shipment. No testing, assemble and use directly, then the hydraulic valves are easy to leak pressure and oil.

Accuracy - the most basic accuracy of the roughness of the mounting surface of the hydraulic valve is not stable within the standard range, the sealing of the hydraulic valve is weakened, and it is easy to leak. The clearance dimensions between the valve core and the inner hole of the valve body of the hydraulic valve are basically within 8 μm—22 μm. In this range, the hydraulic valve core is easy to be completely stuck. Due to limited equipment, they do not dare to think about the accuracy requirements, not mention to do.

Quality - the product is directly packaged and shipped without pressure test. They do not test the steel, or even do not do heat treatment, just have a superficial knowledge of the toughness, plasticity, fatigue resistance, hardenability, wear resistance and other comprehensive mechanical properties.

Certainly, there are also a few factories, such as we AAK Hydraulic Valve, is mainly positioned to do hydraulic valves for high re-buy rate, long-term business and high-end customers. Our purpose is to do a business, let customers receive sincere, let customers make more money than their peers, focus on the customer's re-buy rate, and make ourselves become the evergreen tree of the hydraulic valve industry. Thus, we have our own standards and requirements:

Equipment - lathes imported from Switzerland, honing machines imported from the United States, equipped with inductance measuring instruments to guarantee the accuracy.

Material – 100% imported material for core components. Each material is 100% tested and 100% heat treatment.

Production Process - Each batch of hydraulic valves must be debugged for 3 times to ensure the seamless connection between the inner hole and the valve core. Each finished product has been tested by the test bench and checked by a professional tester with 7 years' experience.

Quality - No re-buy is a failure. Adhere sincerity to the customer, adhere mindfulness to the quality.

I hope the above can help you. If you have any questions later, please contact us via email valveataakindustrycom

AAK hydraulic valve filtration accuracy reaches 10μm, it is over 2 times higher than peers, and service life is also 2 years longer

25μm is the conventional index that most domestic hydraulic valve manufacturers can achieve. AAK uses a high-precision filter, so that the filtering accuracy of hydraulic oil can reach 10μm. It's 2 times higher than the peers. For the hydraulic valve with high precision and higher requirements, nearly 90% of the hydraulic valve manufacturers can do nothing.

The filtration accuracy of hydraulic valve will seriously affect the service life of hydraulic valve. The larger the filtration accuracy is, the larger the size of the impurity particles of the hydraulic oil passing through the internal filter of the filter will be, which will increase the friction resistance of the valve core and shorten the service life of the hydraulic valve. 90% of the hydraulic valve manufacturers use the most conventional filters with a filtration accuracy of 25μm, so the life of hydraulic valve becomes an uncertain problem.

Thomas is a purchaser of an Italian hydraulic valve company, and has been cooperating with us since 2019. The first hydraulic valve order he placed to us is still fresh in his memory. Every time when he chatted with us, he mentioned these interesting things. His customer needed a hydraulic valve with filtration accuracy of 10μM, he sent inquiries to over 10 factories, and communicated via emails over and over again in 3 days, and finally gained nothing.

Only when I received his email, I knew that one of our Italian hydraulic valve customers introduced us to him that maybe AAK Hydraulic Valve can solve this problem. We told him that 3 years ago, a German customer had already purchased the hydraulic valve with 10μM filter precision, until now he has been ordering from AAK.

Thomas received our reply and asked us to proofing according to his design draft first. 15 days after sending the sample, Thomas called us to express his surprise and joy, and asked us to prepare the material. The first order for hydraulic valve will be sent to us in the next few days. Upon receipt of sample of hydraulic valve, he tested and compared the samples in half a month. The hydraulic parameters of AAK sample is significantly higher than those of other peers, especially the filtration accuracy is over 2 times higher than that of peers. His customer is very shocked and satisfied.

Thomas wanted to know how we achieved it. Thanks to the German customer a few years ago, after more than 2 months of debugging, we improved the process on the sample, adjusted the parameters of the equipment, configured a high-precision filter with AAK special hydraulic oil, then we can control the filtration accuracy of particles in the hydraulic oil up to 10μm. Under the same working conditions, if the hydraulic valve of the peers has a service life of 2 years, the service life of AAK hydraulic valve can be extended to 3-4 years.

If you can't find a suitable hydraulic valve manufacturer, you may contact AAK Hydraulic Valve valve at aakindustry com

Bruce contacted 15 factories but gained nothing, finally AAK met his requirements for the high precision hydraulic sequence valve

Today, we received the third order from Bruce team. Bruce is the purchaser of a French hydraulic valve company. Last August, he had orders for several types of sequence valves. Because the accuracy requirements of sequence valve are very high, in Zhenhai, Ningbo, the hometown of hydraulic valve, he checked with no less than 15 factories, but the parameters of their hydraulic valve can not meet the requirements. He selected 3 hydraulic valve factories who has the parameters closest to the requirements. However, the samples of these sequence valves are either of different quality, or can not pass the parameter test. It took him more than 40 days, but none of the factories can reassure him.

He was frustrated. In Mid-September, he saw our website www.aakindustry.com by chance. With doubt, he emailed us to ask about the parameters of the hydraulic valve. After a few rounds of email communication, he felt that maybe AAK hydraulic valve could do it. Later, he sent a detailed drawing of the sequence valve, with every detail of the sequence valve, the media, and the use scenarios. He also asked us to make samples. It was the first time for us to see such detailed drawing of hydraulic valve.

After receiving the sample of AAK sequence valve, Bruce team spent 15 days on testing and comparing the samples. The test results gave their team hope, all the parameters meet the standard, but the tightness of the sequence valve is still a little uneasy. They asked if AAK can still make improvements. We were also a little surprised that there was a problem with the sealing performance, because no guest has ever complained about the sealing performance of the AAK hydraulic valve. After doing many tests on the samples we kept on hand, we found that the NBR seal ring is not suitable for this kind of sequence valve. After 3 trials, it is determined that the fluororubber seal ring is the perfect match for this sequence valve. After they received revised samples of AAK sequence valve, we received the order for this series of sequence valve from Bruce within 1 week.

Many factories can do sequence valve, but few hydraulic valve factories can really meet the requirements of some special customers for the high-precision hydraulic quality. Many hydraulic valve manufacturers simplified the production process, leading to uneven quality, it is basically a one-time business. Coincidentally, in recent years, we AAK Hydraulic Valve, with guaranteed quality and quantity, the spirit of craftsmen to overcome difficulties, and the sincere service details, has been 100% recognized by our customers. Many old customers have constantly introduced new customers to us. For 8 consecutive years, there has been no quality return. Perhaps there is no second factory like this in Ningbo.

AAK hydraulic factory is not only equipped with high precision CNC lathe imported from Switzerland, but also import the core materials from South Korea and Germany, with our own proprietary hydraulic technology, never cutting corners, quality control is more QC than the customer's QC, AAK hydraulic valve, it worth you a try for purchasing.

AAK mass produced a hydraulic throttle valve 3 years ago that peers are still not able to do, pleasantly surprised a Russian customer

Vadali is the purchasing manager of a hydraulic valve company in Russia. Some time ago, he wanted to purchase a hydraulic throttle valve with the internal leakage parameters within 3 (drops)/ min@207bar. It took more than 10 days, but the throttle valve samples provided by his hydraulic valve supplier failed to meet the test parameters. He did not know that AAK mass produced this type of hydraulic throttle valve 3 years ago, so it is not difficult for us and our sample is approved 15 days after it was sent.

He contacted some hydraulic valve manufacturers from the Internet, because he never cooperated with them and was a little concerned. When hesitating, a buyer in his team suggested contacting AAK to have a try: AAK Hydraulic Valve is a powerful manufacturer for hydraulic industry in Ningbo and is trustworthy. You can go to their website for a review and then decide whether it is worth a test with AAK Hydraulic Valve.

After reviewing our website www.aakindustry.com, Vadali posted a message on our website. After several rounds of interaction, he asked us to check his email after 2 hours. We were requested to spend 2 hours to research his hydraulic throttle valve drawing carefully. Then he also wanted to communicate with our technical staff. It was the first time that we met a Russian customer that is so cautious. Maybe he had been in troubles for many times in the past with the other suppliers.

In the video conference, Vadali explained the requirements of every detail to the product in the drawing, and reminded the difficult points. At the same time, he repeatedly emphasized that the internal leakage parameters of the hydraulic throttle valve must meet the standard of 3 (drops)/ min@207bar. We asked him what scene the hydraulic throttle valve would be used in. When he learned that we shipped several shipments of similar hydraulic throttle valve to Italy in 2018, he seemed to relax instantly and ended the meeting with a sentence "I'll be waiting for your approval sample for this throttle valve. "

15 days after the samples were sent, we received email from Vadali that our hydraulic throttle valve samples meet the standard of 3 (drops)/ min@207bar, and the overall quality of AAK hydraulic throttle valve is also satisfying. He was curious how we achieved it?

The internal leakage of hydraulic valves has always been the important index of AAK quality control. According to different scenarios of hydraulic valves, the sealing ring with higher anti-aging and stronger corrosion resistance is selected. In addition, inductance measuring instrument is installed on every lathe, grinder and other equipment to make sure that each part is in accurate size, then the machining accuracy of hydraulic valve is guaranteed.

Why does AAK hydraulic throttle valve is better than its peers?

1. The core raw materials of AAK Hydraulic Valve are 100% imported, and advanced Swiss CNC lathes are equipped. The accuracy of AAK hydraulic valve is 30% higher than its peers.

2. AAK is able to produce high-precision hydraulic valves used in "aircraft", most of our peers can not think about it and are also not able to do it.

3. At present, AAK has 3 domestic design patents, 4 proprietary processing technologies and processes, and 80% of our peers can only produce conventional hydraulic valves.

No need to have any worry about the internal leakage of hydraulic throttle valve produced by AAK, welcome to try an order!

The roundness error of sealing oil surface is only half of the peers, Russian client selected AAK hydraulic flow valve after two rounds of comparison

After being used for a period of time, the hydraulic flow valve will scream, which is a common problem in the domestic hydraulic valve industry, also a pain point. Has this pain point been solved? It's solved. Who solved it? AAK Hydraulic Valve. The roundness error of sealing oil surface of AAK hydraulic flow valve is twice as small as that of its peers, Russian client can't refuse and have to choose AAK hydraulic flow valve.

In recent years, many manufacturers have been fighting a price war for survival. For hydraulic flow valves with the same price, there are problems such as valve stuck, oil leakage and even scream in the process of use. These problems do not happen to flow valves from only 1 or 2 manufacturers, but almost a common phenomenon in the hydraulic valve industry.

In April this year, we received an inquiry from a Russian customer about the hydraulic flow valve. From the customs data, we knew that this customer has been purchasing hydraulic flow valves from China for more than 4 years. We did not quote in a hurry. After several rounds of email communication, we finally knew why he wants to find a new supplier.

The hydraulic valves he purchased in the past, after being used for a period of time, there would be a scream. Although the previous supplier was very cooperative to improve, the scream of the hydraulic flow valve still exists, just that the probability of a scream to happen is reduced. Due to technique limitation, the problem can not be solved completely, he has to source another manufacturer who can produce the hydraulic flow valve and the hydraulic flow valve will not scream in the use.

He contacted with over 10 hydraulic valve manufacturers in different areas of China. After several rounds of communication, he selected 5 factories to have a second comparison. AAK Hydraulic Valve and the other 4 factories received the same drawing for a hydraulic flow valve, and were requested to offer samples and quotes for this hydraulic flow valve in 15 days.

AAK sent quotes and samples of the hydraulic flow valve in the requested time frame, and also reminded the customer that the main reason for the scream of the hydraulic flow valve is the roundness error of the sealing oil surface of the hydraulic valve.

If the size error of the sealing surface is too large, the force of the pressure regulating spring will be unbalanced, and the oscillation of the poppet valve will be intensified, resulting in scream phenomenon. The smaller the error size, the better. In the detection of hydraulic valve parameters, this size can be measured pertinently.

A month later, we didn't hear any news from this customer. We thought we were out from the competition. Last week, we received his inquiry unexpectedly. At the same time, he also told us the result of the comparison among the 5 hydraulic valve factories in the second round. He was very satisfied with the regular parameters of the hydraulic flow valves from all 5 factories. In the aspect of roundness error of sealing oil surface, the size error of 2 factories was 0.005-0.01mm, and 0.011-0.02mm from the other 3 factories. AAK hydraulic flow valve is one of those 2 factories. The reason why he finally chose AAK for cooperation lies in our kind reminder before sending samples. He saw our wholehearted treatment to him herein.

Why does AAK hydraulic flow valve is better than its peers?

1) AAK is equipped with honing machine imported from the United States and the inductance measuring instrument. The accuracy error of inner hole is controlled within +/-1 μm, the accuracy is guaranteed.

2) Core components, 100% imported materials; Each material, 100% testing, 100% heat treatment.

3) No re-buy means a failure for us. AAK adhere to sincerity to customers, adhere to mindfulness to quality.

AAK is a factory which is addicted to quality, facing the global hydraulic valve market, keeping pace with the international first-line brands, accurately controlling the error range and ensuring product quality.

If you have requirements on quality, do not hesitate to contact AAK Hydraulic Valve: valve AT aakindustry.com

After comparing the hole accuracy of 10 hydraulic valve factories, the American customer finally placed order with AAK

The surface roughness of AAK hydraulic valve is ra 0.8-1.6, the geometric accuracy is higher than 0.005mm, and the processing component size can reach the accuracy of grade 6. After comparing 10 domestic manufacturers, American customer finally chose to place order with AAK.

Now many hydraulic valve manufacturers, due to without enough knowledge about the production process and corresponding equipment, the parameters of the hydraulic valves they produced are uneven. Most manufacturers use the traditional production process: expanding - boring - boring - reaming - grinding, which is the most widely used production process and generally suitable for large size blank shapes. However, there are many factories using this technology in the process of valve hole processing, which inevitably leads to the insufficient accuracy of the valve hole of the hydraulic valve. What's more, it is difficult to find this accuracy problem in the later stage.

The dimensional accuracy, geometric accuracy and surface roughness of valve hole are the main factors affecting the product quality. How to ensure the accuracy of the product? It is very necessary to master the reasonable technological essentials. Reasonable process plan is based on the usage scenarios of hydraulic valve, flow medium, accuracy requirements, blank shape condition, component material, length diameter ratio, equipment conditions, master skill and other relevant factors, rather than mechanically produce the hydraulic valve per the parameters singly.

Some time ago, we received an inquiry from an American customer about a hydraulic pressure control valve. The parameters require that the clearance between the valve hole and the valve body of the hydraulic pressure control valve is 0.005-0.015mm, the working pressure of the hydraulic pressure control valve is 21-35Mpa, the diameter of the valve hole is generally 10-41mm, the length of the valve body is 70-300mm, the length diameter ratio is maximum 11:1, and the hole dimension precision of the hydraulic pressure control valve is H6-H7, the cylinder is required to be 0.003-0.005mm, and the surface roughness is Ra 0.2.

5 days after the quotation, the customer asked us to make sample according to the parameters of his hydraulic pressure control valve and was willing to pay the sample fee. After 10 days, we sent the approval sample of the hydraulic pressure control valve. In 1 month, the customer tested and compared the samples from 10 Chinese hydraulic valve suppliers at the same time, and finally chose AAK Hydraulic Valve to place the order.

AAK adopts mature processing technology: reaming - rigid reaming - rigid reaming - Diamond reaming, which has good stability. After reaming, the hydraulic pressure control valve hole is semi-finished by rigid reaming, and then honed by diamond reamer. Rigid boring and reaming cutter with guide ensures the straightness of the component. In addition to internal cooling and chip removal, the processing condition is greatly improved and the high surface finish is guaranteed. At the same time, after reaming, the surface roughness is Ra 0.8 ~ 1.6, the geometric accuracy is higher than 0.005mm, and the component size accuracy can reach grade 6. Diamond reaming is a relatively new technology, but it has been widely used in our factory. As a final machining process, it plays a very important role in controlling the dimensional accuracy.

To ensure the hole accuracy of hydraulic pressure control valve, we need to choose a reasonable processing method according to the specific products, not apply mechanically, which is the production attitude of AAK all the time. Choose AAK hydraulic pressure control valve to ensure your accuracy!

5 Manufacturing Processes of AAK Hydraulic Valve Block, 5 Parameters Ahead of Peers Not Only 5 Steps

AAK hydraulic valve block is manufactured strictly in accordance with AAK's own 5 processing procedures to ensure at least 7H screw hole machining accuracy requirements; the roughness of mounting hole should be at least Ra0.8; the geometric tolerance is 0.005-0.01MM at most; the surface roughness of 0-ring groove is at least Ra3.2, and the surface roughness of flow channel is at least Ra12.5.

The importance of hydraulic valve block in hydraulic system has been recognized by more and more people, and its application scope is more and more extensive. The use of hydraulic valve block can not only simplify the design and installation of hydraulic system, but also facilitate the integration and standardization of hydraulic system, reduce the manufacturing cost and improve the accuracy and reliability.

However, with the increase of complexity of hydraulic system and difficulty of the design of hydraulic valve block, it also causes a series of problems, such as the raise of complexity of manufacturing process, the increase of processing cost and so on. Today, we will learn about the manufacturing process of AAK hydraulic valve block through the following introduction:

1) Pretreatment. The material used for valve block progressing should be compact in internal structure, free from interlayer, trachoma and other defects. If necessary, the roughcast should be detected for defects. Cast iron blocks and larger steel blocks should go through aging treatment and pretreatment before processing.

2) Machining. After rough machining such as milling and planning the valve block roughcast, bench workers use scriber to mark lines, the allowance for final fine grinding should be reserved. The surface roughness of valve block must meet the design requirements, especially the installation surface of hydraulic valve, flange and pipe joint, which should be free of marking marks and other defects, otherwise leakage will be caused.

3) Deburring. After the machining of valve block, it is necessary to chamfering and deburring. All flow channels in the valve block, especially the intersection of intersecting flow channels, must be thoroughly deburred, which is closely related to the reliability of the whole hydraulic system, hence must not be ignored.

4) Cleaning. The valve block must be thoroughly cleaned before assembly, and special cleaning equipment should be set. The cleaning fluid should be antirust cleaning fluid, kerosene or engine oil is also OK. When flushing, it is better to have a certain pressure. All flow channels, especially blind holes, must be cleaned without any iron filings, dirt and debris. After cleaning, the valve block should be assembled immediately, otherwise it should be coated with anti rust oil. Besides, the oil port should be covered to prevent corrosion and secondary pollution.

5) Assembly. Before assembling the valve block, check again whether the connection of the orifice is consistent with the schematic diagram, check all the components and parts to be assembled, and ensure that the assembled components, seals and other parts are qualified products. The screw plug on the valve block should be sealed with anaerobic glue. Before using the anaerobic glue, the oil dirt on the joint surface must be removed. After gluing, the screw plug must be tightened. Oil can only be filled after 24 hours.

All screw holes on AAK hydraulic valve block should have machining accuracy requirements, generally 7H, or customized according to customers. The machining accuracy of screw cartridge valve mounting holes should meet the requirements of product samples, and the roughness of cartridge valve mounting holes is Ra0.8. In addition, there are also dimensional tolerance and geometric tolerance requirements. The surface roughness of 0-ring groove is Ra3.2, and surface roughness of general runner is Ra12.5.

Those are detailed manufacturing processes of AAK hydraulic valve block. Why are you hesitating? Come to order and have a try!

AAK Hydraulic Valve Block 4 Processing Features, Peers may think of it but not Do it

After the previous article talking about the manufacturing process of hydraulic valve block, we received many customers' message on our website. The new customers have not purchased our AAK hydraulic valve block yet, so it is understandable to have worries. In order to further clarify the quality advantages of AAK hydraulic valve block, I will talk about some production precautions of AAK in the production process of hydraulic valve block, as follows:

1. The surface roughness of the valve and flange installed on the hydraulic valve block shall reach Ra0.4, and the surface roughness of the sealing surface of the end pipe joint shall reach Ra3.2. In addition, the tolerance of perpendicularity between the screw hole of pipe joint and its outer joint surface shall be at least Grade 8.

2. In the design of hydraulic valve block, the oil circuit should be as simple as possible, and the deep hole, inclined hole and process hole should be reduced as far as possible. The hole diameter in the valve block should match with the flow rate, especially the through hole must have enough flow area, the direction and position of the oil inlet and outlet should match with the general layout of the system and the connection form of the pipeline, and the process of installation operation should be considered. The components with vertical or horizontal installation requirements must meet the requirements after installation.

3. All screw holes on the valve block should have machining accuracy requirements. Generally, 7h is selected. The machining accuracy of the mounting holes of threaded cartridge valves meets the requirements of product samples. The roughness of the mounting holes of cartridge valves is Ra0.8. In addition, there are also dimensional tolerance and geometric tolerance requirements. The surface roughness of 0-ring groove is Ra3.2, and the surface roughness of general runner is Ra12.5.

4. The high pressure valve block should be made of 35 forged steel, and the general valve block should be made of A3 steel or ductile iron. When cutting the valve block material from the plate by gas cutting, enough machining allowance should be reserved, and it is better to forge the blank of the valve block before machining. The material for processing valve block shall be compact in internal structure, free from interlayer, trachoma and other defects, and the blank shall be detected if necessary. Cast iron blocks and larger steel blocks should be aged and pretreated before processing.

The important component of the hydraulic valve is the hydraulic valve block, which plays an important role in controlling the direction, pressure and flow of the liquid flow in the hydraulic valve. AAK has its own proprietary technology, quality control system, never careless. If you also need to purchase hydraulic valve block, please contact us, email: valve aakindustry com

The spool of AAK hydraulic valve is made of high-grade tool steel with special heat treatment process. The hardness of the spool can reach 65HRC, which is even 7HRC higher than the 58HRC high-quality of the peers. Carson spent more than 2 months in making samples with 7 hydraulic valve factories. The hydraulic flow valves he got were all below 54HRC, while the hardness of AAK valve spool was 65hrc, which solved his urgent need.

At present, the hardness processing for precision parts from many hydraulic valve counterparts can not reach the high index. It seems to be qualified for domestic market, but far away from the high requirements of hydraulic valve products exported to overseas. First of all, these hydraulic valve factories do not have professional and systematic knowledge about how to choose the most suitable alloy steel material. Then, most importantly, the heat treatment is led by the processing plant, because the heat treatment is outsourcing processing, and 20% of the factory changes the processing plant every time, so the hardness can not be guaranteed, not to mention stability. Because of these common faults in the industry, the spool of hydraulic valve shows the problems of easy deformation, fast wear and so on after being used for a period of time.

Carson, a new customer of hydraulic valves in the United States, left a message on our website www.aakindustry.com at the end of 2020. We have been in a continuous interaction, but never had the opportunity to cooperate. Last month, he has an order for a hydraulic flow valve. His customer had a specific requirement of 64HRC for the hardness of the valve spool. He spent more than 2 months with 7 suppliers to make samples, but the hardness of the spool of the hydraulic flow valve still couldn't pass the test. These suppliers of hydraulic flow valve adjusted the material for many times, but the hardness of the valve spool could not meet the standard.

With the delivery date approaching, Carson was very worried. He asked us by email if we could make a hydraulic flow valve, and the specific hardness requirement of the valve spool is 64HRC. With so many years of experience in hydraulic valve export, AAK is more and more strict in controlling every detail. Especially in the processing of valve spool, the technology is becoming more and more mature.

For the material selection of the valve spool, we need to select the most suitable steel according to the use scene of the hydraulic valve, the medium used, and the customer's hydraulic parameters, combined with the wear resistance, linear expansion coefficient, deformation of different steels. The high grade tool steels like Cr12MoV, 12CrNi3A, 18crniwa and GCr15 are what we commonly choose.

In the hardness control of the valve spool of the hydraulic flow valve, the last and most important step is the heat treatment process of steel. If the hardness needs to be above 64HRC, the carbon content of steel should be considered first, and then find a way in heat treatment. Steels with different contents need different heat treatment methods in quenching, carburizing and nitriding. Pretreatment, quenching, cold treatment, tempering, aging, fine processing, secondary aging, aging temperature and holding time of these processes are the key. We can achieve the aging temperature of 420 ℃ and heat preservation for more than 10h, and we can obtain hardness of 65HRC or more, which is beyond the imagination and ability of our peers.

After 15 days of design and proofing, AAK successfully sent the hydraulic flow control valve to Carson. Within 7 days after receiving the flow hydraulic valve sample, he placed an order of 1 million hydraulic flow control valves with AAK, because the spool hardness of our hydraulic flow valve sample reaches 65HRC.

AAK Hydraulic Valve is able to solve the urgent needs of new and old customers, because of the picky attitude on technology of all AAK staff. Welcome to try an order!

The quality of the valve spool can only be measured and compared from the 4 main aspects: the movement sensitivity, stability, no leakage and long service life of the spool in the valve body. The 6 processing procedures and 6 parameters of AAK valve spool also impressed Russian customers.

At present, some of the valve spools used by the hydraulic valve manufacturers are purchased outside from the valve spool factory, which is the common market goods well known in the hydraulic valve industry, with high output and low price. There are also hydraulic valve manufacturers that produce valve spools themselves, but the workshop only produces and tests according to the process sheet of the production department, and basically does not consider the type of hydraulic valve, hydraulic force on the valve spool, flow coefficient of the valve spool, pressure and flow characteristics, service scenarios of the hydraulic valve, and media. That is to use the same production standard to produce all different types of valve spools.

Boris from Russia is mainly responsible for purchasing high-end hydraulic valves, and some requirements are jokingly called curiosity by peers. Due to restriction of production process or lack of awareness of quality control, many hydraulic valve manufacturers dare not accept his orders. Just last month, our old customer, Erin, brought Boris to our company. I was surprised at the moment we met. Maybe he was really worried and went straight to the subject, there was an order for hydraulic flow valve that couldn't pass the inspection, and then took out 5 samples of hydraulic flow valve.

We conducted simulation tests according to the service scenarios, media and parameter requirements of the flow valve provided by him. The test results of the flow valve are not optimistic, the valve spool is stuck, slightly leak and unstable. Boris spread his hands, what's the solution? I joked and asked him why you came to us all of a sudden. He pointed to Erin. She told me that if multiple factories failed to make qualified samples continuously, you could only try AAK Hydraulic Valve. I told him directly that Erin was right and you were right to come here. The valve spools of these flow valves are not accurate enough. Give me 10 days and we will give you 5 high-precision flow valves.

10 days later, his Shanghai Office received 5 samples of our high-precision flow valves. 2 days later, Boris asked us how long it would take to produce 10,000 flow valves. It seems that the sample quality of AAK flow valve has convinced him.

Why can AAK Hydraulic Valve produce the flow valve that the peers can't or don't want to produce? AAK Hydraulic Valve not only has 6 processes, but also 6 parameter indexes as quality assurance:

1. Rough machining of valve spool, select appropriate bar material, cut the size, normalize and quench and temper. Parameter requirements: hardness above 32HRC.

2. Finish machining for the first time, flat end face, drill the center hole, the core is in the hole row, and the hole accuracy. Parameter requirements: the accuracy shall not be higher than 0.005mm, and the surface roughness Ra value shall not be higher than 0.16 μ m.

3. Step 3: the semi-finished work piece is subject to vacuum quenching unique to AAK and then stabilized. It is required to be cold treated at - 80 ℃ for 2h, aging temperature of 420 ℃ and heat preservation of more than 10h. Parameter requirements: hardness above 66HRC.

4. Finish machining again. First rough grind the outer circle and each end face of the shoulder. The core is the size matching between the outer circle and shoulder of the valve spool and the valve sleeve. Different clearance dimensions are implemented according to different hydraulic valves. Parameter requirements: no more than 0.005--0.035mm

5. Grind the outer circle carefully, after stabilizing the work piece, then grind the center hole of valve spool. Parameter: surface roughness Ra value is not higher than 0.1 μ m.

6. Finishing. For the high precision hydraulic valve, we adopt mirror grinding and finishing, double wheel honing, and our peers basically adopts fine grinding. Parameter requirements: surface roughness Ra value is not higher than 0.01 μ m.

After all valve spool processes are completed, our valve spool Ra value is 0.01 μ m. Ra value of valve spool of most peers is 0.08 μ m. Ra value of valve spool of a few peers is 0.02 μ m. The comparison of these values is the embodiment of our valve spool process strength.

AAK Hydraulic Valve spool has 6 processes and 6 parameters, which has taken 6 steps ahead of its peers. AAK Hydraulic Valve precision parameters, peers may be able to think of, but in most cases cannot achieve it, you are encouraged to have a small try with AAK Hydraulic Valve.

AAK cartridge valve has unique skills to avoid horn hole during cartridge hole processing

The geometric tolerance of the cavity hole of the cartridge valve combination hole produced by AAK is controlled within 0.02mm, which is only half of the geometric tolerance of 0.03-0.05mm in the same industry. At the same time, the transition angles between the small holes of the cartridge valve are replaced by small rounded corners to completely avoid the phenomenon of "horn hole".

The "horn hole" appears after the cartridge valve is used for a period of time, which is a common problem of the cartridge valve. The root cause is the processing bottleneck of cartridge valve combination hole. The cartridge valve with horn hole will leak during production. What is more troublesome is that the pollutants outside the cartridge valve are easy to enter the valve spool with the hydraulic oil, resulting in the strike of the whole hydraulic system.

Some time ago, Ryan, an American Hydraulic customer, placed an order for a threaded cartridge valve to a hydraulic valve factory in Guangdong. He received the cartridge valve samples for 3 times, but failed testing for 3 times, either leakage was found or pollutants outside the cartridge valve were easy to enter the valve spool. Ryan checked with the hydraulic valve factory for many times, but problems could not be solved. In desperation, he can only find new hydraulic valve manufacturers.

Ryan found AAK Hydraulic Valve on Google platform. After a week's understanding, maybe Ryan thinks that AAK can help him solve the problems faced by the cartridge valve this time. On the same day, he sent us the cartridge valve samples from the previous hydraulic valve factory, as well as the technical drawings of his cartridge valve. After receiving and testing the samples, we found that the coaxiality of the cavity hole diameter of the combined holes of these threaded cartridge valves is between 0.03-0.05mm. At the same time, there is a knife connection trace at the transition R angle, resulting in the phenomenon of "horn hole".

We emailed Ryan the test results and told him that we could send cartridge valve samples meeting his requirements within 15 days. On the 3rd day after Ryan received the cartridge valve samples, he informed us by email that the parameters of our cartridge valve samples were up to standard. He asked us how to avoid these problems happened in the other suppliers in mass production.

For the cavity hole of the cartridge valve combination hole, AAK Hydraulic Valve has been 1 step ahead of our peers. It is programmed by the automatic programming software, which replaces the manual programming commonly used by our peers. The geometric tolerance of the cartridge valve cavity hole has been improved in the first step. The cartridge valve can be processed after the cavity hole is automatically generated. When semi finishing the cavity hole, the first small hole is directly processed and formed, and no subsequent processing is required. The geometric tolerance of the cartridge valve cavity hole is improved in step 2. The geometric tolerance of cartridge valve cavity hole and each hole must be controlled within 0.02mm, which is our hard index. At the same time, each transition angle between the small holes of the cartridge valve is replaced by a small fillet to transition, not the common R angle in the same industry, so as to completely avoid the phenomenon of "horn hole". AAK Hydraulic Valve, by optimizing the processing parameters of cartridge hole and upgrading the processing technology of cartridge valve cavity hole, the phenomenon of "horn hole" in processing is eliminated and the processing accuracy of cartridge hole is improved.

AAK cartridge valve, no leakage, no "horn hole", just precision and guarantee. We wait for you to try the order.

AAK Hydraulic Valve has its own 3 high standards and enforces it strictly, so American customer resolutely transferred the order of hydraulic threaded cartridge valve to AAK factory for production. Such things often happen. We do better than brothers in the same industry. Not only to make the customers satisfied, but very satisfied, and strive to achieve great satisfaction. The 3 high standards of AAK Hydraulic threaded cartridge valve are as follows:

1) High Accuracy: the opening and closing characteristics can reach 95% opening rate and 90% closing rate;
2) High Stability: the pressure swing shall not exceed ± 0.1MPa;
3) High Durability: the design service life is more than 1 million times.

In the entire hydraulic valve market, due to the limitations of production equipment and technology, more than 90% of manufacturers have potential hidden quality problems on the hydraulic threaded cartridge valve they produced, such as assembly errors, the valve spool deviates from the central axis. After being used, the hydraulic threaded cartridge valve has problems like poor opening and closing performance, unstable pressure, short service life and so on. What is more difficult to solve is that these potential problems are not easy to be found during inspection. Only after being used for a period of time, customer complaints come one after another, these hidden quality problems of the hydraulic threaded cartridge valves are realized.

In March 2021, we received an inquiry from an American hydraulic valve customer. Their hydraulic threaded cartridge valves were purchased from hydraulic valve factory in Guangdong previously. His terminal hydraulic valve customers have a higher precision requirement now. However, due to the limitations of production equipment and technology, the parameters of Guangdong suppliers are unstable, the opening and closing performance of the hydraulic threaded cartridge valves produced is poor, and the pressure commissioning is unstable. After being used for nearly 400,000 times, there will be jamming, regulation failure and other conditions, resulting in more and more complaints from users of hydraulic threaded cartridge valves. Ayden has to look for new threaded cartridge valve suppliers here and there.

Ayden got into touch with us through Google and learned that AAK factory uses numerical control lathes imported from Switzerland, and strictly implements the 3 high process standards, so that the opening and closing characteristics of hydraulic thread cartridge valve can reach 95% opening rate and 90% closing rate, which is 12% higher than that of Guangdong hydraulic valve factory, and the pressure swing does not exceed ± 0.1MPa. The service life of hydraulic thread cartridge valve is at least over 1 million times, which is 2.5 times higher than the 400,000 times of Guangdong factory. Ayden was shocked. He didn't expect such a high-precision hydraulic valve factory in Ningbo.

With a try attitude, Ayden requested us to make samples. In 10 days, we sent samples of hydraulic threaded cartridge valves. After more than half a month of testing and comparison, everything was OK. Ayden did not hesitate to transfer the order to AAK Hydraulic Valve factory.

AAK Hydraulic Valve breaks the conventional process of hydraulic valve and produces hydraulic threaded cartridge valve with 3 high standards unmatched by peers. Don't believe it? You can also try one order.

The reverse sealing performance of hydraulic check valve has always been the hard index controlled by AAK. AAK has its own technology and process. It strictly controls 3 checks in production to ensure no blind area for quality. The reverse sealing performance of AAK hydraulic check valve catches up with and exceeds 90% of its peers. The North Carolina hydraulic customer who just shipped in March recently placed a new order for Hydraulic Check Valves with new item number. AAK Hydraulic Valve has become his preferred manufacturer supplier for purchasing hydraulic check valves.

In March this year, Leo, a North Carolina hydraulic customer, delivered a batch of orders for hydraulic check valves in the forklift system from AAK, and the market responded very well. A few days ago, his customer had another batch of orders for hydraulic check valves with new item number and designated AAK to produce them.

Leo was surprised that his customer appointed AAK Hydraulic Valve factory to produce this order. Because the hydraulic check valves his customer purchased before hit a nail, later he changed the hydraulic valve factories one after another, wasting a lot of time and opportunities. The main problem with these hydraulic check valve manufacturers is that there is a small gap between the conical surface of the valve spool and the valve seat, and leakage occurs from time to time. The customer was impressed by the good quality of AAK hydraulic check valves shipped in March, so he asked Leo to assigned AAK as the preferred hydraulic check valve manufacturer.

The reverse sealing performance of hydraulic check valve is the most important index, and it has always been the hard index controlled by AAK. AAK has its own technology and process. Firstly, strictly detect whether the coaxiality of the valve spool and valve seat meets the parameter requirements. Secondly, check whether the contact surface between the valve spool and valve seat is damaged or has poor contact during assembly. Finally, check four aspects according to the parameters: 1) The sealing test must not bubble for more than 10s, replacing 5s of peers; 2) the roundness of valve seat surface should be controlled below 0.6Ua, replacing 0.8Ua of peers; 3) observe whether the seat surface is scratched with a microscope; 4) simulate the working scene of the hydraulic check valve, and ensure there is no external leakage within the working pressure range.

No matter which aspect has problems, AAK must rearrange hinge, grinding and other processing. The strict control of quality, sealing performance and leakage are the reasons why customers choose AAK, which is also the lack of quality control awareness of more than 90% of its peers.

2 weeks later, Leo received our PPS of the hydraulic check valves. His customer was still full of praise for our quality and asked us to start mass production. In private, Leo also joked that with the support of AAK hydraulic valves, his customers sent more and more inquiries for their hydraulic valves. What's more important is that he doesn't have anything to do after ordering from AAK. He has more time to go fishing. Yes, fishing is his biggest hobby.

With high quality of reverse sealing performance, AAK hydraulic check valves are strictly controlled for leakage. Come and try it!

The Hydraulic Valve Leaked Oil, Adrian Was Particularly Anxious, AAK High-precision Hydraulic Valve Solved The Goods Rejection Dilemma

Adrian, a hydraulic customer from the United States, purchased a batch of hydraulic pressure control valves from Guangdong last year. Recently, he received many complaints from users. There was slight leakage of hydraulic oil between the pressure valve and the valve block from time to time, resulting in unbalanced pressure of the hydraulic pressure valve system. In serious cases, the pressure valve went on strike directly. With more and more complaints, some users asked to return the goods. Adrian knew that if it was not solved properly, it would affect the subsequent sales of hydraulic pressure valves and even lose the market. A week later, Adrian was particularly anxious because he had not determined a complete solution.

Through Google search, Adrian saw our website www.aakiudustry.com. There happened to be an article about the valve block, which mentioned that for the 5 parameters of valve block production, AAK hydraulic valve block is manufactured strictly in accordance with its own 5 processing procedures to ensure at least 7H screw hole machining accuracy requirements; the roughness of mounting hole should be at least Ra0.8; the geometric tolerance is 0.02-0.05MM; the surface roughness of 0-ring groove is at least Ra3.2, and the surface roughness of flow channel is at least Ra12.5. More importantly, the fit clearance error between the hydraulic pressure valve and the valve block produced by AAK can be reduced to 2μm-3μm. This is a standard that many manufacturers can't reach at present.

After reading this article, Adrian immediately emailed us to ask if the hydraulic pressure valve can be leak free. I asked him to send drawings and tell us the difficulties he is facing. Maybe he knew at that time that AAK should be able to help him. After he send us the shipment sample of the hydraulic pressure valve, then we can discuss it later.

After receiving and checking the hydraulic pressure valve samples, we found that most of the parameters of the hydraulic pressure valve passed the test. The biggest problem was that the fit clearance between the valve and the valve block was 8μm-10μm, this was the main reason why the hydraulic oil leaked from time to time. According to his drawings and the working scene of the hydraulic pressure valve, we told him that we could achieve no leakage. If necessary, we could send samples of hydraulic pressure valves within 10 days. Adrian was surprised why we were so confident.

The 5 production processes of AAK Hydraulic valve block: 1) pretreatment - 2) machining - 3) deburring - 4) cleaning - 5) assembly and inspection. We have 5 parameters as hard indexes and 1 feature. The matching clearance error between hydraulic pressure valve and valve block can be reduced to 2μm-3μm, 2-3 times smaller than our peers, which is the root of our confidence.

On the 5th day after sending the hydraulic pressure valve samples, the test was passed. Adrian hoped to produce 150 hydraulic pressure valves as soon as possible to solve the goods rejection dilemma. His customers reported that the AAK hydraulic pressure valves are easy to assemble, sensitive to action, low in vibration, and would not leak oil when increasing the working pressure. After we confirmed the delivery details of 150 hydraulic pressure valves with Adrian, he said that he could finally have a comfortable sleep.

AAK hydraulic pressure valve has small vibration, sensitive action and no leakage. Won't you try it?

The original cartridge valve manufacturer could not improve the cone hole roundness and surface roughness of the hydraulic cartridge relief valve. AAK used 3 skills to ensure that the cone hole roundness of the hydraulic cartridge relief valve was within 0.003, the surface roughness was Ra0.6, and it was linear sealed, without leakage, helping Salim out of the after-sales trouble that has stumped him for in 3 months.

Salim is from Chile. A batch of hydraulic cylinders of their company have been complained by customers that they are unstable. After checking, it was found that the hydraulic cartridge relief valve was leaking, which caused the abnormal operation of the oil cylinder. The root cause was the roundness of the cone hole and the surface roughness. The engineer requires to replace the hydraulic cartridge relief valve, and the cone hole roundness is within 0.005, and the surface roughness is below Ra0.8, which can completely solve the hidden danger. The original manufacturer of the hydraulic cartridge relief valve said that the new requirements is 50% higher than before, but he was willing to try. He made samples twice, but still failed to meet the standard. 3 months passed without any result. The customer was unhappy and Salim was worried.

Salim contacted me under the introduction of AAK's old customer Robert. According to his introduction above, the parameter requirements alone are not a big problem, but the internal structure of the original hydraulic cartridge relief valve should be considered. Our engineer reviewed his drawings and the anatomical drawing of the original hydraulic cartridge relief valve manufacturer, and came up with the plan 2 days later. Salim asked AAK to make samples. After 35 days, AAK sent 12 hydraulic cartridge relief valves. 3 weeks later, Salim emailed that after replacing the hydraulic cartridge relief valve of the original manufacturer, the hydraulic cylinder worked normally.

At the beginning of last month, Salim sent a PO for 240 hydraulic cartridge relief valves. 8 months later, the customer no longer complained about the hydraulic cylinder. His boss was very satisfied with the accuracy of AAK hydraulic cartridge relief valves. The taper hole roundness was within 0.003, the surface roughness was Ra0.6, and it was linear sealed and leak free. All their hydraulic cylinders in stock should be replaced with AAK hydraulic cartridge relief valves. AAK engineers improved the processing technology with 3 skills for the internal structure of the hydraulic cartridge relief valve:

1. The valve seat of the hydraulic cartridge relief valve shall be turned. First, rough holes shall be drilled. The rotation speed of the drill is 1500~1800r/min, and the feed speed is 140~160mm/min. Then, the bottom hole of the thread shall be machined at the bottom of the rough hole. In the middle section of the rough hole, an enlarged hole shall be machined with a boring cutter.

2. Finish the top of the rough hole with a milling cutter to form a tapered hole, and then grind the enlarged hole with an internal and external grinder.

3. Use self-made grinding tools to grind and polish the top of the tapered hole in 2 ways: low speed, fast feed, low speed and slow feed. The coaxiality between the column bar in the middle of the tool and the top cone surface is strictly controlled within the range of 0.003~0.005.

AAK hydraulic cartridge relief valve, there is unique skill to process, you can also try a small order!

The Flow Instability, Which Plagued German Customer For More Than 1 Year, Has Been Solved After Using AAK Hydraulic Flow Valve

The throttle is one of the core components of the hydraulic flow valve. AAK adopts the axial triangular groove throttle, which has large hydraulic radius and wide adjustment range. Moreover, the flow of the hydraulic flow valve is stabilized at 50ml/min without flow instability. The flow instability of the hydraulic flow valve, which has plagued German customer for more than 1 year, has been solved after using the AAK hydraulic flow valve.

With the increasing number of hydraulic valve manufacturers, the price of hydraulic valve is becoming more and more transparent. The price competition of different manufacturers directly leads to the decline of the quality of hydraulic valve components. Although they have coped with the market for a time, they are absolutely unable to cope with the customers who pay high attention to the quality of hydraulic valve.

Last month, a German customer came to inquire about the hydraulic flow valve by e-mail. Because this hydraulic flow valve is too common, we sent a quotation directly. The customer said that the price of this hydraulic flow valve is a little higher than that ordered in the past. At that time, I asked him why he found a new hydraulic flow valve manufacturer, and the customer was also straightforward. He wanted to terminate the order of the current hydraulic valve manufacturer. After more than a year of cooperation, the flow of several batches of hydraulic flow valves was unstable, basically in the range of 50-75ml/min, so his customers complained very often.

He said that he had been looking for new hydraulic flow valve manufacturers, and AAK hydraulic valve was recommended by one of his customers. His customer has purchased hydraulic flow valve from AAK for more than 3 years, and the flow stability is good.

Flow stability is an important quality index of hydraulic flow valve. After more than 2 years of exploration, AAK hydraulic flow valve has adopted new processes and parameters in the production of axial triangular groove throttle, which can stabilize the flow at 50ml/min. Now it is a relatively mature process, and basically there will be no flow fluctuation.

The German customer asked us to send several hydraulic flow valve samples immediately. Last week, we received feedback of the hydraulic flow valve samples. His customers like such quality and parameters. More importantly, the flow of these hydraulic flow valves is stable at 50ml/min.

The unstable flow of hydraulic valves is a common problem in many factories. If you also encounter this problem, try a small order with AAK hydraulic valve.

AAK Hydraulic Pressure Valve Has a Service Life of More Than 1 Million Times, Becoming the Preferred Manufacturer of a British customer for Parker Series Hydraulic Valves

AAK has supplied Parker series hydraulic pressure valves with not only 95% opening rate, but also 90% closing rate, and the pressure swing is controlled at ±0.1MPa. What is more unexpected to customer is that the service life is 2.5 times longer than that of the other manufacturers, up to more than 1 million times. Therefore, without suspense, AAK has become the preferred manufacturer of a British customer for Parker series hydraulic valves.

In the hydraulic valve industry, more and more manufacturers focus on homogeneous hydraulic valves and only carry on price war when developing market, resulting in the decline of the quality of hydraulic valve components, the decline of process level and the simplification of production process. Many hydraulic valve manufacturers think they know how to make durable hydraulic valves, but always encounter problems when they make samples and run in production.

At the beginning, when Shawn, a British customer, was looking for Parker series hydraulic pressure valves in China, he totally tested hydraulic pressure valves from more than 10 manufacturers, but none of them is a satisfying hydraulic valve manufacturer. Some hydraulic pressure valves are stable, but the accuracy is not up to standard; some accuracy is OK, but the stability is not up to standard. For example, the opening and closing performance of hydraulic pressure valve is poor, the valve spool is not smooth, and the service life is short. Seeing that the delivery deadline of Parker series hydraulic pressure valve is coming, Shawn is very worried.

Shawn found our website on Google, www.aakindustry.com, and contacted our company. After communication, he learned that we had produced Parker series hydraulic pressure valves before. He was very happy and satisfied with the opening and closing performance, the pressure swing and the usage times of our hydraulic pressure valves. AAK hydraulic valve is favored by customers at home and abroad with the 3 standards of "high precision, high stability and high durability".

Shawn said that the hydraulic valve factories he met in the past, the opening and closing performance of the hydraulic pressure valve can only reach 83% opening rate and 78% closing rate, and the pressure swing exceeds ±0.1MPa, and the service life is only around 400 thousand times. However, the Parker series hydraulic pressure valves produced by AAK can achieve an opening rate of up to 95% and a closing rate of 90%. At the same time, the pressure swing is controlled at ±0.1MPa, and its service life is 2.5 times longer than that of its peers, up to more than 1 million times. How could Shawn be unhappy?

After receiving the samples of Parker series hydraulic pressure valves from AAK, Shawn tested and found that they all met his requirements, so he placed an order and let us prepare materials and begin production. After receiving the goods, his customers also said that the Parker series hydraulic pressure valves produced by AAK have stable quality, up to standard accuracy and durability. Shawn said that his company decided to transfer all orders for hydraulic pressure valves to AAK in the future.

AAK factory is the first choice for hydraulic pressure valves with a service life of more than 1 million times. Feel at ease to use them.

The Damping Holes of Hydraulic Pressure Valves from Several Manufacturers Are Blocked, But AAK Reassures the American Customer Brody

Brody is the purchasing director of a hydraulic valve dealer in the United States. He purchased a batch of Pilot operated Hydraulic pressure valves this May in China. However, customers began to complain because during the use of the hydraulic pressure valve, the damping hole was often blocked, resulting in loss of pressure at the pilot stage, failure of the hydraulic pressure valve and failure of the hydraulic system. Some customers asked for return. Brody communicated with the factory supplied the hydraulic pressure valves for many times but couldn't find a good solution.

Brody's tried to source for new hydraulic valve factories but it did not go smooth as well. He spent 7 days talking about with more than 30 hydraulic valve factories and got almost the same answer: the problem of damping hole blocking cannot be solved 100%, and the only way is to let the customer choose high-purity hydraulic oil. Brody knew that replying to guests in this way would not only get a claim, but also losing the whole market. He would also lose his job.

Brody got into contact with AAK hydraulic valve through the introduction of other factories. After two rounds of e-mail communication, we learned that he was in a mess because of the damping hole of the pilot hydraulic pressure valve. Unexpectedly, AAK has mass produced pilot hydraulic pressure valves as early as 1 year ago, which was not difficult for us. Brody was surprised and maybe didn't believe it. We told him that you can go to our website www.aakindustry.com and also continue to source for other hydraulic valve factories. If you believe us, send us your hydraulic pressure valve artwork and try our sample.

Hydraulic pressure valve is sought after by the market for its stable pressure control, small pressure rise and smooth overflow curve. The pilot requires a small flow of pressure oil to act on the pilot stage. The pressure oil is often guided into the pilot stage through the damping slender hole. Through the opening and closing of the pilot stage, changing the upper and lower pressure difference of the main stage spool to achieve the opening and closing of the main spool, so as to achieve the pressure control of large flow hydraulic oil.

However, under the actual working conditions, due to the high requirements for oil cleanliness of the damping slender hole, if not handled properly, the damping hole is easy to be blocked, resulting in the shutdown of the equipment and the failure of the whole hydraulic system. We realized this problem of pilot hydraulic pressure valve 2 years ago. AAK optimized the process of pilot hydraulic pressure valve. After about 1 year of exploration and demonstration, it is invented to add welded high-strength filter screen at the inlet section of pilot slender hole and local turbulent self-cleaning function, so as to reduce the impact of oil pollution on the normal operation of the valve. The opening and overflow characteristics are excellent, and the pressure curve is less affected by the change of overflow flow, which plays a very good protective role for the system. 1 year ago, a famous domestic construction machinery manufacturer purchased from AAK hydraulic valve and took the goods almost every month.

Brody may have no choice. The next day, we received his hydraulic pressure valve artwork, specifying the proofing time and cost. 9 days later, we sent three samples of hydraulic pressure valves. Brody's email came 15 days after that, letting us hurry up to prepare the materials and help replenish the goods first. His customers were very satisfied, his boss was very happy, and he could take a vacation.

Damping hole blockage is an unavoidable problem. Don't be afraid. AAK has clever ways to improve it. Welcome to consult us!

The Valve Spool With Hardness of 65HRC Can Not Be Made in 30 Factories, But AAK Hydraulic Valve Has Already achieved it.

Felix is the purchaser of a hydraulic valve company in Germany. Some time ago, he wanted to purchase a batch of hydraulic flow valves with valve spool hardness of 65HRC. He had consulted more than 30 manufacturers in a month (with great perseverance). Only two hydraulic valve manufacturers said that 58HRC is the limit, and the rest had no sound at all. Felix couldn't resist the pressure of customers urging goods every day and was ready to give up the order. His boss was unhappy after hearing it, so his pressure was even greater.

Felix accidentally saw an article about 65HRC valve spool of AAK hydraulic valve when browsing some B2B websites. Realizing that maybe AAK hydraulic valve could bring him good luck, Felix directly asked by email whether we could produce hydraulic flow valve with valve spool hardness above 65HCR. We replied that we need to know the working scene of your hydraulic flow valve and the drawings before we judged.

It is not the first time for AAK hydraulic valve to receive consultation on the hardness of valve spool. Some hydraulic valve manufacturers can not solve the problem of hardness because of the following reasons. First, without professional and systematic knowledge about material, how can they choose the most suitable alloy steel material? Most importantly, the heat treatment of materials is led by the processing factory, because the heat treatment is processed outside, and 20% of the factory changed the outsourcing processing place with one shot, thus, the hardness can not be guaranteed, let alone the stability.

Regarding the material for the valve spool, AAK hydraulic valve selects the most suitable steel according to the working scene of the hydraulic valve, the medium used, and the customer's hydraulic parameters, then combined them with the wear resistance, linear expansion coefficient and deformation of different steel. The High grade tool steel like Cr12MoV, 12CrNi3A, 18CrNiWA and GCr15 are our common materials, and the last and most important link in the hardness of the hydraulic flow valve spool is the heat treatment process of the steel. If the hardness needs to be above 65HRC, the carbon content of steel should be considered first, and then find a way in heat treatment. Steels with different contents have different heat treatment methods in quenching, carburizing and nitriding. Pretreatment, quenching, cold treatment, tempering, aging, fine processing and secondary aging, the aging temperature and holding time of these processes are the key. We can achieve the aging temperature of 420℃ and heat preservation of more than 10H, obtaining a hardness of 65HRC or above, which our peers can't think of or do.

We received the drawings of Felix's hydraulic flow valve. In the email, the product performance, operating conditions, product parameter, details are all mentioned and marked, especially the emphasis on the valve spool hardness of 65HRC. We had to admire the German's preciseness. According to these indicators of the hydraulic flow valve, the technical team of AAK hydraulic valve carefully simulated and replied to him by email that we could send the samples of the hydraulic flow valve within 12 days. Felix was happy but also worried, he once again emphasized various indicators of hydraulic flow valve, especially the hardness of valve spool 65HCR. We could understand his mood. After all, many hydraulic valve manufacturers couldn't meet this standard.

Two weeks after we sent the samples of hydraulic flow valves, Felix directly placed a small order of 200 hydraulic flow valves. He told us privately that his customers were very satisfied with the samples of these hydraulic flow valves, but they were a little worried about the stability of the mass production. We could understand his customer's trial order. After all, many hydraulic valve manufacturers couldn't meet this standard. We believe that large orders for hydraulic flow valves will be placed with AAK within 2 months after shipment.

If you also need 65HRC valve spool hardness index, please contact AAK hydraulic valve. Email: valve at aakindustry com.

6 Proofing Can Not Solve the Horn Hole, but AAK Hydraulic Flow Valve Has already been Solved Successfully

Maarten, a Dutch hydraulic valve customer, had an order for a batch of hydraulic flow valves some time ago and gave it to a hydraulic valve manufacturer in Ningbo. After 6 proofing, the hydraulic flow valve samples failed test for all 6 times, for either leakage or pollutants outside the cartridge valve are easy to enter the valve spool. After many communications with the maker, the problems still could not be effectively solved. His customer complained to his boss. The boss asked Maarten to give an effective solution within a week. Battered, he had no clue and could only aimlessly look for a new hydraulic valve manufacturer.

While constantly checking with other hydraulic valve manufacturers, Maarten also continued to find some similar cases on the Internet. Occasionally, he saw an article about "horn hole" from AAK hydraulic valve on Google. After careful reading, he found that it was very similar to the problems he encountered, so he contacted us online with a try attitude and continued to ask about some of the problems he encountered at present.

Hydraulic flow valve, a kind of cartridge valve, will have the phenomenon of "horn hole" after being used for a period of time, which is a common problem of cartridge valve. The root cause is the processing bottleneck of the cartridge valve combination hole. The processing coaxiality of the cavity hole diameter of these threaded cartridge valve combination holes is 0.03-0.05mm. At the same time, there are machined trace at the transition R angle, resulting in leakage during use. What's more troublesome is that it is easy to cause pollutants outside the cartridge valve to enter the valve spool with the hydraulic oil, causing the whole hydraulic system to strike. Many hydraulic valve manufacturers are used to the domestic market. These "horn holes" have little impact on some mechanical equipment. Therefore, many hydraulic valve manufacturers have not tackled this technical barrier.

AAK has been one step ahead of its peers in the process of cavity hole processing of cartridge valve combination hole. It is programmed by automatic programming software, which replaces the manual programming commonly used by peers. The geometric tolerance of cartridge valve cavity hole has been further improved. The cartridge valve can be processed after automatically generating cavity hole. When semi finishing the cavity hole, the first counter bore is directly machined and no further machining is required, so the geometric tolerance of the cartridge valve cavity hole is improved again. The geometric tolerance of each hole of cartridge valve cavity must be controlled within 0.02mm, which is a hard index. At the same time, each transition angle between the small holes of the cartridge valve is replaced by a small fillet to transition from the common R angle of peers, so as to completely avoid the phenomenon of "horn hole". By optimizing the processing parameters of cartridge hole and upgrading the processing technology of cartridge valve cavity hole, AAK hydraulic valve eliminates the phenomenon of "horn hole" in processing and improves the processing accuracy of cartridge hole.

7 days later, we received the hydraulic flow valve samples from other manufacturers sent by Maarten. After further testing, we found that the leakage problem was really caused by the "horn hole" phenomenon. After sending back the test results to Maarten, we received the product drawings and usage scenario descriptions sent by Maarten the next day. He asked us to make three hydraulic flow valve samples for his customers to test.

Maarten asked us to prepare materials 15 days after the hydraulic flow valve samples were sent. His customers were very satisfied with our samples and wanted to try an order for 500 hydraulic flow valves. Maarten privately informed that the boss was also very happy that he could quickly and effectively solve the problem of the order of hydraulic flow valve. He was more and more confident in the purchase of hydraulic valve.

AAK hydraulic valve, no leakage, no horn hole, waiting for you to try an order.

Factory Can Not Even Achieve The Valve Spool Ra Value at 0.16μm, but AAK Has Already Mass Produced Hydraulic Valves 5 Times Finer Than It

Charles is our old hydraulic valve customer. Some time ago, he purchased a batch of hydraulic flow valves from a hydraulic valve manufacturer in Guangdong. However, he didn't expect to be busy on changing suppliers before the order was shipped. The hydraulic flow valves can not pass inspection. The surface roughness Ra value of hydraulic valve spool work piece should be below 0.16μm, but there was 0.2μm、0.25μm、0.28μm in mass production. The problem had not been properly solved through repeated communication. Seeing that the delivery date was coming, Charles was worried and could only plan to cancel the order with his customer.

It is easy to lose the customer if there is no solution but directly express the problem like this. His boss asked him to get the solution and let the customer decide whether to cancel the order. I noticed that he was asking for help on LinkedIn. After communicating with him, I learned the whole story.

This hydraulic valve factory in Guangdong is Charles’ old supplier. It has been supplying his company with some conventional hydraulic valves. He had asked the factory whether the surface roughness Ra value of the valve spool could reach below 0.16μm, and the factory said that there was no problem. The proofing was also smooth, then Charles decided to place order with this hydraulic valve factory. Later, it was learned that this hydraulic valve factory could not produce hydraulic valve with Ra value below 0.16μm due to the limitation of its own process equipment and technology. The factory was worried that the customer might walk away, so he accepted the order regardless of his ability. The proofing of this factory’s hydraulic valve was outsourced. It was originally agreed that the mass production was also completed by the proofing factory, but the proofing factory rejected the production of the goods finally. Then the hydraulic valve factory arranged mass production in its own factory without authorization, thinking it could muddle through.

I asked him to send us the drawings of this hydraulic flow valve and told him that AAK had mass produced the valve spool with the Ra value reached 0.02 ~ 0.04μm. He immediately asked the production time of 1000 hydraulic flow valves by e-mail, and asked the old supplier to send us several production samples to see the quality.

After getting the support of AAK, Charles truthfully told his customer that the current goods can not pass inspection, he needs to change factory and needs another two months to for re-production. Unexpectedly, the customer expressed understanding. Out of the trust of cooperation, the customer not only did not cancel the order, but also accepted the new delivery date.

We have produced the hydraulic valves with Ra value of valve spool at 0.02 ~ 0.04μm, which can't be done by our peers. Let's take a look at how AAK hydraulic valve makes the valve spool.

AAK proprietary valve spool processing technology: the valve spool generally uses bar material as blank and is processed after normalizing. The process includes: cutting the end face, drilling the center hole, rough turning and fine turning the outer circle, end face and inner hole of countersunk groove, drilling, milling, heat treatment, grinding the center hole, grinding the outer circle, and finishing the outer circle. At the same time, in grinding, high finish grinding is generally used to make the surface roughness Ra value of the workpiece below 0.16μm, some RA values can even reach 0.02 ~ 0.04μm, the roughness value can be nearly 10 times higher than that of peers.

After we started producing this hydraulic flow valve, and sent a video to show Charles our production situation and progress, he was finally able to relax and said he would start his vacation.

AAK value spool precision, let you rest assured.

AAK Uses 5 More Processes to Ensure That The Valve Block Is Free of Iron Filings, Which Satisfies The American Customer After Testing The Sample

After the AAK Hydraulic valve block is processed, it shall be consolidated in 5 processes to ensure that it is free of iron filings and completely avoid the pollution of the hydraulic system. Less than 10% of manufacturers are willing to make efforts to improve this detail. American customer is very satisfied after receiving AAK hydraulic valve block samples.

In the intersecting processing channels of the hydraulic valve block, iron filings are easy to remain, especially in the slender hole, which is difficult to clean. These fine iron filings are easy to enter the system and cause pollution, resulting in paralysis of the hydraulic system. The eradication of iron filings is a cumbersome process. In order to save costs, many hydraulic valve manufacturers will save processes as long as the hydraulic valve has no problems in the short term. It is a common problem of this industry, less than 10% of manufacturers are willing to make efforts to improve this detail, causing many customers to be cheated.

George, an American Hydraulic customer, purchased a batch of hydraulic valve blocks some time ago. The parameters of system were normal in the early test, but unexpectedly, after 15 days, the hydraulic oil in the system suddenly deteriorated. He didn't know that the hydraulic valve was wrong until the whole test system stopped. After careful analysis of the causes, it was found that there were iron filings inside the oil, and the internal valve spool of the cartridge valve connected with the valve block also showed signs of wear. Hydraulic valve factory deliberately evaded the problem and had no good solution. George was helpless and had to find a new hydraulic valve factory while waiting for the current factory to solve the problem.

We are not sure how he found our AAK hydraulic valve. After receiving his email, we replied how we eradicated the residual iron filings in valve block. 6 years ago, we also failed the inspection due to the residual iron filings in the valve block. It took us half a year to explore a set of methods that could completely eradicate the residual iron filings in the valve block:

1. Cook with high-temperature alkaline water to make the iron filings in the valve block lose their magnetism.

2. Hold the rotary file with an electric or pneumatic small grinding wheel, and clean the flash and burr at the corner of the hole channel with a round file for deep holes to achieve smooth connection.

3. Use compressed air and high-pressure washing machine to wash the dirt on the inner and outer surfaces of the duct under high pressure.

4. Use industrial endoscope and cold light source to check the flash and burr at the corner in the duct. If any, flush it point-to-point under high pressure until the iron filings in the valve block are completely eradicated.

5. Clean the residual water and oil in the duct with white silk cloth to ensure that the valve block is clean and free of any residue.

George was very cautious and needed us to provide videos. We replied to him directly that you might not believe it now, but in order to save time of both parties, let's test the samples directly. We directly proofed according to his drawings. 25 days after the valve block of the hydraulic valve was sent, he sent an email to us. After 20 days of testing, his company was very satisfied with AAK's valve block. The hydraulic system, oil quality and hydraulic accessories were normal, which completely avoided the problem of system pollution.

AAK hydraulic valve block, no residual iron filings, you can give it a try.

The Inner Hole Accuracy of AAK Hydraulic Valve Is Controlled At 1μm, Making The Business of American Customer Soar 3 Times

Tristan, an American customer who just shipped a batch of hydraulic pressure valves worth 70,000 US dollars 3 months ago, placed a repeat order for hydraulic pressure valve worth more than 200,000 US dollars today. Since Tristan chose AAK hydraulic valve, his customers are very satisfied with the accuracy and stability of the hydraulic valve. The orders he took from customers has soared more than 3 times. Now his position in the company is getting higher and higher.

We still remember that Tristan contacted us through Google and sent an email asking about the accuracy of the hydraulic valve. After several communications, we learned that because of the change of his end users, he needed to use pressure valves with higher precision. He looked for dozens of hydraulic valve factories, but none of them dared to promise that the inner hole accuracy error of hydraulic valve could be controlled at 1μm. As a result, Tristan got fewer and fewer orders for hydraulic valves.

The inner hole accuracy error of hydraulic valve shall be controlled at about 1μm is not just difficult to do, but very difficult to do. This requires not only the support of equipment, the preciseness of skilled workers and the management of quality control, but also the quality awareness and craftsmanship spirit of the whole factory. Only a few domestic hydraulic valve manufacturers have such technical and equipment support. AAK hydraulic valve has a professional research and development team and advanced imported equipment, so that the hydraulic valve with inner hole accuracy error controlled at about 1μm can be mass produced.

Tristan felt the dawn after knowing the ability of AAK Hydraulic Valve, and asked whether we could make samples for his to test. Later, he received the hydraulic pressure valve samples we sent as scheduled. Just after receiving the sample, he sent a message saying that the surface gloss of AAK hydraulic valve was really very good. After testing and analysis, the inner hole accuracy of AAK hydraulic pressure valve fully met the new needs of end users, which was just the pressure control valve they were looking for. On the 5th day after Tristan received the samples, we also received his first order for hydraulic pressure valves of 70,000 US dollars.

AAK hydraulic valve has 2 absolute advantages:

1. AAK hydraulic valve imported advanced equipment - honing machine, to ensure that the inner hole accuracy error is controlled at about 1μm.

2. The independent professional research and development team, cooperates with the unique research and development technology, to realize the personalized customization demand for the inner hole accuracy of hydraulic valve, which can not be achieved by 95% of domestic peers.

Today, Tristan repeated an order of more than 200,000 US dollars for the hydraulic pressure valve. At the same time, Tristan informed that since the use of AAK hydraulic pressure valve, many end users are very fond of their hydraulic products, and the inquiry is more and more than in previous years. Now, their order volume in a quarter has more than tripled over the same period, Tristan is working harder and harder, and now his position in the company is higher and higher.

Choosing high-precision AAK hydraulic valve, it is difficult for the business not to soar!

AAK Hydraulic Valve Block Has Unique Anti-rust Technology, Russian Customer Tried A Small Order

AAK hydraulic valve has a proprietary valve block anti-rust treatment technology. A special coating with a thickness of 0.02 ~ 0.03 mm is plated on the surface of the hydraulic valve block. The coating has excellent adsorption, is not easy to fall off and has a bright appearance. On this point alone, it has crushed most of its peers. After several email communications, Russian customer resolutely placed an order with AAK.

Due to the limitation of process, most hydraulic valve factories adopt surface painting or conventional electroplating for the anti-rust treatment of the hydraulic valve block surface. Such anti-rust treatment on the surface of the valve block will cause problems in the routine maintenance or repair of the hydraulic valve in the future. It is mainly reflected in that the valve block is easy to be scratched, causing corrosion and increasing system pollution. Besides, falling paint and other sundries are also easy to enter the valve block channel and bring pollutants directly to the system, resulting in secondary pollution of the system and accidents. The trouble is that it is generally difficult to find the problem of rust prevention on the surface of these valve blocks in the short term.

Anatoly, a Russian hydraulic customer, purchased a batch of hydraulic valve blocks in March from a factory. There were no problems in the preliminary test and final inspection. However, he continued to receive feedback from consumers in the last month. After setting up and debugging, the surface of the valve block fell off paint, rusted, and even there is pollution inside the system. According to the statistics of the information received, among the 200 products purchased, there are nearly 100 products in this situation now, and only 100 are still on sale. Anatoly found something wrong and immediately asked to suspend the sales of the remaining products. At the same time, he communicated with suppliers for many times for these inferior products, but the supplier's attitude was very bad and had always been unable to give accurate solutions.

Anatoly used to interact with us on the B2B platform. We didn't know the problems of his valve block until we received his email last month. For these problems, we talked about the current hydraulic market in the reply to his email. In order to save costs, many peers use very conventional anti-rust treatment on the valve blocks. There are mainly two processes:

1. Directly paint the valve block surface after assembling the components. During component disassembly, replacement and maintenance, it is very easy to damage the paint around the component. At the same time, the fallen paint and other sundries are also easy to enter the valve block duct and cause system pollution

2. After all the valve blocks are processed, a layer of oxide film plating is carried out. The surface oxide film is relatively thin, which is easy to be scratched, causing corrosion and increasing system pollution.

Anatoly asked if we have a way to eradicate it completely. We also encountered these similar valve block problems in the early stage. Our technical team did not follow the trend and insisted on new process exploration, so that AAK has its own unique anti-rust technology now. With the increasing requirements for product aesthetics and pollution control, AAK hydraulic valve adopts the proprietary valve block anti-rust treatment technology, electroplating a special coating with a thickness of 0.02 ~ 0.03 mm on the surface of the valve block. At the same time, the coating has excellent adsorption, not easy to fall off and has bright appearance. Only at this point, it has crushed most peers.

Perhaps Anatoly has already had a sense of trust in us. He sent their valve block drawings and also the valve blocks produced by last hydraulic valve factory, asking us to produce 500 trial orders directly according to these requirements, to make up for the stock shortage caused by the defective products.

AAK hydraulic valve block is free of rust and pollution. You can also try a small order!

Chase is the purchaser of a hydraulic valve company in the United States. The purchase of hydraulic valves has been very smooth for 2 years, but a recent order for hydraulic valve blocks made him very difficult. In the sample approval stage of the hydraulic valve block, the samples had been revised for 4 times, but during the test, it was still found that there were different degrees of burrs at the cross holes of the valve block. Although the last sample had been greatly improved, there were still subtle burrs, which was easy to cause system faults such as unbalanced pressure regulation. His customer did not accept the pre-production sample of hydraulic valve block, and the hydraulic valve manufacturer was still exploring the solution of burr. The customer was pushing, the boss was asking, and the manufacturer had no effective plan. What should he do? He had trouble in sleeping and eating because the delivery date would not wait for him.

The burr of hydraulic valve block is produced during drilling. The shape and size of the burr are related to the spindle speed, drilling feed, work piece material, cutting tool, coolant, bit geometric angle and other factors. It really needs unique skills to clean it thoroughly.

Chase found AAK hydraulic valve through Google search. He emailed us some common questions about the hydraulic valve block. I felt that he had encountered a problem, but he was not sure whether I could solve it and also afraid of wasting time. I directly asked him to tell me the problem of the hydraulic valve block. If it could be solved, I would make the sample directly for him to test. Perhaps he was also surprised that I was so direct, and immediately sent me the drawing of the hydraulic valve block with a special mark in red, saying that it must be 100% burr free. I see, it was the burr problem of the hydraulic valve block.

How to remove burrs? Different manufacturers have different treatment processes. The hydraulic valve factory cooperated with Chase uses manual method to remove burrs. The work piece is polished and deburred with tools such as file, sandpaper and grinding head. This method has blind spots, general effect and low efficiency, especially for the burrs in complex cross holes.

After Chase received our hydraulic valve block sample, he did simulation test. The previous problems such as unbalanced system pressure regulation were solved. The system pressure regulation became more sensitive and the problem was smoothly solved. Chase asked us to help deliver the goods as soon as possible.

How to remove burrs for 100%? AAK adopts the high-pressure solution injection method, weakens the magnetism of the burr with the solution, and then uses the instantaneous impact force of the liquid to not only ensure that the burr of the hydraulic valve block is 100% eradicated, but also effectively clean each part of the hydraulic valve block. Most of our peers do not have such a process.

The customer was very happy that Chase was able to solve the problem quickly this time, and the boss appreciated his ability to deal with the problem. When chatting on LinkedIn a few days ago, Chase told me that because of AAK hydraulic valve block, the sales volume of his customers in the same period had increased nearly twice. Now the boss attaches great importance to him.

Use AAK hydraulic valve block, you will never worry about being "stabbed" by burrs. You can also try a small order.

Maxim, from a hydraulic valve company in Russia, is a very interesting customer. This morning, there was an e-mail from him (in the spam folder). That was the first time he sent an e-mail to us. We took a look and found that he left us a message for the first time 327 days ago.

It was learned from the email that he had previously purchased a batch of hydraulic flow valves in other hydraulic valve manufacturer. After receiving the shipments of the hydraulic flow valves, he found that the parameters of hydraulic flow valve were inconsistent with those in the artwork. When he asked the hydraulic valve manufacturer about this problem, the manufacturer replied that the function of the hydraulic flow valve would not be affected. He believed it. After a period of time, some customers complained, which made him criticized by the boss several times. For example, the valve was stuck, there was oil leakage, the valve spool could not be opened, and there were more than 120 hydraulic flow valves needed to be replaced. Maxim was also confused. He had cooperated with this hydraulic valve manufacturer for several times. How could there be these problems.

Maxim's first message on the B2B platform to us was "interesting", 327 days ago. Later, on our company website, B2B platform, social media etc., as long as there were articles or information about AAK hydraulic valve, he would basically gave “comments” or “likes“, and occasionally asked a question about hydraulic valve, but the interaction frequency was not high. We had an impression of him and always thought that he was the hydraulic valve peer, not the customer.

We replied by email that the inconsistency in the accuracy or parameters of the hydraulic valve was due to the interaction of multiple factors such as raw material grade and process technology. According to your customers' complaints, problems should be from the following 3 points:

1. The machining accuracy of the parts is low, the assembly quality is poor, and the oil is too dirty, resulting in the jamming of the valve spool.

2. The valve spool is not in close contact with the valve seat, and the different shafts of the valve body hole and the valve spool are too large, resulting in leakage.

3. The coaxiality between the valve spool hole and the control piston hole exceeds the standard, and the top of the control piston is bent, so that the valve spool cannot be opened.

At present, what he urgently needed to solve was the problem of goods replacement for customer and to ensure the quality of hydraulic valves. I replied that AAK hydraulic valve not only pursue the accuracy of hydraulic valve, but also pay more attention to the stability of hydraulic valve. We could achieve what you want most with minimal cooperation.

12 minutes after the e-mail was sent, the test order for 120 hydraulic flow valves came. I asked, don't you need us to send you samples for testing first? Maxim said he had paid attention to AAK hydraulic valve for a long time and believed in the quality of AAK hydraulic valve. If this order was shipped smoothly and has no problems later, he would consider AAK as the preferred Hydraulic Valve supplier.

This order goes well... If you are in trouble, don't hesitate to contact me as soon as possible!

AAK hydraulic valve, adopts URMA reaming technology of Swiss quality to process the valve spool hole in the hydraulic valve block. With the precision, reliable and efficient URMA reaming technology, the high precision of the valve spool hole of the hydraulic valve block is ensured, and the stable surface quality and tolerance range are maintained in the whole hole diameter. Brody, an American customer, had asked about no less than 20 hydraulic valve manufacturers, but no hydraulic valve block manufacturer had the ability to undertake his order for hydraulic valve blocks with special valve spool holes. After 3 days of communication with AAK hydraulic valve, he directly placed a trial order for 200 hydraulic valve blocks.

The valve spool hole is the key point in the hydraulic valve block. Many hydraulic valve block manufacturers do not have their own high precision equipment, so they can only process outside. Generally, the outside processing centers only process according to the process parameters, and rarely consider the properties, use scenarios, and service life of machining components. It is difficult to continuously and stably grasp the diameter dimensional tolerance of valve spool hole, coaxiality, cylindricity and roughness. Once such a hydraulic valve block is used, it will directly affect the quality and operation stability of the whole hydraulic system.

Brody, who needed to purchase a batch of special hydraulic valve blocks, asked no less than 20 hydraulic manufacturers, but no manufacturer was able to undertake this order. Brody browsed our website, www.aakindustry.com, emailed us, listed us the process parameters of the valve spool hole in the hydraulic valve block, and the internal anatomy diagram, and asked if we could do it? This hydraulic valve block had high precision requirements due to the existence of most segmented structures in the valve spool hole, small diameter dimensional tolerance of the valve spool hole, and many precision requirements such as coaxiality. This processing was very difficult. I was also curious why Brody didn't ask us like other customers what tools we used. Brody said he didn't need a tool for machining holes, but holes.

When Brody learned that we AAK hydraulic valve could meet the process requirements of his hydraulic valve block and was willing to make a sample for him to test, he seemed to feel that perhaps only AAK hydraulic valve could help him solve the problem of this hydraulic valve block. When he received our hydraulic valve block samples, he informed us by email on the 3rd day that the test results of hydraulic valve block met the requirements. He was also curious about how we AAK hydraulic valve achieved it.

AAK hydraulic valve, adopts URMA reaming technology of Swiss quality to process the valve spool hole in the hydraulic valve block. With the precision, reliable and efficient URMA reaming technology, the high precision of the valve spool hole of the hydraulic valve block is ensured, and the stable surface quality and tolerance range are maintained in the whole hole diameter. The 4 process points of URMA reaming technology ensure that the hydraulic valve block meets Brody's special requirements.

1. Guide bar support: the guide bar support structure ensures that the tool is in the most correct position at all times during cutting.

2. Cooling requirements: the concentration of coolant shall be 12% ~ 15%, the guide bar cutter must be fully lubricated, and the cooling pressure shall be sufficient to ensure smooth chip removal.

3. Runout requirements: the flange interface is adopted, and the runout can be adjusted in both radial and axial directions to ensure that the tool is always in the best state during cutting, and the error control can remain unchanged.

4. Blade replacement: when the blade is worn and the hole diameter is less than or equal to the diameter of the support strip, replace the blade.

Brody was in a good mood after receiving our process explanation and finding the hydraulic valve block pass the test. He directly placed a trial order for 200 hydraulic valve blocks, and the communication time was only 3 days.

AAK hydraulic valve, with guaranteed accuracy, you can also have a small try.

AAK adopts the high-pressure solution injection method, weakens the magnetism of the burr with the solution, and then uses the instantaneous impact force of the liquid to not only ensure that the burr of the hydraulic valve block is 100% eradicated, but also effectively clean each part of the hydraulic valve block. Most of its peers do not have such a process. After learning about it, the American customer sent an inquiry sheet for the hydraulic valve block worth US$20,000 within 20 minutes.

Throughout the entire hydraulic valve industry, the deburring of hydraulic valve block is still manual. The work piece is polished with tools such as file, sandpaper and grinding head. This method has blind spots, general effect and low efficiency, especially for the burrs in complex cross holes. Even the later inspection can not find the burr hidden in the hydraulic valve block.

Eric, an American hydraulic valve customer, purchased a batch of hydraulic valve blocks from a hydraulic valve manufacturer some time ago. Problems were found in the test stage. The pressure regulation of the hydraulic system was unbalanced. After careful analysis, it was found that there were different degrees of burrs at the cross holes of the hydraulic valve blocks. After modifying the hydraulic valve block sample several times, the burr could not be 100% eradicated. His client did not accept the quality of the hydraulic valve block, and Eric could only reconsider other manufacturers.

Eric saw an article on deburring treatment of hydraulic valve block of AAK hydraulic valve on B2B website and found that it was similar to his current problems. Eric sent us his hydraulic valve block drawing and the problems encountered by email. He asked us how to deal with the burr problem of hydraulic valve block?

The burr shape and size of the hydraulic valve block are related to the spindle speed, drilling feed, work piece material, cutting tool, coolant, bit geometric angle and other factors. It really needs unique skills to clean it thoroughly. AAK hydraulic valve mainly adopts the high-pressure solution injection method, uses the solution to weaken the magnetism of the burr, and then uses the instantaneous impact force of the liquid to not only ensure that the burr of the hydraulic valve block is 100% eradicated, but also effectively clean each part of the hydraulic valve block, with high efficiency and no dead corner.

Within 20 minutes after Eric received our email reply, he sent an inquiry for the hydraulic valve block worth US$20,000. According to his hydraulic valve block drawings and parameter requirements, we calculated the most advantageous hydraulic valve block price. For a week, we didn't hear any news from Eric. We thought he wouldn't order the hydraulic valve block. But we didn't expect that after 15 days, we received his order for the hydraulic valve block.

Purchase burr free hydraulic valve block, choose AAK hydraulic valve, you can have a try.

AAK pilot hydraulic pressure valve adds welded high-strength filter screen at the inlet section of slender hole, and the damping hole is 100% unblocked. Colin faced 4 times of hydraulic pressure valve approval failures, which were solved at one time by AAK hydraulic valve.

Many hydraulic valve manufacturers believe that the pilot hydraulic pressure valve has fine impurities and is easy to block the pilot stage slender hole, which is determined by the special structure of the hydraulic valve. Therefore, they just remind customers to use high-purity hydraulic oil and never reflect on their production process, resulting in many hydraulic valve customers falling over here.

Colin is the purchasing supervisor of a hydraulic valve company in Germany. He has a batch of orders for pilot hydraulic pressure valves recently. During sample approval stage, it was found that some fine impurities could easily block the pilot stage slender hole, resulting in the blockage of the damping hole, the loss of pressure of the pilot stage and the failure of the pressure valve. The hydraulic pressure valve sample was modified for 4 times, but it was still unapproved. Colin looked for no less than 20 hydraulic valve manufacturers within 7 days, and only got a reply from 3 hydraulic valve manufacturers: they could not make sure that the damping hole was 100% unblocked. The remaining more than 20 hydraulic valve manufacturers did not give any reply at all.

Colin happened to see an article about damping hole blockage of AAK hydraulic valve on B2B website. With a try attitude, he contacted us AAK hydraulic valve and asked about the treatment of damping hole blockage. After we asked him about the parameter requirements and use scenarios of his hydraulic pressure valve, we said there was no problem and could rest assured to proofing.

Colin didn't think too much either. He tried again with the mentality of making every possible effort. Unexpectedly, the pilot hydraulic pressure valve sample made by AAK not only passed the testing but also solved the problem of damping hole blockage, and the pressure debugging was more sensitive and stable. The next day, he transferred the hydraulic pressure valve order to AAK. He wondered why hydraulic pressure valve of AAK proofing passed testing at one time.

In order to deal with severe working conditions more effectively, AAK hydraulic valve reduces the impact of oil pollution on the pressure valve, and has optimized and upgraded the pilot hydraulic pressure valve process for a long time. While improving the oil inlet stability, the welded integral high-strength filter screen and local turbulent self-cleaning function are added to the inlet section of the pilot slender hole, so as to reduce the impact of oil pollution on the normal operation of the hydraulic valve. The opening and overflow characteristics of the hydraulic pressure valve are better, and the pressure curve is less affected by the change of overflow flow, which plays a very good protective role for the system.

With the pilot hydraulic pressure valve produced by AAK, you will never worry about the blockage of the damping hole. You can also try a small order.

Kaden, a hydraulic valve purchaser from the United States, has been successfully purchasing hydraulic valves from China in recent years, and his boss also attaches great importance to him. Last month, at the original hydraulic valve manufacturer, he placed an order for a hydraulic valve block with multi-stage valve spool hole. The manufacturer confirmed that there was no problem and submitted the PPS of hydraulic valve block for 3 times, but the accuracy of valve spool hole was not approved every time. This made his customer very unhappy and thought it was a waste of his time. If the 4th hydraulic valve block sample still could not be approved, the order would have to be cancelled. The boss was also surprised and asked him to solve it within a time limit. Kaden felt unprecedented pressure.

Kaden realized that the current hydraulic valve manufacturer must be replaced and contacted with no less than 10 hydraulic valve manufacturers. No factory has the ability to accept the order of this hydraulic valve block. Because the valve spool hole of this hydraulic valve block had a multi-stage structure, the accuracy was difficult to be controlled, the diameter tolerance of the valve spool hole of the hydraulic valve block was small, and there were many accuracy requirements such as coaxiality.

Kaden was a little frustrated and seemed to have to give up. A hydraulic valve manufacturer in Ningbo told Kaden that the multi-stage valve spool hole must be processed with URMA reaming technology, and AAK hydraulic valve had this technology and could have a try.

Kaden contacted us AAK hydraulic valve, directly indicating that he was introduced to us by a hydraulic valve factory, now he was in trouble with a special hydraulic valve block. He sent us the drawings and parameter requirements of the hydraulic valve block, and asked whether we were sure to be able to produce this hydraulic valve block. After analyzing the drawings, the technical team of AAK hydraulic valve told him that we would send the samples of hydraulic valve block directly to him for testing after 12 days. If the accuracy of hydraulic valve block met the requirements, we could produce it.

Kaden requested that the PPS of the hydraulic valve block must be good so as not to completely disappoint his customer. On the 5th day after receiving the sample, he was very happy to inform us by email that after two tests by his company and his customer, AAK's hydraulic valve block met the requirements. He asked us to prepare materials and production can be started once other details are determined.

AAK hydraulic valve URMA reaming technology adopts guide bar support to ensure correct tool position and rigorous cooling to ensure tool lubrication. Especially for multi-stage valve spool hole, or valve spool hole with small diameter, we have our own processing experience. This is rare in Ningbo hydraulic valve manufacturers. Many times, some peers admire and spontaneously recommend those hydraulic valve customers with this special requirement to us.

After 2 days of discussion, the delivery date and payment terms were confirmed, and Kaden's uneasy heart was finally put down. The boss appreciated his quick resolution of this difficult hydraulic valve block order and gave him a 5-day holiday to relax.

AAK hydraulic valve block, with guaranteed accuracy, you can also have a try.

AAK hydraulic pressure valve has no horn hole. In Ningbo, the hydraulic valve production base, few factories are sure to solve the horn hole. AAK uses automatic programming software to program and upgrade the processing technology of hydraulic valve cavity hole. The geometric tolerance of each hole is within 0.02mm. At the same time, small fillet is used to replace the R angle of our peers to transition, which completely avoids the horn hole.

Most hydraulic valve manufacturers use manual programming to design the geometric tolerance of cavity hole, which is prone to human error and can not be corrected. At the same time, due to the limitation of operation methods, the transition angle between small holes in the hydraulic pressure valve generally adopts the R angle for transition, which is easy to artificially leave a small space that is not easy to detect, so the horn hole will probably appear. After the hydraulic pressure valve is used for a period of time, the horn hole is easy to leak. What's more troublesome is that the oil stain outside the hydraulic pressure valve is easy to enter the valve spool and damage the whole hydraulic system.

Adair, a hydraulic valve purchaser in Scotland, had many contacts with AAK hydraulic valve before, because he pursues low price, there is no cooperation between us. In July this year, he placed an order for hydraulic pressure valve worth 80,000 US dollars to a hydraulic valve manufacturer in Ningbo. 2 months later, the quality of the hydraulic pressure valve failed to meet the standard every time. Adair realized that even if it took another 2 months, the sample still could not be approved. Adair accidentally saw an article from AAK about "horn hole" on the B2B website, he further sourced until he got to the AAK website: www.aakindustry.com, he realized that it was the hydraulic valve manufacturer he had been contacting.

When we received Adair's email, we understood the problems and causes of his hydraulic pressure valve. 3 days later, we received the hydraulic pressure valve samples that he asked the original hydraulic valve manufacturer to send, we found that the processing coaxiality of the cavity hole diameter of the combined holes of these hydraulic pressure valves was between 0.03-0.05mm, and there were tool connecting traces at the transition R angle. After we took the video and sent it to him, he understood why the samples of the original hydraulic valve manufacturer were always not approved.

After receiving the video, Adair transferred the order of this hydraulic pressure valve to us AAK hydraulic valve the next day. At the same time, Adair also joked that you found the problem, but not means that you are able to solve the problem. How does you AAK hydraulic valve do and make me believe that you can 100% solve these hidden problems.

AAK hydraulic valve is good at finding the pain points of traditional process, and is more willing to take time to improve or innovate the production process of hydraulic valve. Many times, the process has been one step ahead of the peers. For example, this hydraulic pressure valve is programmed by automatic programming software, which replaces the manual programming commonly used by our peers. After the hydraulic pressure valve automatically generates the cavity hole, then next step is processed. The geometric tolerance of each hole must be controlled within 0.02mm. If it does not meet the standard, the next step of processing will not be carried out. At the same time, each transition angle between the small holes of the hydraulic pressure valve uses a small fillet to replace the common R angle of our peers. By optimizing the processing parameters of the cartridge hole, the horn hole is completely avoided.

AAK hydraulic pressure valve has no horn hole, feeling at ease to use. You can also try a small order.

Maarten purchased a batch of hydraulic valve blocks some time ago. In the early test, the system parameters were normal. Strangely, 10 days after the hydraulic valve block was started, the hydraulic oil in the system suddenly deteriorated. The technician immediately suspended the operation of the whole test system. After inspection, it was found that there were small iron filings in the hydraulic oil, and the valve spool of the cartridge valve connected with the hydraulic valve block also showed signs of wear. Maarten mentioned these problems to the hydraulic valve manufacturer, but the hydraulic manufacturer asked the customer to use better hydraulic oil and avoided the problem of his own hydraulic valve block. With delivery date approaching, Maarten is very helpless.

Maarten really had no choice but to try to find other suitable hydraulic valve manufacturers on the website to take over the hydraulic valve block order. He consulted no less than 10 manufacturers in a week, but all manufacturers gave the same reply, they could not 100% avoid fine iron filings. This made Maarten start to doubt the ability of the hydraulic valve manufacturers in China.

Before, Maarten had a certain understanding about us AAK hydraulic valve through some B2B websites, so with a try mentality, he directly emailed us a trial order for 5 hydraulic valve blocks. After receiving our hydraulic valve blocks, Maarten tested and compared, he found that AAK hydraulic valve block has strong sealing, high precision and gloss finish. What's more, he was glad that there was no iron filings residue. He immediately sent the drawings, quantity, delivery date and other detailed requirements of the hydraulic valve blocks currently being purchased from the other hydraulic valve manufacturer. After confirming all details with us, he cancelled the order with the original hydraulic valve manufacturer. At this moment, Maarten could finally rest assured.

Why do more than 10 hydraulic valve manufacturers dare not accept the order of this hydraulic valve block? Because this hydraulic valve block is very special. There are many slender holes in the processing channels intersected by each hydraulic valve block, and the cleaning of iron filings is a cumbersome process. If there is no unique skill, it is difficult to eradicate it 100%. 2 years ago, AAK hydraulic valve also had an order cancelled by customer due to the iron filings of hydraulic valve block not completely eradicated. After that lesson, our technical team spent half a year innovating the production process of hydraulic valve block, and finally AAK hydraulic valve was able to mass produce the hydraulic valve without iron filings 1 year ago.

The reason why AAK hydraulic valve block can remove the residual iron filings that can not be achieved by peers is that after the hydraulic valve block is processed, AAK firstly uses high-temperature alkaline water to cook the hydraulic valve block, so that the iron filings of the hydraulic valve block lose demagnetization, and then uses a small pneumatic grinding wheel to clamp the rotary file to go through the hole, so as to completely eliminate possible flash at the corner. Then, the high-pressure washing machine shall carry out high-pressure washing on the dirt on the inner and outer surfaces of the duct. Finally, the industrial endoscope and cold light source shall be used to check the flash and burr at the corner in the duct. If any, point-to-point and high-pressure washing shall be carried out until the iron filings in the hydraulic valve block are completely eradicated.

AAK hydraulic valve block is made with ingenuity. Don't worry about buying and using. You can also try a small order.

The types of hydraulic cartridge valves can be classified from different angles. Sometimes, buyers who purchase hydraulic cartridge valves are confused. After all, they are not engineers. In order to classify more simply and intuitively, AAK HYDRAULIC VALVE describes the types of hydraulic cartridge valves from the most extensive installation point of view. In this way, we can divide the hydraulic cartridge valves into 3 types: Insert-type, Slide-in and Screw-in.

Berge, an old British hydraulic valve customer, was transferred from the quality control department to the import department. He is a very studious buyer. Maybe it's fate, we often discuss some knowledge points about hydraulic valves. Some time ago, he didn't understand that every time, when the domestic hydraulic valve manufacturers receive an inquiry about his hydraulic cartridge valve, they always ask about the type of hydraulic cartridge valve. The question about the type of hydraulic cartridge valve made him very nervous and helpless.

Indeed, there are many types of hydraulic cartridge valves now, from the perspective of function, hole type and scene. We found that they are most commonly classified from the perspective of installation, which is easy to understand and remember. I summarized our hydraulic cartridge valve types to Berge. After reading my following report about the types of the hydraulic cartridge valves, he told me that this classification for the hydraulic cartridge valve types can basically cover more than 80% of the hydraulic cartridge valves. Here, I'll also share with you the types of hydraulic cartridge valves I gave him.

Common types of hydraulic cartridge valves are as follows:

The Insert-type hydraulic cartridge valves: completely enters the inside of the valve block and does not expose any part outside the valve block. It is positioned by its own thread or other components such as pipe joint, snap ring, retaining ring etc. For example, hydraulic check valve and two-way hydraulic flow regulating valve have this design.

The slide-in hydraulic cartridge valves: it does not have installation threads itself, and the valve spool needs to be used together with the cover plate. The valve spool is integrated in the valve block to switch the oil circuit on and off through pressure and spring force. Different cover plates are used to realize direction control, pressure control and flow control.

Screw-in hydraulic cartridge valves, that is, hydraulic threaded cartridge valves, have different brands and different hole types, which are usually unable to be interchanged in installation. At present, there are 3 commonly used pass types: ISO7789, SAE and SUN.

After understanding the above 3 types of hydraulic cartridge valves, you can basically understand the types of hydraulic cartridge valves, and you can also extend other types of hydraulic cartridge valves. These types of hydraulic cartridge valves are related to each other.

AAK HYDRAULIC VALVE uses the most intuitive installation angle to describes the types of hydraulic cartridge valves. If you have any questions about the hydraulic cartridge valves, please leave a message on AAK website. We are at your service at any time.

9 months ago, we received an email from an old customer in the UK, informing that Berge had transferred from the quality control department to the import department. We could see from the email of the young man's self-introduction that he was full of confidence in procurement. Unfortunately, the first hydraulic valve order went wrong. A batch of orders for hydraulic flow valves shipped from a hydraulic valve manufacturer in Ningbo had no problem when tested before leaving the factory. However, when the goods were delivered to customers, the company received a series of quality complaints from consumers in only 1 month, and nearly 20% of the hydraulic flow valves had leakage. The boss was not very happy, and requested Berge to solve the guest's complaints within 1 week.

Berge had discussed with the original hydraulic valve manufacturer several times, but it has not been effectively solved, and he even wanted to resign. Shawn, a former old purchaser, felt his frustration and reminded him to communicate with AAK HYDRAULIC VALVE to see if it could be solved.

We received Berge's email with product drawings, pictures and test data of the defective hydraulic flow valves. We preliminarily judged that there was a problem with the valve spool. In order to solve the problem at one time, Berge asked his hydraulic valve manufacturer to send 5 samples of defective hydraulic flow valves to AAK HYDRAULIC VALVE for thorough inspection.

After receiving the hydraulic flow valve samples, frankly speaking, the main line type of the hydraulic flow valve was acceptable. The problem was that the valve spool deviated from the central axis, resulting in leakage. Of the 5 hydraulic flow valve samples sent, two were in this situation, and the other three were of acceptable quality. This proved what we said before that it was difficult to 100% ensure that the valve spool did not deviate from the central axis due to human error, which was a hidden problem among peers. I suggested him to replenish 40% hydraulic flow valves to their customer within 30 days. If the customer could accept this suggestion, we would give priority to the production of these replenished hydraulic flow valves.

A week later, Berge informed by email that his boss had agreed to the plan and his customer could accept only 20% replenishment. They just repeatedly stressed that the replenishment of the hydraulic flow valve could not have any quality problems.

AAK realized a few years ago that the hydraulic flow valve produced by CNC lathe has high requirements for operators and is prone to human errors, resulting in the deviation of valve spool from the central axis. On the production equipment, AAK HYDRAULIC VALVE have imported the Swiss machine tool with the highest precision to make up for the short board of CNC lathe. At present, less than 10% of the peers have this equipment. It can replace 7 groups of accessories at random. The high-pressure hydraulic flow valve produced by Swiss equipment has high precision, which is at least 20% higher than that of domestic conventional CNC lathe. Not only the precision is high, but also the stability is guaranteed.

Last week, we received Berge's good news email. The customer was very satisfied with the replenishment of the hydraulic flow valve, and the boss was also very happy. Berge also joked with us that it was thanks to us AAK HYDRAULIC VALVE, otherwise he would have changed his job.

AAK hydraulic flow valve, our old customers have been purchasing because of trust. You can also have a try.

Mason, an old customer of hydraulic valves from the United States. In March this year, he was not satisfied with the quotation of one of our hydraulic valve blocks, which was nearly 7% higher than his target price, so he didn't place an order with AAK HYDRAULIC VALVE. Unexpectedly, he sent an email last week asking whether our quotation of hydraulic valve block in March was still valid. We replied that you were our old customer and the price must be valid. Mason also frankly told us that there was a problem with the hydraulic valve blocks he purchased, which made him very headache now.

After communication, we learned that there were no problems in the preliminary test and shipment inspection on the hydraulic valve blocks produced by his previous hydraulic valve manufacturer. In the recent month, users had gradually reported that after setting up and debugging, the surface of the hydraulic valve block fell off paint, rusted, and even there was pollution inside the hydraulic system. Nearly 60% of the 300 hydraulic valve blocks purchased had this situation, and only 40% were still on sale. His boss found something wrong and suspended the sale of the remaining products. The hydraulic valve manufacturer believed that this was caused by the improper use of the hydraulic valve block by the user, and was only willing to replenish 10% of goods to solve this problem. His boss asked him to find a qualified hydraulic valve block supplier as soon as possible.

Because the use scenario of this hydraulic valve block was special, Mason knew that AAK HYDRAULIC VALVE could solve this problem, but his did not have authority to pay a 7% higher price. He contacted no less than 10 hydraulic valve manufacturers, and only 3 of them replied. They could solve the paint falling and rust spots on the surface of the hydraulic valve block, but the internal pollution could not be 100% avoided because they did not know the user's operation. The remaining hydraulic valve manufacturers did not give any reply at all.

Mason was very helpless. He had to bite the bullet and asked his boss for help if the purchasing price could be raised. When his boss learned about the whole purchase process, he asked Mason, why he did not report this situation in March?

After the delivery date provided by AAK HYDRAULIC VALVE was agreed by his users, Mason sent us the order for this hydraulic valve block, and asked us to ship as early as possible. At the same time, his boss was curious about how we did it.

The anti-rust treatment of AAK hydraulic valve block in the past is the same as that in other factories, which adopts surface painting or conventional electroplating treatment. The pain point of this process is that the hydraulic valve block is easy to be scratched, causing corrosion and increasing system pollution. We understand these potential problems of this process, and our technical team adheres to the new process exploration, so that AAK now has its own unique anti-rust technology. With the increasing requirements for product aesthetics and pollution control, AAK HYDRAULIC VALVE has its own proprietary anti-rust treatment technology, it electroplates a 0.02 ~ 0.03 mm thick special coating on the surface of the hydraulic valve block. This coating has excellent adsorption, not easy to fall off and also bright appearance. Only on this point, AAK has crushed most peers.

For the production of hydraulic valve block, AAK has proprietary anti-rust technology, which is enough to reassure you. You can have a small try.

Alston is the purchaser of a British hydraulic valve company. He has been purchasing hydraulic valves in Ningbo for 3 years and has been very smooth. Last month, he purchased a batch of hydraulic pressure valves. During the sample approval process, the automatic pressure regulation of the hydraulic pressure valves was not very stable. The hydraulic valve manufacturer checked again and again, but still could not find the reason. Alston had a headache.

Alston realized that he has to look for a new hydraulic valve manufacturer to try, otherwise the order would go away. When he sent the detected data and parameter requirements to the hydraulic valve manufacturers he had previously contacted, only one manufacturer told him that it was the problem with the pressure spring material or the processing process, but because of power limitation, he has no time to produce this hydraulic pressure valve order. The other manufacturers replied that they need to make samples first before they knew the results.

Alston felt the pressure. Coincidentally, he heard that the AAK HYDRAULIC VALVE paid great attention to the pressure spring. When we received his email, we understood that this hydraulic pressure valve has very high requirements for automatic adjustment of the pressure spring. We produced and supplied a batch of similar designs to a Russian customer as early as 2 years ago, so we sent him pictures of similar hydraulic pressure valves.

Alston felt that AAK HYDRAULIC VALVE could solve this dilemma and asked how long it would take to produce 1000 hydraulic pressure valves. We advised that the delivery time depends on the production time for the pressure spring, because of power limitation, the production capacity of the pressure spring is very low. According to the warehouse inventory, there are 440 inventories. For the remaining 600, according to the current power consumption, we conservatively estimate that it will take an additional 45-55 days. Therefore, only 400 hydraulic pressure valves can be shipped to him, and the remaining 40 pressure springs should be reserved for make samples for other customers.

For this pressure spring, most of our peers use carbon steel, which will cause the plasticity and toughness of this valve spool to be very general, the tensile strength is relatively weak, and the stability is difficult to control. There is no problem to use it for the general quality requirements.

As early as 5 or 6 years ago, AAK has replaced the carbon steel pressure spring with the piano steel wire pressure spring imported from South Korea. There were only a few manufacturers using it in the whole hydraulic industry in Ningbo. The piano steel wire pressure spring imported from Korea has high strength, good elasticity, fatigue resistance, creep resistance and toughness, smooth and clean surface, strong anti rust ability, specified tensile strength and torsional performance, and there will be no cracks, folds, scars, tensile cracks and corrosion on the surface.

AAK hydraulic pressure valves, with imported piano steel wire pressure spring, can be used with peace of mind. You are courage to try a small order.

Under the pressure and flow conditions, AAK hydraulic valve effectively controls the sealing ring of each hydraulic valve, so it always ensures that the flow parameters in the hydraulic directional valve system are at the normal value. Only a small detail of the sealing ring has made the reputation of AAK hydraulic valve exceed that of many domestic and foreign peers. I will not modest about this.

Many hydraulic valve manufacturers are used to domestic sales and are used to dogmatic production. Maybe they can copy the production process of their peers and continue to use some traditional technologies, but they may be helpless on the details or hidden problems of some spare parts.

Leo, an old customer, suddenly sent me 3 samples of hydraulic directional valve some time ago. I didn't receive any email about these samples of hydraulic directional valve in advance. So I thought Leo asked us to offer a quotation.

After receiving the hydraulic directional valve samples, I asked him by e-mail how many quantities he needs and what scenario this hydraulic directional valve will be used, then I would give him the plan of this hydraulic directional valve. However, Leo didn't need my quotation, just let me judge the quality of these hydraulic directional valves. Sending samples to let me just see the quality without doing other actions. This was the first time I had met.

After testing these hydraulic directional valve samples, AAK HYDRAULIC VALVE technical team found the overall quality was good. The only hidden danger was that the flow parameters of one of the hydraulic directional valves were a little unstable, which should be adjustable in use. I directly told Leo that these hydraulic directional valves were qualified, but he should pay attention to flow adjustment during use. Leo's email reply surprised me again. Leo said that no wonder he stumbled in purchasing these hydraulic directional valves. Even AAK HYDRAULIC VALVE couldn't find problems with these hydraulic directional valves.

I angrily asked the technical team to test these hydraulic directional valves again and simulate the use scenario of Leo's hydraulic directional valve under the pressurization and flow scenario. The test report came out soon. There were problems with the sealing rings of these hydraulic directional valves. Leo was relieved when he learned of the result and found the root of the problem. 30% of the hydraulic directional valves he purchased this time had the problem of flow parameters lower than the standard parameter values required by customers. His hydraulic valve manufacturer had been unable to find the root cause of the problem. He never thought it was caused by the mismatch of sealing rings. The traditional nitrile rubber sealing rings were not suitable for hydraulic scenes.

I told Leo that nearly 90% of the domestic hydraulic valve manufacturers use either silicone sealing rings or nitrile rubber sealing rings. They rarely think about different media, different hydraulic scenes, and adjust the appropriate sealing rings according to the media. They just follow the market and use what other people use. We AAK HYDRAULIC VALVE, as early as 5 years ago, had conducted material analysis for this technical pain point. After comparison, we specified different parameter requirements, different media and different scenarios to correspond to different material sealing rings. For example, the sealing performance and stability of fluororubber sealing ring are most suitable for the hydraulic directional valve required by Leo’s customer.

AAK hydraulic directional valve has details and targeted technology. You can try a small order.

The hydraulic needle valves produced by AAK has no leakage and its stability exceeds that of most of its hydraulic valve peers, enabling a foreign trade company in Guangdong to save a major global top 500 customer. The key is that AAK adopts high-precision processing equipment imported from Switzerland to produce hydraulic needle valves. At present, there are less than 5 hydraulic valve manufacturers with such high configuration in the hometown of hydraulic valves in Ningbo.

Most hydraulic valve manufacturers use CNC lathe to produce hydraulic needle valves. The hydraulic needle valves made by CNC lathe has high technical requirements for operators and is prone to human errors, such as the valve spool deviates from the central axis. Because of human error, the hydraulic needle valve leaks, and it is not easy to judge which part has the problem.

At the end of last year, Mr. Wang, the general manager of a hydraulic valve export company in Shanghai, received complaints from major customers about the several batches of hydraulic needle valves, which made them in a mess. Under the introduction of friends, he came to our company and brought those hydraulic needle valve samples with problems. After inspection, it is found that the main line of the hydraulic needle valve is offset, and the valve spool deviates from the central axis. I told him that this problem is easy to solve and also easy to cause problems. Only with a better CNC lathe can it be guaranteed. We provided him the test data of AAK hydraulic needle valves for comparison, and also asked him to take several hydraulic needle valve samples at random and send them to his customer to compare with the domestic peers.

More than half a year later, there was still no reply from Mr. Wang. I didn't know how difficult it was for a top 500 enterprise to place a new order until I had a telephone communication with Manager Wang for more than 30 minutes last week. After Mr. Wang went back last time, he wanted to send the samples of AAK hydraulic needle valves to the major foreign customer, a global top 500 enterprises. At first, the customer refused until their overseas colleagues came to visit with the samples of the hydraulic needle valve to test the samples together on site. After the test, the customer was very satisfied with the quality of the hydraulic needle valve samples, which not only had good surface gloss, high precision, but also had strong sealing performance. Customer is willing to place a trial order first. As long as the quality of the mass production is the same as the samples brought, they can continue to purchase all kinds of hydraulic valves from their company. Mr. Wang asked us to work together to keep this global top 500 customer.

In order to achieve zero leakage of the hydraulic needle valve, AAK HYDRAULIC VALVE has imported the highest precision production equipment from Swiss to make up for the short board of CNC lathe. At present, less than 10% of the peers have this equipment. It can replace 7 groups of accessories at random. The high-pressure hydraulic needle valve produced by Swiss equipment has high precision, which is at least 20% higher than that of domestic conventional CNC lathe. Not only high precision, but also stability.

The zero leakage AAK hydraulic needle valve is being used by global top 500 enterprises. You can also try an order.

Hydraulic directional control valve troubleshooting, in only half of the time given by Leo, AAK HYDRAULIC VALVE used Fluororubber Sealing Ring and solved the problem of the hydraulic directional control valve troubleshooting that the other hydraulic valve manufacturers have not been able to solve, so that Leo can sleep at ease.

This morning, just after reading the emails in the office and preparing for a cup of coffee, my colleague forwarded me an international express. I was a little surprised that there was no parcel notice from any customer, who sent the hydraulic valves to AAK?

Will it be a complaint? I haven't met this for several years. I opened the package in fear. There are 5 new hydraulic valves inside. After simple inspection, they should be hydraulic directional valves. Looking at the sending address and person, it turns out that it belongs to the old customer Leo. This guy likes to make this sudden attack.

Open the face book and I ask him, these are hydraulic directional valves. What do you need me to do? Leo said, hydraulic directional control valve troubleshooting, can you do it? I'm not good at the hydraulic directional control valve troubleshooting. He didn't reply. I immediately joked that I'm not good at the hydraulic directional control valve troubleshooting, which doesn't mean that AAK HYDRAULIC VALVE is also not good at the hydraulic directional control valve troubleshooting. AAK HYDRAULIC VALVE valve has its own technical team, which can help you on the hydraulic directional control valve troubleshooting.

Leo commanded that I have 3 hours to go to bed. Give you 2.5 hours to finish the hydraulic directional control valve troubleshooting. I need to know where the hydraulic directional control valve troubles are and your solutions to the hydraulic directional control valve troubleshooting.

After learning about his use scenarios of these hydraulic directional valves and media, I immediately asked AAK HYDRAULIC VALVE technical team to finish the hydraulic directional control valve troubleshooting within 2 hours. The AAK HYDRAULIC VALVE technical team simulated the use scenario of Leo's hydraulic directional valves under the pressurization and flow scenario. The test report came out soon. There were problems with the sealing rings of these hydraulic directional valves. At the same time, we suggested him use Fluororubber sealing ring to seal this hydraulic directional valve.

We took 1.5 hours to finish the hydraulic directional control valve troubleshooting, which is just half of the time given by Leo. After learning the result, Leo was relieved and could sleep at ease.
The story turned out to be this: Leo purchased some hydraulic directional valves, 30% of the hydraulic directional valves have flow parameter problems. The hydraulic valve manufacturer has not been able to have solutions to the hydraulic directional control valve troubleshooting. The boss is very unhappy.

I told Leo that nearly 90% of the domestic hydraulic valve manufacturers use either silicone sealing rings or nitrile rubber sealing rings. They rarely think about different media and different hydraulic scenes or use the appropriate sealing rings according to the media. They all follow the market, just use what other people use. We AAK HYDRAULIC VALVE, as early as 5 years ago, have carried out material analysis for the pain points of sealing rings. After comparison, we have formulated different parameter requirements, different media and different scenarios to correspond to sealing rings of different materials. For example, the sealing performance and stability of fluororubber sealing ring are most suitable for the hydraulic directional valves purchased by Leo.

AAK has targeted Technology on the hydraulic directional control valve troubleshooting, contact AAK if you have needs for the hydraulic directional control valve troubleshooting.

Patrick, an old customer in the Netherlands, used to buy our hydraulic cartridge valves. In the first half of the year, he purchased a batch of hydraulic valve blocks from another hydraulic valve manufacturer, but he had received a strange complaint from users in recent weeks. The hydraulic oil deteriorated suddenly. After stopping the machine to check the hydraulic oil, it was found that there were small iron filings inside the oil. After disassembling the whole hydraulic valve, it was found that the valve spool also showed signs of wear. The customer judged that there were iron filings in this batch of hydraulic valve blocks.

Patrick discussed with the hydraulic valve block manufacturer about how to deal with this quality complaint. The manufacturer replied that it was the problem of hydraulic oil, not the hydraulic valve block. So this problem was stuck here. Patrick emailed me and asked if I knew this hydraulic valve block manufacturer and whether I could mediate and solve the problem.

When I received the drawings of the hydraulic valve block purchased by Patrick this time, I felt that the iron filings probably came from the hydraulic valve block, because the intersecting processing channels of this hydraulic valve block were complex. With Patrick's appeal, I went to the hydraulic valve block factory. The overall feeling of the factory was still good, but the cleaning process before hydraulic valve block packaging did not accord with the process and details in my mind.

When I came back, I emailed Patrick. The manufacturer should understand that the problem of iron filings lay with them. However, according to the current iron filings removal process in this factory, even if replenishment, it was difficult to completely avoid iron filings. So he didn't want to reproduce and couldn't solve the problem, he had to perfunctory your demands.

Patrick didn't reply to my email for 2 days. When I asked him what else he needed me to do in this matter, he said that he had a big headache these 2 days. The boss asked him to find a new hydraulic valve block manufacturer to replenish part of the hydraulic valve blocks to take care of the customer's dissatisfaction with quality. I reminded him that there were few hydraulic valve manufacturers that could do this type of hydraulic valves with many slender holes. AAK HYDRAULIC VALVE solved a similar problem of iron filings of hydraulic valve block last month, and I sent him the pictures of hydraulic valve block for reference.

The next day, Patrick asked us how long it would take to produce 200 hydraulic valve blocks, which was the minimum replenishment quantity required by the customer. When the replenishment order was confirmed, Patrick was relieved.

How does AAK hydraulic valve remove iron filings from hydraulic valve block? Firstly, the hydraulic valve block is boiled with high-temperature alkaline water to make the iron filings of the hydraulic valve block lose magnetism, and then the pneumatic small grinding wheel is used to clamp the rotary file to go through the channel once, so as to completely eradicate the possible flash at the corner, and then the high-pressure washing machine is used to wash the dirt on the inner and outer surfaces of the channel under high pressure. Finally, the industrial endoscope and cold light source are used to check the flash burr, then point-to-point high-pressure flushing until the fixed iron filings in the hydraulic valve block are completely eradicated.

AAK has unique skills in dealing with iron filings residue in hydraulic valve block. You can also try a small order.

5 years ago, AAK hydraulic pressure valves started to use 100% Korean piano steel wire as the pressure spring of hydraulic valves, while only a few hydraulic valve manufacturers in Ningbo were using it. Russian customer Natalia placed an order 3 months after receiving our hydraulic pressure valve samples. Finally, AAK HYDRAULIC VALVE became Natalia's only hydraulic valve supplier in Ningbo.

Most hydraulic valve manufacturers use carbon steel, which is cheap and widely used, as the valve spool of hydraulic valves. This pressure spring has good hardness, but its plasticity and toughness are very general, its tensile strength is relatively weak and its stability is difficult to control. After the hydraulic pressure valves being used for a period of time, the pressure may not be adjustable.

Natalia, a Russian customer, purchased hydraulic pressure valves from Ningbo last year. There was a problem with the automatic pressure regulation. She received many complaints from her customers. Natalia contacted more than 10 hydraulic valve manufacturers, but all the pressure springs from them were not up to standard. Natalia thought of AAK HYDRAULIC VALVE, which may be able to solve this problem. When we received the hydraulic pressure valve drawing from Natalia, she repeatedly stressed the quality of the pressure spring. After discussion, the technical team of AAK HYDRAULIC VALVE promised to send the approval sample of hydraulic pressure valve within 12 days.

After we sent the hydraulic pressure valve sample, Natalia only confirmed the receipt and asked us to wait for her comparison results. We have been waiting for 3 months, during which time we sent an email to her, but didn't get a reply, so we held this hydraulic pressure valve.

The day before our National Day holiday, I was a little surprised when I received an email from Natalia for the hydraulic pressure valve order. In the following conversation, we learned that she had not only asked us AAK HYDRAULIC VALVE factory to make samples. She contacted with more than 10 hydraulic valve manufacturers totally, and asked 3 manufacturers to make samples and send the samples to their company for testing. The company tested every components and the circulation of the whole hydraulic system. We AAK HYDRAULIC VALVE and another hydraulic valve manufacturer from Guangdong were shortlisted. However, the pressure spring of AAK hydraulic pressure valve has unique skills, and its tensile test parameters are the best. Natalia chose AAK HYDRAULIC VALVE finally. She said that if the quality of this order is no problem, AAK HYDRAULIC VALVE will be their only hydraulic valve supplier in Ningbo in the future.

AAK hydraulic valves have always used piano steel wire pressure spring imported from Korea. The material has high strength, good elasticity, fatigue resistance, creep resistance and toughness, smooth and clean surface, strong anti rust ability, specified tensile strength and torsional performance, and the surface will not have cracks, folds, scabs, tensile cracks and corrosion.

AAK hydraulic valves are not the common quality in the market, but it is the one that is difficult for you to find several hydraulic valve manufacturers in China that can be compared with us. It's not because we are pride, we're more honest and just tell the truth. You can also try a small order.

AAK HYDRAULIC VALVE factory is equipped with high-precision imported CNC lathes and honing machines, designed many small fixtures and special processing equipment for assembly, the production efficiency is 30% higher than that of its peers. Moreover, AAK never cheat customers, ensure quality and delivery time, customer Steven doesn't want to find a second supplier anymore.

For the foreign trade hydraulic valve orders, delivery time is very important and critical. The domestic hydraulic valve manufacturers are used to domestic sales. They are not too serious about the delivery date, the production is slow and the workers get off work at the fixed time. If it is urgent, nearly 90% of the hydraulic valve manufacturers will choose outsourcing processing. Different hydraulic valve manufacturers have different quality levels, so the quality of the hydraulic valves is uneven and the delivery time may still be delayed. Choose such a hydraulic valve manufacturer, the full quantity is not guaranteed, and the quality is also difficult to count on.

At the beginning of 2020, one of our old customers introduced the American customer Steven to AAK HYDRAULIC VALVE. Steven mainly purchased many hydraulic check valves in the past 2 years. In previous years, he purchased hydraulic check valves in their country. Only the year before last, he started to develop hydraulic valve suppliers in Ningbo and Guangdong. He encountered problems. Some hydraulic check valve manufacturers have limited equipment, production does not conform to the process, and the accuracy of hydraulic valves is unstable, so they have been afraid to place orders.

Steven learned from our website and the communication that AAK HYDRAULIC VALVE has several high-precision imported CNC lathes and many small processing equipment, the production line operates 24 hours, and the hydraulic valve technicians take two shifts, each process has strict operation standards, and the output can be 30% higher than that of peers. At the same time, it can ensure the quality of hydraulic valves.

Steven placed an order for hydraulic check valves of more than 20,000 US dollars with AAK. It takes only 30 days for AAK HYDRALUIC VALVE to complete the order, because it is the first cooperation, he especially gave us 45 days to produce these hydraulic check valves and required that the delivery date cannot be postponed and the accuracy must meet the requirements.

After 25 days, the mass production of the hydraulic check valves was completed 35 days in advance. Steven was a little surprised at the productivity of our hydraulic check valves. 2 months after he received the shipments, he sent us an email that his customers were very satisfied with the quality of the hydraulic check valves, which can be compared with #sun hydraulic #. Steven is pleased to tell us that in Ningbo, he will no longer consider looking for a second hydraulic check valve supplier.

AAK HYDRAULIC VALVE is not only willing to spend a lot of money on equipment, but also willing to spend money on technological innovation. The key is that AAK HYDRAULIC VALVE never makes cheat customers. The production line operates for 24h, with high capacity and quality. Its quality is comparable with the international first-line hydraulic valve brands. The world's top 500 enterprises also like the #hydraulic check valves# produced by AAK.

Guaranteed Quality, Quantity and Delivery, AAK HYDRAULIC VALVE never cheat, which saves you worry and rest assured.

In Ningbo, the hometown of hydraulic valves, conservatively speaking, there are more than 100 hydraulic cartridge valve manufacturers. 4 years ago, we began to contact HydraForce. AAK HYDRALUC VALVE lasted 2 years, replaced hydraulic valve materials 3 times and proofed 4 times, becoming the first hydraulic cartridge valve manufacturer supplier of HydraForce valves among so many hydraulic cartridge valve manufacturers in Ningbo.

4 years ago, I received a call from President Li, who is the agent of HydraForce valves in China. He said that from the hydraulic cartridge valve manufacturers in Ningbo, he heard that AAK HYDRAULIC VALVE have invested a lot of equipment and constantly innovated technology, and has a good benchmark in Ningbo among hydraulic cartridge valve manufacturers and asked if we are not interested in becoming a supplier of HydraForce valves.

Everyone wants to cooperate with top 500 enterprises in the world. While agreeing, I am also a little nervous. I am worried that if the quality of hydraulic valves does not meet the standard, we would make jokes among these hydraulic cartridge valve manufacturers in Ningbo.

The first entry point between us and hydraforce valves is a hydraulic cartridge valve. The AAK HYDRAULIC VALVE technical team spent 33 days and sent the approval sample of the hydraulic cartridge valve. We soon got a reply from HydraForce valves. They asked us to re-make sample, listed us those parameters to be improved, and also gave us some encouragement. At present, AAK HYDRAULIC VALVE parameters are among the top 3 of the hydraulic cartridge valve manufacturers in Ningbo.

Since AAK HYDAULIC VALVE can represent the manufacturer of hydraulic cartridge valve in Ningbo, we must continue to overcome difficulties until the sample of hydraulic cartridge valve is approved. We constantly tested imported materials, replaced imported machine tools with higher precision, designed different fixtures, and assembled special equipment required for proofing. The 4th hydraulic cartridge valve has finally been recognized by HydraForce valves, and has also been affirmed by hydraulic cartridge valve manufacturers in Ningbo.

AAK HYDRAULIC VALVE, in 2 years, replaced hydraulic valve materials 3 times and proofed 4 times, became the first hydraulic cartridge valve supplier of HydraForce valves among so many hydraulic cartridge valve manufacturers in Ningbo.

HydraForce valves, one of the world's top 500 enterprises, recognized that AAK HYDRAULIC VALVE is a high-quality hydraulic cartridge valve manufacturer. If you need a hydraulic cartridge valve manufacturer, please click AAK HYDRAULIC VALVE website

Most of the technologies of AAK HYDRAULIC VALVE are in the TOP 1-6 among over 200 hydraulic valve manufacturers in Ningbo. We have supplied hydraulic valves to 3 global TOP 500 enterprises. There may be no 2^nd Hydraulic valve manufacturer like AAK in Ningbo.

Last night, I had nothing to do, so I remembered that I hadn't talked to Ron for several weeks. I asked him on WeChat first "Is it convenient to talk?". 5 minutes later, Ron called me. I asked Ron if there had been any problem with the AAK HYDRAULIC VALVE service in the past more than 1 month. If there was anything we hadn't done enough, please leave a message at any time. Ron said that he liked hydraulic valve manufacturer like AAK because it made him feel very safe. I asked him curiously why he said so.

Ron said, “The standard for me to choose a hydraulic valve manufacturer is whether the hydraulic valve manufacturer can reassure me. Because we Americans think when the matter is handed over to the hydraulic valve manufacturer, it means that the matter is over. We just need to wait for the result. For example, I place an order to the hydraulic valve manufacturer, which means that the work of my order to the hydraulic valve manufacturer has been completed. I just wait for the goods receipt."

Ron went on to say, "For hydraulic valve manufacturer like you AAK, report everything. I still remember the first order I placed with AAK 3 years ago. When the sample sending time was approaching, you reported to me when the sample would be sent. After the PPS of hydraulic valve was sent, you reported me when I could expect to receive the PPS of hydraulic valve. On another occasion, due to the environmental protection, the sending of samples had to be delayed. You also gave me a detailed report on what problems AAK HYDRAULIC VALVE encountered, the new solutions and new sample sending date. These all are my judgments on the details of hydraulic valve manufacturers as the buyer of hydraulic valves. In my mind, AAK is the most detailed hydraulic valve manufacturer."

I asked about the quality of the hydraulic valves we recently shipped. Ron said that he was not too worried about the quality of AAK HYDRAULIC VALVE manufacturer. The 3 global TOP 500 enterprises recognize the quality of AAK hydraulic valves. As long as there is no human error in the production of AAK HYDRAULIC VALVE manufacturer, the quality will be guaranteed.

After talking for more than half an hour, Ron gave me a good lesson. It's difficult to do business with Americans. But if you do the details well, it's not difficult. The sense of service, time and quality are very important. Ron finally said, "AAK moved me with the quality I didn't expect and retained me with the details. It took the least time to purchase hydraulic valves from AAK and get assured quality. Who doesn't like such a hydraulic valve manufacturer?"

After the call, I also felt the pressure. If there were problems in the details in the future, it would certainly affect Ron's judgment on what kind of hydraulic valve manufacturer AAK is. Today, I once again stressed with the whole sales team that we should pick up details one by one. If there are any problems, report the customers in advance.

AAK is an excellent representative of hydraulic valve manufacturers in Ningbo. Hydraulic valve manufacturers like AAK, you may not be able to find the 2nd one in Ningbo. If you need to find a new hydraulic valve manufacturer, please click AAK HYDRAULIC VALVE website

In Google, enter the types of hydraulic valves, and you can get a series of information about the types of hydraulic valves. It looks like that each description about the types of hydraulic valves are all right. This makes Berge a very big headache. He transferred from the quality control department to the import department. He is a very studious buyer. Every time, when domestic hydraulic valve manufacturers in China receive his design drawings, they ask a lot of questions about the types of hydraulic valves.

Berge asked me how to clearly understand the types of hydraulic valves expressed by hydraulic valve manufacturers and how AAK classifies the types of hydraulic valves. I gave him an example. If there are a pile of chairs there with various shapes and materials, how should we classify them? Firstly divide the same kind of materials together, and then classify them for the second time to put different shapes together. This simple dichotomy is also suitable for the types of hydraulic valves.

What is a hydraulic valve? It is a hydraulic element used to control liquid pressure, flow and direction in hydraulic transmission. Let’s classify the types of hydraulic valves for the first step:

A. The types of hydraulic valves are divided into 3 categories according to their functions: directional control valve (such as one-way valve, reversing valve etc.), pressure control valve (such as relief valve, sequence valve, pressure reducing valve etc.), flow control valve (such as throttle valve, speed regulating valve etc.).

B. According to the operation, the types of hydraulic valves are divided into manual valve, motorized valve, electric valve, hydraulic valve etc..

C. According to the control, the types of hydraulic valves are divided into Control valve, Cartridge valve and sandwich plate valve.

D. According to the installation, the types of hydraulic valves are divided into threaded connection valve, plate connection valve, integrated connection valve, Superposition valve and cartridge valve

Then, let’s classify the types of hydraulic valves for the second step. From above A category, if according to the installation, you will get the sub-category of the types of hydraulic valves, for example, the threaded hydraulic pressure valve.

Berge understood the dichotomy of the type of hydraulic valves immediately, especially dividing them by using chairs as example, which is very practical. As soon as you listen and compare, you will understand, and can well understand the various questions about the types of hydraulic valves from different hydraulic valve manufacturers.

In this way, the types of hydraulic valves are summarized from different angles. Combined with the dichotomy of the types of hydraulic valves, the types of hydraulic cartridge valves are basically clear, and they are interconnected and integrated. AAK HYDRAULIC VALVE can express any complex question about hydraulic valve to you with "analogy". You can not only understand it, but also use it.

AAK HYDRAULIC VALVE, describe the types of hydraulic valves in the most landing way. If you have any questions about cartridge valves, please leave a message on AAK website www.aakindustry.com. We are always at your service. If you have any difficulties about the hydraulic valve, contact AAK HYDRAULIC VALVE.

In addition, AAK adopts its own proprietary quenching and tempering heat treatment process to ensure the service life of hydraulic valves. If you also have some confusion about the service life of hydraulic valves, feel free to contact us.

A tiny detail of the hydraulic check valve symbol direction is wrong, which put the hydraulic check valve manufacturer in a very difficult position, the factory is almost closed. There is a devil in the details. Whether you can grasp the devil of the hydraulic check valve symbol requires you to think every day, in addition to hydraulic check valve, hydraulic check valve, and still hydraulic check valve.

When I opened the mailbox, I saw the e-mail of Adair who we had known for 3 years. There was a habit with Adair. He purchases only one type of hydraulic valves from each one hydraulic valve manufacturer. We AAK HYDRAULIC VALVE has been his supplier for the hydraulic pressure valves. After reading the email, it was actually a proofing request for a hydraulic check valve, not a hydraulic pressure valve. It was a little abnormal. I thought he sent the wrong email.

I reminded him whether the e-mail was sent by mistake. He said bluntly that he would need 3 samples of the hydraulic check valve as soon as possible, according to the drawings in his email. Somehow, I always felt there was a problem somewhere, and I went to see the drawing of the hydraulic check valve. It is found that in the layout at the bottom of the drawing, the arrow direction on the hydraulic check valve symbol is reversed. For the hydraulic check valve symbol, the arrow direction is reversed, which is fatal. It seems that a designer is unlikely to make such a low-level mistake.

When the technical team got the drawing and started proofing, they called me. The hydraulic check valve symbol on the drawing seemed wrong. I'm glad they can also find that there is an objection to the hydraulic check valve symbol. I asked what they think of the hydraulic check valve symbol. They suggested making two sets of samples, one according to the hydraulic check valve symbol on the customer's drawing, and the other is for the hydraulic check valve symbol we understand.

When Adair received two sets of samples, he deliberately asked why they were two sets of samples. When we pointed out the details of the hydraulic check valve symbol, Adair began to tell me the devil's story of the hydraulic check valve symbol.

6 months ago, he sent his hydraulic valve manufacturer the drawing with this hydraulic check valve symbol, which was made by their chief designer overnight. The hydraulic valve manufacturer proofed according to this drawing. As a result, the hydraulic check valve sample was also approved at one time. The devil began to make trouble from this time. The 2,000 hydraulic check valves were produced and shipped to his customer. The customer is testing a new production line and needs to use these hydraulic check valves. After installation, there is a big problem in startup and commissioning. Because of the wrong direction, the medium returned, polluting the whole new production line, and directly causing a loss of more than 260,000 US dollars. The customer sent the loss list to his boss, who asked the hydraulic valve manufacturer to bear it.

The hydraulic valve manufacturer quickly found out the reason, but did not dare to directly tell the boss that this is the problem that the hydraulic check valve symbol on your drawings is wrongly marked. If offended the designer, there will be even no opportunity to quote in the future. Now the hydraulic valve manufacturer is in a dilemma. Bear the loss, the number is large. Not to bear the loss, they only have this only customer, Adair’s company.

Who would have thought that this hydraulic check valve symbol butterfly wings directly incited the loss of more than 260,000 US dollars across the Atlantic. When the devil comes out, it seems difficult to find a way to the best of both worlds. The only way is to keep the devil in a bottle.

AAK knows that there is a devil when looking at the hydraulic check valve symbol. If there is any problem with the hydraulic check valve symbol, please contact AAK HYDRAULIC VALVE

AAK HYDRAULIC VALVE has grown for 15 years, as one in the group of hydraulic valve suppliers in Ningbo. The supply of hydraulic valves has reached its peak and trough, but we always remember that we are a hydraulic valve supplier. I believe that as long as we don't give up and do hydraulic valves all our life, AAK will become the best hydraulic valve supplier. Our hydraulic valves have been supplied to 3 of the world's top 500 Enterprises. There may be no second such hydraulic valve factory among the Ningbo based hydraulic valve suppliers.

Angelo, an American customer from top 500 enterprises, was introduced to AAK HYDRAULIC VALVE by a friend. He needed to make a sample of a hydraulic pressure valve for his customer to test new equipment. According to Angelo, he successively contacted no less than 10 hydraulic valve suppliers. After 2 rounds of elimination, 3 hydraulic valve suppliers were selected for proofing. The hydraulic pressure valve samples produced by 3 hydraulic valve suppliers had some leakage, vibration and noise under different working conditions. His customer was not satisfied with the samples from these hydraulic valve suppliers.

The customer asked him to find an American hydraulic valve supplier. Considering the high cost of American hydraulic valve suppliers, he still wanted to try the hydraulic valve suppliers in China. If a qualified hydraulic valve supplier still couldn't be found, he had to give up.

Due to equipment limitations, if the requirements of working conditions are relatively high, the hydraulic pressure valves produced by most China hydraulic valve suppliers will have the problems mentioned above. The fundamental reason is that the accuracy of hydraulic pressure valve is not enough. Generally, the ordinary hydraulic valve suppliers cannot do this high-precision hydraulic pressure valve.

The accuracy of hydraulic pressure valve has always been a hard index of AAK. AAK is not only equipped with high-precision machine tools, but also with special equipment. AAK HYDRAULIC VALVE has many high-precision imported CNC lathes and honing machines, as well as many small AAK designed fixtures and assembled special processing equipment. Each equipment has operation instructions to eliminate human errors. For the coarse grinding in the early stage to the fine grinding in the later stage, at least 3 times of repeated debugging and testing shall be carried out until the accuracy index requirements are fully met. In Ningbo, it is difficult to find a second such hydraulic valve supplier.

Angelo realized the difference between AAK HYDRAULIC VALVE and other hydraulic valve suppliers. A week later, we delivered the samples according to the product accuracy required by Angelo. His customers recognized the accuracy of the hydraulic pressure valve in 3 days after receiving the samples. Angelo was satisfied and said that AAK would be his preferred hydraulic valve supplier in Ningbo.

AAK hydraulic valve has hard indicators and strict requirements. We aim to be the most trusted hydraulic valve supplier, or not to do. If you want to find a hydraulic valve supplier with high requirements, just contact AAK,

The hydraulic directional valves produced by AAK adopts its own proprietary quenching and tempering heat treatment process, which can greatly improve the strength of the hydraulic directional valve, avoid deformation and wear of the hydraulic directional valve in the long-term use process, and significantly increase the service life. Perhaps there is no second comparable manufacturer in Ningbo like this. At most, 10% of the domestic hydraulic valve peers can compete.

In order to win orders, 50% of the hydraulic valve manufacturers do not do any heat treatment to the materials for the hydraulic parts. Although some hydraulic valve manufacturers insist on heat treatment, they can only be outsourced processing due to without equipment. There are also 20% of hydraulic valve manufacturers, who do not have a fixed outsourced processing place, so it is impossible to ensure the heat treatment quality, not to mention the stability. Due to these common problems in the hydraulic valve industry, the hydraulic valve will show many problems after being used for a period of time, such as product deformation and wear. Once the hydraulic valve is deformed, it will easily to be blocked and the service life of the hydraulic valve will be greatly shorten.

5 months ago, Mike, a hydraulic valve customer in the United States, came to me. He had been confused, since 2019, there have been continuous customer complaints about the hydraulic directional valve he purchased. All the complaints are that after the hydraulic directional valve has been used for a period of time, some hydraulic directional valves are deformed and some hydraulic directional valves are worn quickly.

Obviously, there is a problem with the heat treatment of the materials used in the hydraulic directional valve. Since 2019, due to the environmental protection policy, the domestic heat treatment plants have been vigorously rectified, and there are much fewer processing places. 50% of the hydraulic valve manufacturers do not have a place to do heat treatment to the raw materials. Even if heat treatment is done, 20% of the hydraulic valve manufacturers have to change the processing places for each external processing. I sent him several samples of AAK hydraulic directional valve and told him that the material hardness of our hydraulic directional valve has not changed, which always can reach about 50-55HRC or higher, and there is no problem with the special requirement of 65HRC. He didn't know that the service life of hydraulic valve is our hard index.

3 months ago, Mike issued a test order for the hydraulic directional valve. Each different part of the hydraulic directional valve is marked with different hardness requirements. He also wants to know how AAK ensures the service life of the hydraulic directional valve.

To get a long service life of hydraulic directional valve, heat treatment is the first and most critical step. In order to do a good job in heat treatment, AAK has held a heat treatment factory for 10 years. The quenching and tempering heat treatment of hydraulic valve materials is sensitive to temperature. If the temperature is too low, hardness is not enough and easy to deform. On the contrary, it will lead to cracking. Only our proprietary heat treatment process can accurately grasp the appropriate temperature under the operation of a master with more than 6 years of experience. AAK can also select the corresponding heat treatment process and determine the temperature range according to the different working conditions of the hydraulic valve to ensure the service life of the hydraulic valve.

AAK hydraulic directional valve has a service life of more than 90% of its peers, you can also have a small try.

Nearly 90% of the hydraulic cartridge valve manufacturers in Ningbo can not achieve the filtration accuracy as high as 10 Microns. But AAK is 1 of the less than 10% hydraulic cartridge valve manufacturers with a filtering accuracy up to 10 Microns.

Dylan came to AAK HYDRAULIC VALVE with a very special two position two-way hydraulic cartridge valve. I knew he should have encountered a problem. For this special hydraulic cartridge valve, the filtration accuracy of 10 Microns was the minimum requirement. Dylan consulted the existing cooperated hydraulic cartridge valve manufacturers, but none of them could meet the requirement. Most hydraulic cartridge valve manufacturers said that the filtering accuracy of 25 Microns is 100% no problem. Only 1 hydraulic cartridge valve manufacturer gave feedback and was 70% sure that the filtering accuracy could reach 10 Microns.

Dylan directly asked me, is it really difficult for these hydraulic cartridge valve manufacturers in Ningbo to achieve the filtering accuracy of 10 microns? How can so many hydraulic cartridge valve manufacturers have said that they can only achieve the filtering accuracy of 25 Microns? I could understand his helplessness and confusion.

This is because that the conventional hydraulic cartridge valve manufacturers produce hydraulic valves according to domestic hydraulic standards in China. Not only 1 or 2, but nearly 90% of hydraulic cartridge valve manufacturers, can only able to get the filter element aperture reaches 25μm. We AAK HYDRAULIC VALVE also used conventional filters at the beginning, and the filtration accuracy was also based on domestic standards. 3 years ago, a German hydraulic valve customer requested the accuracy requirement of 10 Microns, which was not only a stimulus but also a challenge for us. After more than 2 months of adjusting, we improved the process on the small sample, and adjusted the equipment parameters until it was configured to a high-precision filter and cooperated with AAK special hydraulic oil, so that the filtration accuracy of particles in the hydraulic oil could be controlled to 10μm. 1 year later, some hydraulic cartridge valve manufacturers learned that AAK had upgraded with high-precision filters and followed suit. However, due to technical constraints, many hydraulic cartridge valve manufacturers still failed to meet the standard. Under the same working conditions, if the hydraulic cartridge valves from these hydraulic cartridge valve manufacturers have a service life of 2 years, the service life of AAK hydraulic cartridge valves can be extended to 3-4 years.

Dylan was surprised that we had mass produced hydraulic cartridge valves with filtration accuracy up to 10 Microns 3 years ago, but only 1 of his current hydraulic cartridge valve manufacturers could do it, and with only 70% sure. Dylan took out the drawings and asked us to send samples of this special hydraulic cartridge valve within 20 days.

AAK HYDRAULIC VALVE, always has high requirements on precision. If you need to find a high-precision hydraulic cartridge valve manufacturer, click AAK HYDRAULIC VALVE website:. AAK is your trusted hydraulic cartridge valve manufacturer. You can also try a small order.

Cliff is a purchaser of a hydraulic valve company in the United States. He began to contact the domestic hydraulic valve industry in China a few years ago and looked for new hydraulic valve suppliers everywhere. He didn't know much about the status of China domestic hydraulic valve industry and often ran up against a stone wall. A few months ago, he purchased a hydraulic diverter valve in Ningbo, the hometown of hydraulic valves. He encountered problems and could not guarantee the delivery date. It was a trial order of hydraulic diverter valve for their company's major customer. This customer is one of the world's top 500 enterprises. If the delivery date couldn’t be guaranteed, the boss must be mad.

After the communication between his boss and the customer, the customer required that the remaining 50% of the hydraulic diverter valves must be delivered within 40 days, otherwise, the order would be cancelled and all future hydraulic valve orders will not be placed neither. Cliff took this as a chance to prove himself. He spent a week constantly looking for new hydraulic diverter valve manufacturers, sending emails and making phone calls. With the situation of his last hydraulic valve manufacturer, he found that nearly most of the hydraulic valve manufacturers had low awareness of production efficiency. No matter whether the time given by the customer is enough for production or not, they just accepted the orders first. If the customer is urgent in need of goods, nearly 90% of the hydraulic valve manufacturers will choose outsourcing processing. The same batch of shipment will come from different hydraulic valve processing places, and the quality of the hydraulic valves is uneven.

Cliff's other hydraulic valve suppliers in Ningbo suggested him to see if AAK HYDRAULIC VALVE has time to catch up the delivery for these hydraulic diverter valves. After knowing about the situation, I suggested that he sent us 3 samples from the shipment of the hydraulic diverter valves, as well as the drawings, detailed information and process parameters etc, and then we can check if AAK can match the quality consistent and deliver the goods in time.

The AAK technical team had formed the production process and operation instructions for each process for this hydraulic diverter valve order to clean up the mess, to ensure that the production can be completed with the time frame given to Cliff. Cliff was glad that we AAK HYDRAULIC VALVE could solve this problem, and wanted to know more about how we guaranteed the delivery date.

I told him that there was an old Chinese saying that if you want a horse to run fast, you must let the horse eat well. Similarly, in the production of hydraulic valves, if you want to produce fast, you must not only have good equipment, but also special equipment. AAK HYDRAULIC VALVE has many high-precision imported CNC lathes and honing machines, as well as many small AAK designed fixtures and assembled special processing equipment. Each equipment has operation instructions. The production efficiency is 30% higher than that of its peers. Besides, AAK never cheat makes small tricks and has a correct production attitude. Our production line operates 24 hours, and the hydraulic valve technicians take two shifts off. Each process has strict operation standards, and the output of hydraulic diverter valve is 30% higher than that of its peers.

Because of the importance of the delivery date of this hydraulic diverter valve order, during the production process of the hydraulic diverter valve, Cliff asked us to report the production progress by video every day after work, for fear that we would delay the shipment like the last hydraulic valve manufacturer. After 25 days, the mass production of hydraulic diverter valve was completed 10 days in advance. Cliff was happy to report to his boss. The customer was also surprised to learn that the delivery was early. Cliff finally put down his heart that had been suppressed for more than 30 days.

AAK HYDRAULIC VALVE never makes small tricks, and the world's top 500 enterprises are also purchasing. Do you still have any concerns?

Recently, I received the second re-order of a hydraulic pressure reducing valve from French client Chinning. I still remember when I first met Chinning in 2020, Chinning purchased hydraulic pressure reducing valves in a hydraulic valve factory and encountered quality complaints from her customers. The hydraulic pressure reducing valve was deformed in less than 3 months, and some valve spools and valve sleeves were seriously worn. More and more customers began to return goods, and the old suppliers did not cooperate with her work. Chinning had a big headache at that time, and the boss kept putting pressure on her to find a hydraulic valve manufacturer with exquisite quality as soon as possible.

Chinning did not find a new hydraulic valve manufacturer very smoothly. Because her hydraulic pressure reducing valve had a special use scenario and required high hardness of materials, it was unbearable for ordinary factories. At the same time, under the environmental protection policy of 2019, many previous heat treatment and processing factories were shut down, so the supply supporting system was disrupted, and the heat treatment and processing of many hydraulic valve manufacturers could not keep up.

Chinning found us AAK HYDRAULIC VALVE on Google by chance. Chinning's first question message on our website was "how does AAK ensure the service life of hydraulic valve products"? We didn't answer directly, but asked her if the hydraulic valves you purchased had the problem of deformation and rapid wear. She also replied quite frankly that she should find a hydraulic valve manufacturer that paid attention to the service life of hydraulic valves in the fastest time.

I sent her several samples of hydraulic pressure reducing valve and told her that different parts of our hydraulic pressure reducing valve have different material hardness standards, and some could reach about 50-55HRC or higher. There is even no problem with 65HCR with special requirements. The service life of hydraulic pressure reducing valve is our hard index.

More than one week after we sent out the samples of hydraulic pressure reducing valve, we received Chinning's email, including the drawings of hydraulic pressure reducing valve and the hardness requirements for various components. She asked whether we could produce this hydraulic pressure reducing valve? I told her that his hydraulic pressure reducing valve is not difficult, but just the working scene is some special. As long as the heat treatment process is a little unique, it could 100% ensure her requirements. The long service life of hydraulic valve is the most critical.

AAK HYDRAULIC VALVE has controlled a heat treatment plant for 10 years in order to do a good job in heat treatment. The quenching and tempering heat treatment of this hydraulic pressure reducing valve material is sensitive to temperature. If the temperature is too low, the hardness is not enough, and it is easy to deform. On the contrary, it will lead to fracture. Only our proprietary heat treatment process can accurately grasp the appropriate temperature under the operation of experienced masters. AAK can also select the corresponding heat treatment process and determine the temperature range according to the different operating conditions of the hydraulic pressure reducing valve to ensure the service life of the hydraulic pressure reducing valve. Maybe there is no second hydraulic valve manufacturer with this ability in Ningbo, and the service life of AAK hydraulic pressure reducing valve exceeds 90% of its peers.

The service life of AAK hydraulic pressure reducing valve is exquisite. You can also try a small order.

It took 3 months and 6 proofing adjustments to match the sample quality of hydraulic pressure control valve made in Germany. Finally, AAK passed the parameter test of hydraulic pressure control valve, and our hydraulic pressure control valve was affirmed by Eaton’s company. We became Eaton’s first supplier for hydraulic pressure control valve in China.

In mid October last year, an agent of Eaton came to AAK HYDRAULIC VALVE and brought a sample of Eaton hydraulic pump with a purchase value of more than US$150,000.00, asking us to make a quotation. After we checked the product parameter requirements of the artwork, we declined the quotation because AAK is only good at hydraulic valve products. Compared with its domestic peers, most of the technologies of AAK HYDRAULIC VALVE were in TOP 1-6. We thought Eaton agent would not consider us again. However, after a month, he came again and brought a Vickers Series solenoid valve with a value of up to US$200,000.00. We directly said that we are not good at this kind of products and couldn't quote.

Eaton agent saw that we rejected the products that AAK is not good for 2 times, he felt that AAK is different from other hydraulic valve manufacturers, and recognized the professionalism of AAK HYDRAULIC VALVE. For the 3rd time, he brought a sample of pilot hydraulic pressure control valve with very high precision and wanted to test the parameters with our pressure test bench. I realized that Eaton agent actually wanted to test our pressure test bench with his samples. It was the first time for us to encounter such a situation, the purchaser did not test the quality of AAK hydraulic valve, but tested the equipment producing hydraulic valves first.

Being satisfied with our pressure test bench, he asked if we were interested in this pilot hydraulic pressure control valve, which was a hydraulic pressure control valve produced in Germany. After learning the parameters of the hydraulic pressure control valve in detail, AAK HYDRAULIC VALVE technical team discussed the artwork of the hydraulic pressure control valve. We were 90% sure to match the quality of this hydraulic pressure control valve produced in Germany.

More than 20 days later, we sent the first approval sample of the hydraulic pressure control valve. The sample comments was that there was still a 12% difference between the accuracy of AAK hydraulic pressure control valve and that of German hydraulic pressure control valve. We were required to send the revised sample again. The whole proofing and approving process have been bumpy, the parameters were continuously required to be improved. The samples have been adjusted for 6 times, finally, it met the quality of the German hydraulic pressure control valve after 3 months.

Since its establishment in 2006, AAK has always put technological innovation, high-quality raw materials and advanced equipment in the first place. AAK HYDRAULIC VALVE has many high-precision imported CNC lathes and honing machines, as well as many small AAK designed fixtures and assembled special processing equipment. Each equipment has operation instructions to eliminate human errors. At the same time, we have also undertaken many hydraulic valve orders from global TOP 500 enterprises such as HydraForce. In Ningbo, it is difficult to find the 2nd such hydraulic valve manufacturer.

AAK HYDRAULIC VALVE, focused on only one thing, is committed to the research and development of hydraulic valve and produce good quality hydraulic valve. You can also try a small order.

Just yesterday, I received a repeat order from Andy for a hydraulic flow control valve, which is just 3 months away from the delivery time of the last batch of hydraulic valves. The American customer Andy, started to communicate with us in 2019. Maybe it was just not the right time, we still didn't partner with each other till the beginning of this year. Because of encountering a Waterloo at the previous hydraulic valve manufacturer, he turned the tables at AAK and regained his confidence.

At the end of last year, Andy purchased a batch of hydraulic flow control valves from a hydraulic valve manufacturer. Because 20% of the shipments leaked, he encountered customer claims. The old hydraulic valve manufacturer was unwilling to bear the claim or re-produce. The customer kept pushing for replacement hurriedly. The boss asked him to find a high-quality hydraulic valve manufacturer to reproduce the goods for the customer.

Andy had a big headache at that time. The replacement quantity is not big, the hydraulic valve manufacturers with exquisite quality were unwilling to produce the small quantity for him. The hydraulic valve manufacturers who were willing to produce this quantity, were not able to meet the customer’s requirement about the roughness of hydraulic flow control valve. He ran into a wall everywhere, which made Andy haggard.

When Andy contacted with AAK HYDRAULIC VALVE, we are willing to cooperate with her to solve this difficult problem. We tested the leaked hydraulic flow control valve sample. The reason for the leakage is the roughness of the mounting surface of the hydraulic flow control valve. According to the customer's service conditions, this roughness must be controlled at 1.0 μ M or less. Andy is very confused why 80% of the installation surface roughness of hydraulic flow control valve is up to standard, while 20% is beyond this range. The root of this fluctuation is the master's operation method, resulting in human error. The surface roughness is the depth, density, texture of the traces left on the machined surface from the action between the tool and the part surface, which depends on the master's processing technique.

Andy is very clear that at present, most domestic hydraulic valve manufacturers generally control the roughness of the installation surface of hydraulic flow control valve at 0.8-1.0 μ m. The biggest problem is not stable enough. Andy also knows that only AAK controls the roughness value of hydraulic flow control valve within 0.8 μ M, which can completely avoid leakage outside the hydraulic flow control valve, because of rest assured, Andy decided to repeat the order with AAK HYDRAULIC VALVE.

AAK HYDRAULIC VALVE, first determines the material according to the roughness required by the customer, and then determine the cutting process of the material according to the characteristics of the material. The workshop produces it in strict accordance with the process sheet. Technically, we abandon the traditional grinding technology and use "turning instead of grinding". Equipped with high-precision CNC lathes, we refit elastic cutting tools by ourselves, and use automatic measuring instruments. The Ra value of hydraulic flow control valve is controlled in the computer at any time, which can eliminate man-made errors and prevent the fluctuation of Ra value of hydraulic flow control valve completely.

AAK hydraulic valves, produced with ingenuity, can be purchased with confidence. At the same time, the delivery date can be guaranteed. If you have any concerns about the hydraulic valve, you might come to have a look at our website

Gerrard, a Spanish hydraulic customer who just repeated the order at the end of May, repeated another order for hydraulic pressure valve again today, with total 3 orders for a hydraulic pressure valve a year. Since Gerrard chose AAK hydraulic valve, his customers are very satisfied with the accuracy and stability of AAK hydraulic valve. The market sales volume has increased by nearly 30% year-on-year. Now he has a higher and higher position in the company.

I still remember that Gerrard urgently needed to purchase a batch of hydraulic pressure valves for cranes. However, due to the high requirements for inner hole accuracy, he visited more than 10 hydraulic valve manufacturers, and none of them could reach around 1μm error requirement. Gerrard was very anxious. Fortunately, some peers brought Gerrard into contact with AAK. Finally, AAK helped to solve the problem of inner hole accuracy of hydraulic pressure valve smoothly.

3 months before Gerrard got into touch us, AAK HYDRAULIC VALVE purchased a honing machine imported from the United States to deal with the production of special orders. After repeated exploration for more than a month, modified the fixture of the equipment ourselves, we created the most consistent SOP to ensure the 1 μM accuracy error of the inner hole for the hydraulic pressure valve. At present, less than 5% of the domestic hydraulic valve manufacturers are equipped with this equipment. Among these 5% of hydraulic valve manufacturers, maybe only one manufacturer, we AAK HYDRAULIC VALVE, can modify the equipment on our own.

When AAK HYDRAULIC VALVE promised Gerrard that we have 90% of confidence to ensure that the inner hole accuracy of the hydraulic pressure valve can be controlled at 1 μ M, he was uneasy. After all, he visited more than 10 hydraulic valve manufacturers, and none of them successfully controlled the inner hole accuracy of the hydraulic pressure valve to 1 μm。Gerrard also was in doubt. We can understand him, because we haven't done the hydraulic pressure valve with inner hole accuracy error controlled at 1 μ M before.

After 15 days of sending the sample, Gerrard emailed us that the sample of AAK hydraulic pressure valve was approved at one time, and the surface finish of the hydraulic pressure valve was also praised by his clients. Subsequently, the first hydraulic pressure valve order from him was successfully completed.

AAK hydraulic pressure valve has two absolute advantages in controlling inner hole accuracy:

1. AAK HYDRAULIC VALVE has advanced equipment - honing machine, which is refitted by ourselves to ensure that the inner hole accuracy of the hydraulic pressure valve can be controlled at 1μm.

2. AAK HYDRAULIC VALVE has targeted operation process, can realize the personalized customization demand for the inner hole accuracy of hydraulic pressure valve, which can not be achieved by 95% of domestic hydraulic valve manufacturers.

Gerrard said that since the use of AAK hydraulic pressure valve, many end users have fallen in love with their hydraulic products, and there are more and more inquiries than in previous years. Presently, Gerrard orders hydraulic pressure valves from AAK 3 times a year. The customer praised him. The owner valued him. He worked harder and harder. Now his position in the company is getting higher and higher.

AAK HYDRAULIC VALVE guarantee 3 years of service life. With the high-precision AAK hydraulic valves, his order volume soared, you can also have a small try.

The valve spool hardness of AAK hydraulic flow valves reached 65HRC, the German customer Felix was impressed after receiving the first batch of shipments. Last week, he placed a reorder for 9,600 hydraulic flow valves, with a total value of more than 60,000 US dollars, and regarded AAK as his preferred supplier for hydraulic valve purchasing in China.

In the hydraulic valve industry, more and more hydraulic valve manufacturers focus on homogeneous hydraulic valves, resulting in a decline in the level of hydraulic valve material selection and material reprocessing technology. Many hydraulic valve manufacturers think that their valve spool hardness meets the standard, but problems come out when they make samples or run production. The reason why most of hydraulic valve manufacturers can not solve the hardness problem well, mainly is: 1) without professional and systematic material knowledge, don't know how to choose the most suitable alloy steel material. 2) In the heat treatment of materials, most of them are led by the processing plants, mainly because the heat treatment is outward processing, and 20% of the outward processing is to change a place with one shot, and the hardness can not be guaranteed at all.

Before the first cooperation with AAK, Felix consulted no less than 30 hydraulic valve manufacturers for the hydraulic flow valve with 65HRC valve spool hardness within 1 month. Only 2 said that 58HRC was the limit they can achieve. As for the other hydraulic valve manufacturers, no any feedback at all. Felix was extremely disappointed.

When browsing the B2B website, Felix accidentally encountered an article about AAK HYDRAULIC VALVE. The article mentioned that 30 factories could not make the valve spool with a hardness of 65HRC, but AAK HYDRAULIC VALVE had already achieved in mass production, which made him curious about how the AAK HYDRAULIC VALVE can be different. Felix learned that AAK has its own set of SOP for the selection of valve spool materials. Unlike the other hydraulic valve manufacturers, who use one material for nearly all hydraulic valves. AAK will select the most suitable steel according to the working scene of hydraulic valve, the medium used and the hydraulic parameters of customers, combined with the wear resistance, linear expansion coefficient and deformation of different steel, such as Cr12MoV, 12CrNi3A 18crniwa, GCr15 and other high-grade tool steels.

More importantly, AAK HYDRAULIC VALVE has its own heat treatment plant, which can adopt different heat treatment methods in quenching, carburizing and nitriding according to different contents of steel. For example, pretreatment, quenching, cold treatment, tempering, aging, fine processing and other secondary aging, the aging temperature and holding time of these processes are the key. AAK can achieve the aging temperature of 420 degrees, holding for more than 10h, and also obtain the hardness of 65HRC or above. It is difficult for other hydraulic valve manufacturers to have this process flow or operation technology.

Felix knows very well that if the valve spool wants to reach the hardness index of 65HRC, the hydraulic valve manufacturer must solve the above two key points at the same time, and AAK HYDRAULIC VALVE is what he thinks. Felix sent us the design drawings of hydraulic flow valves with a try attitude. During sampling period, he asked us to adjust the parameters and proofing twice. Finally, he only confirmed the small order of 200 hydraulic flow valves. One month after receiving the shipments, Felix emailed us that his customers were very satisfied with AAAK valve spools, and each valve spool was stable at the hardness index of 65HRC.

From the delivery of the first batch of hydraulic flow valves to now, it has been only more than 3 months. We did not expect that the quantity of the repeat order for the hydraulic flow valves has increased by 5 times, which is undoubtedly the best recognition of AAK hydraulic quality.

AAK hydraulic valve has advantages and promises. Also, AAK hydraulic valve has a service life longer than over 90% of its peers. If you need it, please give it a try.

Some time ago, Steven, from a Hydraulic Valve Company in UK, fell in a batch of hydraulic directional valves purchased in Ningbo. There had some email communication between AAK HYDRAULIC VALVE and Steven, but maybe the fate has not yet arrived, we did not cooperate until last month this year. Steven regained his confidence because he had suffered a waterloo and got back a key game here in AAK.

At the beginning of this year, a batch of hydraulic directional valves purchased by Steven in Ningbo were stuck and failed during the test run, resulting in the failure of the whole batch of equipment to start up and run. His customer asked UK company to solve it within 30 days, otherwise there will be a big claim. Steven informed the original hydraulic valve manufacturer of these conditions, but the manufacturer prevaricated that it was a problem caused during the assembly process and had no direct relationship with them. Steven also consulted other hydraulic valve manufacturers. They either replied that the hydraulic valve was not produced by them and could not give the corresponding strategy, or there was no reply. Steven received serious rebuff here and there, and feel stressed.

When Steven contacted AAK HYDRAULIC VALVE, we were willing to cooperate with him to solve this problem because we felt his trust in AAK HYDRAULIC VALVE. Through his email description, we were still not sure what the problem is, and asked him to send us samples.

After AAK HYDRAULIC VALVE received the hydraulic directional valve samples from Steven, we felt that the relative sliding between the middle valve column and the valve body was not smooth. When the whole hydraulic directional valve is disassembled, there are slight scratches on the column surface, the valve body hole has a negative tolerance, and the valve body column hole has plastic distortion. Further microscopic examination showed that the surface of the material was etched badly. It is certain that the original hydraulic valve manufacturer has problems in material selection and heat treatment of alloy steel. Then we informed Steven of the result in a report and attached our suggestions for this style of hydraulic directional valve.

After receiving the report, Steven seemed to see hope and asked us to make 5 hydraulic directional valve samples for his customer to run successfully first. After knowing the working conditions of this hydraulic directional valve, we adjusted the material selection of alloy steel, and increased the overall hardness of the hydraulic directional valve by 30% on the original basis.

1 week after Steven received the samples, he informed AAK HYDRAULIC VALVE by e-mail that the hydraulic directional valve samples made by AAK were started up smoothly as soon as they were tested on the machine. When the new delivery date and order quantity were confirmed by his customers, he was finally relieved. At the same time, he wanted to know how AAK would produce each hydraulic directional valve of the same quality as these samples in mass production.

In terms of material selection, according to the working conditions of hydraulic valve, AAK HYDRAULIC VALVE set the material composition requirements with computer program, and then use metallographic sample for comparative analysis to detect the selected alloy steel. For the heat treatment of alloy steel, the same batch of steel shall be heat treated at the same time, without splitting batch or section. In terms of quenching and carburizing, the carburizing gas composition of alloy steel is changed according to the aging temperature and holding time of the process, and the carburized alloy steel is controlled not to retain excessive austenite during heat treatment, so as to ensure the stability of the whole alloy steel. AAK can achieve the aging temperature of 420 ℃ and thermal insulation of more than 10h. Basically, more than 95% of the hydraulic valve manufacturers can not meet this process index.

After Steven got AAK's reply, he finally put down the heart that was uneasy for more than 20 days. The owner appreciated that he solved the difficulty on the hydraulic directional valve order within the time specified by the customer, and gave him a week's holiday to relax.

AAK HYDRAULIC VALVE factory is the first choice for hydraulic directional valve. Actually, its quality has been recognized by Hydra Force, it is reassuring to use it. You can also have a small try.

AAK uses Rockwell hardness tester to check the hardness of each part of the hydraulic valve, so that the hardness of each heat-treated alloy steel is "exposed". Nearly 90% of domestic hydraulic valve manufacturers are not equipped with this Rockwell hardness tester with the highest accuracy. An Italian hydraulic valve customer, who disliked the expensive price of AAK, purchased the high hardness hydraulic directional valves from another hydraulic valve manufacturer but suffered loss from poor quality, he finally returned to AAK to place an order.

Because of the common problem of unstable heat treatment in the industry, the hardness test of hydraulic valves with high requirements for stability is very important. Most hydraulic valve manufacturers can't grasp the details of hardness testing. They don't have high-precision hardness testing instruments, just checking the hardness by experience. They often put on-line production without knowing the hardness of materials is not up to standard due to human errors.

Harvey is a hydraulic valve purchaser from Italy. In particular, there are many inquiries for hydraulic directional valves, and the hardness requirements for hydraulic directional valves are particularly high, with few requirements below 65HRC. Since last year, he has sent AAK inquiries for hydraulic directional valves every 2 weeks, all of which are 65-68HRC hardness indicators. Strangely, there were 10 inquiries for hydraulic directional valve, but no order was placed with AAK. Every time we followed, the reply we almost received was "the price is too high and will not be considered for the time being". We realized that this is not our customer.

In June this year, Harvey sent an inquiry for the hydraulic directional valve with 68HRC hardness index, which is very similar to the 68HRC hydraulic directional valve inquired last year. We didn't quote the same day and intended to give up. The next day, he emailed again to ask whether his inquiry had been received. We replied that the AAK price doesn't meet your goal. We won't make an offer for the time being. Let's make friends. Harvey probably realized that AAK didn't want to waste time, he told us the truth frankly. There was a problem with the 68HRC hardness hydraulic directional valve he purchased from another hydraulic valve manufacturer. Strangely, the thickness measured in the shipping inspection link was up to standard. After the customer received the shipments of hydraulic directional valve, there were continuous complaints, all of which were due to the instability of the hydraulic system caused by unqualified hardness.

From his description, I felt that there was something wrong with the testing instrument and asked him to send samples to us for testing. He was surprised when he learned from the other hydraulic valve manufacturer that there was no test report for 68HRC hardness. Before placing the order, Harvey's colleague visited the hydraulic valve manufacturer, who has its own heat treatment processing plant, and the heat treatment testing link is also equipped with a Leeb hardness tester to check the hardness. The price of their hydraulic directional valve was 6% cheaper than AAK HYDRAULIC VALVE, so order was placed with this hydraulic valve manufacturer.

Harvey was curious about how we detected that these hydraulic directional valves did not have a hardness of 68HRC. AAK has been engaged in the hydraulic valve industry for so many years, wholeheartedly pursuing product quality and checking step by step from material selection. In terms of hardness index, it not only has its own exclusive heat treatment plant, but also has its own exclusive quenching and tempering heat treatment process. Through the combination of quenching and tempering at different temperatures, the hardness of materials can be greatly improved. At the same time, the testing equipment is equipped with Rockwell hardness tester with the highest accuracy in China. The hardness testing range is HRC 20 ~ 70. As long as the hardness requirement is within this range, the test error will not exceed +/- 0.1HRC, while the detection range of Leeb hardness tester used by most hydraulic valve manufacturers is HRC 20.4-67.1. If the hardness exceeds this range, the test data is distorted. In high precision, we benchmarked Eaton Vickers directional hydraulic valve.

Harvey suddenly understood and hoped that we could maintain the original quotation for this inquiry for the hydraulic directional valve, and asked us to arrange samples of the hydraulic directional valve within 10 days and send them to his customers for testing. 3 days later, Harvey sent the order for the hydraulic directional valve. He said that he recognized the product hardness of AAK hydraulic valve very much, and would send the inquiry of 68HRC hydraulic directional valve to AAK only in the future.

AAK HYDRAULIC VALVE has a rigid heart never compromising on quality and high-precision equipment. You can buy at ease, use at ease, worthy of a try.

James is the purchasing director of one of our American Hydraulic customers. They are the top 3 in the construction machinery industry in the United States, and their market share is increasing year by year. James is also doing well. In May last year, the MP550-HDD-18 cement delivery pump supplied by their company to a local construction company often failed to reach the rated value for the system pressure during use, and the oil pressure of the hydraulic system can only reach 12MPa. After disassembling the hydraulic system, the engineer found that the joint surface between the conical pilot valve body and the valve seat of the hydraulic relief valve was grinded out with a circle of uneven groove line with a depth of about 1mm for unknown reason. The hydraulic oil flowed back to the oil tank from this groove, and the hydraulic relief valve had no sealing function.

The customer wanted James’s company to replace the hydraulic relief valve of the same model within 2-3 weeks. If they miss the time, the project progress will be affected. When James purchased this hydraulic relief valve from the original German hydraulic valve supplier again, he was told that they produce this hydraulic relief valve no longer. If he wanted to re-produce it, it would take 35 days and modify the production process and auxiliary equipment, which would require an additional cost of more than 30,000 US dollars. This style of hydraulic relief valve was just purchased by James 2 years ago. When he reported this situation to the president, the president didn't understand why he didn't have an alternative hydraulic valve manufacturer. James realized that the president was unhappy. When he sent the anatomical drawing of this hydraulic relief valve to more than 20 hydraulic valve manufacturers, almost all said that they have no hydraulic relief valve with such structure, James was a little flustered.

In March this year, James just purchased a batch of high-precision hydraulic relief valves from AAK. He wanted to see if AAK had a way to solve this thorny problem. When he sent us the pictures of this hydraulic relief valve made in Germany, we asked him to send us the whole complete technical drawings, as well as the use environment and working conditions. The pressure of this hydraulic relief valve is 31.5Mpa and the flow is 200L / min, which is basically consistent with the parameters of the hydraulic relief valve we supplied to them before. However, there is a fatal problem that the internal structure, appearance, shape and size are inconsistent with those of the hydraulic relief valve they purchased in Germany, so it is difficult to install on the transmission line.

After learning that the only way is to meet the requirements of the transmission line at the construction site in the United States, AAK engineers designed a new hydraulic system with two pipe joints and an oil plug according to the diameter and outlet size of the overflow valve of the cement pump and the working pressure, and sent the design of the new hydraulic relief valve to James at the first time. Their engineers were surprised by this idea, and asked us to make a sample quickly. We produced 2 samples of the new hydraulic relief valves in 10 days. After they received the samples, the hydraulic relief valve was installed on the cement pump. After the startup test, the whole conveying system can be used normally.

Their customers were very satisfied with the speed of problem solving from James' company this time, and promised that James’s company would be the first choice for the purchase of all hydraulic system equipment, which made his president very happy. After this waving, James said that the president valued him more and more.

AAK hydraulic valve has high precision and creativity beyond peers. We guarantee the quality for 3 years of service life. If you have any problems with hydraulic valve, please contact us for a small try.

AAK hydraulic check valve replaces HAWE hydraulic valve in the United States and become designated supplier for Denison hydraulic pump components

When I got up to go to the bathroom at 1 a.m. last Monday, my wechat phone rang. It was from Carl, the purchasing manager of Denison hydraulic pump company in the United States. I was very surprised by this phone call. Generally, we communicate with Carl in the form of e-mail and have never used wechat phone. Carl firstly said sorry to disturb my rest, and asked if I could arrange a video conference at 8:00 tomorrow morning. He needs to discuss a troublesome problem with our technical team.

I'm concerned that the communication on the phone will not be clear, and asked him to send me a written email first, and then I'll reply to him. Half an hour later, a detailed email with a schematic diagram of the hydraulic system came in. Last week, the hydraulic pump supplied by them encountered problems with his customer. The customer's hydraulic system has been shelved for half a year, and now it needs to be driven. After the operator starts the hydraulic pump, there is no pressure in the hydraulic system. The field engineer judged that there was no flow output of the hydraulic pump, but after inspection, it was found that the rotation direction of the motor was consistent with that of the hydraulic pump, and the oil level, oil temperature and viscosity of the hydraulic pump met the working conditions. The suction system of the hydraulic pump was replaced, including the oil suction pipe and filter. After startup, there was still no flow output. The transmission parts inside the hydraulic pump are intact without falling off, fracture and blade jamming. A week has passed and no reason has been found. Because the hydraulic pump is still in the warranty period, if it cannot be solved in another week, it can only be returned for claim. Carl asked the original supplier of each part for the hydraulic pump and got nothing.

After reading the email, I asked him if the hydraulic pump used a hydraulic check valve? Carl said that the hydraulic check valve was provided by HAWE company in the United States, but the after-sales period of the hydraulic check valve has expired. Because AAK supplied hydraulic check valves to their company last year, and the quality was very satisfying, although the hydraulic check valve in this hydraulic pump is not from AAK, he wants to see if AAK technical team can find out the reason. I said there was no problem with the 8:00 video conference tomorrow, because the chief engineer of AAK didn't travel, but I'm not sure if we can help.

The next day in the video conference, their engineers showed the whole system. Our chief engineer found that the displacement of the hydraulic pump was 8ml / R, so he asked them to fill the hydraulic pump directly in the oil outlet pipeline, and then start it up. The hydraulic pump still had no flow. Then asked them to disassemble the liquid pump to see the oil stains in the inner cavity of the oil suction pipe in the pump. As a result, there is no oil stain in the upper half of the suction pipe in the pump and the vertical section, while there is oil stain in the lower half. The problem should be here. The lack of flow output of the hydraulic pump is caused by the pump's failure to suck oil or empty. The problem lies in the hydraulic check valve at the pipe joint at the oil outlet. It should be that the valve spool of the hydraulic check valve is stuck. They removed the current hydraulic check valve, and replaced it with a new hydraulic check valve, and restarted. The hydraulic pump outputs the flow normally, but it stops working after 5 minutes. Our chief engineer said calmly that the problem must be here. The reason for the shutdown is that the new hydraulic check valve does not meet the current working condition. The new hydraulic check valve must be purchased per this working condition or re-purchase the previous hydraulic check valve.

Carl asked us to sample 2 hydraulic check valves according to their working conditions. If they match, this hydraulic check valve will be purchased from AAK in the future. At the same time, Carl proposed to Denison's senior management that AAK can be the designated supplier of Denison in the hydraulic check valve, because they admire AAK's professional ability and strong technical R & D team. The top management is happy to accept Carl's suggestions and appreciates Carl's way of solving the problem this time. Carl hopes that AAK and Denison will become strategic partners and jointly build the world's strongest manufacturer of hydraulic equipment. We are ready.

AAK hydraulic check valve can replace the local hydraulic valve supplier of American customer. Its quality is comparable with the international first-line hydraulic valve brands.You can also have a small try.

Tony is a purchasing manager of Italian Casappa company, mainly responsible for the purchasing of hydraulic pump components. Last October, Casappa developed a new hydraulic pump and planned to promote this new product at this year's exhibition. During the debugging, the output pressure of the hydraulic pump can not be established several times, which is a little troublesome, because the owner has sent all the invitations to the exhibition to the customers and grandly introduced the functions of this hydraulic pump. The R & D personnel checked and tested each component one by one. It is basically certain that it is caused by the instability of the pilot operated pressure control valve.

The technical team dissected the pilot pressure control valve and found local friction marks on one side of the hole wall of the valve body. The diagnosis conclusion is that the main valve spool is stuck, which should be caused by the concentricity difference between the hole of the main valve body and the hole of the pilot pressure control valve body. The owner asked Tony to re purchase the pilot pressure control valve that meets the technical requirements, which must be solved within 25 days, otherwise he will leave because the exhibition is too important. Tony contacted the original hydraulic valve manufacturer and got a reply that due to equipment, he could not produce high-precision pilot pressure control valves with the exactly same concentricity. At the same time, he contacted a number of hydraulic valve suppliers and they basically replied that they could not do such a high precision pilot operated pressure control valve, which made Tony almost collapse.

When Tony searched the hydraulic valve suppliers in Google, he found AAK HYDRAULIC VALVE. The details page of the hydraulic valve on AAK website made Tony feel that maybe AAK could have a try. He emailed us firstly to ask whether the concentricity of the pilot operated pressure control valve could be consistent. We need the detailed drawings, working conditions and parameters of his whole hydraulic pump to judge. After receiving all information from him, AAK technical team pondered the whole afternoon, with more than 95% confidence, and it would take 15-20 days to complete it.

Tony said he was happy and uneasy. He was happy that some hydraulic valve manufacturer could try this high-precision pilot operated pressure control valve and has a high probability of success. He was uneasy that if AAK HYDRAULIC VALVE did not succeed in proofing, the time would be wasted. We understand his concern. We told him that the reason why we are not sure for 100% is that there is a data that can't be determined. If AAK HYDRAULIC VALVE failed in sampling, then he should not waste time in Ningbo area. We suggest that he also find a hydraulic valve supplier in Europe, so as to sample with AAK at the same time.

2 weeks later, we sent a sample of the pilot operated pressure control valve. 4 days later, Tony sent an email excitedly informing us that the pressure of the hydraulic pump was completely normal after using the pilot operated pressure control valve with the same concentricity from AAK. The owner was very happy that the exhibition would not be affected. 5 days later, Tony sent another email to inform us that the pilot operated pressure control valve provided by a well-known hydraulic valve company in Germany had also been successfully tested. AAK took 15 days to proofing, and the German hydraulic valve manufacturer took 25 days. At the same time, the price of AAK hydraulic valve is 10-15% cheaper than that of German hydraulic valve. He was surprised why AAK took less time to proofing and the price was cheap, but the quality of the hydraulic valve was benchmarked with the well-known brand in Germany.

AAK has made the most typical improvement on the equipment. On the high-precision machine tool imported from Switzerland, it adopts high-speed interpolation technology to realize continuous feeding with small program segments, so as to make the control unit of the machine tool more refined. At the same time, the high-resolution position detection device is used to improve the position detection accuracy, and the position servo system adopts feedforward control and nonlinear control methods, plus with the most experienced engineers to test the accuracy of each process, so as to ensure the consistency of the concentricity of the pilot operated pressure control valve. Tony admires our innovation in equipment, especially our quality benchmarking the German brand. After some time, he privately informed me that the exhibition was a great success, and the owner was in a great mood. Tony was not only praised by the owner, but also upgraded to the general manager of purchasing dept. AAK pilot operated pressure control valve has become the best choice for Casappa.

The customer purchased from AAK said that AAK pilot operated pressure control valve is benchmarked with the German brand. AAK valve has no leakage, 3 of 500 Global Top Enterprises in Use. You can also have a small try.

Recently, when chatting with several brother customers Felix and Carson, they asked me why the same model of hydraulic valve spool, AAK has higher precision and stronger sensitivity than its peers.

This is a good question. I smiled and said: you may not have a comprehensive understanding of AAK hydraulic valve. For all types of hydraulic valve spools, AAK is subject to strict quality control. Under the condition of ensuring that the spool is suitable for the service conditions, we will select the most appropriate tool steel (40Cr, Cr12MoV, 12CrNi3A, 18crniwa and GCr15, etc.) according to the customer's parameter requirements and service scenarios. 6 major processing processes and 6 major parameters are used. This technology has led the industry, we are not satisfied with these static data, but also need dynamic spool.

Since the valve spool needs to move in the valve body, the clearance between the valve spool and the valve body should not only ensure good sealing, but also ensure small movement resistance. Therefore, the matching clearance between the valve spool and the valve body is the top priority affecting the use of the valve spool. The following are the tolerances and matching clearance dimensions of the valve spool and the valve body produced in large quantities by AAK in the actual production process:

Diameter	Valve body tolerance	Spool tolerance	Minimum clearance	Maximum clearance
6mm	±0.006mm	±0.004mm	0.0025mm	0.0125mm
>6-12mm	±0.0075mm	±0.005mm	0.0050mm	0.0175mm
>12-20mm	±0.01mm	±0.006mm	0.0050mm	0.0233mm
>20-25mm	±0.0125mm	±0.0075mm	0.0125mm	0.0325mm

When the reciprocating or rotary valve body is matched with the valve spool, we AAK generally use the minimum clearance, but the specific processing parameters should also be determined according to the customer's parameter requirements and use scenarios, so as to ensure that the hydraulic valve does not have any leakage, valve stuck and other unexpected working conditions.

During the processing and manufacturing of valve spool, AAK also strictly considers the following aspects, and will check and test each valve spool when necessary, so as to ensure the high quality and reliability of valve spool.

1. Hydraulic power on hydraulic spool

2. Pressure and flow characteristics of hydraulic valve spool

3. Flow coefficient of hydraulic valve spool

4. Leakage of hydraulic valve spool

5. Stability of hydraulic valve spool

6. Vibration of hydraulic valve spool

7. Cavitation of hydraulic valve spool

After listening, they admired AAK's rigid attitude and trusted the quality of AAK hydraulic valve more. Using AAK hydraulic valve is reassuring, so AAK has always been their preferred hydraulic valve supplier in China.

AAK hydraulic valve sticks to itself and high quality control. You can also have a small try.

In March this year, the sales manager of Caterpillar received a phone call from a Spanish customer complaining that several excavators produced by their company had small start-up faults. The repairman judged that the hydraulic system leaked oil, which should be caused by the leakage of the hydraulic check valve. The customer asked them to replace the hydraulic check valve as soon as possible. This customer accounts for 40% of Caterpillar's sales. Although it has passed the maintenance period, they must help the customer solve the problem.

The original hydraulic valve supplier said that for the hydraulic check valve under this working condition, there can only be no leakage for 2-12 months. In extreme cases, it may be less than 2 months. The customer was disappointed with such a maintenance plan. The boss asked Mark, the purchasing manager, to find a solution satisfying the customer. Mark contacted more than 10 hydraulic valve manufacturers, but did not get a satisfactory reply. He boss urged him to make a new plan twice a day.

Mark thought of AAK HYDRAULIC VALVE he had contacted before. Maybe AAK can do some help. He firstly asked us why so many hydraulic valve manufacturers can't achieve 0 leakage for more than 12 months for this style of hydraulic check valve? The hydraulic check valves often use steel ball or metal cone slide valve to contact and compress with the orifice of metal valve seat under the action of spring and fluid pressure to prevent the reverse flow of liquid, but it is difficult to achieve absolute seamless butt joint in the cutting of metal contact surface. Especially under the special working condition of this customer, it is more difficult to avoid leakage. This hydraulic valve manufacturer who has insured for 2 months is already great.

Mark thought that AAK HYDRAULIC VALVE could not produce a hydraulic check valve with 0 leakage for more than 1 year, and asked how long we could insure at most. AAK can produce hydraulic check valve with 0 leakage for more than 12 months. If there is no leakage within 1 month, and if subsequent maintenance is in place, the hydraulic check valve can be 0 leakage for 24 months.

Mark was surprised at our reply and thought we were joking. Let's talk about it with facts: AAK will send the hydraulic check valve samples within 20 days, you test the hydraulic check valve first, and we will then discuss it after the test.

After 15 days, AAK sent the hydraulic check valve samples to Caterpillar. Their engineers conducted internal test first, and there were no abnormalities in many tests. Their after-sales personnel took the samples directly to the customer's construction site for on-site installation and commissioning. It worked continuously for 12 hours, and everything was still normal. The customer was very satisfied with Caterpillar's after-sales service. The boss was also very happy and asked Mark to hurry up to purchase. ark was curious how AAK achieved the hydraulic check valve with 0 leakage for more than 12 months?

After receiving the drawings, AAK fine tuned the structure of the hydraulic check valve in the original design without adopting the traditional sealing design. A special soft sealing ring is installed between the outside of the boss of the valve seat and the end face of the valve spool. At the same time, the inner diameter of the soft seal ring is less than the diameter of the boss, rather than the traditional diameter more than that of the boss. When the hydraulic check valve is closed, the soft sealing ring will deform under the action of hydraulic pressure and compress the contact sealing surface between the metal valve spool and the metal valve seat to achieve 100% sealing and ensure 0 leakage.

Last week, Mark sent us an inquiry for a new hydraulic valve. Incidentally, he said that since the Spanish customer installed their excavator with AAK hydraulic check valve, everything is normal. The customer has been purchasing other styles of excavators from his company. The boss is more and more appreciative of him now, and assigned all important purchases to him.

AAK hydraulic check valve, zero leakage, pay attention to, welcome to have a small try if you need a new and top hydraulic valve manufacturer in Ningbo.

In July this year, Bowen, an Australian customer, visited 5 hydraulic valve factories before and after, and made samples of hydraulic relief valve with ±1μm inner hole for 3 times, but none of them reached the accuracy requirements. AAK sent samples and met the standard for the 1^st time, Bowen finally chose to cooperate with AAK.

The inner hole accuracy is not enough, which is mainly caused by the different built-in equipment of honing machines equipped by many hydraulic valve manufacturers. Conventional honing machines use diamond reamers., Because the main cutting part of the diamond reamer is at the tool head, the tool head wears quickly. After the head is worn, it is very easy to cause the size of the hole bottom to be small, resulting in the poor cylindricity of the whole hole and affecting the accuracy. This is the key to the 5% accuracy error. Many hydraulic valve manufacturers are not aware of this key point.

Bowen, a purchaser from a hydraulic valve company in Australia, has an inquiry for a special hydraulic relief valve, and the inner hole accuracy must be controlled within 1μm. Bowen checked with the original hydraulic valve supplier, and got reply that only the hydraulic valve manufacturer equipped with high-precision honing machine is able to make the hydraulic relief valve with 1μm inner hole accuracy. According to the equipment configuration, Bowen has contacted with more than 10 hydraulic valve manufacturers, determined to visit 5 hydraulic valve manufacturers, and asked 3 powerful factories to sample the hydraulic relief valve. After testing and comparing the samples received from these 3 hydraulic valve factories, all failed to meet the standard. Bowen asked the manufacturer with the highest accuracy to continue to improve the proofing, and there is still ±0.1μm gap. The factory gave up and introduced AAK HYDRAULIC VALVE to him, maybe AAK can do the hydraulic relief valve with ±0.1μm inner hole accuracy.

According to his hydraulic relief valve drawing, we advised that we can send 1pc hydraulic relief valve quality sample after 10 days. 5 days after AAK successfully sent the hydraulic relief valve sample, Bowen informed that the accuracy met the standard. He wanted to know why so many hydraulic valve manufacturers could not achieve ±1μm inner hole hydraulic relief valve, even if the hydraulic valve manufacturers promised to do so and they also have high precision honing machines, but several proofing did not meet the standard. How did AAK hydraulic valve achieve it?

Honing machine is really helpful for the machining of high precision inner hole. Due to different equipment configuration, not every hydraulic valve manufacturer can produce the hydraulic relief valve with ±1μm inner hole accuracy. Different from conventional hydraulic valve manufacturers, AAK adopts sintered diamond tools, equipped with 15 tool position tool magazine and automatic tool change mechanism, which can automatically change tools and add deburring tools. At the same time, it has XY axis worktable, which can automatically change the hole for porous work pieces. At the same time, we have installed an online measurement system in the machine tool to automatically detect the initial diameter of the hole. The system also detects the hole distance, which can automatically alarm abnormalities and 100% eliminate human errors. Bowen's doubts are completely eliminated and asked us to do preparation for material. After he confirms the order with the customer, he will start placing order for this hydraulic overflow valve.

The peers can not guarantee high precision even with the same equipment, but AAK hydraulic valve has always been the leader in precision. You can also have a small try.

Daniel is a purchaser of Liebherr branch in Germany. He is responsible for the procurement of hydraulic components. He has done an excellent job some time ago and has been praised by his supervisor for many times. Before the shopping season, he wanted to relax and planned to go on vacation with his family next week. A phone call from the boss disrupted all his plans. A major dealer in Sweden asked for help for a excavator produced by their company within 1 week . His engineer came to the user for routine maintenance and found that there was oil leakage in the hydraulic system. After pressure test, it was found that there was oil leakage in the hydraulic check valve, and 12 excavators had such faults.

Daniel hurriedly contacted the American supplier for this hydraulic check valve, and got the reply that it was too cold in Sweden at this time. For such high-frequency operation, even if the hydraulic check valve was replaced, it was estimated that the hydraulic check valve would still leak oil 1 week later. Unless more low temperature resistant sealing rings are used, this will take time to test, but the finishing time is to be determined. Daniel was so helpless, he had to find a new hydraulic valve supplier. Daniel asked several local hydraulic valve manufacturers. They either didn't have time to produce or require over 50pcs MOQ. After knowing these situations, the supervisor asked Daniel to give the dealer a plan that can be implemented within 10 days. Daniel had to cancel the vacation.

Daniel thought of AAK HYDRUALIC VALVE who he had contacted for inquiry before. He emailed us to ask whether we can produce the hydraulic check valve for the excavator, which needs to be resistant to low temperature. According to the drawings and working conditions provided by him, we advised that it takes 20 days to customize. All our existing hydraulic check valves are not close to this size. Daniel reiterated the hydraulic check valve needs to be low temperature resistant, and frankly told us what they are currently experiencing. I answered directly that the core lies in the low temperature resistant sealing ring. Daniel felt that maybe AAK could solve this problem.

After 18 days, we sent a sample of hydraulic check valve. The test results proved Daniel's feeling. The parameters passed the test and there was no oil leakage at low temperature. The order for 12 hydraulic check valves was also easily confirmed. Daniel's hanging heart can finally be put down.

Daniel asked why American hydraulic valve manufacturer needs time "to be determined" to test, and we solved it in 18 days. Why German hydraulic valve manufacturer is unwilling to do this small quantities, but it is OK for AAK hydraulic valve. At the same time, the price of AAK hydraulic valve is cheaper than that made in Germany and that made in the United States.

The zero leakage hydraulic valve not only has strict requirements on accuracy, but also strict requirements for the sealing ring due to different media or different scenarios. The sealing ring not only needs to be sealed, but also needs to automatically improve its sealing effect with the increase of the pressure of the hydraulic oil. It also needs not to leak under the harsh working environment such as low temperature or high temperature. 1 year ago, a Russian customer of AAK hydraulic valve put forward the requirement of low temperature resistance. We spent 6 months, experienced 3 failures and 6 seal ring material tests, and innovated a seal ring polymerized with polyurethane elastomer and special rubber from the perspective of friction coefficient. Its low temperature critical point is - 45℃, and its wear resistance, oil resistance, fatigue resistance and vibration resistance can meet high-frequency operation. It was mass produced 1 year ago.

AAK delivered 12 hydraulic check valves to his dealer. After all installation and commissioning, they worked continuously for 2 weeks without abnormalities. The Swedish dealer was very satisfied with the high standard after-sales service provided by Liebherr branch. Daniel was very happy. His supervisor gave him special permission to spend more days with his family.

AAK zero leakage hydraulic check valve was delivered to Liebherr. You can feel at ease to have a small try.

Yesterday, I received a repeat order for a hydraulic sequence valve from Gary. The first order of this hydraulic sequence valve was placed 3 years ago. Before, I wondered why this hydraulic sequence valve had not been repurchased, thinking that it had been switched back to the United States for production. I really didn't expect to receive the repeat order after 3 years, and the quantity was more than 3 times that before.

3 years ago, Gary’s company had a newly designed hydraulic pump to be produced in Vietnam branch, and the pump needed hydraulic sequence valve. If purchasing the hydraulic sequence valve in the United States and delivering it to Vietnam, it was expected to take 3 months or more. His boss wanted to try purchasing in China, hoping to save half the time. According to the boss's instructions, Gary spent 3 days looking for hydraulic valve factories, selected 5 hydraulic valve manufacturers from more than 10 as their hydraulic sequence valve suppliers, and asked them to send reference samples of hydraulic sequence valves to Vietnam for testing. Gary happily reported the purchasing status to his boss, who was satisfied.

After Gary received these hydraulic sequence valve samples, he arranged the technical department to match the working conditions for testing, but the results were poor. The matching clearance between the valve body and the valve spool of some hydraulic sequence valves was small. After an additional 20% pressurization, the valve hole was deformed and the valve spool would be stuck. All 5 hydraulic valve manufacturers said that after additional pressurization, they were not able to ensure the quality of hydraulic sequence valve. Time has been wasted for more than 2 weeks. At this time, if returning back to the United States to purchase hydraulic sequence valves, he would be scolded by his boss. Gary began to worry.

When Gary browsed AAK website (www.aakindustry. com), he felt that AAK hydraulic valve was some different from the other hydraulic valve manufacturers. He emailed to inquire about the hydraulic sequence valve and frankly told us the problems he had encountered with Chinese hydraulic valve manufacturers. After several rounds of e-mail communication and AAK technical team's analysis of his drawings, we truthfully told him that AAK's existing hydraulic sequence valve samples could not meet his pressurization test. It takes 2 weeks to proofing according to the drawing. If the sample of the hydraulic sequence valve is approved and it takes 25-30 days to produce his order for the hydraulic sequence valve, Gary calculates the time. If the sample of AAK's hydraulic sequence valve is successful, the time saving meets the requirements of the boss. If it is not successful, it will waste another 2 weeks. It seems that he has no choice. Somehow, Gary feels that AAK can give him hope and hopes that we can send samples as soon as possible.

4 days after the samples of the hydraulic sequence valve were sent, Gary e-mailed to us that the pressurization test passed. The problems happened on the samples of the previous 5 hydraulic valve manufacturers are now gone. At the same time, all the parameters of AAK hydraulic sequence valve can be compared with those produced in the United States. Gary asked us to hurry up to prepare for production and deliver on schedule.

In order to avoid pressure deformation, AAK adjusted the production process of the valve hole and applied the technical method of "avoiding deformation" to the production process of the valve hole. An experienced AAK technician who had operated for 7 years failed for 3 times before mastering this operation key point. After Gary knew this, he said it slowly that only at this time, he really knew the difference of AAK hydraulic valve and didn't want to waste time looking for homogeneous hydraulic valve manufacturers.

AAK hydraulic sequence valve is benchmarked with the original American hydraulic valve supplier, and has become the only hydraulic valve supplier of a Russian customer. You may not be able to find a second one like AAK in Ningbo. You can also have a small try.

At the beginning of last month, Berton sent an email to us, with the theme of "damn hydraulic valve block", which surprised me. I thought there was something wrong with the hydraulic valve block purchased by Berton from AAK. After reading the email, I learned that he purchased the hydraulic valve block from a German company. There was a leakage problem in the two proofing, and each time the sampling modifying process was very slow, which affected the commissioning of the whole equipment. The technical team had complained to the boss, who was a little annoyed and asked him to get the modified sample of the hydraulic valve block approved for the third time within 1 month. The German factory advised that the third hydraulic valve block sample could be solved at one time, but 1 month was not enough, which made Berton very helpless.

Because this series of hydraulic valve blocks has been purchased in Germany before, Berton has to wait for the revised sample from the German factory, and find a new hydraulic valve block supplier at the same time. He wanted to check if AAK has any good suggestions. I asked him to send the hydraulic valve block design drawings to us, note the working conditions, and also send the second unconfirmed hydraulic valve block samples to AAK for comparison.

According to Berton's drawings and the samples of the hydraulic valve block from the German factory, the finished product quality is good and worthy of being produced by the German factory. The root cause of the leakage is that the perpendicularity tolerance between the thread of the hydraulic valve block and its mating surface reaches 0.08mm, which should not be higher than 0.05mm according to the working conditions. This tolerance dimension is difficult to control and has high requirements for the operator, We recommend changing the system design of the hydraulic valve block. If it is successful, samples of hydraulic valve blocks can be sent within 25 days. Berton has no better choice but to wait passively.

5 days after sending the sample, Berton was excited to inform that the sample of AAK's newly designed hydraulic valve block met the system requirements of the equipment and did not leak. The accuracy and efficiency of the hydraulic valve block were both improved compared with the hydraulic valve block of the German factory. Berton is curious about why AAK dares to change the design of the German factory. Even the engineers of his technical team admire the new design of AAK hydraulic valve block.

Based on the design of the German factory, AAK changed the whole oil circuit design. Some valve holes can be combined with the same unit to perform a specific type of control function, which is conducive to improving the execution efficiency of the hydraulic power system. At the same time, the pressure regulation loop, flow control loop and power supply loop are newly designed. The reason why AAK dares to make such changes is that we have an efficient machining center, MIKRON machining center and AMEC sinking drilling and milling cutter. This combined cutter can directly complete the processing of the dimensional accuracy required by the diameter of the threaded bottom hole and the sealing ring, and also the processing of the surface finish. Moreover, it has central internal cooling and allows faster cutting. In this way, man-made errors are eliminated in accuracy.

Berton said happily that he could finally ignore the arrogance of the German factory. The boss asked him to transfer the order directly to AAK, and the price was cheaper than that of the Germany factory. The boss was very satisfied with Berton's idea of finding a new supplier of hydraulic valve blocks.

AAK can not only make high-precision hydraulic valve blocks, including different types of hydraulic valves, but also help you with design solutions. You can try a small order.

AAK hydraulic valve block adopts multi edge particle cutting with diamond reamer, the accuracy can reach 0.002mm, and the surface roughness can reach Ra 0.2um, the precision is twice that of other hydraulic valve manufacturers, and there is no iron filings. Because the price of AAK hydraulic valve block is a little higher than that of peers, LIEBHERR excluded AAK from the supplier list. However, 3 months later, LIEBHERR still placed an order for the hydraulic valve block with AAK.

This morning, I received an order for hydraulic valve block from Herta from LIEBHERR company in Germany, which was a little unexpected. Because this is the hydraulic valve block that AAK sent sample for 3 months ago. Since the sample was sent, there was no news about the sample. After several follow up emails, the reply was "unqualified". I asked about the reason why the hydraulic valve block was unqualified, but didn't get reply. Now I can't understand why the order comes to us 3 months later.

Herta is mainly responsible for the procurement of hydraulic accessories of LIEBHERR. In the first half of this year, his company needed to purchase a batch of high-precision hydraulic valve blocks for hydraulic excavators. At that time, he selected 5 hydraulic valve factories to send samples to test the quality and conduct assembly tests. 3 months later, after comprehensive comparison, their technical team found that the test data of AAK hydraulic valve block was the best among the 5 hydraulic valve manufacturers.

I asked Herta curiously why the reply he gave us 3 months ago was "unqualified". He replied that your quotation was unqualified and more expensive than the other 4 hydraulic valve manufacturers, so we judged AAK to be unqualified. After 3 months of testing, the technical team believes that AAK's hydraulic valve block has the highest precision, the strongest durability and the simplest follow-up maintenance. Although the price of AAK is a little higher than that of other suppliers, according to the comparison of various parameters, the hydraulic valve block of AAK can enable LIEBHERR to reduce the cost of subsequent maintenance, so the technical department designated AAK to supply this hydraulic valve block.

Herta asked us why some parameters of AAK hydraulic valve block are twice better than those of peers? The high precision of AAK hydraulic valve block mainly comes from the diamond reamer used in AAK machining center, which is a multi edge particle cutting. In the reaming process, the chips are hidden between the diamond particles and thrown out via coolant flushing and high-speed rotation, so that the chip removal in the first step is complete. Herta said that the accuracy of AAK's hydraulic valve block is 0.002mm, while that of the other 4 hydraulic valve manufacturers are all 0.004mm or above, and the surface roughness of AAK hydraulic valve block can reach Ra 0 2um, and the processing diameters of the holes tend to be the same, which is why their technical team is convinced.

AAK hydraulic valve block has 3 advantages. You will know it after 3 months of trial. You are welcome to try the order.

Early last month, I saw an email from Mark, the purchasing manager of hydraulic system of Caterpillar, an old friend of ours. The subject of the email is "I need help from AAK, I believe". After reading the email about hydraulic threaded cartridge valve, I understood Mark's embarrassment.

A small less-known excavator designed by them at the beginning of this year was not smooth in the commissioning process, the response of the excavation part was slow and the power was not enough. After testing, the technical department found that the measured value of the maximum overflow pressure was lower than the specified value, so it was determined that there was a problem with the hydraulic threaded cartridge valve. Mark communicated with the original hydraulic valve supplier. The supplier mentioned that the hydraulic threaded cartridge valve was sampled according to their company's drawings, and all parameter tests were up to standard. The supplier told the fact. He then could only patiently communicate with the design department to see how to modify the hydraulic threaded cartridge valve design, but the design Department said that there was a problem with the installation of the technical team. The company's design and technology departments prevaricate with each other and Mark are caught in the middle, which is very embarrassing and time is also being wasted. If the boss is angry one day, it is estimated that all 3 parties will be criticized.

AAK HYDRAULIC VALVE has always been Mark's most trusted supplier of hydraulic valves. I asked Mark to send us the original design drawings of the hydraulic threaded cartridge valve and the working condition requirements of existing equipment, as well as the problems and data encountered in commissioning.

3 days later, we replied to Mark that we have a new design scheme, and we are 90% sure that we can make the hydraulic threaded cartridge valve that meet the equipment requirements, but it will take 2-3 weeks. On the 3rd day after receiving our sample of the hydraulic threaded cartridge valve, Mark happily informed us that the technical department tested AAK hydraulic threaded cartridge valve, the equipment commissioning was smooth, and the reaction and power of the excavation part were normal. The technical department said that the large goods of this hydraulic threaded cartridge valve can only come from AAK, and other hydraulic valve manufacturers are unreliable.

Caterpillar designers are also curious about how AAK HYDRAULIC VALVE redesigns this hydraulic threaded cartridge valve? AAK engineering team tried 30 times to design, sampling and make adjustment to find a breakthrough. A sealing ring groove is arranged between the oil replenishment outlet and the oil replenishment inlet of the oil replenishment valve seat of the hydraulic threaded cartridge valve. The oil replenishment valve seat is made into a cartridge valve body, a sealing ring is installed between the overflow valve seat and the rear end hole of the oil replenishment valve spool, and a spring with a set oil replenishment pressure difference is placed. For the hydraulic threaded cartridge valve with this structure, the excessive pressure oil can directly push the overflow valve spool from the oil replenishment outlet and automatically relieve the pressure. The whole overflow action is more direct and sensitive than before, and the pressure regulation response is fast, which protects the whole pressure system and the pressure is more stable.

After knowing the whole process, the boss praised mark, rewarded him with an extra week's holiday, and suggested him to increase cooperation with AAK HYDRAULIC VALVE. His colleagues in the technical department and design department also admire him for taking the initiative to solve the dilemma of the hydraulic threaded cartridge valve, and Mark's prestige in the company is getting higher and higher.

AAK is a designated hydraulic threaded cartridge valve manufacturer of Caterpillar. You can also have a small try.

Kate, the buyer of Terex company, was asked by the head office last month to purchase a batch of hydraulic pressure valves within 3 months. She vowed to the boss that it would be completed in 2 months. As usual, Kate sent the hydraulic pressure valve inquiry to more than 10 hydraulic valve manufacturers she was familiar with, including American hydraulic valve manufacturers and Chinese hydraulic valve manufacturers. She chose 3 factories to provide hydraulic pressure valve samples for testing. After the test, the technical department informed that only the hydraulic pressure valve samples provided by American manufacturer were qualified. The trouble is that the price of the qualified hydraulic pressure valve exceeds 40% of the company's budget price. She has no authority to decide to use the products of this American hydraulic valve manufacturer.

After discussion with the technical department, she learned that those unqualified hydraulic pressure valves are mainly due to the wear or fracture of the sealing ring after 15,000 times of impact during the durability test of the hydraulic pressure valve, resulting in the leakage of the hydraulic pressure valve. Only those hydraulic pressure valves that have not leaked for more than 40,000 times are qualified. She was very depressed that the quotation of the other 3 hydraulic pressure valves was within the budget, but the quality was unqualified. At this time, Kate realized why the company gave him 3 months to purchase. She hurriedly sent inquiry to new hydraulic valve manufacturers, and specially emphasized the need for hydraulic pressure valves with more than 40,000 durability tests. The trouble is that no hydraulic valve manufacturer gave her an offer. Kate realized the difficulty of procurement. She had wasted 3 weeks. Procurement was still in its infancy, and the technicians had been urging progress.

After learning about Kate's purchase status, the colleague recommended her to contact AAK HYDRAULIC VALVE to try. When we received the hydraulic pressure valve drawing from Kate, we first gave a quotation. She told us very frankly that the price of AAK was 20% higher than that of other China hydraulic valve manufacturers, but 15% cheaper than that of the United States. She needed us to reduce the price greatly. We suggested providing the hydraulic pressure valve samples for testing first, and then discuss the price after passing the test.

2 weeks later, Kate informed that the test was qualified and AAK hydraulic pressure valve durability test had reached more than 40,000 times. She was surprised why AAK passed the hydraulic pressure valve durability test, while the other hydraulic valve manufacturers in China failed. AAK hydraulic valve was also eliminated by customers 2 years ago because the durability test of hydraulic pressure valve failed to meet the standard. AAK has increased research and development on the sealing ring. After more than thousands of tests in half a year, AAK chose to use a special PU polyurethane rubber sealing ring from Japan to overcome this technical problem. Its wear resistance and high pressure resistance are far better than other rubber sealing rings. The vast majority of domestic hydraulic valve manufacturers use rubber sealing rings, and the maximum limit of their durability test is 20,000 times.

Kate realized that AAK was technically different from the other domestic peers, and the price was cheaper than that of American hydraulic valve manufacturers. She happily chose the AAK hydraulic valve with the highest cost performance.

AAK hydraulic valve has advantages only by comparison. You can also have a small try.

One morning in the first half of this year, shortly after Sam arrived at the company, the boss asked him to come to his office. He realized whether there was a complaint about the hydraulic valve. He saw that the technical director was also in the boss's office. It turned out that the hydraulic check valve installed on the hydraulic pump had leakage in different proportions. These hydraulic pumps were due to ship in 20 days. The boss asked him to purchase the qualified hydraulic check valve in 40 days, because their customer only gave the company a 4-week extension.

The technical director informed that according to the on-site detection, about 20% of the hydraulic check valves had leakage. After dissection, it was found that the gap between the valve body hole and the valve spool of these leaking hydraulic check valves was uneven, and some even exceeded 40μm. The gap dimensions are quite different. Sam immediately contacted the original hydraulic valve manufacturer and asked him to replenish 30% to replace those unqualified hydraulic check valves, but he was rejected. Per the original hydraulic valve manufacturer, these hydraulic check valves passed the inspection before delivery and the leaked hydraulic check valves were caused by their improper installation. In the end, the manufacturer didn't even reply to his email. Sam was angry and had to find a new supplier of hydraulic check valve.

Sam found AAK HYDRAULIC VALVE in Google and browsed AAK website (www.aakindustry.com), which made him see the dawn and feel that AAK hydraulic valve is different. He emailed us inquiry about the hydraulic check valve and truthfully informed us of the problems he encountered with the Chinese hydraulic valve manufacturer. After several rounds of e-mail communication and integrating the drawings and operating conditions provided by Sam, AAK promised him to offer qualified hydraulic check valve samples within 14 days. If the samples are qualified, the 30% of quantity that he needs can be delivered in 4 weeks.

After 14 days, Sam received the hydraulic check valve samples. There was no leakage after installation and commissioning, and the gap between the valve body hole and the valve spool of each hydraulic check valve could be stable within a range and uniform in size. The technical department told him that the standard deviation (sigma) accuracy of the clearance dimension of AAK hydraulic check valve was more than 3 times higher than that of the original supplier. Sam was surprised how AAK hydraulic valve was different?

The whole line of production equipment of AAK hydraulic valve is a high-precision machine tool and processing center imported from Switzerland. The core materials are imported from Germany and South Korea, ensuring the production accuracy of valve body and valve spool. The valve spool diameter of this hydraulic check valve is greater than 20mm, and the gap between the valve body and the valve spool needs to be 15μm-25μm, which is an industry requirement, but AAK uses 15μm-20μm as the hard index for production, which is 25% higher than the industry standard. Before each batch of production, the accuracy of each axis of the machine tool needs to be tested, including positioning accuracy, repeated positioning accuracy and reverse positioning accuracy. After obtaining the test data, the accuracy can be compensated. Most hydraulic valve manufacturers ignore this link. That is why the gap dimension standard deviation (sigma) accuracy of AAK is more than twice that of Sam's old hydraulic valve supplier.

AAK completed 30% quantity of hydraulic check valves on schedule. Sam solved the unsuccessful procurement without danger. The boss praised him for completing the procurement on schedule and suggested him to find more hydraulic valve suppliers like AAK.

AAK hydraulic check valve has guaranteed quality and after-sales service. Our quality benchmarked with international first-line brands. You can also give it a try.

AAK uses endoscope C50 to detect the internal burr of the hydraulic valve block, and then sprays the burr remaining in the hydraulic valve block with high-pressure solution, so that there is nowhere for the burr to hide. Nearly 95% of domestic hydraulic valve manufacturers are not equipped with endoscope and ignore 100% removal of the residual burr of the hydraulic valve block. The American customer who has suffered a loss elsewhere chose to order from AAK again.

Most domestic hydraulic valve manufacturers use conventional physical methods to deal with the burr of hydraulic valve block, and check whether the burr is cleaned by experience, especially the burr of deep hole or magnetic burr, which can hardly be cleaned. It is common that the defective rate of hydraulic valve block exceeds the standard due to human error.

At the beginning of last year, we received an inquiry for hydraulic valve block from Hunter, an American customer. We calculated the price according to his hydraulic valve block drawings. Hunter was not satisfied with our quotation. Because the communication was very pleasant, I wanted to make friends with hunter and gave up my commission to adjust the price. Hunter frankly said that although the new price of AAK hydraulic valve block meets his target price, the prices of other hydraulic valve manufacturers are still cheaper than those of AAK. We can only withdraw from the purchase of hydraulic valve block amicably.

If something goes unusual, there will be problems. 2 months later, Hunter came back to us and said that he was very willing to accept our quotation for hydraulic valve block. He informed that there were different degrees of burrs at the internal cross holes of the hydraulic valve block samples proofed by the original hydraulic valve manufacturer. The hydraulic valve block samples were modified 3 times. Each time the cartridge valve was installed and debugged, the valve spool was stuck from time to time. The factory has also conducted commissioning for many times, and has been unable to remove burrs for 100%. He can only give up this hydraulic valve manufacturer and came back to AAK.

Burr must be produced in the drilling process of hydraulic valve block, which is very harmful to the hydraulic system. In addition to adopting appropriate treatment process for burr removal, it is also necessary to have relevant auxiliary testing equipment to guarantee the complete 100% removal of burr. Hunter asked us to arrange approval samples of hydraulic valve block immediately. After 15 days, we sent the hydraulic valve block samples. On the 3rd day after Hunter received the samples, he sent an email to inform AAK that the samples passed testing at one time.

Hunter admired that AAK can get the hydraulic valve block samples approved at one time that the peer can't get approval at 3 times. At the same time, he also expressed his curiosity about how AAK can accurately remove the burrs? Because this hydraulic valve block has many internal cross holes and deep holes. Firstly, the accurate position of burr in the hole must be found, and then the burr shall be removed by high-pressure solution jet. Then, AAK has one more process than peers, using endoscope C50 to recheck the subsequent residual burr. If there is still residual burr, it shall be cleaned and rechecked again until it is completely eliminated. This is the detail awareness lacked by other hydraulic valve manufacturers, and also the reason that AAK can achieve 100% deburring.

Details make a difference. AAK concentrates on details, strives for perfection. You can purchase at ease, use at ease for all types of hydraulic valves produced by AAK.

On Monday afternoon, I received an email from Tony. Tony is a purchasing manager of CASAPPA in Italian, mainly responsible for the purchasing of hydraulic pump components, and the work has been very smooth. Last month, they received a complaint from the largest customer that the pressure at the outlet of the hydraulic pump sometimes rises by itself, resulting in unstable operation of the equipment. The customer's site engineer couldn't solve it and turned to CASAPPA for after-sales service. Although the warranty period has expired, they still need to help customer solve the problem. Their engineers tested various parameters of the hydraulic pump. After comprehensive analysis, they were still uncertain about the root cause, but they suspected that the hydraulic pressure relief valve in the pump is faulty.

The engineer asked Tony to contact the original supplier of the hydraulic pressure relief valve and ask him to send a sample of the hydraulic pressure relief valve for replacement and test. It is a local hydraulic valve manufacturer and they still have samples in stock. After receiving samples and commissioning, the engineer's suspicion was proved to be correct. After replacing the hydraulic pressure relief valve, the hydraulic pump worked normally. Tony asked the original hydraulic valve manufacturer to urgently replenish 30 hydraulic pressure relief valves to solve this complaint. The manufacturer said that the shipment has passed the two-year warranty period. At present, there are only 3 samples in stock. The remaining quantity needs to wait in production schedule for production, and can only be delivered after 3 months. If offering this plan to the big customer, Tony would be scolded by the boss. He thought of AAK, because the hydraulic valve failed last year, which was also solved by AAK.

Tony established a business relationship with us last October. Now we are also friends besides business. We often discuss the knowledge related to hydraulic valves. His email on Monday is just to ask for help on this hydraulic pressure relief valve. After knowing these conditions, I asked him to send us samples of those faulty hydraulic pressure relief valves, and provide us the drawings of this hydraulic pressure relief valve, noting those special requirements.

After receiving and disassembling the samples from Tony, we found that the main valve spool of the hydraulic pressure relief valve was too loose and had increased leakage, then the pressure at the oil outlet increased. The problem should be caused by high-frequency wear or insufficient accuracy of the original shipped hydraulic pressure relief valve. The engineer of CASAPPA asked us to reply why it was determined that it was the problem of the valve spool? Because in the pressure reducing control circuit, after the directional valve works, the flow at the valve outlet becomes zero, but the pressure still maintains the originally set pressure. In this case, the flow through the pressure reducing port is only pilot flow. Due to the small pilot flow, which is generally within 2L / min, the pressure reducing port of the hydraulic pressure relief valve is basically close to the fully closed position and the opening is very small. According to the flow continuity theorem, this part of leakage must also flow from the damping hole of the main valve spool, that is, the flow through the damping hole is composed of pilot flow and leakage. The area of the damping hole and the oil pressure in the spring chamber of the main valve remain unchanged (the oil pressure in the spring chamber is determined by the pre compression shrinkage of the pressure regulating spring that has been adjusted). In order to increase the flow through the damping hole, the oil pressure in the lower chamber of the main valve will inevitably increase. Finally, it is determined that the main valve spool of the hydraulic pressure relief valve is too loose or the accuracy is not enough. The engineer was convinced by our whole demonstration and suggested Tony to take AAK as their main hydraulic valve supplier.

AAK produced 30 hydraulic pressure relief valves in 15 days and guaranteed the quality for 3 years. Half a month later, Tony sent an email saying that everything was normal with the hydraulic pump after using AAK hydraulic pressure relief valve. The customer fed back his appreciation to his boss, who was particularly satisfied with his ability to deal with the crisis decisively and paid more and more attention to him.

AAK has been doing what peers are unwilling to do. If you have any problem about hydraulic pressure relief valve, or about hydraulic pressure control valve, you can also contact us to have a small try.

Martin, a purchaser of American company PowerTeam, sent an email last week saying that he saw on the Internet that AAK was a hydraulic valve supplier of some European hydraulic pump companies. He wanted to know whether the quality of AAK could match the quality of the hydraulic valve produced in the United States he was currently using. I directly answered that the quality of hydraulic valves in the United States should also be in different levels, you can have a small try and compare them with your hydraulic valves purchased in the United States.

Martin frankly told about his current purchasing status. He needed to re-purchase a batch of hydraulic sequence valves for hydraulic pumps. After placing an order with the original manufacturer in the United States, the manufacturer told him that there were not enough labor for mass production at this moment. He had to wait for 3 months at least. The boss was not satisfied with his purchasing arrangement and asked him to find a new supplier of hydraulic sequence valve and complete production within 2 months. Martin is a little embarrassed because this hydraulic sequence valve has particularly high requirements for various accuracy. In the early stage of development 3 years ago, he contacted more than 20 hydraulic valve manufacturers, compared and tested the hydraulic sequence valves from them, and only the samples from the local hydraulic valve manufacturer in the United States met the requirements.

Martin saw the information of AAK to found that it was actually the supplier of hydraulic pumps in Europe. After browsing AAK website (www.aakindustry.com), he felt that AAK hydraulic valve might become his supplier. According to the drawings and working conditions of his hydraulic sequence valve, we found that it does have high requirements for the accuracy of the hydraulic sequence valve. I told Martin that we need 15 days to make and test samples. After the samples of the hydraulic sequence valve pass the test, we will discuss the order at that time.

10 days after the hydraulic sequence valve sample was sent, Martin emailed AAK that the hydraulic sequence valve fully met the production requirements of the existing hydraulic pump. At the same time, the engineers of PowerTeam also applauded every detail of AAK hydraulic sequence valve sample, which was no worse than that of the American company. In particular, some core parameters, such as the matching surface roughness of AAK hydraulic sequence valve spool and valve hole, can reach Ra value of 0.1 ~ 0.2μm. The surface roughness Ra value of the outer circle of the valve spool is 0.1μm. The Ra value of the inner circular surface of the valve hole is 0.2μm. Some parameters are even higher than those of his original American manufacturer, including 100% burr removal.

Martin was surprised how AAK hydraulic sequence valve achieve these?

AAK hydraulic valve has two absolute advantages and has already surpassed its domestic counterparts. It is uncertain whether it has surpassed its American counterparts.

1. AAK has a high-precision CNC machining center imported from Switzerland and independent fixtures upgraded and refitted by itself, eliminating human errors.

2. The independent professional R & D team cooperates with the unique R & D technology to realize the personalized customization demand of hydraulic valve accuracy, which can not be achieved by 95% of domestic peers.

When Martin got the quotation of AAK hydraulic sequence valve, it was 23% cheaper than that produced locally in the United States, but the quality was no worse than that produced locally. AAK needed a lead time of 35 days for production, and the whole time was also in line with Martin's re-purchasing time schedule. After finalizing the whole order, Martin reported to the boss. The boss was very happy that AAK hydraulic sequence valve benchmarked the American quality, and also saved the purchasing cost. Martin told me that his boss asked him to send samples of previously purchased hydraulic valves to AAK for quotation.

AAK hydraulic sequence valve keeps pace with American manufacturers. Not only the hydraulic sequence valve, our quality of hydraulic flow control valve also convinced a Germany customer. Welcome to have a try!

When I opened the mailbox this morning, I saw a reorder for 500 pilot hydraulic relief valves from Jimmy. He mentioned that the pilot hydraulic relief valve designed by AAK had been used for 2 years and without any complaints. Jimmy is a purchaser of American company Vickers, responsible for the purchasing of hydraulic parts. 2 years ago, his company encountered a complaint from customer for a hydraulic pump. The customer complained that it screamed after being used for a period of time. After dissecting, their engineer found that there was a problem with the hydraulic relief valve in the hydraulic pump. The boss asked Jimmy to solve the problem as soon as possible. Jimmy sent the hydraulic relief valve back to the original supplier, but the supplier replied that the inspection result was good. Maybe the problem happened during installation. Jimmy’s engineers tested the samples by themselves and found that there was no problem with the hydraulic relief valve, but there was also no problem with the installation method and operation. Now Jimmy is depressed. The boss is pushing for status, but he has no clue.

He contacted with several local hydraulic valve manufacturers in the United States, and they all replied that there was no problem on the hydraulic relief valve. One day, after browsing AAK website (www.aakindustry.com) in Google, Jimmy sent an email asking if AAK could help analyze the reason. We replied that it would be better for engineers to have video communication on site

Jimmy decided to ask Vickers engineers to make a video with AAK engineers the next morning. After more than half an hour of observation, AAK engineers found that once the pressure oil at the inlet, outlet and control port of the hydraulic relief valve fluctuated, it would produce a scream. We got their original samples and drawings, as well as the working parameters of the hydraulic pump.

After 15 days, AAK sent a sample of the pilot hydraulic relief valve. A week later, Jimmy e-mailed us that AAK hydraulic relief valve was installed and tested on site for 24 hours, and there was no scream. Jimmy wondered why there was no scream when AAK hydraulic relief valve was used.

AAK engineers analyze the cause from the hydraulic impact. After the hydraulic pressure impacts the main valve spool in the hydraulic relief valve, the pressure oil converges through the check valve, resulting in fluid impact and fluctuation, causing the hydraulic relief valve to oscillate, resulting in the instability of the pressure oil at the outlet of the hydraulic pump. Because the pressure oil output by the pump itself has pulsation, the pressure oil output by the pump will fluctuate strongly and arouse the vibration of the hydraulic relief valve. For the natural frequencies of the two hydraulic relief valves are the same, it causes the resonance of the relief valve and the scream occurs. AAK engineers changed the design to replace the two hydraulic relief valves with the same pilot hydraulic relief valves, and set the corresponding overflow value according to the working conditions. The sample was made based on this process idea.

After solving the problem that bothered Jimmy for half a year, he can finally confidently report to his boss. After listening, his boss also praised AAK hydraulic valves and hoped that AAK can produce 50 pilot hydraulic relief valves as soon as possible to solve the complaints from users first. With AAK unique designed pilot hydraulic relief valve, there has been no complaint about scream for two years. Jimmy doesn't want to find a second supplier anymore.

AAK pilot hydraulic relief valve, the unique design of the remedy to the case, welcome to have a small try!

Bryson is a hydraulic customer from the UK. Recently, a batch of hydraulic cartridge valves he temporarily purchased were in trouble. Because the parameters from customer were not complete, he used the same model product recommended by the hydraulic valve manufacturer instead. During testing, the flow parameters were not equal. The rated flow of the hydraulic cartridge valve was smaller than the working flow and could not be used normally, which wasted more than 10 days and the delivery time was urgent. He contacted with more than 10 hydraulic valve manufacturers. For hydraulic cartridge valves of the same model, their rated flow setting is either smaller than the working flow or close to the working flow of the system. Bryson was very distressed that no hydraulic cartridge valve has a rated flow setting greater than the working flow.

Bryson found AAK HYDRAULIC VALVE. From AAK website, he felt that AAK HYDRAULIC VALVE was a little different from other hydraulic valve manufacturers. With a try attitude, Bryson actively contacted us and sent us the product picture and product model of this hydraulic cartridge valve. He just emphasized that the rated flow must be greater than the working flow and asked us to recommend the hydraulic cartridge valve of the same model, there was no any parameter information. After careful comparison, AAK engineers sent pictures and drawings of a hydraulic cartridge valve of the same model. Bryson asked us to send the hydraulic cartridge valve samples as soon as possible.

On the 3rd day after receiving the hydraulic cartridge valve sample, Bryson emailed to inform that the rated flow of AAK hydraulic cartridge valve can really meet the normal operation of their current hydraulic system. Bryson expressed his curiosity that the hydraulic cartridge valve model recommended by AAK is consistent with that recommended by other manufacturers. How can there be such a big difference in the rated flow setting?

For the selection of flow specifications of hydraulic valves, the settings of each factory are different. If the rated flow of the valve is close to the working flow of the system, this situation is the most economical and cost-effective, and it is also the first choice of nearly 90% of hydraulic valve manufacturers. But there may be a problem, once the working flow in the hydraulic system exceeds the rated flow, it will cause hydraulic clamping and affect the hydraulic power. It will also have an adverse impact on the hydraulic system of the valve. To be safe, when all cartridge valves are produced, AAK will give priority to the maximum flow that may pass through the circuit where the hydraulic valve is located, and the setting of rated flow is greater than the maximum flow of operation, so as to ensure the normal operation of whole system, which is also the reason why most customers prefer AAK.

After knowing this information, Bryson is more convinced that AAK HYDRAULIC VALVE is different from other hydraulic valve manufacturers. It has been more than 3 months since we shipped the last goods to Bryson. Today, 200 hydraulic cartridge valves are re-ordered. Bryson told me that since AAK hydraulic cartridge valve was used, there was no hydraulic clamping problem in the hydraulic system. Their sales increased by 30% compared with the same period. The boss was very satisfied with his procurement work.

The rated flow setting of AAK hydraulic valve meets the flow requirements of each system. Welcome to try an order!

At the beginning of this year, CATERPILLAR received an order from African customer for excavators with a delivery time of 2 months, which means that all accessories must be in place within 1 month, including 600 hydraulic cartridge valves. The production time for the factory is a little more than 2 weeks. The purchaser Peter sent the order information of the hydraulic cartridge valve to all the hydraulic valve manufacturers he contacted before at the first time. More than 20 hydraulic valve manufacturers said that they could not complete the order of the hydraulic cartridge valve in such a short time, and it would take at least 3 - 4 weeks. His supervisor was not satisfied with this delivery time and asked him to find a new hydraulic valve manufacturer. After the email was sent, there was basically no sound. Peter was very helpless and worried.

Peter asked Mark for help. Mark emailed AAK HYDRAULIC VALVE to ask if AAK could produce 600 hydraulic cartridge valves in 2 weeks and CC Peter, and joking at the end of the email that if AAK HYDRAULIC VALVE could not complete the hydraulic cartridge valve order, then there is no need to waste time on looking for a new hydraulic valve manufacturer.

According to the drawings they sent, AAK technical department found that this was very close to the hydraulic cartridge valve supplied to a Russian customer last year, so the time in the early stage of the production of the hydraulic cartridge valve was saved. After the price of the hydraulic cartridge valve was approved, the process data could be configured on the computer on the same day and the production could be carried out the next day.

2 weeks later, 600 hydraulic cartridge valves were delivered on time, which was the first of all the accessories purchased by Peter to arrive at the company's warehouse. Peter didn't expect that the hydraulic cartridge valve he was most worried about was the first to be completed.

Peter appreciated the advice from Mark and was also surprised that AAK could complete this in 2 weeks, while his previous hydraulic valve suppliers needed 3-4 weeks. Mark told Peter:

1. AAK is his most trusted hydraulic valve manufacturer. AAK can surprise him every time when the hydraulic valve order is urgent.

2. AAK has a large amount of data storage and clear classification. For hydraulic valves with relevant data, they can use the most advanced UG / SOLIDWORK software and finite element analysis method to configure process data in 2 hours, which is 3-6 times faster than that of other suppliers.

3. AAK is equipped with advanced machine tools imported from Swiss, coupled with their own modified fixtures, the production speed is accelerated and man-made errors are avoided at the same time.

After listening to the introduction from Mark, Peter realized that only a good hydraulic valve supplier can make his purchasing smooth.

CATERPILLAR successfully completed this urgent order. The boss was very happy when he heard the news. For Peter, who was the first to complete the purchasing, the boss affirmed his purchasing ability and praised him at the meeting. Mark told me privately that Peter was very happy because his boss gave him a promotion because of his excellent performance this time.

AAK hydraulic cartridge valve has reliable quality and guaranteed delivery date. We are a manufacturer good at and focused on hydraulic cartridge valves only. Welcome to have a small try!

During Power transmission and control technology exhibition in Shanghai last year (PTC Asia), Italian ATOS company asked Richard to find a qualified hydraulic valve block supplier from Chinese hydraulic valve block manufacturers through the exhibition and supply for the branch in Malaysia. He spent a whole day at the exhibition. He went into almost every booth of Chinese hydraulic valve block manufacturers and selected more than 20 Chinese hydraulic valve block manufacturers. He communicated with us AAK for more than half an hour, and took some data with him. When he left, he said that AAK was the Chinese hydraulic valve block manufacturer he spent the most time today. After the exhibition, he would test samples of AAK hydraulic valve block. He would select 6 hydraulic valve block manufacturers from the more than 20 Chinese hydraulic valve block manufacturers he found.

1 week later, Richard sent us the sample drawings and working condition requirements of the hydraulic valve block. This hydraulic pump of ATOS should not only meet the international standards of ISO6020 and 6022, but also have a peak pressure of 450bar. At the same time, it has accuracy requirements for all surfaces of the hydraulic valve block.

2 weeks later, Richard received hydraulic valve block samples from 6 Chinese hydraulic valve block manufacturers. In general, there will be news within 2 weeks after the sample is sent. We asked Richard for feedback but just got reply of waiting for results. We thought it to be no results any more. 1 month later, Richard emailed that the chief engineer of the Malaysian branch advised that 3 of the 6 Chinese hydraulic valve block manufacturers met the requirements, but the accuracy of AAK hydraulic valve block was much higher than that of the other 2 Chinese hydraulic valve block manufacturers. AAK reassured them.

The surface roughness of AAK hydraulic valve block flange reached Ra0 3, which is 30% more accurate than the other 2 Chinese hydraulic valve block manufacturers. At the same time, the perpendicularity between the screw hole of the pipe joint and its external fitting surface is Grade 8. The roughness of the mounting hole is Ra0 5, which is also 30% more accurate than the other 2 Chinese hydraulic valve block manufacturers. The surface roughness of O-ring groove is Ra1 5, while the other Chinese hydraulic valve block manufacturers are Ra5.0-6.5. These data of AAK have been benchmarked with their old hydraulic valve block suppliers in Germany. Richard quickly made a report to the boss according to AAK quotation and production time. The accuracy of the hydraulic valve block is comparable with that of the original supplier, but the price is 20% cheaper, and the lead time is 30-40% shorter.

Richard wondered why among so many Chinese hydraulic valve block manufacturers, only AAK benchmarked the German factory?

Before processing, AAK uses German COMET flaw detector to detect the blank of hydraulic valve block to ensure that the internal structure of the hydraulic valve block is dense and free of interlayer, trachoma and other defects. This step is generally ignored by other manufacturers. Then select the composite tool for processing, and combine two or more similar or different hole processing tools into one special tool. One tool can process the threaded bottom hole, 45°, 15°, R0.1 chamfering and external counterbore at the same time, and it can complete multiple processes such as drilling, expanding, reaming, spot facing and boring in the process of one machining. We don't know whether there is a second manufacturer mastering these technical essentials, maybe, maybe not.

The boss was surprised that Richard found such a Chinese hydraulic valve block manufacturer and asked him to test an order for 500 hydraulic valve blocks. Richard asked AAK to guarantee on time delivery. The boss said that if it went well, he would be given a promotion and a raise.

AAK is a trusted hydraulic valve block manufacturer in China. Welcome to contact us for cooperation.

Chapman comes from a hydraulic equipment manufacturing company in Italy. He has been in the company for 3 years and is highly regarded by his boss. However, the hydraulic pilot relief valves purchased at the beginning of the year has been in a big trouble, which makes his boss more and more disappointed with him. They sold a batch of hydraulic power units, and there was squeal or vibration. They judged that it was caused by the abnormality of the hydraulic pilot relief valve. However, when they tested the hydraulic pilot relief valve separately, the parameters met the standard, and no abnormality was found. In a week, Chapman contacted different hydraulic valve manufacturers online and offline, but it was fruitless. The original manufacturer of the hydraulic pilot relief valve could not provide constructive suggestions. The boss is urging the after-sales plan. Chapman has not found the root cause of the equipment howling yet and has a big headache.

Chapman tried to source Chinese hydraulic valve manufacturers on Google. He was surprised that AAK's natural ranking in Google actually ranked on the home page. He left a message to ask if AAK could solve the squeal of the hydraulic pilot operated relief valve. I didn't answer yes or no, but only sent him two links about the squeal solution of the hydraulic valves. AAK has solved the squeal of the hydraulic relief valves for 2 customers. 10 minutes later, Chapman sent the drawings of the hydraulic pilot operated relief valve and the product pictures of the original manufacturer. Our engineer asked him to separate the hydraulic relief valve into two halves along the axis of symmetry, with partial drawing pictures.

The next day, I told him that it was not difficult to stop whistling, it is better to make samples directly. After 50 days, AAK sent 40 samples of hydraulic pilot operated relief valves for him to replace the ones on the equipment complained by customers. Last week, Chapman sent a PO for 360 hydraulic pilot operated relief valves, and told that it had been 6 months since AAK hydraulic pilot operated relief valves have been used on the equipment. There was no customer complaint about squeal or vibration, and the customer was satisfied. His boss asked him to replace all the original hydraulic pilot operated relief valves and only choose AAK.

Different hydraulic relief valves have different causes of squeal, it needs a case by case analysis. Our engineer found that the dynamic performance of this hydraulic relief valve was not very smooth, so he set dynamic damping in its valve spool cavity. This damping and spring cavity constitute a first-order inertial link. The turning frequency is higher than the natural frequency of the second-order oscillating link of the valve spool, which can form an inter stage dynamic pressure feedback, improve the dynamic process, and effectively reduce the vibration of the dynamic process. The greater the vibration, the stronger the damping effect.

AAK hydraulic pilot operated cartridge relief valve, no squeal, no vibration, you can also have a small try!

Donald, a hydraulic valve customer from the United States, recently had an order for hydraulic valve sleeve parts with an old supplier. It took more than 30 days to adjust the approval sample of hydraulic valve sleeve for many times. The taper of hydraulic valve sleeve always failed to meet the customer requirement of 0.3-0.5μm. The manufacturer can only give up the order, but this wastes Donald's time. The trouble is that the customer is still urging the progress of the modification of the hydraulic valve sleeve. Donald consulted more than 30 hydraulic valve manufacturers online, but none of them can guarantee that the taper could reach 0.3-0.5μm. Only 2 manufacturers indicated that 1-2μm is the limit that they can reach. Donald plans to give up this hydraulic valve sleeve order, but he doesn't know how to talk to the customer.

While Donald was worried, his colleague Smith gave him the contact information of AAK HYDRAULIC VALVE. Smith had inquired about the hydraulic valve with AAK before. Smith directly emailed us the inquiry requirements and the drawings of the hydraulic valve sleeve, and CC Donald. He asked us to communicate with Donald directly to see how to solve the taper requirements of the hydraulic valve sleeve.

After our technical department had a meeting, they found that it was really a bit tricky. At present, they are not sure to tell the specific accuracy of the taper of the hydraulic valve sleeve. Except for the taper of the hydraulic valve sleeve, the straightness and roundness can fully meet the requirements. We can study the taper of the hydraulic valve sleeve while proofing. However, the specific parameters still need to be determined until the final samples come out.

With a try attitude, Donald asked us to start sampling the same day. A week later, we sent out the samples of the hydraulic valve sleeve. A few days later, Donald asked by email if we could try again to improve the taper accuracy of our hydraulic valve sleeve from 0.8-1.2μm to 0.3-0.5μm to meet the customer requirement. AAK technical department made modification and adjustment for 3 days and 2 nights, and sent the modified sample of hydraulic valve sleeve on the 4th day. Donald soon informed that the parameters of the second hydraulic valve sleeve sample of AAK met the requirements. Donald is curious that more than 30 hydraulic valve manufacturers can't achieve the taper accuracy of hydraulic valve sleeve. How can AAK achieve it by making samples only in two times?

As a precision part, the precision of hydraulic valve sleeve is guaranteed by operators and equipment, especially precision grinding is very important.

For most hydraulic valve manufacturers, the length of the grinder they used is basically an extended grinder with a hole length of 120%. Although it can repair and maintain the hole straightness, the accuracy of the hydraulic valve sleeve can only be controlled at 1-2μm maximum. 3 years ago, AAK adopted a grinder with a length of about 90% of the hole length, which can reach 0.5μm taper, but not stable. The taper can only be improved to about 0.5μm until the cylindrical grinder is explored to replace the extended grinder. Our proofing master has been groping on the machine for more than 12 years. He has worked out the process step by step and constantly corrected the operation method to obtain the fixed process, so as to ensure the 0.3-0.5μm accuracy high requirements of the hydraulic valve sleeve.

AAK hydraulic valve has been pondering precision and never stopped. You can also have a small try.

When I opened the mailbox this morning, I saw an email from Bruce, which should be a re-order for the hydraulic relief valve, because he asked about the durability of AAK hydraulic relief valve spool last week. Opening the e-mail, it is indeed the need for purchasing a large number of 420 hydraulic relief valves, and requiring 3 years of quality guarantee.

Bruce is a purchaser of Konecranes in Finland. 3 years ago, a customer of his company complained that the crane was easy to depressurize during work, resulting in the inability of the crane to bear the force. Especially after the working temperature reaches 55 ° C, the pressure cannot go up. Field engineers believe that this is a problem of the hydraulic system, such as low pressure regulation of the hydraulic relief valve, wear of the hydraulic system, or oil pollution. No abnormality was found after inspection. Finally, it was determined that the fault occurred on the hydraulic relief valve. After disassembling the hydraulic relief valve, it was found that the cone valve spool was worn, affecting the sealing of the hydraulic system, so the oil pressure could not rise. The customer does not understand why the valve spool of this hydraulic relief valve is worn after less than 2 years of use. The customer requested to replace with a batch of hydraulic relief valves with durability of more than 3 years and use them on these 12 faulty cranes.

At that time, Bruce contacted more than 10 hydraulic relief valve manufacturers and got reply that the warranty could not be achieved for 3 years. Some hydraulic valve manufacturers replied that they only have 50% confidence. This result embarrassed Bruce. The customer requirements for the hydraulic relief valve could not be implemented, how he should explain to the boss.

I received message from Bruce on the company website of AAK (www.aakindusrty. Com): "can AAK really provide a 3-year warranty hydraulic relief valve? I replied directly: just give it a try then you will know. I can't make money with the trial orders of several samples, and you can't lose money. Maybe Bruce was stimulated and sent us the test order the next day for 4 hydraulic relief valves. Bruce also frankly told AAK that two other hydraulic valve manufacturers would also try the order at the same time. Their plan is that each factory will be tested for 4 samples, with a total of 12 hydraulic relief valves to meet the urgent needs of customer first.

About 2 years after the samples were sent, we received email from Bruce again for another trial order of 8 hydraulic relief valves. I felt strange and thought that they actually didn't have big quantity order for hydraulic valves. Until last week, from his email, we learnt that they had tested the hydraulic relief valves provided by AAK for 3 years. Indeed, 3 years later, AAK hydraulic relief valves still worked normally, and the hydraulic relief valves provided by the other two manufacturers had faults in less than 2 years.

According to the working conditions, we understand that the core of durability of the hydraulic relief valve from Bruce is the valve spool, so we use the bearing steel imported from Korea and use our brains in heat treatment. After hot rolling, the steel is spheroidized and annealed, and then cold drawn. The processed bearing steel has high hardness, high wear resistance and hardenability. It is difficult to find other steels to benchmark it. Wear resistance for 3 years is certain, and maybe there is no problem for 5 years.

AAK hydraulic relief valve, impressed Bruce with its high durability. If you also encountered a hydraulic relief valve failure, just contact us to give it a try!

AAK hydraulic pressure control valve is made of 100Cr2 bearing steel, with high hardness and high wear resistance. It also adopts distinctive heat treatment process, to ensure that the hydraulic valve has no cavitation. It takes only 2 weeks to solve the customer complaint and helps Erich out of the dilemma.

Erich has been doing well in Linde company for several years. Recently, he was under great pressure due to a complaint. A hydraulic pump produced by Linde company went on strike after 8 months of use. The customer complained directly to the boss, who asked the after-sales department to find out the cause and solve it immediately. After inspection, the engineer found that mechanical damage had occurred on the metal surface of the pump, and the surface of the damage showed sponge like small holes, which should be caused by the hydraulic impact formed by the internal hydraulic system. At the same time, it was found that the hydraulic pressure control valve used in the system was the most serious, and no problems were found in other components. It was basically determined that the poor cavitation resistance of the hydraulic pressure control valve led to the strike. The boss asked Erich, who was responsible for the purchase of hydraulic pressure control valves, to re purchase hydraulic pressure control valves for these inoperable pumps within 20 days, to make sure no cavitation.

Erich contacted the original supplier of hydraulic pressure control valve and informed him of the whole situation. The original supplier mentioned that before production, Erich didn't inform the current working condition. To meet this working condition, materials must be customized, which would not be allowed by the time, because it would take at least 40 days. Erich also contacted a number of hydraulic valve manufacturers and got the replies that they either could not meet the quality requirements or the time would not be enough. This is troublesome. It's too late for the 20 days of time frame given by the boss.

Erich thought of AAK hydraulic valve, because he had a hydraulic pressure control valve sampled here last year, but didn't have any further contact due to AAK quotation was high. Erich asked by email whether AAK can solve the cavitation of hydraulic pressure control valve. According to the cavitation picture of the hydraulic pressure control valve provided by Erich and verifying the hydraulic working conditions, we replied that the materials used for this hydraulic pressure control valve need to be treated. However, AAK has inventory, because an American customer purchased similar hydraulic pressure control valves last month, we can send 4 samples of hydraulic pressure control valves within 14 days.

After Erich received the samples of hydraulic pressure control valve, their engineers installed it for debugging and it can work normally. Erich asked us to prepare materials quickly. His boss asked to replace all the hydraulic pressure control valves in this batch to avoid further complaints from customers. At the same time, he asked us to ensure that the mass production should be stable and there should be no cavitation.

The most important factor to avoid cavitation is the material selection of steel and the heat treatment of steel. According to the customer hydraulic working conditions, A AK selects 100Cr2 bearing steel and adopts carbonitriding heat treatment process. It is carburized at high temperature of 820-830 ℃ for 13 hours, then oil quenched, - 60 ℃ to - 70 ℃ cryogenic treatment and 150 ℃ to 160 ℃ tempering treatment. The whole molecular structure of the steel is uniform and the hardness can reach HRC68. After such heat treatment, the comprehensive properties are very stable, uniform hardness and good wear resistance. Wear resistance and high contact fatigue strength ensure no cavitation.

AAK hydraulic pressure control valve, no cavitation, has the stability admired by customers, you can also give it a try!

AAK hydraulic directional control valve, which has been used for 2 years, is free of rust and corrosion. It stands out from 3 hydraulic valve manufacturers. Joseph finally received a large order for 1000 hydraulic directional control valves from customer.

Joseph is the purchasing manager of a hydraulic pump company in Italy. Two years ago, the company received a test order for a special chemical hydraulic pump, which needs a hydraulic direction control valve. The customer requires that after 2 years, if the hydraulic directional control valve is free of rust and corrosion, it will have the opportunity to obtain a large order. The boss asked Joseph to find a very professional hydraulic valve manufacturer.

Joseph knew that relying only on the existing hydraulic valve suppliers is not enough to guarantee the quality. He checked with all the hydraulic valve manufacturers he had contacted before and the new ones searched online, and selected 16 hydraulic valve factories, including AAK Hydraulic Valve. He asked all hydraulic valve manufacturers to provide 2 samples of hydraulic directional control valves according to the drawing requirements of the customer for testing at their headquarters.

According to the post analysis to the drawing of hydraulic directional control valve from Joseph, we found that there is no problem to meet the accuracy, sensitivity and durability of this hydraulic directional control valve, except that the finish of the outer surface of the hydraulic directional control valve must be free of abnormality, rust and corrosion after 2 years of use, which is too uncertain.

We didn't receive email from Joseph until 15 days after we sent out the hydraulic directional control valve samples. According to their simulation test, only the hydraulic directional control valves from 3 factories can be approved to send samples to their customer. It would take 2 years for AAK to know if we can get the order of hydraulic directional control valve. At that time, we were very surprised that there were such strange customers.

We almost forgot the test order of this hydraulic directional control valve 2 years ago. Last week, Joseph sent an email asking about the production time and new price of 1000 hydraulic directional control valves, and told us that the surface of the hydraulic directional control valves from other two hydraulic valve manufacturers began to have scratches, corrosion, fading and rust after more than a year of use, only the surface gloss of AAK hydraulic direction control valve does not change.

In fact, when we sent out the hydraulic directional control valve samples, we were not 100% sure to meet this special requirement, because we used a new process to proofing. We know that the conventional nickel plating, chromium plating, zinc plating, blackening and other processes basically can not keep the same appearance after 2 years of use. We adopted electroless nickel plating. The principle of this process is to generate a coating on the metal surface by solution chemical reduction reaction, and the coating is amorphous. After treatment, the surface of the metal is smooth, corrosion-resistant and wear-resistant, and the coating film has few pores and uniform thickness. At the same time, the hardness of the heat treatment can reach HRC70.

After confirming the order, Joseph privately reminded us several times that the surface finish treatment of large goods should be careful. His boss said that after this order was shipped smoothly, there would be more and more inquiries later, and his salary was raised by 2 levels.

AAK hydraulic directional control valve is rust free and corrosion free. It is still the same as the new one after being used for 2 years. Welcome to have a small try!

Erdmann has been a purchaser of German HAWE company for 5 or 6 years and has been doing very well. Last month, the company had a special hydraulic threaded cartridge valve to purchase. Because it is to be used in the Arctic region, the corrosion resistance of hydraulic threaded cartridge valve needs to be very high. The boss asked him to identify the suppliers and approve the samples within 2 months. Erdmann felt that it could be completed within 20 days. He sent the drawings of hydraulic threaded cartridge valves to the original hydraulic valve manufacturers. Only 2 weeks later, he received samples of hydraulic threaded cartridge valves from one factory. The surface gloss of these samples of hydraulic threaded cartridge valves was quite good. The company tested them on the exploration drilling machine and delivered it quickly to the customer.

3 months later, the customer complained that the hydraulic threaded cartridge valve on the hydraulic pump was seriously corroded, some threads were stuck, the equipment could not be started, and the test run was unsuccessful. The boss thought that Erdmann was careless and ignored the use scene of the Arctic region. The boss again asked him to make new samples and do salt spray test inside the company. Actually, Erdmann emphasized that the hydraulic threaded cartridge valve is to be used in the Arctic region. The original supplier said that their hydraulic threaded cartridge valves have good gloss and corrosion resistance, and can be used in the Arctic region.

Erdmann communicated with the original hydraulic threaded cartridge valve supplier again, and the reply was that most hydraulic valve manufacturers just adopt the zinc plating process, and he used the nickel plating process which is the highest level of corrosion resistance. Erdmann realized the difficulty of corrosion resistance in the Arctic regions. Erdmann emailed more than 20 hydraulic valve manufacturers who had been contacted before, emphasizing that the hydraulic threaded cartridge valve must be in the highly corrosive environment in the Arctic region, and the service life shall not be less than 9 months. Only 3 hydraulic valve manufacturers said they could have a try, but there was no response from other manufacturers. Erdmann was a little flustered.

Erdmann saw AAK hydraulic valve on Google, who supplied to hydraulic pump company in Russia. He felt that AAK might give him a glimmer of hope. He emailed us to ask if we can produce hydraulic threaded cartridge valves to be used in Arctic regions. We directly replied that the components of the valve should be treated by special electroplating process in order to meet the condition in the Arctic regions. After 20 days, AAK sent samples according to his hydraulic threaded cartridge valve drawings. HAWE company conducted salt spray test on samples from all 4 manufacturers, with the corrosion condition twice that of Arctic regions.

More than 2 months later, Erdmann informed us that AAK hydraulic threaded cartridge valve had no red rust after more than 1500 hours of salt spray test. At the same time, the company's engineers determined that AAK hydraulic threaded cartridge valve had no problem to be used in the Arctic regions for 1 year. While the samples from other manufacturers began to produce red rust in more than 120 hours, and there were white corrosion products on the coating surface.

Erdmann hesitated to report to his boss because the quotation of AAK hydraulic threaded cartridge valve is 30% higher than that of other suppliers. The surface electroplating process of AAK hydraulic threaded cartridge valve is zinc nickel alloy coating, which has high requirements for steel heat treatment. It may be difficult to find a second factory in Ningbo who can go through both of these two processes smoothly. In addition, the process cost is more than 5 times higher, but the corrosion resistance is more than 10 times higher than the general zinc plating and nickel plating process. With these data, the communicated between Erdmann with the boss is very efficient. The boss mentioned that for all those valves with high standard and high working conditions, just to choose AAK hydraulic valves.

AAK hydraulic threaded cartridge valve will not corrode in the Arctic regions even after being used for 1 year. Welcome to have a small try!

Brooke is the purchasing manager of the American company Vickers and has been working with AAK for more than 6 years. One morning last month, he emailed us that his job was finally saved. I was surprised how a veteran suddenly said that he had finally "saved his job". In private, I learned that it was because he had some disagreements with his boss and quarreled. The boss almost let him go. Because his boss is not satisfied with the price of AAK, sometimes the price of AAK for the same hydraulic valve will be more than 20% higher than that of other Chinese hydraulic valve manufacturers. At the cost meeting last month, the boss proposed to replace the Chinese hydraulic valve manufacturer, but Brooke insisted that AAK is the most cost-effective Chinese hydraulic valve manufacturer, so it is not recommended to replace it. On the contrary, he can only leave.

The year before last, the boss went to Shanghai PTC exhibition with him to develop suitable Chinese hydraulic valve manufacturers for cooperation. They did get acquainted with many Chinese hydraulic valve manufacturers at the exhibition, but after more than 2 years of testing samples and running in, Brooke found that there is really no second Chinese hydraulic valve manufacturer that can compare with AAK in all aspects. AAK is not only reliable, but also has temperature, whether it is cooperation, delivery, quality, after-sales etc.

Brooke remembers the support and help from AAK hydraulic valve over the years. On one occasion, due to the urgent delivery time of a South African customer, Brooke could not find a factory with stock at that time and could only customize it. Most Chinese hydraulic valve manufacturers said that the lead time from sampling to delivery should be at least 2 months. AAK stopped a production line and asked technicians to work overtime to speed up the production. Samples can be produced in 30 days and shipped in 45 days. It is precisely because of the temperature of AAK that Vickers has the opportunity to cooperate with this big customer in South Africa. Every time, AAK products can be successful at one time during testing. They are the best among all Chinese hydraulic valve manufacturers in terms of accuracy, concentricity, fatigue resistance and durability.

Brooke's deepest memory is that one time, the South African customer mentioned that the hydraulic valve used for more than 2 years often stuck during work and asked for replacement. After receiving the news, AAK immediately told Brooke to ask the customer to return the goods. After inspection, it turned out that the hydraulic oil used by the South African customer was not clean and caused the problem. Later, AAK disassembled and cleaned the valve and sent it again, and asked the customer to change the hydraulic oil. Until now, no problem has been mentioned. If this happened to other Chinese hydraulic valve manufacturers, their reply must be that this has passed the warranty period.

After listening to Brooke's analysis, the boss instantly resonated. It is indeed too difficult to find another Chinese hydraulic valve manufacturer like AAK, who can always put the interests of customers at the first place. Sometimes, even if it is 20% higher, it is still worthy. At the same time, it was made clear at the meeting that AAK would be the first choice for them among Chinese hydraulic valve manufacturers in the future.

AAK is the most reliable hydraulic valve manufacturer in China. It can solve difficulties for customers at any time. Welcome to give it a try!

The opening and closing characteristics can reach 95% opening rate and 90% closing rate, the operating pressure swing is not greater than ± 0.1MPa, and the design service life is more than 1 million times. For this high precision, high stability and high durability 3-high hydraulic threaded cartridge valve, Jacob is surprised that the AAK hydraulic valve is successful in one-time sample, while most hydraulic valve manufacturers are not able to do at all.

Jacob is a purchaser of Intermot company in Italy. The company has a newly developed hydraulic motor, which needs to use hydraulic threaded cartridge valve. This motor is a high-frequency operation and has strict requirements for various parameters, especially for the parameters of hydraulic threaded cartridge valve, which has 3 high requirements of high accuracy, high stability and high durability. The boss asked Jacob to complete the procurement of this batch of hydraulic threaded cartridge valves within 60 days. He selected 4 from the original hydraulic valve suppliers to make samples. After installation, it was found that the opening and closing characteristics of hydraulic threaded cartridge valves can only reach 90% opening rate and 85% closing rate, which is 5% lower than the parameter requirements. Even the operating pressure swing of some hydraulic threaded cartridge valves exceeds 0.2MPa. In the last step testing, only 2 or 3 samples can be intact after 1 million durability tests. If all three requirements should be reached at the same time, nearly none of the samples meet the standard. Due to the limitation of equipment, the original manufacturer said it was difficult to improve significantly. Jacob learned about AAK hydraulic valve under the introduction of its peers. After browsing AAK website (www.aakindustry. com), he felt that the AAK hydraulic threaded cartridge valve might help him.

After receiving the parameter requirements and drawings of his hydraulic threaded cartridge valve, we found that the requirements of this hydraulic threaded cartridge valve are not simple, but our technical team needs to chew this hard bone and gave reply to Jacob that if it goes well, the samples of the hydraulic threaded cartridge valve can be sent within 20 days. On the contrary, it needs more time for proofing. Jacob hopes that AAK hydraulic threaded cartridge valve sample will be successful, which just meets the delivery time required by the boss. After 15 days, AAK sent the hydraulic threaded cartridge valve samples successfully. After installation and test by the engineer, all parameters of the hydraulic threaded cartridge valves are qualified and meet the 3 high requirements of high accuracy, high stability and high durability. After 25 days, the shipment of the hydraulic threaded cartridge valve was delivered as scheduled.

The boss knew a series of frustrations that Jacob encountered during this purchasing, and praised the 3 high standards of AAK hydraulic threaded cartridge valve, not only because the quality of AAK hydraulic valve is reliable, but also because of credit. Jacob wondered why AAK hydraulic valve can achieve a 3-high hydraulic threaded cartridge valve with only one-time sample, while most hydraulic valve manufacturers are helpless.

For the 3-high hydraulic threaded cartridge valve, AAK has Mikron GF machining center imported from Switzerland. It has advanced thermal stability, and the high precision is still stable in the long-time machining process. The Mikron GF unique spindle omnidirectional anti-collision protection technology (MSP) can prevent the spindle from collision failure, and integrate automatic solutions to ensure the stability of precision parts. There are also experienced technicians who have been in our factory for more than 10 years. Sometimes they can judge the production status by listening to the sound of the machine only, and each production link of the hydraulic threaded cartridge valve is engraved in their mind. The craftsman hand will produce good products, which is the strength of AAK. Integrity, sincerity, trust and credit are the way of hydraulic valves that AAK has always adhered to.

AAK hydraulic threaded cartridge valve, strength to speak, sincerity to do things, welcome a small try!

Bauer is a purchaser of American PowerTeam company. In recent years, the purchasing of hydraulic valves has been smooth. Last October, PowerTeam received a test order for a hydraulic power unit from a South African customer. The customer requires to receive the prototype in the shortest time. If the prototype test is normal, there will be a series of orders later. The boss attached great importance to it and asked the technical team to design and develop it. What the engineers are most worried about is that the use frequency of the hydraulic power unit is twice that of the conventional one. Therefore, the durability of the hydraulic threaded cartridge valve used should be at least more than 2 million times.

According to the parameters and working conditions of the hydraulic threaded cartridge valve, Bauer contacted more than 20 new and old hydraulic valve manufacturers. After one-to-one communication, he selected 5 hydraulic valve manufacturers to make samples for testing. 20 days later, Bauer received 6 samples of hydraulic threaded cartridge valves. After the engineers installed and tested, none of the hydraulic threaded cartridge valves could pass the durability test for 2 million times. Bauer had a second round of communication with the manufacturers, 3 of the hydraulic valve manufacturers said they would re-sample the hydraulic threaded cartridge valve. After the second round of testing, although the durability of hydraulic threaded cartridge valves has been improved, they have not reached 2 million times. Bauer was embarrassed. He might have killed the big order. After communicating, the manufacturer advised that there was nothing he could do. Bauer was very worried and had to try his luck with a new hydraulic valve manufacturer. He found AAK hydraulic valve on Google and searched AAK website (www.aakindustry.com). After browsing, Bauer thought that AAK might be able to successfully sample this hydraulic threaded cartridge valve.

After receiving the working condition requirements and drawings of the hydraulic threaded cartridge valve from Bauer, AAK engineer made analysis and determined that they were more than 95% confident to make it successfully. After 2 rounds of testing, the engineer defined the production process of proofing and circled the technical difficulties. After 20 days, AAK sent the samples of the hydraulic threaded cartridge valve. Unexpectedly, 2 months after the samples of hydraulic threaded cartridge valves were sent, we received the official order of 600 hydraulic threaded cartridge valves from Bauer. Bauer said that the equipment commissioning of South African customer was successful and the operation was stable, they were very satisfied with the quality of PowerTeam. The boss was very satisfied that Bauer found such a great hydraulic valve manufacturer and designated AAK as their exclusive supplier of hydraulic threaded cartridge valves.

Bauer also knew why AAK hydraulic threaded cartridge valve can be successful at one time. There are not only professional engineers to design the process, but also self-developed equipment to escort it. Most hydraulic valve manufacturers do not have the equipment for durability test, but many dimensions of this hydraulic threaded cartridge valve are non-standard, so many non-standard calibers of this hydraulic threaded cartridge valve should be tested separately. AAK has the independently developed durability test equipment for hydraulic threaded cartridge valves, which can be combined with NFPA / T2.6.1 standard to carry out fatigue test on valves according to the specified requirements of customers. AAK durability test equipment has 5 test stations that can work independently of each other. Each test area is equipped with hydraulic and electrical sources that are conducive to valve fatigue test, which can greatly improve the detection efficiency of the equipment, so as to ensure that each hydraulic threaded cartridge valve can be shipped after passing the test.

AAK hydraulic threaded cartridge valve, with unique testing equipment to ensure the success of each sample. You are welcome to have a small try!

Richard is a purchaser of ATOS company in Italy. Last September, ATOS received a complaint from a South African customer that the starting pressure of the hydraulic pump was often insufficient recently. The field engineer analyzed that the valve spool spring of the pilot hydraulic relief valve of the hydraulic pump was deformed, resulting in the unstable pressure of the hydraulic system. He tried to replace the pilot hydraulic relief valve to solve the problem. The customer questioned the stability of their equipment because it had been used for less than 1 year. After learning about it, the boss asked Richard to solve the customer complaint as soon as possible and replace this batch of pilot hydraulic relief valves.

Richard wondered about the problem with the pilot hydraulic relief valve. This pilot hydraulic relief valve was produced by an American company and was re purchased this time. The original manufacturer replied that this pilot hydraulic relief valve has been produced according to the standard. The strength limit and elastic limit of the piano steel wire used meet the requirements. The problem should be caused by improper use by the user. Of course, he can not tell the boss of such results. The original manufacturer was unwilling to take responsibility. Richard contacted nearly 20 hydraulic valve manufacturers, including AAK hydraulic valve. After several rounds of communication, Richard eliminated half of the hydraulic valve manufacturers, and then asked the shortlisted hydraulic valve manufacturers to send their own ready-made pilot hydraulic relief valves. Their company conducted spring elasticity test. Finally, 5 manufacturers were selected to send samples for the second round according to the drawing size of his pilot hydraulic relief valve and improve the spring elasticity.

After communicating with Richard, we learned that the service limit pressure of the hydraulic pump is above 350bar and the service frequency is very high. Although the piano wire spring used by Sun, the original American manufacturer, is advanced, special materials must be used for this special working condition. We started to test the special spring first. Richard has received samples of pilot hydraulic relief valves from other 4 factories, but AAK hasn't sent them yet. Richard pushed us several times and we advised that we are still in testing. Richard may think AAK should not be able to do it.

AAK engineers spent 3 weeks, 6 times replacing materials and 9 times proofing, determined the special alloy steel spring as a trial, and sent the pilot hydraulic relief valve 30 days later. We specially asked Richard about the test of the pilot hydraulic relief valves from the other 4 manufacturers. Richard advised that if AAK pilot hydraulic relief valve could not pass the test, he would need a new round of looking for suppliers.

A month later, Richard informed that AAK pilot hydraulic relief valve could still be opened and closed normally after 1 million tests under high stress, with flexible action and no deformation of the spring, while the samples from the other 4 manufacturers began to be unstable after 400,000-600,000 tests. AAK stands out from more than 20 suppliers after 3 rounds of PK. The spring of hydraulic valve is most afraid of fatigue damage，especially under high stress. The spring of AAK pilot hydraulic relief valve adopts SiCr alloy steel. The spring has the characteristics of high temperature resistance, high rigidity, high relaxation resistance and long fatigue life.

Richard is finally relieved. He asked us to provide two more pilot hydraulic relief valves, to replace the pilot hydraulic relief valves produced by the original American manufacturer Sun company, and then start preparing materials for mass production

AAK pilot operated hydraulic relief valve is unconventional and exceeds the conventional goods of Sun company in the United States. You can also have a small try.

AAK hydraulic valve blocks adopt MB Series Plug of KVT company in Switzerland, and forms a solid sealing surface after metal extrusion in the way of expansion bite, 100% avoiding oil seepage and oil leakage of hydraulic valve block, which fundamentally solves the problem of high-pressure plugging of hydraulic valve block, and the rated pressure can be as high as 450bar without pollution. Most hydraulic valve manufacturers fail to seal the hydraulic valve block in place, but AAK has become a long-term cooperative supplier of hydraulic valve block for American customer.

The vast majority of hydraulic valve manufacturers use the traditional sealing method of inner hexagonal (or outer hexagonal) screw plug and sealing combination gasket to process the hydraulic valve block. The service pressure is basically in the range of 50-300bar, and the operation is simple and easy to disassemble. The hidden danger is that there are requirements for tightening torque. If the torque is not reached, it is easy to leak, and if it exceeds, the thread is easy to be damaged, some hydraulic valve manufacturers even apply anaerobic glue on the thread, which is easy to cause particles of anaerobic glue to fall into the hole, resulting in oil pollution or valve jamming of the hydraulic valve.

In addition to the function of hydraulic logic control, some hydraulic valve blocks also need to work for a long time in the environment of high-pressure, high-frequency pressure impact and temperature impact. Therefore, the sealing process of hydraulic valve blocks is very important. Declan, an American customer, is a hydraulic friend of Blake. He recently encountered trouble in purchasing the hydraulic valve block. The approval sample of the hydraulic valve block provided by the original factory showed that the parameters were completely normal in the first test, and there was slight oil seepage in the second test. Declan thought it was something wrong with the hydraulic system. Declan checked and tested the samples for the third time, the hydraulic valve block began to leak oil. After communicated with the original manufacturer, Declan was advised that this sealing process is common in the industry, he should either accept the hydraulic valve block as is or cancel the order.

Declan consulted more than 30 hydraulic valve manufacturers through B2B, Google and other websites. Their hydraulic valve blocks all adopt the general sealing process in the industry, and can not guarantee 100% sealing. After consulting Blake, Blake suggested him contacting AAK and told him that AAK hydraulic valves are not market goods and have some their own R & D processes. Perhaps AAK does not adopt the general sealing process in the industry for the sealing of hydraulic valve blocks.

According to the hydraulic valve block drawings from Declan, we sent out the hydraulic valve block samples a week later. 2 weeks later, Declan informed us that the parameters of AAK hydraulic valve block were fully up to standard after 3 tests.

AAK has introduced new sealing technology and MB Series products of KVT company in Switzerland as early as 5 years ago, which fundamentally solves the problem of high-pressure sealing of hydraulic valve block. This technology has low requirements for process hole, is convenient, fast and flexible for installation, and the rated pressure can reach 450bar. At the same time, it forms a solid sealing surface after intermetallic extrusion by expansion bite, and has no pollution. The hydraulic valve block with strong stability is the personal bodyguard of high-quality hydraulic valves.

AAK hydraulic valve block, is 100% sealed, free of pollution, easy to operate, you can also have a small try!

The angle error of inner cone of AAK hydraulic relief valve sleeve is controlled within ± 0.8 °, and the minimum axial grinding tolerance of sealing circle is 0.075μm. At the same time, it is inspected by three coordinate measuring instrument to ensure that the hydraulic relief valve is 100% leak free. After comparing more than 10 hydraulic valve manufacturers, Backhaus determined that AAK hydraulic valve is the most reliable hydraulic relief valve manufacturer.

At present, in the manufacturing process of hydraulic relief valve, when grinding the conical surface inside the valve, most hydraulic valve manufacturers just let the operator judges the feed rate, angle control and grinding tolerance by experience completely. There is no grinding amount detection link, and there is no precision detection of each part in the valve. When this type of common quality hydraulic relief valve is used on equipment with high requirements, troubles will come out.

Backhaus is a purchaser of a German hydraulic pump company for less than a year. In the first half of the year, a batch of hydraulic pumps of their company were complained by customers. After the hydraulic pump is started, the system pressure begins to lose stability and there is pressure drift. The engineer judged that there was a problem with the hydraulic relief valve. After disassembly, it was found that there was a gap between the valve sleeve and valve spool of the hydraulic relief valve. After measurement, it was found that the error of the cone angle in the valve sleeve of the hydraulic relief valve was too big and caused leakage of the hydraulic relief valve. The only solution is to replace the hydraulic relief valve. It is estimated that 30% of hydraulic relief valves need to be replaced. The boss asked Backhaus to replenish the goods as soon as possible and solve the customer complaints.

Backhaus contacted the original manufacturer of the hydraulic relief valve. The manufacturer was willing to replenish. Backhaus thought it would be all right after replacing the hydraulic relief valve. A month later, the customer complained again, which is still the same problem. This shows that the quality of the hydraulic relief valve from the old manufacturer is not trustworthy, and it is urgent to replace the hydraulic relief valve supplier. Backhaus contacted more than 10 hydraulic relief valve manufacturers, including AAK hydraulic valve. The hydraulic relief valve is required to be 100% leak free. AAK hydraulic valve and other 3 manufacturers are required to send samples for testing according to his hydraulic relief valve drawings and working conditions.

A month later, Backhaus asked us about the production time of replenishing 30% hydraulic relief valve. It should be that AAK hydraulic relief valve has been recognized by the customer. Backhaus frankly told that there was slight leakage on several hydraulic relief valves from the other 3 manufacturers, only AAK hydraulic relief valve had no leakage, and the parameters of AAK hydraulic relief valve were the most stable in the 4 factories. At the same time, their engineers regarded that AAK quality was the most trustworthy.

AAK designs a special CMM detection device according to the structural characteristics of the valve sleeve, which can analyze and control the detection error, so as to reduce the impact of the measurement system error on the measurement accuracy. In the actual manufacturing process, the detection device can quickly measure the relevant dimensions of the inner cone of each valve sleeve, realize the full coverage and accurate control of manufacturing error, and ensure that the final actual manufacturing error of the inner cone angle is controlled with ± 0.8 °, and the minimum axial grinding tolerance of the sealing circle is 0.075μm. Thus, each valve can achieve 100% leakage free.

AAK hydraulic relief valve, is not the market common quality, focused on details, 100% no leakage, you are welcome to give it a try!

Taylor suddenly emailed us to ask if we can deliver 110 hydraulic diverter valves within 20 days? As the purchasing manager of Caterpillar, Taylor has cooperated with AAK for several years, but since the last half year, there has been only inquiry and no actual order. There must be a reason for this urgent hydraulic diverter valve order. Taylor said that the customer complained that their excavator was weak. The hydraulic diverter valves used in the excavator were abnormal. Their engineers found that the valve spool of the hydraulic diverter valve was stuck, so they had to re purchase new hydraulic diverter valves for replacement. The customer asked them to replace these hydraulic diverter valves within 1 month. This time was very tight, and Taylor didn't have any confidence about it at all.

The original manufacturer considered that the residues in the valve were due to the unclean hydraulic oil used, and was unwilling to offer free replacement for the hydraulic diverter valves. He only can accept to produce the hydraulic diverter valves for another new order, but it would take 35 days to complete it. After disassembling the hydraulic diverter valve, the Caterpillar engineer found that there were a few fine metal particles left on the contact surface between the valve spool and the valve sleeve, and no particles were found in the hydraulic oil. These particles were caused by incomplete cleaning of the hydraulic diverter valve after processing, but the original manufacturer still denied it. Taylor had to contact other hydraulic diverter valve manufacturers, including several local factories in the United States. Unfortunately, none of them were able to complete the production of 110 hydraulic diverter valves in 20 days. This is why Taylor emailed to AAK. He regretted to save 20% of the price, resulted in the current embarrassing situation.

We don't know whether we can complete the production of 110 hydraulic diverter valves within 20 days. One day later, we advised Taylor that we are 90% confident that we can complete the production of this batch of hydraulic diverter valves. This hydraulic diverter valve is just very close to another one that we produced for a German company. We still have the stock materials, but only need to adjust the size slightly. This can save some time. After 20 days, the 110 excavator hydraulic diverter valves were successfully delivered, and their company successfully replaced the hydraulic diverter valves. The customer was very satisfied with their after-sales speed, and Taylor was finally relieved.

AAK hydraulic diverter valve strictly controls and tests each production process, especially the cleaning in the valve is clean. We use the ultrasonic cleaning machine imported from Japan, which converts the sound energy of the power ultrasonic frequency source into mechanical vibration through the transducer, and radiates the ultrasonic wave into the cleaning solution in the tank through the cleaning tank wall. Due to the radiation of ultrasonic wave, the microbubbles in the liquid in the tank can keep vibrating under the action of sound wave, destroying the adsorption between dirt and the surface of cleaning parts, causing the fatigue damage of dirt layer and be removed, and scrub the solid surface with the vibration of gas bubbles to achieve 100% cleaning of each part without leaving any residue.

Although AAK hydraulic diverter valve is 20% more expensive, you don't have any worries in use. Taylor also privately told us that after learning about this, his boss suggested not to easily change the hydraulic diverter valve supplier. AAK hydraulic valve is trustworthy.

AAK hydraulic diverter valve, the cleaning inside the valve is absolutely clean and 100% residue free. You are welcome to give it a try!

The email from Draper this morning made me in a good mood all day. I had two bowls of rice at noon. He said that 5 months have passed since AAK supplied the hydraulic needle valves in September last year, they have not received any complaints from users. His boss finally accepted his suggestion: "AAK is the preferred supplier for hydraulic needle valves, even if the price is 20% more expensive". Draper, whom we met in 2019, is a purchasing veteran of Doedijns company in the Netherlands. In 2019, he purchased 3 small batches of hydraulic needle valves from AAK in 3 times. He was very satisfied with the quality and service of AAK hydraulic valves, but in the recent two years of 2020 and 2021, he basically just placed orders for the very difficult and small quantity of hydraulic valves. Draper told the truth privately that he couldn't persuade the boss to place a big order with AAK. The problem is the price. Sometimes the price of AAK hydraulic valves is 20% higher than that of other manufacturers. Only the orders that are out of the capacity other hydraulic valve manufacturers will be placed with AAK.

Last July, Draper sent us an email with the subject of "the production time of 1200 hydraulic needle valves". Because he had never sent an inquiry for such a big quantity of hydraulic needle valves, I thought that he sent the email to us by mistake. After communication, it was learned that he finally persuaded the boss to place big order with AAK even if the hydraulic needle valve is 20% more expensive, because they don't want to waste time on the after-sales for the hydraulic needle valves.

In the past 2 years, customers have complained more and more about the hydraulic needle valves purchased by Draper. The complaints are basically about some small details of the hydraulic needle valves. For example, the hidden burr of the hydraulic needle valves in the hydraulic power system is not completely cleaned, which affects the matching accuracy and assembly of various parts in the system, as well as the tightness of the matching interface, resulting in internal leakage. Some hydraulic needle valves are complained by users after being used for even only 3 months. For many times, they needed to replace the hydraulic needle valves for users with new ones, which wasted too much of time due to after-sales and also interrupted the construction progress of users. The 1200 hydraulic needle valves purchased from AAK this time are the repeat order for their old customer. The customer said that they will not accept the repair of hydraulic power equipment within 6 months for any reason. Draper once again suggested the boss purchase the hydraulic needle valves from AAK, because in the past 3 years, there has never been any abnormal quality of any hydraulic valves purchased from AAK within 12 months. After comparing more than 20 hydraulic valve manufacturers, AAK is his most trusted hydraulic valve manufacturer. Perhaps his boss also knows that AAK hydraulic needle valve has never been complained. Although the pre-sales cost from AAK is 20% more, sometimes the after-sales cost of hydraulic needle valves purchased from other hydraulic valve manufacturers may exceed 20%. The boss finally agreed with Draper’s opinion. This time, the large order of hydraulic needle valves will be placed with AAK even if the price is 20% more expensive. Also, in the future, AAK will be the first choice for their hydraulic valves.

The reason why Draper is not worried about the burr of AAK hydraulic needle valves is that he knows that AAK has the unique burr removal process that most other hydraulic valve manufacturers can't do. Firstly, the accurate position of the burr is determined, and the burr is removed by high-pressure solution jet. Then, there is one more step to re-check the residual burr that the other peers will not do. The burr part is rechecked by endoscope C50. If there are still residual burr, clean it again and recheck it again until it is completely eliminated. This is a detail awareness lacked by other hydraulic valve manufacturers, and also the reason why AAK can achieve 100% free of burrs. AAK endoscope equipment uses the number of CCD pixels and optical fiber conduction to automatically adjust the brightness during detection. It performs 360 degree detection on each hole in the valve body and clearly grabs each hidden burr, so as to ensure that each hydraulic needle valve is 100% free of burr residue.

AAK hydraulic needle valve is unique in detail inspection. Welcome to have a small try!

Last week, Eddy emailed me that after AAK hydraulic check valves of the test order has been used for 3 months , the O-ring seal was still free of wear. He was finally relieved. Eddy, who works at Terex company in the United States, has successfully purchased hydraulic valves from China over the years, and his boss is also very satisfied. At the beginning of last year, a customer complained about the hydraulic equipment supplied by their company for offshore oil field exploitation, which made him very passive. Some equipment has the phenomenon that the drilling machine rises slowly or cannot rise. Their engineer found that the hydraulic check valves used in the oil circuit of the hydraulic equipment had internal leakage, the one-way oil circuit could not be fully locked, resulting in the inability of the equipment to rise. Their engineer can only replace the hydraulic check valves with the previous spare ones and bring the problematic hydraulic check valves back to the company. Eddy sent these hydraulic check valves to the original supplier. The supplier replied that the reason for the leakage in the hydraulic check valves was that the ambient temperature was too low. The O-ring seal of the hydraulic check valves was hardened and worn quickly in extremely cold conditions, which was difficult to solve. Eddy knows that if he can't give reply to customer like this, he must find a manufacturer who is able to produce the hydraulic check valves working at low temperature. Eddy contacted several hydraulic check valve manufacturers, most of them reported that it was difficult to achieve 100% leakage free under such extremely cold conditions. Eddy was worried.

When Eddy contacted us, our engineer wanted to see the real reason for the wear of the O-ring of his hydraulic check valves and asked him to send the defective hydraulic check valves. After receiving the samples, our engineer realized that even if the cold resistant O-ring is used, it may not be 100% leak free, and the structure of the sealing ring needs to be changed, because the internal structure of this hydraulic check valve is a little complex. Eddy said that this is the only different reply he received. It seems that Eddy still doesn't believe that AAK can solve the leakage problem of the hydraulic check valves.

I told him that a Russian customer has purchased hydraulic relief valves from us, and their hydraulic equipment is also used in oil fields. The customer told us that under extremely cold conditions, the service life of AAK hydraulic relief valve is more than 4 times that of its peers. Three weeks later, we sent 4 pieces of hydraulic check valves of the test order to Eddy. There was no news after 3 months. Until last week, we received email from Eddy amazing that their engineers also admired our idea of adding retaining ring to the O-ring of the hydraulic check valves.

I told Eddy that the installation of retaining ring can play the role of axial fixation, reduce the gap between the O-ring and the low-pressure side of the seal, and prevent the O-ring from being 'extruded'. At the same time, the structure of O-ring added with retaining ring will bear much greater pressure than when the O-ring is used alone, which reduces the wear of the O-ring. Moreover, AAK uses PTFE retaining rings that can withstand extremely low temperature and can be used for almost all media without hardening and damage. The most important thing is that AAK engineers can design and manufacture with strict tolerance according to the working conditions of their hydraulic check valves. That is, not only the material is good, but also the structure needs to be matched, but also the strict tolerance manufacturing during processing.

In the hydraulic check valves, the quality of every part is related to the durability of the whole valve, including the small retaining ring. AAK can design and customize the hydraulic check valves according to the actual working conditions of customers. The hydraulic check valves with PTFE retaining ring can be used in extremely cold areas and ensure durability.

AAK hydraulic check valves, has unique tips on designing the retaining ring, welcome to have a small try!

Walt placed an order for 1000 hydraulic threaded cartridge valves at one time last week, which surprised me. Three years ago, I met Walt from an American company at the Shanghai PTC exhibition. He communicated with us at our booth for more than half an hour. After the exhibition, Walt sent an email saying that his company happened to have a newly developed hydraulic equipment, which needs to use hydraulic threaded cartridge valves. He asked AAK to urgently provide 30 samples of hydraulic threaded cartridge valves according to his drawings. AAK sent out 30 hydraulic threaded cartridge valves after 25 days. After this, there was no inquiry for any hydraulic threaded cartridge valves from him. Half a year later, Walt sent a new test order of 40pcs for another new hydraulic threaded cartridge valve. Same as last time, there is no further news after delivery. In this way, we just received 2 test orders in about 2 years.

I thought that there should be a mistake on the quantity of this large order of hydraulic threaded cartridge valve this time. After several rounds of emails, we know the story for this hydraulic threaded cartridge valve. Their company has only begun to purchase hydraulic valves from China in recent 3 years. For the hydraulic threaded cartridge valves purchased at the beginning, there are always complaints from customers after a period of time, such as leakage or jamming, insensitive opening and closing or serious wear and tear, etc. In the past 2 years, Walt also tried samples from more than 20 hydraulic valve manufacturers. The same problems still occur after each replacement. Only AAK hydraulic threaded cartridge valves have not received a complaint.

Walt compared more than 20 suppliers for 2 years, and only AAK hydraulic threaded cartridge valves had no complaints. This time, he strongly suggested his boss that the future hydraulic threaded cartridge valves can only be purchased from AAK. His boss also wants to know why AAK can ensure that there are no complaints about the hydraulic threaded cartridge valves.

AAK hydraulic valve not only has the CNC machining center imported from Switzerland, but also has its own upgraded and refitted independent fixtures, which eliminates man-made errors. At the same time, we have accurately controlled every detail of the processing, production, assembly, inspection and packaging of each hydraulic threaded cartridge valve, which has surpassed the vast majority of domestic peers.

Firstly, AAK will divide the installed products into several assembly units according to the structure and process characteristics of the hydraulic valve, reduce the single parts entering the general assembly as much as possible, and ensure the reasonable assembly sequence and specified assembly accuracy of the hydraulic valve. All parts will be accurately measured, strictly inspected and tested before and after the general assembly of the hydraulic threaded cartridge valve.

Secondly, AAK adopts the matching method for assembly, which will divide the parts into several groups according to the strict size range, and then assemble the corresponding matching parts together to achieve the required assembly accuracy.

Finally, after assembly, check whether there is surplus or lack of parts, whether each connecting part is loose and skewed, and whether the residue of sealing belt on cone plug is removed. At the same time, test each hydraulic threaded cartridge valve, including leakage, flexibility, opening and closing performance, etc.

AAK hydraulic threaded cartridge valve is free of complaint. Welcome to have a small try!

At the beginning of last year, LIEBHERR customized a high-power and high-pressure excavator for their customer. 6 months later, customer complained about oil leakage. After testing, the engineer found that there was no problem with the hydraulic relief valve. The leakage was concentrated in the auxiliary valve, so it was locked as a sealing problem. After disassembling the hydraulic relief valve, it was found that it was caused by the serious wear of the sealing ring. David was responsible for the purchase of hydraulic valves. After he contacted the original factory of hydraulic relief valve, the manufacturer soon sent a new sealing ring. However, a similar situation occurred again in 2 months, and the sealing ring of hydraulic relief valve was replaced for 3 consecutive cycles. The customer was very dissatisfied with this after-sales service and complained directly to the headquarters. The boss asked David to come up with a thorough solution as soon as possible.

David was also surprised why the sealing ring of the hydraulic relief valve had to be replaced in 2 months. The manufacturer informed that the pressure and limit temperature of this equipment are very special, especially for high-frequency operation. The service life of the sealing ring of the hydraulic relief valve can only be guaranteed in 2 months, it has to be replaced every 2 months, no other solution. David contacted many other hydraulic valve manufacturers, most of them said that they could only replace the sealing ring every 2 months, and some also suggested changing the whole hydraulic system assembly of the excavator. After 1 year, David hasn't come up with a new plan yet. The customer is unhappy and the boss keeps pushing him.

David browsed AAK website and asked directly by email whether AAK has tips on the sealing ring of hydraulic relief valve or not. After receiving the drawings and working conditions of the hydraulic relief valve from David, we found that the pressure of the hydraulic relief valve is 550bar, the limit temperature is 180 ℃, and it has very high-frequency operation. Even the high temperature resistant fluororubber sealing ring is not suitable for this hydraulic relief valve.

After 3 days of thinking, AAK technical team jumped out of the dead end of thinking about the material of the sealing ring. Can we redesign the structure between the sealing ring and the valve? After the test, it was found that adding "Glyd-ring" may solve the sealing problem of the hydraulic relief valve. David asked us to design and make samples of the hydraulic relief valve installed with Glyd-ring as soon as possible. After 30 days, their engineer installed AAK hydraulic relief valve for customer. 2 months later, the customer didn't call to complain. David felt that AAK might have solved the sealing problem of the hydraulic relief valve that had plagued them for more than a year. 6 months later, there was still no leakage. David was relieved finally. The customer recognized this solution, and the boss was also very happy. In particular, their engineers appreciated AAK design ability and quality.

AAK newly designed hydraulic relief valve is to open a small groove in the contact section between the valve spool and the valve sleeve to install the dynamic seal of Glyd-ring. Most peers can't think of such installation. Even if they think of it, there may be few factories who can operate the process. Such a sealing system can ensure high-frequency friction. The material has stable performance, the pressure resistance range can be below 600bar, and the temperature range is - 30 ℃ - + 200 ℃. Through the dynamic deformation of the sealing ring, it can ensure 100% sealing and prevent the pressureless liquid leakage.

The sealing of AAK hydraulic relief valve, may be thought of by peers, but it may not be possible to do so. There are wonderful tricks in seal design. Welcome to give it a try!

AAK hydraulic pilot operated relief valve adopts diamond reamer technology, and the valve hole accuracy of hydraulic relief valve is guaranteed to be within 3μm, the surface roughness reaches Ra0.2-0.4. AAK hydraulic relief valve is sensitive and the valve spool is not stuck. It exceeds 99% of its peers. Nick, who has cooperated for 6 years, still orders back from AAK.

Nick is the buyer of John Deere company. He has cooperated with AAK hydraulic valve for more than 6 years. The boss trusts him very much. Recently, a batch of bulldozers they sold to South Africa were complained that the hydraulic system was unable to start. The problem was that the valve body hole roundness of the hydraulic pilot operated relief valve was poor and the valve spool was easy to get stuck. The boss felt very strange. In the past 6 years of cooperation with AAK hydraulic valve, there was no complaint about the hydraulic pilot operated relief valve. After checking, he knew that Nick found a new supplier for this hydraulic pilot operated relief valve, which is 17% cheaper than AAK. The approval samples of hydraulic relief valve provided by the hydraulic valve manufacturer are qualified. Unexpectedly, the accuracy of hydraulic relief valve shipment is uneven. The boss asked Nick to contact AAK hydraulic valve, reproduce the hydraulic relief valves, and ship them directly to South Africa.

We were a little surprised when we received an email from Nick to purchase 100 hydraulic relief valves and ship them directly to South Africa. Nick frankly told us that there were problems with the shipments from the original hydraulic relief valve manufacturer and needed the help of AAK to solve the customer complaints together. The difficulty of customer is the difficulty of AAK. We give priority to the production of this batch of hydraulic relief valves. After 35 days, the South African customer of Nick received the replacement of hydraulic pilot operated relief valves, and the whole after-sales process satisfied the customer.

Nick sent an inquiry for a new hydraulic relief valve a few days ago. He specially said that his boss asked him to take AAK as the first choice for future hydraulic relief valves, because the quality of AAK hydraulic relief valve has not had any quality complaints in the past 6 years. Comparing the hydraulic relief valves produced by AAK with its peers, it will show why AAK hydraulic relief valve is sensitive and the valve spool is not stuck, which exceeds 99% of its peers. Nick, who has cooperated for 6 years, still orders back from AAK.

For the machining of hydraulic relief valve hole, most peers use rigid Boring Reamer or stepped reamer, which has high production efficiency, but the hole accuracy is generally 7μm or above, it is difficult to stabilize on one data, and the roughness is fluctuated at the range of Ra1.6-3.2. AAK uses the diamond reamer to process the valve hole of hydraulic relief valve. In the grinding process, the reamer moves regularly in circumference and axis, and the metal is cut completely without trace with the micro edge of diamond particles. The accuracy of the valve hole of the hydraulic relief valve is guaranteed to be within 3μm, the surface roughness reaches Ra0.2-0.4, which almost avoids the roundness and cylindricity errors of the valve hole, improves the coaxial accuracy, and unifies the accuracy data. AAK hydraulic relief valve is sensitive, and the valve spool is not stuck, exceeding 99%.

The 17% more expensive AAK hydraulic relief valve, has its unique valve hole processing, incomparable quality. You are welcome to have a small try.

William is a purchaser of a hydraulic equipment company in the United States. At the beginning of last year, a South American customer wanted to customize a drilling machine for geological exploration. The South American customer promised to order this equipment for a long time if it has excellent performance and stability. The boss asked the engineers to design and test samples. According to the working conditions, the maximum pressure of the hydraulic system is 450bar or above, which has a very high requirement on the pressure resistance and stability of the hydraulic pilot operated pressure control valves.

When William received the task of purchasing this hydraulic pilot operated pressure control valve, he felt a big pressure, because the pressure resistance of normal hydraulic pilot operated pressure control valve is basically 250bar, and the maximum pressure resistance provided by previous hydraulic valve manufacturers was also only 380bar. He asked all the hydraulic valve manufacturers that he contacted before, they basically replied that according to this working condition, their hydraulic pilot operated pressure control valve can only ensure a service life of 3 months, but the customer asked for a service life of 1 year.

William also contacted the local hydraulic valve manufacturers in the United States. They told him that he could not promise a service life of 1 year for this hydraulic pilot operated pressure control valve. They can only test the samples first, then to know the service life. One of his other hydraulic valve manufacturers in China introduced AAK to him. He told William that AAK shipped a hydraulic pilot operated pressure control valve for a working condition of maximum pressure 450bar before, but the service life required by that customer is 6 months.

After receiving the drawings of the hydraulic pilot operated pressure control valve from William, AAK technical team found that the requirements of this hydraulic pilot operated pressure control valve were higher than those of our last shipment. The conventional No. 45 steel could not meet the requirements, so we had to find special steel. Later, after 5 times of material selection and testing, 2 months later, AAK internal sample testing was successful by using a German steel with high wear resistance and high fatigue resistance. After sending the samples of hydraulic pilot operated pressure control valve, we have been waiting for news from William. William said that no news from customer is the best news.

Last month, 1 year after AAK samples were sent, William emailed us that he would order 100 hydraulic pilot operated pressure control valves at one time. The quality standard is the same as that of the hydraulic pilot operated pressure control valves sent last year. Because the other hydraulic valve manufacturers in China can only ensure the service life of 3 months, he did not request those manufacturers to make samples, but only asked a hydraulic valve manufacturer in the United States and AAK hydraulic valve to make samples for this hydraulic pilot operated pressure control valve at the same time.

The test result from their customer is that the samples of hydraulic pilot operated pressure control valves provided by the hydraulic valve manufacturer in the United States needed to be treated after being used for 12 months, while the condition of AAK sample is still normal after 1 year. Therefore, they choose AAK as the supplier for this hydraulic pilot operated pressure control valve and think it is difficult to find a second one

The core of this hydraulic pilot operated pressure control valve is material and heat treatment. AAK adopts 20CrNi2MoV high carburizing bearing steel imported from Germany, combined with carburizing pretreatment process, through secondary quenching + cryogenic treatment + low temperature tempering process, which is cooled to 650 ~ 700 ℃ and discharged after cooling to 450 ~ 500 ℃. The micro hardness is 237 ~ 247 HV, and its wear resistance and contact fatigue performance are increased by more than 3 times.

AAK customized hydraulic pilot operated pressure control valve, is suitable for high pressure working condition and durable, welcome to have a small try!

Vasiliev is a purchaser from an oil field production company in Russia. Although he has not been in office for a long time, his purchasing is very smooth. Early last year, he purchased a batch of hydraulic relief valves for the hydraulic system of drilling rigs for oil exploration in Alaska. The testing on the hydraulic relief valve sample from the original supplier was smooth, but the drilling machine was unable to start after working for about 3 months. It was judged on site that the hydraulic relief valve in the equipment was leaking. After further disassembling the hydraulic relief valve, it was found that the O-ring in the hydraulic relief valve was worn and broken.

Vasiliev contacted the original hydraulic valve manufacturer. The manufacturer replied that the standard nitrile rubber (NBR) O-ring used for this hydraulic relief valve has a service life of at least more than 1 year. He asked Vasiliev to check the temperature of the working environment. When he learned that it was extremely cold at - 50 ℃, the manufacturer said that the sealing ring of the hydraulic relief valve can only be replaced once every 3 months, and there is no other alternative sealing ring. Vasiliev was helpless and had to replace the sealing ring of the hydraulic relief valve to maintain the start-up. Two months after the new O-ring was installed, the hydraulic relief valve leaked again. The engineer complained that the hydraulic relief valve purchased by Vasiliev was too unreliable.

Vasiliev has to find new suppliers. He contacted with more than 30 hydraulic valve manufacturers, including we AAK hydraulic valve. Nearly all manufacturers replied that under the extremely cold condition of - 50 ℃, it is normal for sealing ring to have a service life of only 2-3 months. Only a few hydraulic valve manufacturers are willing to test new materials, but the lead time is to be determined. After receiving the email, AAK just asked about the quantity and delivery date, and told Vasiliev that our product quality can be guaranteed for 1 year under the extremely cold condition of - 50 ℃.

Vasiliev may have realized the AAK hydraulic valve is some different, and asked about 4 why and 3 how in a short email. We replied that there is no need to make sample for this hydraulic relief valve, because we produced a hydraulic relief valve for a North American customer that was used under similar working conditions the year before last. It has been used for more than 1 year and there was no complaint about the leakage of the hydraulic relief valve. Vasiliev was still rather in doubt about this, but he had no other choice except to try AAK hydraulic relief valve, because other hydraulic valve manufacturers either gave up or can not determine the lead time. After 30 days, AAK delivered the hydraulic relief valve as scheduled. After the test was normal, the original hydraulic relief valve was replaced.

6 months later, we asked Vasiliev whether the customer complained about the abnormal hydraulic relief valve. Vasiliev said that AAK hydraulic relief valve was in normal use. His boss was surprised that AAK had done something that more than 30 other hydraulic valve manufacturers could not do. Now the new project is to be developed, and the boss requested that the hydraulic relief valve should be purchased from AAK.

AAK hydraulic relief valve uses ZnO / MAA reinforced hydrogenated nitrile rubber (HNBR) O-ring.

The high temperature resistance of this O-ring is 130 ~ 180 ℃, and the cold resistance is - 55 ~ - 38 ℃. Compared with the ordinary nitrile butadiene rubber ring, silicon rubber, fluororubber, Polytetrachloroethylene O-ring, it has better performance on cold resistance and radiation resistance, is more suitable for extreme cold environment, and can greatly improve the service life of O-ring. AAK hydraulic relief valve with specially treated hydrogenated nitrile rubber (HNBR) O-ring can still be used for more than 1 year even under the extremely cold condition of - 55 ℃, and this Russian client don't want to find a second hydraulic relief valve supplier any more.

AAK hydraulic relief valve has a service life of at least 1 year under extremely cold conditions of - 55 ℃. Welcome to have a small try!

Compared among 20 hydraulic relief valve manufacturers, none of them is able to do the hydraulic relief valve with 2 million times of durability. AAK hydraulic valve finally achieved it after 3 times of sampling. Friedlich worked in polar company for 4 years and was promoted and raised for the first time.

At the beginning of last year, Polar company wanted to develop a new paper cutter. It is expected that the production efficiency will be increased by 50% on the original basis, and the hydraulic relief valve in the hydraulic system is the key, especially the durability of the hydraulic relief valve is required to be 2 million times. The durability of the hydraulic relief valve they previously purchased is basically about 1.2 million times.

Friedlich was assigned to purchase this hydraulic relief valve. He realized that this is a challenge and also an opportunity to improve himself. First, he issued proofing requirements to the original hydraulic relief valve manufacturers, asked them to redesign a new production process for the hydraulic relief valve and make samples for testing. After 20 days, Friedlich received samples of hydraulic relief valves from 3 manufacturers. After 1.5 million times, the valve spool or valve body of the hydraulic relief valve was worn one after another, and none of the manufacturers was successful. Friedlich asked the manufacturer with the best durability to make new samples. The manufacturer advised that this is the best durability that he can achieve at present. If a better sample is needed, it takes time to study and try. Friedlich had to find a new hydraulic relief valve supplier. He contacted more than 20 hydraulic valve manufacturers successively. Some had no reply, and some were willing to make a sample for the durability test of hydraulic relief valve.

At that time, when AAK received the drawings and working condition requirements from Friedlich, our engineers were also not sure at the beginning, because the durability test of the hydraulic relief valve was more than 2 million times, which has a very high requirement for the material selection. With the efforts of more than 2 months, after the selection, comparison, test to the steel materials and 3 times of sampling, the new production process of hydraulic relief valve was determined. Friedlich received the sample of AAK hydraulic relief valve and conducted the durability test. 2 weeks later, Friedlich asked about the production time of 420 hydraulic relief valves and informed that although AAK was the last one among more than 20 hydraulic valve manufacturers to provide samples of hydraulic relief valves, it was also the only one to pass 2 million durability tests.

Last week, almost half a year after these hydraulic relief valves were shipped, Friedlich thanked AAK by email that their paper cutter was equipped with the hydraulic relief valve provided by AAK, it has no any quality complaint and is now selling well. The boss is very satisfied with his purchasing performance. He has worked for 4 years and is now promoted to purchasing manager.

He wants to know why only AAK hydraulic relief valve has such good durability. AAK selects 3Cr3Mo3W2V hot working die steel, which can withstand huge mechanical stress in work. It not only has high hardness, strength, wear resistance and toughness, but also has good high-temperature strength, thermal fatigue stability, thermal conductivity and corrosion resistance. At the same time, its high hardenability ensures that the whole section has consistent mechanical properties. Thus, the hydraulic relief valve is protected from erosion during the operation of the hydraulic system, so as to ensure its durability.

AAK hydraulic relief valve, the material is selected, designed and produced according to the needs of customers, you are welcome to try a small order!

Andrew is the purchasing director of VIS Hydraulics in Italy and an old friend of AAK. He has cooperated with AAK for more than 4 years. One morning in October, I received an email from Andrew with the subject of "a big trouble". It is the first time that I received such an emotional email from Andrew. After reading, it turned out that the pressure of a hydraulic power system of their company was not enough, and the customer complained. The root of the problem is that the hydraulic threaded cartridge valve and hydraulic valve block does not match each other. The boss asked him to solve the problem within a month.

After communication, it was learned that the hydraulic threaded cartridge valve and the hydraulic valve block purchased by Andrew were not produced by the same manufacturer. Now both manufacturers do not admit that it was their own problem. The hydraulic threaded cartridge valve manufacturer said that the pressure of the hydraulic system was slow due to the processing accuracy of the hydraulic valve block, while the hydraulic valve block manufacturer said that the hydraulic threaded cartridge valve had leakage, resulting in insufficient flow. Andrew failed to communicate for several times and thought of AAK. During so many years of cooperation, only AAK hydraulic valve has no complaint. He hopes that AAK can help him find out what the problem is.

Andrew sent us the design drawings of the hydraulic threaded cartridge valve and hydraulic valve block. After analysis, AAK engineers found that the probability is that the design of the hydraulic valve block is unreasonable, the flow area of the through hole designed is not enough, and the direction and position of the oil inlet and outlet are not optimal, resulting in insufficient pressure of the whole hydraulic system. Andrew asked the hydraulic valve block manufacturer to design and produce, but the manufacturer needs 2 months to complete it, while the time given by his boss is only 1 month. Andrew asked the fastest time that AAK can finish the hydraulic valve block.

Our engineers are worried that there may be deviation if design the hydraulic valve block alone. If combined with the mapping of the valve, we can achieve 100% of the optimal design scheme. We recommended Andrew to send us the hydraulic threaded cartridge valve, too. After receiving it, the scanning analysis was carried out, and the design scheme was obtained 2 days later. After 20 days, the redesigned hydraulic valve block was sent to Andrew. After installation and commissioning, the pressure of the hydraulic system was normal. After the complaint was resolved, the boss was also happy and asked Andrew to purchase both the hydraulic threaded cartridge valve and hydraulic valve block from AAK in the future. Don't purchase them separately any more.

AAK engineers use professional automation studio version 7.0 software to automatically generate simulated hydraulic valve block of the threaded cartridge valve, scan and identify the external structure of each threaded cartridge valve, which can directly drag and generate 2D schematic diagram and 3D manifold design drawing in the most intuitive, fastest and simplest way, and then automatically generate the production drawing of hydraulic valve block through the created 2D diagram, with effective and accurate layout of each channel design. The generated data can be directly imported into the CNC machining center system. Compared with the normal design, it can effectively shorten the modification cycle, demonstrate with higher quality and improve the production process, so as to realize the high-efficiency design and processing of hydraulic valve block.

AAK hydraulic valve block is designed by using advanced 3D simulation design software. It can be designed and processed easily. Welcome to have a small try!

Malcolm is a purchaser from an American hydraulic equipment manufacturer. He has purchased various hydraulic valves from AAK for some years. We know each other very well. At the beginning of the year before last, their company received an urgent order from a customer in South America. The company required that the accessories of the whole hydraulic system must be in place within 20 days. AAK is their long-term supplier of hydraulic valve blocks. Malcolm estimates that if the hydraulic valve blocks are purchased from AAK this time, including the transportation and customs clearance time, it will be over 20 days. AAK is only required to offer the quotation according to the hydraulic valve block drawings for their file and is informed that due to time constraints, they will first purchase the hydraulic valve blocks from the local hydraulic valve manufacturer this time.

About 8 months after our quotation, Malcolm asked by email about what is the reason for the leakage of the hydraulic valve blocks. I asked jokingly if leakage happened in the hydraulic valve blocks purchased locally last time. He said that the customer initially complained that about 30% of the hydraulic valve blocks were leaking. The local manufacturer also replaced the bad hydraulic valve blocks with new ones. However, 3-4 months after installation, the customer reported that there was leakage fault of the hydraulic valve blocks again. Now the customer is not satisfied with the stability of the hydraulic valve blocks and needs the leakage problem of the hydraulic valve blocks solved at one time. The trouble is that the local hydraulic valve manufacturer in the United States does not cooperate to replace the hydraulic valve blocks again.

We replied that if we simply look at the leakage cause of the hydraulic valve block, the probability is that the surface roughness of the hydraulic valve block is not up to standard, or the roughness Ra value of the hydraulic valve block is unstable. According to the requirements of these working conditions of your hydraulic equipment, if the Ra value is stable at 0.4um, the problem of hydraulic valve block leakage will not occur.

10 days later, AAK sent 12 samples of hydraulic valve blocks for emergency first. After 20 days, the remaining 30% of the hydraulic valve block was sent from AAK. Now, 12 months have passed, and no complaint from customer. Malcolm mentioned 2 days ago that the customer was ready to place an order again. This time, his boss said that no matter how urgent it was, it was necessary to purchase from AAK, because AAK hydraulic valve block was the most trustworthy, and the boss would communicate with the customer about the delivery date.

Why can AAK achieve the surface roughness Ra value of hydraulic valve block to 0.4um?

First of all, the Ra value of the hydraulic valve is the cornerstone. The coarser the surface, the easier it is to wear. The intermediate gap gradually increases during use, which ultimately affects the sealing effect of the hydraulic valve block and the service life of the hydraulic system. Secondly, a small Ra value is the key and the focus of operation. After processing the hydraulic valve block, AAK will focus on the detection of Ra value and use TYLYROND® 500 Pro Series ultra-high precision profile measuring instrument, the most high-end in the world, from British Taylor Hopson company, ensure the measurement accuracy and stability of Ra value more than similar instruments. The Talym sensor, has an industry leading measurement range of 4mm, and the measurement resolution is 16nm-0.3nm, which can measure in any attitude, whether horizontal or vertical, and the measuring force remains unchanged. Thus, the surface roughness of each hydraulic valve block can be accurately, stably and efficiently tested.

AAK hydraulic valve block, is ingeniously operated and processed, tested by high-end testing equipment. Our American customer has replaced his local original manufacturer in the United States with AAK. You can also have a small try!

When back from the Spring Festival, we received a reorder for 120 hydraulic threaded cartridge valves from Echerle company. Dean has been engaged in hydraulic parts purchasing in Echerle company for many years, and has been doing very well. The boss also trusts him. At the beginning of last year, the company developed a new hydraulic power unit, which has high requirements for the accuracy of the hydraulic threaded cartridge valve to be used. Because of the high accuracy requirement, the original hydraulic threaded cartridge valve manufacturer said that he was not able to achieve it. Dean used a new hydraulic threaded cartridge valve manufacturer finally. After their hydraulic power unit equipment has been sold for just less than 3 months, the customer complained about insufficient power supply. Their engineers believe that the hydraulic threaded cartridge valve was stuck and caused the problem. However, the hydraulic threaded cartridge valve manufacturer believes that it is caused by the uncleanness of hydraulic oil, but the engineer detected that the hydraulic oil is normal.

The boss was not satisfied with such a hydraulic threaded cartridge valve manufacturer and asked dean to find a new hydraulic valve manufacturer and replenish goods as soon as possible. Dean left a message on AAK website and asked, what are the reasons for the stuck of the hydraulic threaded cartridge valve? We estimated that he had encountered the complaint about the stuck of hydraulic threaded cartridge valve. After communication, we learned that he was cheated by the new hydraulic valve manufacturer.

According to the hydraulic threaded cartridge valve drawings sent by him, the accuracy requirements are high, especially the dimensional accuracy requirement of the valve hole is IT7 ~ 4. Among the hydraulic valve manufacturers in Ningbo, there may be no more than 3 factories that are able to meet it. We suggested Dean send the abnormal hydraulic threaded cartridge valve to us. After receiving and disassembling the sample, it was found that the cylindricity and coaxiality of the valve hole of the hydraulic threaded cartridge valve had errors, that is, the accuracy was not enough, the pressure in the matching gap between the valve hole and the valve spool is not balanced, resulting in the limited flexibility and easy stagnation of the valve spool in the valve body.

Dean asked whether we can produce hydraulic threaded cartridge valves meeting valve hole accuracy requirements of IT7 ~ 4? We told Dean that for the hydraulic threaded cartridge valve, the valve hole accuracy is the key point and also the difficulty of quality control process. It directly affects the working performance, service life and stability of the hydraulic threaded cartridge valve. General hydraulic valve manufacturers surrender to this accuracy. AAK has a precision honing machine imported from the United States, which guarantees the finishing of the valve hole of the hydraulic thread cartridge valve, and has the special machine operated by a specially assigned person. After honing, the dimensional accuracy of the valve hole of the hydraulic threaded cartridge valve is IT7 ~ 4, and the surface roughness can reach Ra0.32 ~ 0.04 microns.

Dean first placed a test order of 10 hydraulic threaded cartridge valves to solve customer complaints. After 30 days, Dean informed us by email that their engineer was very satisfied with all the data detected from AAK hydraulic threaded cartridge valve, especially the accuracy of valve hole. After installing AAK hydraulic threaded cartridge valve, the hydraulic power unit restored. If there is no any problem after being used for 3 months, they will place another order for 120 hydraulic threaded cartridge valves.

AAK hydraulic threaded cartridge valve, the valve hole accuracy is praised by the customer's engineers, and you can also give it a try.

In the Spring Festival, I received a confirmed price for a large quantity of hydraulic check valves from Stephen. The contact between Stephen and I is only 2-3 times in the whole last year. It was noted at the end of the email that he needs me to contact him as soon as possible to discuss this hydraulic check valve. Stephen comes from American CASE company. We met the year before last. After communication, it was learned that at the beginning of last year, a bulldozer of their company needed to use hydraulic check valve, the one that AAK had made samples at the beginning. Because the price of AAK hydraulic check valve was 20% higher than that of his original supplier, Stephen did not choose to purchase hydraulic check valve from AAK. Some time ago, the customer complained that the hydraulic pump was damaged due to the sudden increase of hydraulic system pressure.

Stephen communicated with the original hydraulic check valve manufacturer and the manufacturer replaced the hydraulic check valve with a new one, but 3 months later, the same problem came again. The customer was very dissatisfied that this delayed the construction and needed the problem solved at one time. Stephen went back to AAK and asked about the price of the hydraulic check valve. He needed us to maintain the quotation offered last year. I asked Stephen why he went back to AAK to purchase the hydraulic check valve. He told that since the first complaint from the customer, their engineers retested the original hydraulic check valve samples. The hardness of AAK sample was the highest, and the material hardness of each part of the hydraulic check valve was no less than HRC65.

I know why their hydraulic check valve went on strike in 3 months. When we made the sample, we knew that the working pressure was more than 450bar, which was a challenge for the hydraulic check valve. The material hardness of each part of the hydraulic check valve is required to reach more than HRC65. There may be no more than 5 hydraulic valve manufacturers that can reach this level in Ningbo.

Stephen wondered why the material hardness of each part of AAK hydraulic check valve can be over HRC65?

1. Material selection is the core. AAK adopts 20CrNi2MoV high carburizing bearing steel imported from Germany for this hydraulic check valve.

2. Heat treatment is the key. Through secondary quenching + cryogenic treatment + low-temperature tempering process, it is cooled to 650 ~ 700 ℃ and put into the furnace. After cooling to 450 ~ 500 ℃, it is discharged from the furnace. The micro hardness is 237 ~ 247 HV.

3. In the later stage, point-to-point testing is the key. SonoDur3, a Rockwell hardness tester imported from Germany, adopts the UCI hardness test method, and the test program is fast and mobile to carry out nondestructive testing on the hardness of each component of the hydraulic check valve efficiently and accurately.

Stephen may understand that AAK has extreme pursuit for the hardness of hydraulic check valve to meet the working pressure above 450bar. Two days later, after the order of the hydraulic check valve was confirmed, he said that the complaint about the hydraulic check valve that had plagued him for half a year was finally solved at one time. We told him that he only needs to wait patiently for the delivery in 40 days, and the rest will be left to AAK.

AAK hydraulic check valve is exquisite in every detail. Welcome to give it a try!

Smith is the head purchasing of a hydraulic company from California. His purchasing of hydraulic valves in recent years has been smooth. In the last hydraulic valve block order, the parameters were normal when the hydraulic valve block approval sample was tested for the first time, but there was oil leakage in the second test on the hydraulic valve block. After rechecking, the oil leaked again in the third test on the hydraulic valve block. Smith communicated with the hydraulic valve block manufacturer for many times but without results. The manufacturer said that this is the traditional sealing process of hydraulic valve block, Smith should either accept it as is or cancel the order. Smith knew that the delivery date confirmed with the customer was due in 1 month, so it was urgent to find a new hydraulic valve block manufacturer to replace the current one.

Smith checked the sealing process of no less than 20 hydraulic valve block manufacturers. They all adopted the traditional sealing method of hexagonal plug combined with and sealing gasket. Smith knew that although this sealing method is simple to operate, it has very high requirements for tightening torque. When the torque parameters are not up to standard, the hydraulic valve block is easy to leak. In order to prevent leakage, some hydraulic valve block manufacturers apply anaerobic glue on the threads. During operation, the particles of anaerobic glue fall into the valve hole, causing oil pollution or valve jamming of the hydraulic valve block.

The delivery date is approaching day by day, but the new qualified hydraulic valve block manufacturer has not been found yet. Smith is worried and asks around. His friend Caleb gave him the contact information of AAK hydraulic valve. Caleb is also our hydraulic valve customer in the United States. He suggested Smith contact AAK, and told him that AAK hydraulic valve exports to European and American markets all year round and has some unique R & D processes. Perhaps AAK will be different in the sealing treatment process of hydraulic valve block.

Smith directly sent us the hydraulic valve block drawing and required that the traditional sealing technology should not be used. A week later, AAK sent the hydraulic valve block sample successfully. Two weeks later, Smith informed AAK by email that the parameters of AAK hydraulic valve block were fully up to standard after 3 tests, and there was still no leakage after the 4th and 5th tests.

Smith is very curious about how the sealing process of AAK hydraulic valve block is different from that of other hydraulic valve manufacturers?

The vast majority of hydraulic valve manufacturers fail to seal the hydraulic valve block in place because they stick to the rules in technology. 6 years ago, AAK was eliminated by the customer due to the leakage of the traditional sealing technology of the hydraulic valve block. After that, we decided to adopt the new technology. AAK has introduced new sealing technology and MB Series plugs of KVT company in Switzerland as early as 5 years ago. It mainly forms a solid sealing surface in between the metal parts in the way of expansion, extrusion and bite, so as to 100% avoid oil leakage of the hydraulic valve block, and fundamentally solve the difficulty of high-pressure sealing of the hydraulic valve block. At the same time, the pollution is small and the stability of the hydraulic valve block is stronger.

AAK Hydraulic valve block has the sealing technology comparable with Swiss technology, is pollution and leakage free, you are welcome to have a small try!

Bill is a purchaser of Manitowoc company in the United States. Two years ago, AAK received an inquiry about hydraulic counterbalance valves from him, and there were few contacts later. Unexpectedly, two years later, we received an email from him consulting about the problems of the hydraulic counterbalance valves. After communication, we learned that a batch of hydraulic counterbalance valves he purchased elsewhere had problems and almost got into a big trouble.

Last summer, a crane shipped by their company, the crane winch system lost control during construction and the hook slipped off. Fortunately, there was no one under the hook at that time, otherwise there would be great trouble. According to the analysis of the field engineer, it is considered that the hydraulic counterbalance valve used in the crane winch system is abnormal. After disassembling the hydraulic counterbalance valve, it is found that there is a deviation in the concentricity between the valve spool and the valve seat. The valve spool is affected by large eccentric hydraulic force, so that the hydraulic counterbalance valve lost its function of balance and the hook slipped off.

After knowing the reason, Bill contacted the original hydraulic counterbalance valve supplier. The supplier replied that the hydraulic counterbalance valves were indeed within the warranty period, he can replace the abnormal hydraulic counterbalance valves with a new ones, but can not guarantee that each hydraulic counterbalance valve had the same concentricity and could be used for more than 1 year. Bill was worried about the stability of the new hydraulic counterbalance valves. He didn't want to have big trouble and had to find a new hydraulic counterbalance valve manufacturer.

In crane hydraulic system, the performance of hydraulic counterbalance valve is the cornerstone of winch system, and the consistency of hydraulic counterbalance valve concentricity is the key. Bill also asked other hydraulic counterbalance valve manufacturers. No factory guarantees that the concentricity of the hydraulic counterbalance valve can be still consistent after 1 year of use. Bill wants to know how about the concentricity of AAK hydraulic counterbalance valves after being used for 1 year.

We told Bill that perhaps having a try is the best answer. He can detect the concentricity of AAK hydraulic counterbalance valves in an all-round way. After 15 days, we sent 4 samples of hydraulic counterbalance valves according to his drawings. Seven days later, Bill informed us that the concentricity test data of AAK hydraulic counterbalance valves were indeed more comprehensive than that of his original manufacturer. How to ensure that the concentricity of AAK hydraulic counterbalance valves is still consistent after 1 year of use?

For some manufacturers, when processing the components of hydraulic counterbalance valves, there are discrepancies between the specification parameters and design, the standard of normal distribution cannot be reached, there are certain differences in between the structure of components and the concentricity of grooves, which is difficult to detect. AAK has Mahr cylindricity instrument imported from Germany. Through EasyForm software, it can measure each part accurately and quickly, and obtain the measurement results. With the help of computer, the work piece can be quickly adjusted and aligned to improve the measurement efficiency, ensuring the concentricity of each hydraulic counterbalance valve is 100% consistent to reduce wear.

More than half a year later, Bill sent an email saying that another two hydraulic valve manufacturers that he recognized, also provided samples of hydraulic counterbalance valves with AAK together last time. All the hydraulic counterbalance valves were retested after 6 months of use. It was found that the concentricity of the hydraulic counterbalance valves from another two manufacturers changed compared with the data before use, but the concentricity of AAK hydraulic counterbalance valves did not change. The boss asked him to list AAK as the most trusted supplier for their hydraulic counterbalance valves.

AAK hydraulic counterbalance valves, are sophisticatedly inspected, can be used without no trouble. You are welcome to have a small try!

Henry is a purchaser of a hydraulic power unit manufacturer in the United States. He almost lost his job when he purchased the hydraulic pressure relief valves in the first time after just joining the company. AAK high-precision hydraulic pressure relief valves saved the job for him. Last October, one of their African customers customized a batch of hydraulic power unit equipment for use in African mining bases. The requirements of the equipment for the hydraulic pressure relief valves used are that there is no abnormality within 1 year.

Henry contacted more than 10 hydraulic pressure relief valve manufacturers and screened 4 samples from each of 4 factories. A month later, the engineering department debugged these hydraulic pressure relief valves. Almost all hydraulic pressure relief valves from every factory have unstable hydraulic system pressure, but only the proportion is different. At first, the engineer thought it was due to the installation of hydraulic pressure relief valves or the problem of oil quality. After several commissioning, it was found that the outlet pressure of hydraulic pressure relief valves was almost equal to the inlet pressure. After disassembling the hydraulic pressure relief valves, it is found that the geometric tolerance is out of tolerance due to the accuracy of the main valve spool and valve hole. After knowing this, the boss thought that Henry had a problem on the communication with the hydraulic pressure relief valve manufacturers and asked him to solve the purchasing of the hydraulic pressure relief valves with the manufacturers within 4 weeks.

Henry has made two rounds of screening for hydraulic pressure relief valve manufacturers and emphasized the working conditions, but still no one can achieve that every hydraulic pressure relief valve has no problem. He felt that he was cheated. The water in the hydraulic pressure relief valve industry was too deep. Henry found AAK hydraulic valve on Google and left a message on our website: Can AAK get the geometric tolerance of each hydraulic pressure relief valve consistent? After several rounds of e-mail communications, we learned about what happened when he purchased hydraulic pressure relief valves for the first time. We can only comfort him that he was misled by hydraulic pressure relief valve manufacturers due to lack of experience. He can test the samples of AAK hydraulic pressure relief valves. Three weeks later, AAK sent Henry 5 samples of hydraulic pressure relief valves. Their engineer tested each sample 3 times, and the hydraulic power unit equipment was normal. The boss praised his emergency ability. Now Henry doesn't have to worry about losing his job.

We told Henry that according to the working conditions and drawings of this hydraulic pressure relief valve, the accuracy of each hydraulic pressure relief valve is required to meet the standard and be stable, which needs to meet two points: one is the selection of materials, the other is the control of machining accuracy and the error correction of accuracy in machining, which is the key. AAK use the GILDEMEISTER turn milling compound machining center imported from Germany. During the machining process of various parts of the valve body, the central encoder can be used to measure the position and compensate the errors caused by tool wear. The worktable adopts the static pressure guide rail with pure static pressure load, which has strong bearing capacity. At the same time, it has the c-axis position detection technology with double reading heads that is not available in general equipment. The positioning accuracy of c-axis can reach 5 arc seconds, while at present, most hydraulic pressure relief valve manufacturers do not have this kind of equipment.

AAK hydraulic pressure relief valves are produced by high-precision advanced equipment. Welcome to have a small try!

Mathias, a Dutch hydraulic customer, urgently needed to purchase a batch of hydraulic valve blocks matching the German brand from China at the end of last year. He asked more than 10 old hydraulic valve block manufacturers. They all said that the accuracy of this hydraulic valve block was too high for their technology and equipment. Mathias had a hunch that nine times out of ten, the order for this hydraulic valve block would fail, because he knew that most hydraulic valve manufacturers just have CNC machine tools. But his boss attached great importance to this customer and asked him to implement the hydraulic valve block sample within 30 days. Within a week, Mathias consulted nearly 20 hydraulic valve block factories online and offline, almost all of them just have CNC lathes. Only two of them said that they have Japanese high-precision CNC machine tools. They can try to make samples but are not 100% sure. Two weeks later, Mathias tested the hydraulic valve block samples from 2 factories, and there was still a parameter error of 10% - 13%. Mathias suggested the factory re-make samples, and both factories surrendered.

Time has been wasted for 3 weeks. It's only 2 weeks from the deadline required by the boss. Mathias is anxious and has no direction. While chatting with old friend Andy, Mathias revealed his dilemma. Andy is a veteran in the hydraulic valve industry and has cooperated with AAK hydraulic valve for 5 consecutive years. Andy told Mathias that the accuracy of this hydraulic valve block requires not only high-precision machine tools, but also old operators who understand the equipment. Most hydraulic valve block manufacturers are difficult to meet these two requirements at the same time. He suggested Mathias try AAK, who likes to overtime difficulties on high-precision hydraulic valves, and most operators have more than 5 years of experience in operating imported equipment.

The subject of Mathias's first email to AAK hydraulic valve was that I was introduced by Andy. He said that the accuracy of this hydraulic valve block can only be produced in AAK. Opening his hydraulic valve block drawing, AAK engineers have 90% confidence. I replied to him directly that if it goes well, we can send the hydraulic valve block samples before the Chinese New Year holiday. Jan 28th is our last working day before CNY and the last day to send samples. Our team was great to send the samples on Jan 28^th.

When we came back from the Spring Festival holiday, we received an email from Mathias. Their technical team tested the accuracy of AAK hydraulic valve blocks. Each parameter met the accuracy required by the drawing, and almost every parameter was 30% higher than that of other hydraulic valve manufacturers. AAK is also the only hydraulic valve block manufacturer that can match the German brand among all the hydraulic valve manufacturers he contacted. He can finally make a report to his boss. Next, the order confirmation process of hydraulic valve blocks is very smooth.

Mathias understood why Andy is optimistic that AAK can achieve the accuracy of this hydraulic valve block. AAK introduced Demage five axis machining center as early as 2 years ago. The allowable rotation range is 115 ° (- 5 ° / + 110 °), which can carry out negative angle machining up to 20 ° and high-precision machining, which can not be achieved by many imported machine tools. At the same time, the torque can reach 1800Nm, the Y-axis stroke can be increased from 1250 to 1600mm, and the maximum speed of milling spindle can reach 8000r/min, while the maximum of conventional CNC can only reach about 5000r/min. As long as the operator is familiar with the performance of the equipment, the hydraulic valve block similar complicated to that of Mathias is successfully proofed at one time.

AAK hydraulic valve block is praised by Mathias that it is the only one that can match the German brand. Give it a try!

The hydraulic valve blocks designed and produced by AAK not only has high reliability and small pressure loss to ensure that there is no oil running between the channels, but also has compact structure, small occupied space, simple oil circuit and easy pipe layout, so as to ensure the high efficiency requirements of different actions of various actuator elements. The valve block can control the valve, which is easy to adjust and operate. AAK hydraulic valve block was designed and proofed successfully at one time within 1 month, which impressed the engineers of Samhydraulik company.

The vast majority of hydraulic valve block manufacturers blindly proofed according to customer drawings, ignored working conditions, and did not understand the internal structure and working principle of hydraulic valve block. It is easy to cause hidden dangers in the hydraulic system, and the problem cannot be found.

Justin left a message on AAK website (www.aakindustry.com) asking is the power insensitivity of the hydraulic system related to the hydraulic valve block? We replied that this is difficult to judge because it is a system problem that needs to be checked one by one. Justin emailed us the next day then we understood why he left such a message.

Justin is from Samhydraulik in Italy. The power unit of a hydraulic system developed by his company needs a hydraulic valve block. Their engineers mentioned that the sensitivity of the power unit is the key and that all components need to cooperate closely. Justin thought that as long as the hydraulic valve block manufacturer strictly controlled the accuracy according to the drawings, it could be easily done. After the hydraulic valve block is finished, it is installed to test the hydraulic power unit. After the oil pump is started, the instantaneous pressure supply at the oil outlet of the power unit does not come up, and it just supply normal pressure after a few minutes. After checking each component one by one, it is suspected that there are hidden dangers in the hydraulic valve block. After detecting the hydraulic valve block, there is no problem in the oil passage and channel of the hydraulic valve block. Justin contacted the original hydraulic valve block manufacturer for analysis and solution. The manufacturer said that the hydraulic valve block was completely produced in accordance with the drawings of Samhydraulik company, and the accuracy was within the required range, and the reason for problem was unknown. Justin contacted several other hydraulic valve block manufacturers, they all said that they could match the drawings, but not sure about the problems of the hydraulic valve blocks.

We asked Justin to tell us the working condition of the whole hydraulic system and the picture of the oil circuit running direction of the hydraulic valve blocks of the original manufacturer. AAK engineers have ideas after 3 aspects of comparative analysis. We told Justin that if your engineer determines that the problem lies in the hydraulic valve block, we will send you two samples of our hydraulic valve blocks to test your hydraulic system. Three days after receiving the samples, Justin informed that the instantaneous pressure supply at the oil outlet of the power unit was normal with AAK hydraulic valve blocks. Their engineers were surprised that AAK completed the design of the hydraulic valve block within 30 days and successfully proofed at one time.

The problem of the hydraulic valve block lies in the high integration of the valve block design and the tortuous oil circuit, which will lead to high pressure loss and slow rise of system pressure. AAK engineers improved the design of the hydraulic valve block. The newly designed hydraulic valve block has no oil running between the channels, compact structure, small occupied space and optimized oil circuit piping, which not only has high reliability but also small pressure loss. AAK chief engineer has more than 20 years of technical experience. He is good at cross-sectional view, measurement and perspective of hydraulic valve block design system, multi angle observation of design process, hole connectivity, oil circuit optimization, and the escort of MDTools 3D solid design and virtual manufacturing software and high-precision CNC machining center imported from Switzerland. Many manufacturers do not know the problem of the hydraulic valve block. AAK can improve the design and make a successful proofing at one time within 30 days. I think this is the difference between AAK hydraulic valve block and its peers.

AAK hydraulic valve block, not blindly based on drawings, but focused on the working principle, you are welcome to have a small try.

Connor is a purchaser from a Russian hydraulic company. There has never been oil leakage due to sealing in his previous purchases of hydraulic valve blocks. Some time ago, a rated pressure up to 450bar hydraulic valve block let him suffer due to the oil leakage of the hydraulic valve block. He communicated with the original manufacturer for many times and debugged for 3 times, but the oil leakage problem still cannot be solved. He then asked his other hydraulic valve block suppliers, they all suggested Connor giving up, because the current sealing technology cannot meet the pressure rating of 450bar hydraulic valve block.

Connor also communicated with some new hydraulic valve block manufacturers online, and gradually understood the shortage of sealing technology. The 90% of hydraulic valve block manufacturers use the conventional sealing method of hexagon socket plug and sealing combination gasket, which is suitable for hydraulic valve blocks with rated pressure of 50-350bar only. For any over 350bar, this sealing method does not work and they have to give up.

Can the sealing problem on a hydraulic valve block with 450bar rated pressure really not be solved? Connor still didn't give up. He found AAK hydraulic valve on B2B and came across an article about AAK hydraulic valve block using Swiss sealing technology to solve the oil leakage of hydraulic valve block. He left a message on our website: can you really solve the problem of oil leakage of hydraulic valve block with rated pressure above 450bar? Seeing this message, I realized that he should have been cheated by other manufacturers before, so he doesn't believe in the new hydraulic valve block manufacturers easily. We replied to him, no matter how much we said, maybe you don't believe it. Simply put, you directly order 1pc of hydraulic valve block according to your drawing. If the hydraulic valve block produced by AAK still leaks oil, we will directly refund you the fee of this testing order.

Maybe Connor has no other choice or he sees hope, he agreed our suggestion. 14 days later, he received AAK hydraulic valve block. 2 days later, the test result came out. Their engineers deliberately pressurized it to 550bar, and no hidden danger of oil leakage was found in AAK hydraulic valve block. He wondered why AAK hydraulic valve block had no problem with even a rated pressure at 550bar?

The reason that AAK hydraulic valve block can operate normally in the hydraulic system with the pressure of 550bar is because of the introduction of new sealing technology and MB Series Plug of KVT company in Switzerland. This plug mainly forms a solid sealing surface after intermetallic extrusion in the way of expansion and bite, so as to 100% avoid oil leakage of hydraulic valve block, fundamentally solve the problem of high-pressure sealing of hydraulic valve block. At the same time, it reduces pollution, so that the hydraulic valve block is more stable. This is also why Connor recognized the quality of AAK hydraulic valve block.

AAK hydraulic valve block, superior sealing, zero leakage, you can also have a small try.

Dimon is a new buyer of a hydraulic equipment manufacturing company in the United States. In the second half of last year, he purchased 100 hydraulic needle valves from an old supplier. After receiving the goods, the hydraulic needle valves were installed on the equipment. A few months later, some users complained that the pressure supply of some equipment was insufficient. Their technicians judged that the radial jamming of the valve spool of the hydraulic needle valve resulted in no flow regulation, which would lead to the failure of the power unit. The hydraulic needle valves need to be replaced with new ones as soon as possible to eliminate user complaints. His boss is not very satisfied that problem happened on even such a small number purchasing of hydraulic needle valves.

Dimon is confused why the hydraulic needle valve supplier who had cooperated for 2 years would have such quality problems. He sent some problematic hydraulic needle valves back to the factory. The manufacturer replied that the accuracy of these hydraulic needle valves met the standard, but a small deviation in the size of the valve spool was caused by the deviation of the assembler. At that time, several valves were assembled at the same time in the assembly workshop, and a few deviations were difficult to avoid. Dimon realized that even the original manufacturer replaced the hydraulic needle valves with new ones, it still can not solve the problem of the radial jamming of the valve spool for 100%. He was afraid that if there were more user complaints, could he keep his job during the probation period?

Dimon decided to find a new supplier of hydraulic needle valves. He left a message on our website: Can you solve the problem of radial jamming of the valve spool of hydraulic needle valve? At first, it was hard to answer this question. After several rounds of communication, we learned the story of his purchase of these 100 hydraulic needle valves. After reviewing the working conditions and drawings of hydraulic needle valve from Dimon, as well as the pictures of hydraulic needle valves from the original supplier, AAK suggested him trying samples directly. 20 days later, AAK sent 10 samples of hydraulic needle valves made per his requirements.

Two months later, Dimon sent an email to us saying that he selected 5 factories from more than 20 hydraulic needle valve manufacturers to make samples. Only the samples from AAK and another factory did not have the problem of radial jamming of valve spool during the test. Their engineers suggested that AAK should be selected to replace the 100 hydraulic needle valves with potential quality problems, because the parameters of AAK hydraulic needle valve are the most stable. The boss knew that he dared to develop new suppliers and solved the hidden quality problems, although the probation period is not over yet, Dimon was approved to become a regular in advance. He told us this story privately.

To do this hydraulic needle valve well, it needs not only high-precision equipment, but also need to avoid personal assembly errors. AAK has technical workers with more than 10 years of operation and production experience, combined with advanced high-precision honing machines, CNC machine tools and other production equipment, as well as advanced three coordinate instrument, cylindricity instrument, profilometer and other testing equipment. The most important thing is that AAK has specially assigned personnel to control the assembly process of hydraulic needle valves, so as to avoid partial mixture wrong assembly caused by cross assembly by multiple people, especially in the assembly process of similar valve bodies. Many factories arrange cross assembly in order to save personnel and improve efficiency, resulting in wrong assembly of accessories. This assembly process of AAK hydraulic needle valves is unique in the industry. Maybe there is no second factory in Ningbo, the hometown of hydraulic valves to do this like us.

AAK hydraulic needle valves, no radial jamming of valve spool problem, welcome to have a try!

AAK uses the DMG five axis machining center imported from Germany, which improves the stability and accuracy by 30%. Less than 5% of the hydraulic valve block manufacturers in the domestic industry are equipped with this set of equipment. After suffering losses elsewhere, an American customer went back to AAK after 45 days to place the order for hydraulic valve blocks.

Last December, I received an inquiry from American customer Joshua about a hydraulic valve block. At that time, I was a little surprised to see the accuracy requirements of the hydraulic valve block. The accuracy was 5% higher than that of HydraForce series. This was not a small challenge, but I was still confident. The next day, I sent quotation to Joshua directly. Joshua then said that it was 12% higher compared with other hydraulic valve block manufacturers, he could not place an order with AAK. After 45 days, Joshua asked us whether the last quotation of hydraulic valve block was still valid. If the original price is maintained, he will place the order for the hydraulic valve block.

For the sincerity of cooperation, Joshua also frankly told why he moved the hydraulic valve block order to AAK. The original hydraulic valve block manufacturer made samples for two times, and the parameters of each hydraulic valve block were not very stable. Some hydraulic valve block sample had very good accuracy, while others were very poor, which wasted 3 weeks of time. Joshua also checked with other manufacturers. All of them are not confident to achieve the accuracy that is 5% higher than that of HydraForce series. Another 2 weeks were wasted again. The customer was very angry that the order has been placed for 5 weeks, but the sample of the hydraulic valve block still could not be approved. Joshua felt that only AAK can make the sample successfully at one time. Even if it is 12% more expensive, it is acceptable. Aware of Joshua's dilemma, we specially spare a high-precision DMG five axis machining center lathe to arrange the proofing of this hydraulic valve block. A week later, AAK sent the hydraulic valve block samples. After 10 days, there was still no feedback from Joshua about the hydraulic valve block samples. We asked Joshua to know that he was also waiting nervously.

Until Joshua's email last week, we know that his customer was very surprised that the accuracy of this hydraulic valve block sample not only exceeded 5% that of the HydraForce series, but the parameter stability of AAK hydraulic valve block was also more than 30% higher than that last time. Frankly, we were not surprised by this data, because more than one customer was surprised by the accuracy parameters of AAK hydraulic valve blocks.

The reason why the accuracy of AAK hydraulic valve block exceeds 5% of HydraForce series is that it firstly benefits from the continuous updating of the equipment. When the vast majority of hydraulic valve block manufacturers update from CNC lathe to domestic Mazak machine tool, AAK introduces DMG five axis machining center produced in Germany. The domestic Mazak machine tools have weak rigidity, poor stability and low precision after long-term processing. The lathe of DMG five axis machining center is equipped with transverse sliding seat of stiffened cast iron column, which provides the machine with high precision and high rigidity. It adopts the latest numerical control technology DMGEROline ® control panel, 19" display and 3D software, and guarantee the maximum working speed, accuracy and reliability.

AAK hydraulic valve block, high precision, advanced equipment, you can also have a try!

Andy is our old hydraulic valve customer in the United States. The hydraulic cartridge valves he purchased from AAK in previous years always has a standard of machining surface roughness around 0.8μm. In February last year, Andy sent an email to inform us that in the future, the machining surface accuracy of their hydraulic cartridge valves will be improved to within 0.3μm. AAK engineers believe that based on the current equipment system, it is very difficult to improve the machining surface accuracy of hydraulic cartridge valves to 0.3μm. It is also very difficult to find such a hydraulic cartridge valve manufacturer in Ningbo.

I know that AAK has only two options, either give up the business of his hydraulic cartridge valves or accept his accuracy standard. This is the first time I have faced the choice of "standing in line" since I joined the hydraulic valve industry. The cooperation with Andy has always been trustworthy, pleasant and efficient. AAK doesn't want to give up such customers. After two rounds of communication internally, AAK technical team has not reached a consensus. I have to call my retired master and hope to hear his opinions.

My master told me that this is a rare opportunity to catch up with and surpass the accuracy of international hydraulic cartridge valves. The roughness of the working surface under 0.3μm is rare in China, but some European hydraulic cartridge valve manufacturers have this strength. AAK must first start with the equipment, and then select the most experienced operators from the factory for special aircraft training, so as to have the opportunity to compete with those top European hydraulic cartridge valve manufacturers. American HARDINGE precision CNC lathe is worthy of a try. At present, none of the domestic hydraulic cartridge valve manufacturers have this equipment.

After contacting the equipment manufacturer, AAK technical team took the hydraulic cartridge valves produced for Andy before to the equipment factory, and asked the engineer of the equipment manufacturer to go directly to the machine for proofing. A week later, we sent the hydraulic cartridge valve samples to Andy and asked them to test the accuracy parameters. Two weeks later, Andy informed that the previous hydraulic cartridge valve accuracy test was completed twice. This time, AAK hydraulic cartridge valve was tested 4 times, and the accuracy fully met the standard. At the same time, he told me that after receiving the accuracy improvement notice, the other 3 domestic hydraulic cartridge valve manufacturers directly gave up, and only AAK dared to test the sample and succeeded in one test. He was very surprised.

The machine tool to be introduced by AAK has advantages in accuracy. The parameters of the machine tool: spindle speed up to 6000r/ min, spindle radial run out ≤ 0.0008mm, positioning accuracy (X/Z) ≤ 0.005mm/0.008mm, repeated positioning accuracy (X/Z) ≤ 0.003mm/0.005mm, and machining surface roughness Ra ≤ 0.3μm. Turning roundness ≤ 0.4μm. Turning cylindricity ≤ 0.1μm. The spindle is a spring collet to clamp the workpiece, with large clamping area and stable processing. It is equipped with FANUC21i-T numerical control system with high precision.

Now this HARDINGE machine tool is almost the special equipment for the orders from Andy. The order volume that Andy awarded to AAK has also increased by nearly 60%. He said that AAK hydraulic cartridge valve has surpassed many European factories in terms of precision.\

AAK hydraulic cartridge valves, with precision surpassing that of Europe, you are welcome to have a small try!

Cuenca is a senior purchaser of AGRIA company in Spain. The boss is very satisfied with his purchasing work. Two years ago, AGRIA company developed a hydraulic equipment, and there were complaints after sales for more than half a year. The main problem was that the starting force of the hydraulic system would be insufficient, which was caused by the increase of internal leakage of the hydraulic check valves in the equipment. After Cuenca contacted the original hydraulic check valve manufacturer, the manufacturer said that some hydraulic check valves may have deviation during assembly, and he was willing to replace the hydraulic check valves with large leakage with new ones. Cuenca thought it was completely solved after replacement, but what surprised him was that less than a year after the new hydraulic check valve was replaced, the same problem occurred again. The boss was very disappointed with his purchase of hydraulic check valves this time.

The manufacturer of the original hydraulic check valves still said that except for replacing the hydraulic check valves, there is no other way. Cuenca began to worry that if the same problem happened a third time, it would be too shameless. To be safe, he began to look for a new supplier of hydraulic check valves and began to test samples. At the same time, he also wanted to know why the hydraulic check valves produced by the original manufacturer leaked. In this way, Cuenca contacted AAK hydraulic valve.

After several rounds of communication with Cuenca, we learned the story between him and the original manufacturer of hydraulic check valves, and suggested him to send us the hydraulic check valves with problem and provide us the drawings of hydraulic check valves at the same time. AAK engineer disassembled the hydraulic check valves of the original manufacturer and found that there were wear marks on the sealing line on the surface of the poppet valve. When the pressure oil reversely enters the hydraulic check valve, the cone cannot strictly seal the oil and cause leakage, and some oil flows out of the oil inlet. After receiving AAK's analysis, Cuenca asked us to make 4 samples of hydraulic check valves according to his drawings.

Our engineers designed a new hydraulic check valve according to the service frequency and working conditions of the equipment, replacing the cone valve with the ball valve. The cone valve is prone to fatigue creep deformation and wear after working for a long time, resulting in a gap between the valve sleeve and the cone, resulting in leakage. The outer circle of the ball valve can contact the inner taper ring line, and the connecting hole can be closed to reduce the leakage caused by wear. Cuenca was surprised that AAK dared to take the initiative to modify the drawings of their hydraulic check valves, and expected to see the sample performance of AAK hydraulic check valves.

Two months later, AAK sent samples of the newly designed hydraulic check valves. A year later, Cuenca said that the hydraulic equipment equipped with AAK hydraulic check valves had no complaints about startup. He was glad that the original hydraulic check valve manufacturer replaced it again and again, which could only guarantee the service for half a year, but AAK solved the problem one time. In only 2 months, AAK helped solve the problem of leakage in the hydraulic check valves that plagued Cuenca for nearly 2 years. Cuenca would rather give up the original supplier who has cooperated for many years than choose AAK hydraulic check valves.

AAK hydraulic check valve, valve spool design is unique and different, welcome to have a small try!

Last Friday, we received 3 emails from Niki, they are all the order for a same hydraulic check valve, but only the ship to address is different. It is the first time for their company to place the orders of 1,500 hydraulic check valves at one time. Niki is a purchaser of a Dutch hydraulic equipment company. Last year, a boarding bridge equipment needed hydraulic check valves. At that time, he planned to purchase from old suppliers. Unexpectedly, after dozens of hydraulic check valves from the initial samples were installed on the boarding bridge and tested for less than a month, the boarding bridge will slowly decline automatically. The engineer judged that the hydraulic system did not maintain the pressure, and it is likely that some hydraulic check valves leaked. However, after disassembling and inspecting the hydraulic check valves, it was found that the matching clearance accuracy of the valve spool and valve sleeve was within the normal range, and there was no jamming.

Niki contacted the hydraulic check valve manufacturer, and manufacturer also didn't know why the hydraulic check valve leaked, so they could only replace those leaking hydraulic check valves. Niki is a little worried that if the leakage source of the hydraulic check valve is not found and replaced blindly, there may be a bigger problem later. Niki was not satisfied with the old supplier and had to start looking for new manufacturers of hydraulic check valves again.

AAK received message from Niki on our website: what are the reasons for the leakage of hydraulic check valves? I realized that there was a leak in the hydraulic check valves purchased by Niki, but he hasn't found the root cause. After receiving the drawings of hydraulic check valve and the working conditions of boarding bridge equipment provided by Niki, we still can't 100% determine what caused the leakage of hydraulic check valve. We suggest him send us one of the previously leaked hydraulic check valves for analysis. After dismantling, our engineer is 90% sure to understand the root cause of the leakage, but still need to try sample to make it 100% sure. Niki is also willing to allow AAK to make samples according to his hydraulic check valve drawing.

One month later, we sent 12 samples of hydraulic check valves to Niki and told him that the leakage of the hydraulic check valves from original manufacturer should be caused by poor details in production. There will be a certain gap between the cap and the thread of the valve sleeve of the hydraulic check valve. How to seal this gap is not only the detail but also the key, especially for the equipment with high working conditions. AAK uses thread anaerobic adhesive, which can completely fill the gap, enhance the sealing or retention force of mechanical connection components, prevent thread loosening and leakage due to vibration between the cap and valve sleeve of hydraulic check valves, and protect the joint from corrosion. Few hydraulic valve manufacturers can operate in this detail of gap sealing. Niki learned about this analysis, and replied that among more than 20 hydraulic check valve manufacturers he contacted, only AAK analyzed the sealing details. He expected to test the function of AAK hydraulic check valve samples.

The 3 consecutive emails for orders last Friday should be indicating that the samples of AAK hydraulic check valves have passed the test. Niki specifically stated in the email that the reason why he chose AAK was that every detail of AAK hydraulic check valves was perfect and there was no leakage, so he placed big orders.

AAK hydraulic check valves, focused on every detail, you are warmly welcome to have a small try!

This morning, Robert sent an email asking about the production time of 1,200 hydraulic check valves, which surprised me a little, because in the past 2 years, he normally just placed small quantity trial orders of hydraulic check valves. Robert is a purchaser of John Finlay company in Australia. We met 2 years ago. A batch of hydraulic tamping machine equipment of their company began to receive complaints again and again from the previous year. After inspection, it was found that the hydraulic check valve in the equipment did not maintain pressure. Robert contacted the original hydraulic check valve manufacturer to find a solution. The manufacturer advised that the working pressure and working frequency of the hydraulic tamping machine may be too high, resulting in frequent collision between the ball valve and valve seat of the hydraulic check valve, affecting the sealing effect. The only solution is to replace the leaked hydraulic check valve. Although replacing the hydraulic check valve is a heavy workload, Robert has no choice but to accept. The trouble is that 6 months later, the same problem happened again. The customer was very unhappy. The boss asked Robert to find a new supplier of hydraulic check valve immediately.

Robert suggested purchasing hydraulic check valves from AAK to replace those unqualified ones, because the durability test of AAK hydraulic check valves was the most lasting among all of the samples from different manufacturers at the beginning. At present, there is an equipment installed with AAK hydraulic check valve, which has been used for 1 year but without any abnormality. The boss thought that the price of AAK was more than 20% higher and unacceptable, and asked Robert to look for a new manufacturer of hydraulic check valves.

In the process of continuous screening, Robert selected 5 hydraulic check valve manufacturers to try their samples. Basically, after half a year, these hydraulic check valve samples had similar problems one after another. Robert was at a loss. He once again suggested to the boss to purchase AAK hydraulic check valves. After comparing so many hydraulic check valve manufacturers, none of their samples can be used for more than 1 year under this working condition, but the equipment installed with AAK hydraulic check valve has been used for nearly 2 years, and there has been no failure to maintain pressure. If the hydraulic check valve needs to be replaced every 6 months, the after-sales cost is too high, which has far exceeded the 20% higher cost of the hydraulic check valves. More importantly, it brings the reputation of unstable equipment quality to users. After listening to Robert's analysis, the boss approved AAK as the preferred supplier of their company for hydraulic check valves.

It took Robert 2 years to persuade his boss to place a large order with AAK. He knew that the durability of AAK hydraulic check valve was more than twice that of other suppliers, and the after-sales cost was also low. How can AAK hydraulic check valve be durable under high pressure and high frequency use? According to the working condition requirements and working frequency of their company's equipment, AAK uses silicon nitride (Si3N4) ceramic ball as the ball valve, which has twice the hardness than steel, lower thermal expansion coefficient than steel ball, good roundness and small friction coefficient. It can resist the corrosion of most chemicals and can still not be worn under the condition of high pressure and high frequency use. The vast majority of hydraulic check valves are steel balls. Because the price of silicon nitride (Si3N4) ceramic balls is more than several times higher than that of ordinary steel balls, it will not be considered for cost saving. However, AAK uses special materials for special needs in combination with working conditions and use frequency, especially what most hydraulic check valve manufacturers are unwilling to do, but AAK likes this challenge most.

AAK hydraulic check valves, focused on meeting customer needs. You can also give it a try!

Duden is from Lukas hydraulic equipment company in Germany. We have cooperated for more than 2 years on hydraulic check valves and hydraulic throttle valves. The order volume is small each time, but the parameter requirements are very high. AAK never despised it because of the small order quantity of the hydraulic check valves or hydraulic throttle valves. At the end of last year, their company developed a new hydraulic unit. Due to time constraints, Duden purchased hydraulic check valves and hydraulic throttle valves from local hydraulic valve manufacturers in Germany. The technicians found the original design defects after installing the integrated valve into the equipment. The position of the hydraulic throttle valve next to the hydraulic check valve is high, accounting for a little position of the motor, which makes it difficult to install the motor.

Lukas engineers are a little depressed. If the position of the hydraulic throttle valve is changed, the whole oil circuit layout needs to be changed, but the power supply of the hydraulic system will be affected after changing the oil circuit. What is more troublesome is that there is not much time to redesign and proofing. The Engineers asked Duden to contact some local hydraulic valve manufacturers to check if the design size of the hydraulic throttle valve could be slightly adjusted so that the motor could be installed.

Duden checked with several local hydraulic valve manufacturers, all of them were not willing to make samples because of small quantity of the hydraulic throttle valves. Duden tried to purchase small-size hydraulic throttle valves from China to solve the installation problem of the motor. Some Chinese hydraulic valve manufacturers said that they could make samples according to the requested size of their hydraulic throttle valves, but the time needed was more than 30 days. Duden couldn't accept this time and was more worried about the quality of hydraulic throttle valves from these factories. Duden sent an email to AAK asking if we could make several samples of hydraulic throttle valves in 5 days. In the past, the sample time gave by Duden was usually flexible with more than 2 weeks. After asking, I learned that their designers are facing embarrassment.

It is also too tight for us to make several hydraulic throttle valves in only 5 days. I suggest Duden give us the overall layout of the integrated valve block. Maybe our engineer has a solution. According to the hydraulic schematic diagram provided by Duden and the specific use of the hydraulic integrated valve block, AAK engineers analyzed it step by step. Finally, it was found that if the hydraulic throttle valve and the hydraulic check valve were designed in parallel, the functions of the two valves were combined to form a hydraulic throttle check valve, which was installed at the position of the hydraulic check valve, and the installation hole of the hydraulic throttle valve was blocked with a plug. This not only saves the redesign time of the hydraulic integrated valve block, avoids the embarrassment that the motor can not be installed, but also has no impact on the pressure supply of the hydraulic system. Their designer was surprised that AAK used this idea to solve the pain point. He hoped that we could make the samples to test as soon as possible.

AAK sent the newly designed hydraulic throttle check valve to Duden. After installing the hydraulic throttle check valve into the integrated valve block, the results were as described by AAK, and the test was successful. The design engineers of Lukas company admire AAK unique design scheme and production capacity greatly.

AAK hydraulic throttle check valve can efficiently and timely solve problems for customers. Welcome to give it a try!

This Monday, Arthur sent an email to purchase 1,600 hydraulic threaded cartridge valves at one time, which was a little unexpected. Arthur came from a hydraulic equipment manufacturing company in Italy. He met with us at the PTC exhibition in Shanghai 3 years ago. At that time, he communicated with us for about half an hour. Then there were several inquiries for hydraulic threaded cartridge valves and several trial orders for hydraulic threaded cartridge valves. Last October, he suddenly sent an email saying that he had a client in Ningbo who wanted to visit AAK hydraulic valve factory. We introduced in detail a series of production links from raw material inspection and warehousing to rough machining, finishing, process inspection, assembly of valve body and spool, testing, packaging, warehousing, marking and shipping of each part of hydraulic threaded cartridge valve. After the visit, Arthur's client said they were satisfied with the scale, equipment and management of AAK factory and left. I wondered if this was really Arthur's client.

More than a month later after visiting the factory, Arthur said that his company has developed a new hydraulic equipment, which requires high-precision hydraulic threaded cartridge valve. AAK needs to quote and make samples for testing as before. AAK sent 16 samples of hydraulic threaded cartridge valves after 30 days. I still think that this one will be the same as that one year ago, no big waves. I didn't understand that I made the mistake of "I thought" until receiving the large order of 1,600 hydraulic threaded cartridge valves yesterday.

Today, I learned by email that it was not his client who came to visit the factory last year, but his assistant who often stayed in China. Before the company developed this hydraulic equipment, his assistant ran to more than 30 hydraulic valve manufacturers in China, especially for this special hydraulic threaded cartridge valve. AAK hydraulic valve has its own advantages in equipment and extension of equipment and on-site detail management. In particular, the component testing room of AAK is constant temperature and humidity for 24 hours, which is very helpful for hydraulic threaded cartridge valves with high precision requirements.

Because of the particularity of this hydraulic threaded cartridge valve, the accuracy inspection of each component should be completed in a specific environment. Some quality problems of the products of many hydraulic valve manufacturers are just due to the deviation of the test results caused by the instability of the test environment. In the view of many factories, this may be a small detail, but AAK has done extremely rigorous testing. His assistant has not found a second one in Ningbo who pays so much attention to detail. That's why Arthur chose AAK to produce this big order of hydraulic threaded cartridge valve.

AAK hydraulic threaded cartridge valves, with much attention on details, high standard and high inspection. Welcome to try a small order!

Logan has been a purchaser of a hydraulic company in the United States for several years, and the purchasing of hydraulic valves in China is also very smooth. But recently, a high-precision hydraulic relief valve order worth more than $30,000 wasted him a lot of time. The original hydraulic relief valve manufacturer made the samples twice, but was still not approved by the customer. His customer understood that the original manufacturer was unable to meet the requirement of 0.3mm finish size allowance, and asked him to change the hydraulic relief valve manufacturer to make samples for the third time. If the hydraulic relief valve sample for the third time still cannot be approved, the customer can only cancel the order. This order attracted the attention of his boss, who asked him to solve the problem and get the sample of hydraulic relief valve approved at one time within 20 days.

Five days later, Logan consulted many hydraulic relief valve suppliers, and most manufacturers said that they could not meet the standard of 0.3mm finishing size allowance. Logan is a little worried. He looks for hydraulic relief valve manufacturers everywhere on the Internet. He left a message on our AAK website: how can we guarantee the finishing dimension allowance? All such messages are basically for difficult problems encountered in the purchase of hydraulic valves. After some communication, it is understood that the Logan was stuck on the sample approval process of the hydraulic relief valve order, and he has contacted many hydraulic relief valve manufacturers, but no solution has been obtained.

I suggested Logan try our sample directly, and let the test data to speak for itself and this also saves time. Logan doesn't seem to have a choice but to expect that maybe AAK hydraulic relief valve can pass the test. A week later, AAK sent out 3 hydraulic relief valve samples. Logan did not dare to send the samples to the customer directly after receiving them, so he had to find a third party for testing before sending them to the customer. Without incident, the customer approved AAK hydraulic relief valve samples. His boss was also surprised that how a hydraulic relief valve manufacturer found by Logan this time can solve the problem so quickly at one time.

The heat treatment process in the early stage is the first step of finishing the size allowance. Most hydraulic relief valve manufacturers adopt local quenching, so the heat treatment process of the workpiece is not easy to control and may be deformed. As early as 6 years ago, AAK adjusted local quenching to overall quenching. At the same time, vertical flow treatment must be required for the hoisting mode in the process of quenching and tempering, so as to minimize the influence of tissue stress and thermal stress on deformation during workpiece heat treatment, so as to meet the requirements of dimensional allowance for finishing.

Logan cancelled the order with the original hydraulic relief valve manufacturer without hesitation and confirmed the order with AAK hydraulic valve in two rounds. Logan privately told us that his customers like the hydraulic relief valve manufacturers such as AAK very much. The customer pointed out that AAK should be as the priority supplier for future inquiry of hydraulic relief valves. His boss was also very satisfied with his ability to quickly solve problems this time, and put higher and higher expectations on him.

AAK hydraulic relief valves, strictly controls the size allowance of finishing to ensure the accuracy of products. You can also have a small try!

Erik compared more than 20 hydraulic pilot pressure control valve factories. No manufacturer can do the hydraulic pilot operated pressure control valves which can be used under high pressure above 450bar for more than one year. AAK hydraulic pilot operated pressure control valve passes the test at one time, and there is no abnormality after one year of use.

Erik is from a German hydraulic equipment manufacturer. In the first half of last year, the company needed to purchase a special hydraulic pilot operated pressure control valve with a working pressure of more than 450 bar, a service life of more than one year and a durability of more than 2 million times. The boss realized that it was some difficult to purchase the hydraulic pilot operated pressure control valve this time, and asked Erik and his colleague to purchase at the same time. Whoever successfully purchased the hydraulic pilot operated pressure control valve first will be promoted and raised. Erik is full of energy and keeps looking for hydraulic pilot operated pressure control valve factories online and offline. He contacted more than 20 new suppliers, including AAK hydraulic valve.

Most of the hydraulic pilot operated pressure control valve manufacturers replied that they need to be customized from the beginning of materials, and it takes 25 days to sample this special hydraulic pilot operated pressure control valve. Erik chose two factories to test the samples. A month later, Erik received the samples and asked the engineer to test them. The results failed, but the hydraulic pilot operated pressure control valve obtained by his colleague passed the first test, which made Erik very depressed. Fortunately, this is just in the test stage, the final effect depends on the test results of the hydraulic pilot operated pressure control valve one year later. Erik contacted AAK for the second time. He clearly informed that the samples of hydraulic pilot operated pressure control valves he selected in the first round failed. For the first time, he did not choose AAK because AAK needed 35 days. This time, he only asked AAK to make samples. Whether he can win or not, he can only count on AAK. Because the material selection and internal test of hydraulic pilot operated pressure control valves need time, Erik also understands the difficulties of making the samples. After 35 days, AAK sent 6 samples of hydraulic pilot operated pressure control valves.

Last week, almost a year after the hydraulic pilot operated pressure control valve samples were sent, Erik sent an email to inform that AAK hydraulic pilot operated pressure control valve was the only sample that passed 2 million tests, and there was no abnormality after one year of use. Although his colleague's sample passed the early test, it could not withstand the high pressure above 450 bar for enough time, it leaked in less than a year. A few days ago, the boss praised Erik's purchasing ability at the company conference, and his dream of promotion and salary increase has also been realized.

Erik was surprised that why AAK hydraulic pilot operated pressure control valve was normal after 1 year of use, while other manufacturers surrendered early? The core of this hydraulic pilot operated pressure control valve is material and heat treatment. AAK adopts 20CrNi2MoV high carburizing bearing steel imported from Germany, combined with carburizing pretreatment process, through secondary quenching + cryogenic treatment + low temperature tempering process, which is cooled to 650 ~ 700 ℃ and discharged after cooling to 450 ~ 500 ℃. The microhardness is 237 ~ 247 HV, and its wear resistance and contact fatigue performance are increased by more than 3 times. After heat treatment, the thermal stability and compressive strength of the material have long been far ahead. Most manufacturers may choose right materials, but they may not be able to do a good heat treatment.

AAK hydraulic pilot operated pressure control valve, select and use good materials. You are welcome to have a small try!

At the beginning of last year, Lawrence sent an email to ask for help. He is a purchaser of a hydraulic equipment company in Italy and has cooperated with AAK for 2 or 3 years. Almost all of the orders are a small number of hydraulic check valves with high requirements. When encountering problems, he always asks for help from AAK, and AAK is also happy to help him. After several rounds of email communication, it turned out that the power unit for controlling the hydraulic lifting column produced by their company had a customer complaint 3 months after sales. Their engineers found a leak on the valve block of the power unit, that is, around the valve hole equipped with the hydraulic pilot operated check valve. It is preliminarily judged that the leakage should be caused by the wear of the seal of the hydraulic pilot operated check valve. However, after dismantling the hydraulic pilot operated check valve, it is found that the sealing ring is intact.

After Lawrence communicated with the original manufacturer of hydraulic pilot operated check valve, they both thought that there should be no problem with the hydraulic pilot operated check valve or valve block, because the test data before shipping were qualified. The leakage problem should be caused by the wrong operation of the installation personnel of their company. Lawrence seemed to understand because it is true that the test result of the hydraulic pilot operated check valve originally shipped was OK. Lawrence asked their engineers to reinstall it. As a result, it worked normally and everyone thought the problem had been solved. But 3 months later, the same problem happened again, and the customer could not accept and requested to return goods. The boss was very angry and asked Lawrence and the engineer to completely solve the leakage problem of the hydraulic pilot operated check valve. This is why Lawrence emailed to AAK for help.

AAK engineers analyzed according to the valve block integration diagram and the drawing of hydraulic pilot operated check valve provided by Lawrence. There is an assumption that the frequent vibration of the power unit of the hydraulic lifting column affects the stability of the installation of the hydraulic pilot check valve. Following this idea, it is found that the hole depth of the threaded socket integrated with the valve is not enough, which leads to the loosening of the jack position of the hydraulic pilot operated check valve. This problem can only be solved by adjusting the depth of the jack, increasing the thread torque of the hydraulic pilot operated check valve and increasing the bonding area between the valve and the hole. The next day I emailed Lawrence the idea of our engineer's. If we want to verify this idea, we can only make samples. One month later, AAK sent the redesigned hydraulic pilot operated check valve and integrated valve block to Lawrence.

Last week, Lawrence sent an email saying that after the hydraulic pilot operated check valve and valve block redesigned by AAK were installed on the equipment, so far, the hydraulic lifting column has been used without abnormality. The customer was very satisfied that they finally solved the leakage problem of the hydraulic pilot operated check valve at one time. His boss also appreciated Lawrence for helping the company solve the after-sales problem.

AAK hydraulic pilot operated check valve is cleverly designed to easily solve the leakage problem. Welcome to have a small try!

On the first day of March, Chris from an industrial solar energy company in the United States sent an inquiry about the hydraulic check valves. This is the first email from Chris to AAK. I'm not sure where she learned about AAK and got the email address. After further communication, we knew that she wanted to purchase total 1,100 hydraulic check valves of two styles. The next day, she sent the detailed drawings and working condition requirements of the hydraulic check valves to be purchased.

Chris needed us to quote urgently. She has contacted many hydraulic check valve manufacturers, but the lead time can not meet her requirements, she hoped that AAK hydraulic valve can ship as soon as possible. AAK engineer analyzed her hydraulic check valve drawings and working condition requirements, and soon matched the production procedure in AAK database. Coincidentally, this is the same as the hydraulic check valve purchased by one of our Indian customers, but only the sealing ring is different. Every time, the Indian customer always needs goods urgently, and the quantity is sometime large and sometime small, so we often produce some flexible stocks to meet the immediate demand of this Indian customer.

After receiving her hydraulic check valve drawings and working condition requirements, AAK offered the price and 7-day delivery time on the same day. Unexpectedly, Chris sent us the bank slip for the full payment. In addition to surprise, we realized that this customer were in urgent need of this batch of hydraulic check valves. We arranged to send approval samples immediately, but the customer said that it was not necessary to send the samples for approval, because the drawing parameters of the hydraulic check valve provided by AAK were consistent with their needs. She hoped that we can change the sealing rings and air freight the goods via TNT as soon as possible at her expense. It is our principle that if customers treat us with A, we will reward them with A + +. Our workshop organized people to replace the sealing rings of hydraulic check valves immediately, and purchased the master cartons as soon as possible, and shipped it in 3 days. When we sent the shipping photos and airway bill of the hydraulic check valves to the customer, she used 3 thanks to end the purchasing of the hydraulic check valves.

Without seeing the samples, but advance the full payment directly when quote is just received, which is the first time I met. Although it is only a small order of more than 5,000 US dollars, behind it is the customer's trust in AAK hydraulic valve. In this era, the most expensive thing is not gold and diamonds, but trust. Once the problem of trust is solved, business is a natural thing. All things that can enhance trust should be done more and desperately, which is what AAK hydraulic valve has always insisted on doing. If you do something to enhance trust, you don't worry about having no customers.

AAK hydraulic valve builds confidence in good times and combs quality in bad times. The more we face uncertainty, the more we should insist on doing the right thing and try our best to enhance trust.

AAK hydraulic check valve is not only fast, but also stable. You are welcome to give it a try

On the first day of March, Chris from an industrial solar energy company in the United States sent an inquiry about the hydraulic check valves. This is the first email from Chris to AAK. I'm not sure where she learned about AAK and got the email address. After further communication, we knew that she wanted to purchase total 1,100 hydraulic check valves of two styles. The next day, she sent the detailed drawings and working condition requirements of the hydraulic check valves to be purchased.

Chris needed us to quote urgently. She has contacted many hydraulic check valve manufacturers, but the lead time can not meet her requirements, she hoped that AAK hydraulic valve can ship as soon as possible. AAK engineer analyzed her hydraulic check valve drawings and working condition requirements, and soon matched the production procedure in AAK database. Coincidentally, this is the same as the hydraulic check valve purchased by one of our Indian customers, but only the sealing ring is different. Every time, the Indian customer always needs goods urgently, and the quantity is sometime large and sometime small, so we often produce some flexible stocks to meet the immediate demand of this Indian customer.

After receiving her hydraulic check valve drawings and working condition requirements, AAK offered the price and 7-day delivery time on the same day. Unexpectedly, Chris sent us the bank slip for the full payment. In addition to surprise, we realized that this customer were in urgent need of this batch of hydraulic check valves. We arranged to send approval samples immediately, but the customer said that it was not necessary to send the samples for approval, because the drawing parameters of the hydraulic check valve provided by AAK were consistent with their needs. She hoped that we can change the sealing rings and air freight the goods via TNT as soon as possible at her expense. It is our principle that if customers treat us with A, we will reward them with A + +. Our workshop organized people to replace the sealing rings of hydraulic check valves immediately, and purchased the master cartons as soon as possible, and shipped it in 3 days. When we sent the shipping photos and airway bill of the hydraulic check valves to the customer, she used 3 thanks to end the purchasing of the hydraulic check valves.

Without seeing the samples, but advance the full payment directly when quote is just received, which is the first time I met. Although it is only a small order of more than 5,000 US dollars, behind it is the customer's trust in AAK hydraulic valve. In this era, the most expensive thing is not gold and diamonds, but trust. Once the problem of trust is solved, business is a natural thing. All things that can enhance trust should be done more and desperately, which is what AAK hydraulic valve has always insisted on doing. If you do something to enhance trust, you don't worry about having no customers.

AAK hydraulic valve builds confidence in good times and combs quality in bad times. The more we face uncertainty, the more we should insist on doing the right thing and try our best to enhance trust.

AAK hydraulic check valve is not only fast, but also stable. You are welcome to give it a try

Yesterday morning, a colleague complained to me that he couldn't stand the Indian hydraulic valve customer. After communication, I learned that this old customer had to bargain every time when he placed the reorders, and he had asked for price reduction for 3 times. This time, this colleague couldn't bear it. There is an old Chinese saying that there is no need to bear it anymore. It seems to explain the legitimacy of the actions: I can't stand it. I have to do so. In fact, what you do when you can't bear it, whether it's right or wrong, good or bad, you shouldn't do it.

What is the goal of AAK hydraulic valve? Isn't there more and more choice in the hydraulic valve industry? Specific to everyone of AAK hydraulic valve is to avoid making themselves have no choice. To be unbearable is to admit that you have fallen into a state of no choice.

Think about my colleague carefully. Why didn't he have a choice? People often ask: is effort more important or choice more important? It is said that when you have a choice, choice is more important. If my colleague can insist on marketing like other colleagues and has more than 3 old customers of hydraulic valves, is there a better choice? And when you have no choice, hard work is important. In terms of specialty, adhere to the output of professional contents in hydraulic valve, and move towards the direction of technology and process; In terms of service, stick to the direction of trust. Combine the two, you don't need to worry about having no choice. In fact, there is another extension of this answer, that is, what is the purpose of efforts? Just to make yourself more selective. What is the AAK hydraulic valve effort for? In order to make ourselves have more choices to do a good job of hydraulic valves.

AAK hydraulic valve adheres to the choice of subdivided target customers, and serves customers well with AAK hydraulic valve's distinctive advantages or distinctive technical features. AAK hydraulic valve adheres to a group of people, a lifetime and one thing, so that each user can make good use of AAK hydraulic valve. AAK hydraulic valve adheres to the principle of integrity, does a good job in the business of AAK hydraulic valve, and sincerely treats every customer who purchases hydraulic valves from AAK. Let more customers use good hydraulic valves with real materials without wasting money.

I told my colleague that you should treat the client as your girlfriend. For example, she offered to break up with you today, and you gave her your last speech. If she understands your mind, she will come back. If she doesn't come back, it means she's not suitable for you.

He sent an email to the Indian hydraulic valve customer: when you asked a price reduction of this hydraulic valve for the first time, and I gave you 5%. AAK treats the quotation of each hydraulic valve in good faith, and does not falsely quote the price, and does not arbitrarily quote the price, which is an expression of dishonesty in itself. For the second time you reduced the price of this hydraulic valve, I gave you 2%. This 2% is my business commission, that is to say, for the second order of hydraulic valves, I serve you free of charge. I gave you another 2% of your third hydraulic valve order. I told the finance that I would pay for the 2% price difference myself, because I had to complete the annual business key performance indicators (KPI). Your 4th order of hydraulic valve will cut my price again. I not only don't earn a penny, but also pay for the keeping of an unprofitable business. I have to eat, too. I have no food to eat. How can I serve you? I hope you can take care of me to eat, so I have the confidence to serve you well.

Surprisingly, today, this Indian hydraulic valve customer placed an order at the original first price.

AAK hydraulic valve is not only different, but also miracles. You can also have a try.

AAK introduced HARDINGE precision CNC lathe, and the machining surface accuracy of hydraulic relief valves was improved to 0.3μm, which can not be reached by nearly 95% of hydraulic valve manufacturers in Ningbo. After comparing the parameters of different factories, a German customer found that only AAK meets their requirements for PO confirmation.

Fred, a hydraulic valve purchaser from Brandenburg, Germany, is in urgent need of purchasing a hydraulic relief valve for a forklift recently. This hydraulic relief valve has a very high precision requirement. The machining surface roughness of conventional valve is generally around 0.8μm, but this one needs to reach 0.3μm, the precision of which is nearly 3 times higher. Fred contacted all his hydraulic relief valve manufacturers, but none of them could achieve an accuracy of 0.3μm. It is difficult for Fred to find a solution.

Fred decided to try through B2B. He contacted nearly 10 hydraulic relief valve manufacturers online. Two said they could try it, but they are not sure for 100% success, because they had never made such a high-precision hydraulic relief valve. It seems that Fred has no good choice and asked them to try samples. Three weeks later, due to the insufficient accuracy and stability of the hydraulic relief valve, the customer did not approve the samples from these two manufacturers and asked Fred to re-proofing. Fred had to find other new manufacturers of hydraulic relief valves.

Fred saw AAK hydraulic valve on B2B and left a message on our website (www.aakindustry.com): can you make the hydraulic relief valves with accuracy of 0.3μm? I noticed that he browsed AAK website for about half an hour. He should have encountered problem on accuracy. We reply that it depends on the parameter index of the hydraulic relief valve and the working condition requirements. After receiving his drawing, our engineer confirmed that we can reach the accuracy of 0.3μm of this hydraulic relief valve and there may be no 3^rd factory who can meet this requirement in Ningbo. If any doubt, we can make samples to test directly.

Fred accepted AAK suggestion and paid a sample fee of $1,300.00. Two weeks later, AAK sent the samples of the hydraulic relief valve. After testing, Fred informed that AAK hydraulic relief valve was praised by the customer. Not only did the accuracy of the machined surface meet the standard, but the upper and lower deviation was also very small. While the samples of hydraulic relief valve from last two manufacturers are not stable, some with 0.3μm, some with 0.4μm, or even 0.6μm. Only after comparison, the customer realized that AAK hydraulic relief valve is really high precision, so they have to admire it.

The roughness accuracy of the machined surface within 0.3μm is always the hard index of AAK. We have introduced the American HARDINGE precision CNC lathe, which gives us the most powerful support in terms of accuracy. The spindle speed of the machine tool is up to 6000r/min, the radial runout of the spindle ≤ 0.0008mm, the positioning accuracy (X/Z) ≤ 0.005mm/0.008mm, the repeated positioning accuracy (X/Z) ≤ 0.003mm/0.005mm, and the roughness of the machined surface Ra ≤ 0.3μm. Turning roundness ≤ 0.4μm. Turning cylindricity ≤ 0.1μm. At the same time, we upgraded its fixture, with large clamping area and stable processing. Although there are no 2 identical leaves in the forest, there are 2 hydraulic relief valves with the same precision in AAK.

AAK hydraulic relief valve with accuracy up to 0.3μm, you can also have a small try!

Over the past 2 years, Peter, who is from ST hydraulic equipment manufacturing company, has been very smooth in purchasing hydraulic valves in Ningbo. He and I often have some communication via emails, but there is no cooperation yet due to the high price. A batch of hydraulic directional control valves he purchased last year had problems. Six months after shipment, the customer found that the hydraulic system could not operate because the valve spool of the hydraulic directional control valve was stuck, and asked ST company to solve it within 30 days. Peter communicated with the original manufacturer of this hydraulic directional control valve but no gain. The manufacturer thought that the hydraulic oil was not clean or there were problems in installation, because their hydraulic directional control valves passed the test before shipping.

The boss asked Peter to check with other manufacturers and be sure to solve customer complaints within 30 days. Most manufacturers advised that they have no existing stocks that are exactly same as this hydraulic directional control valve, and they are also not willing to produce it especially for such a small quantity. Some manufacturer advised that they can customize it for Peter, but it will take more than 50 days and also costs a lot. Two weeks passed but still no solution, which makes Peter haggard.

Peter thought of AAK and emailed us to ask if there was a hydraulic directional control valve of the same model, and the faster the delivery, the better. After reading this email, I understood that there was a problem with the hydraulic directional control valves purchased by Peter. After further communication, I learned that the valve spool of the hydraulic directional control valve he purchased this time was easy to be stuck and complained by customer. According to Peter's drawings and working condition requirements, AAK engineers conducted comparative analysis, and later found that the control principle and size of this hydraulic directional control valve are consistent with one of AAK's existing stock, except that the design method is different.

I immediately answered Peter that AAK had 100 hydraulic directional control valves in stock. At the same time, I emailed the drawings of AAK hydraulic directional control valves and asked Peter and his engineers to verify whether AAK hydraulic directional control valves met their requirements. The next day, Peter said that their engineers thought AAK hydraulic directional control valve could not be used because some designs were fundamentally inconsistent. I suggested to him: if you want to solve the customer complaint within 30 days, perhaps purchasing this hydraulic directional control valve is the best choice. To believe in the analytical ability of AAK, you should try our hydraulic directional control valves first. If it really cannot be used, AAK shall bear all expenses for goods return. Peter has no choice and asked AAK to send 24 hydraulic directional control valves.

A week later, Peter said that the hydraulic directional control valves sent by AAK was not only easy to install, but also fully met the working requirements of their company's hydraulic equipment. Their engineers said twice in a row: incredible, incredible. His customer is very satisfied with this quick after-sales. Peter spent 2 weeks looking for the hydraulic directional control valves, but no gain. Why did AAK finish it 1 week after analysis? That's because:

AAK hydraulic directional control valve has two absolute advantages and has already surpassed its domestic counterparts:

1. AAK has a high-precision CNC machining center imported from Switzerland and various independent fixtures upgraded and refitted by itself, which eliminates human errors and avoids valve spool stuck and other faults.

2. The independent professional R & D team, combined with unique R & D technology, has realized the personalized customization demand of hydraulic directional control valve, which can not be achieved by 95% of domestic peers in China.

Peter told me privately that his boss asked him to send samples of their other hydraulic directional control valves previously purchased elsewhere to AAK for quotation. Even if the price is a little expensive, they should still choose more stable hydraulic valves from AAK. They not only admire AAK professional analysis ability, but also AAK ability to solve difficulties for customers in time.

AAK hydraulic directional control valve is professional and attentive. It can solve problems for you in time. You can also have a small try.

Some time ago, an old customer in the United States needed us to sign a confidentiality agreement to develop a new hydraulic relief valve. The drawings of the hydraulic relief valve were sent 1 month after the confidentiality agreement was signed. The customer requested that if we were not able to develop it, they would witness us destroy the drawings and documents of the hydraulic relief valve by video. It's the first time for this customer to be so formal.

After receiving the drawings of hydraulic relief valve, we knew that it was to match with a set of aerospace equipment developed by a world top 500 enterprise in the United States. AAK engineers reviewed the drawings for 3 days and still didn't write the sample program. This hydraulic relief valve is not only small in size, but also has material requirements, machining accuracy requirements and use frequency requirements that exceed the parameter requirements of the hydraulic relief valves we have seen. We estimated that the overall development cost will not be less than 20,000 US dollars, and the success rate will be about 10%.

When we mentioned the development cost and difficulty to the customer, the customer's answer is: now I'll give you 30,000 dollars and give you 1 year of time. If the development is successful, you can wait for the order of hydraulic relief valve. If the development fails, this $30,000 will be deducted from the payment for AAK in the future. That’s to say that the customer will prepay for the development cost of the hydraulic relief valve, but if it fails, we will need to refund it by deducting from the future payment gradually.

I did not hesitate to reply to the email and was willing to try to develop this hydraulic relief valve. Our engineer joked that next, it is estimated that he will lose a layer of skin. If it fails, it may be not only a waste of tens of thousands of dollars in development costs, but also the loss of his own job. I told him that the success of the hydraulic relief valve development would be counted as the contribution of the technical team, and the failure would be counted as mine, because I can't fail to live up to the customer's support for our development.

Some people in AAK can not understand how this could be a kind of support. Maybe he didn't think about a question, that is, what would the mentality of the technical team be without customer support? Behind these are two completely different ways of thinking. One is that if you haven't done it yet, think about failure first, think about whether there is a bottom plan first, and if not, don't do it. There is also a way of thinking, which is to think about how to start first. If conditions permit, start working first.

The difference between these two ways of thinking is not just the difference between conservative and radical, but whether people are the key factor to create value. With the starting money, the hard work of the technical team and the best logistics support of AAK, the probability of successful development of hydraulic relief valve may be high.

AAK hydraulic relief valve, no matter how difficult it is, just do it first. You are welcome to give it a try.

Over the past year, Jerome has purchased more than 20 batches of different types of hydraulic valves of test orders from more than 10 hydraulic valve manufacturers in Ningbo, including AAK. Finally, he chose to place the large order of hydraulic flow control valves with AAK, because the packaging details of AAK made him think that the quality of AAK hydraulic flow control valves is the most reliable.

Jerome is from a hydraulic equipment company in Italy. He sent an email last week to purchase 2,500 hydraulic flow control valves. I was surprised because Jerome always purchased small orders before. After e-mail communication, it was learned that Jerome has purchased more than 20 batches of different types of hydraulic valve test orders from more than 10 hydraulic valve manufacturers in Ningbo in the past year. There are always some problems, such as time delay and communication delay, especially the packaging of the test order was criticized by his boss.

The quality defect of the hydraulic flow control valves purchased last time was complained to the boss by the company's installation engineer. During the assembly process, the installation engineer found that several hydraulic flow control valves could not be screwed into the socket at all, mainly due to obvious bumps at the threads of the hydraulic flow control valves. Jerome requires the original hydraulic flow control valves to be replaced. The manufacturer believes that each hydraulic flow control valve has been pressure tested before leaving the factory and shipped only after it is qualified. The bump was caused by the carelessness of their installers. The installer showed the boss of the damaged package photos to reveal the reason. Some of the packing boxes of the hydraulic flow control valves are deformed, some are broken, and even some of the inner packing poly bags are broken. Those hydraulic flow control valves with bumps were improperly packaged and protected during transportation. Jerome is helpless because of the factory's prevarication. Fortunately, this is just a trial order.

Jerome thought of the packaging details of each trial order of AAK. Only the packaging of AAK was different from that of other hydraulic valve manufacturers in Ningbo. At that time, it was only the trial order that he didn't pay attention to the packaging details of AAK. Now he saw the problems caused by improper packaging during transportation from other hydraulic valve manufacturers. He realized that only each trial order of AAK, the packaging received was intact.

Later, I told him that because the quantity of trial orders was small, most of them were delivered by express, and it is unavoidable that the parcels will be bumped. AAK will inspect each hydraulic flow control valve separately when leaving the factory. Only the qualified hydraulic flow control valves are put into the bubble bag and then into the corrugated box with the right size, so that there is no extra room for the hydraulic flow control valves to move in the inner package. Then put several small cartons into customized 5-layer corrugated cartons, so that there is no extra space around, which can not only save the transportation cost of customers, but also avoid the collision of hydraulic flow control valves during the transportation. Then, the outer box is reinforced with herringbone packing belt, and pasted with the mark of fragile and handle with care to remind the express personnel. For express delivery exceeding 10kgs, wooden boxes are used for protection. Usually, it is difficult for peers to think of these small details in the packaging of the trial order, and AAK has always pay attention to even the small details of all links of the hydraulic flow control valves.

AAK hydraulic flow control valves, care about every small detail, you are welcome to give it a try!

George comes from a hydraulic valve company in Germany. He likes to choose old suppliers to place orders. Some time ago, he placed an order of hydraulic pressure control valve with machining allowance of 0.3mm with an old supplier. After 3 proofing, his customer still did not approve the samples of the hydraulic pressure control valve. George was very angry. Before ordering this hydraulic pressure control valve, he confirmed the parameters with the manufacturer several times, especially the machining allowance of 0.3mm. The manufacturer guaranteed no problem. Unexpectedly, the accuracy error of the hydraulic pressure control valve sample was 10% higher, and even after revising samples for 3 times, it still can not meet the machining allowance of 0.3mm.

George has to face the technical shortcomings of the old manufacturer, the sample pushing of the customer, and the situation of no suitable hydraulic pressure control valve manufacturer to make samples. He contacted the all the hydraulic valve manufacturers cooperated in the past, but none of them was able to make a hydraulic pressure control valve with a machining allowance of 0.3mm. He kept looking for a new hydraulic pressure control valve manufacturer online and came across AAK hydraulic valve on B2B. George left a message on our website I saw AAK article introducing the hydraulic valve with machining allowance of 0.3mm. We have a hydraulic pressure control valve requiring machining allowance of 0.3mm. Can you sample it?

For those customers who directly require to make samples like this, basically, they encountered the sample failure from other hydraulic pressure control valve manufacturers. After communication, we know that his old supplier has failed to deal with the 0.3mm finishing hydraulic pressure control valve samples for 3 times. After checking George's hydraulic pressure control valve drawings and various parameter descriptions, AAK engineers confidently informed that the sample could be successful at one time. George may think that only AAK can help him solve the problem. He directly paid a proofing fee of $1,200.00 and asked us to send the hydraulic pressure control valve samples within 3 weeks. We appreciated George's frankness and asked the workshop to cooperate fully. After 15 days, we successfully sent the samples of hydraulic pressure control valves. On the third day after George received the samples, he told us that the machining accuracy of AAK hydraulic pressure control valve not only met the requirement of machining allowance of 0.3mm, but also increased by 5%, which made him admire very much.

In order to ensure the accuracy of finish machining size allowance, the heat treatment process is the most critical step. At present, most hydraulic pressure control valve manufacturers adopt local quenching, the workpiece heat treatment process is not easy to control, and most of them are easy to deform. As early as 6 years ago, AAK adjusted local quenching to overall quenching. At the same time, vertical flow treatment must be required for the hoisting mode in the process of quenching and tempering, so as to minimize the influence of the tissue stress and thermal stress of the workpiece heat treatment on the deformation, so as to meet the dimensional allowance requirements of finish machining.

The next day, George decided to cancel the order of the hydraulic pressure control valves with the old manufacturer and told me that AAK hydraulic valve is his old supplier now. Maybe he meant to tell me that his hydraulic pressure control valves will be purchased from AAK in the future.

AAK hydraulic pressure control valves, the finish machining accuracy is 5% higher than the requirements of German customer. You can also have a small try!

One morning last month, Antonio emailed us that there was a problem with AAK hydraulic directional control valves purchased some time ago, and a problem was found in the factory commissioning of the bending machine. The starting pressure of the hydraulic system of the bending machine will suddenly increase. Their engineers think it is caused by the instability of the hydraulic direction control valves and ask us to replace it. I'm totally confused. Because this hydraulic directional control valve is produced and inspected in full accordance with the parameters provided by Antonio, and the parameters of the hydraulic directional control valve are approved in the commissioning stage of the bending machine.

Antonio is from Prada Nargesa company in Spain. He has cooperated with AAK on hydraulic directional control valves for several years. This is the first complaint from him. In the sample stage, Antonio informed that this hydraulic direction control valve was used in the hydraulic system of the bending machine produced by his company. It was noted that the bending tonnage was required to be 400 tons, the maximum bending length was 6 meters, and the bending accuracy was +/- 0.3°. The pressure and accuracy requirements of the hydraulic direction control valve were very high. After our internal discussion, we found the problem strange.

AAK engineer asked Antonio to send a video of the working condition of the hydraulic system of the bending machine for us to check what the problem is. Through the video, we found that there was a problem about the installation position of the needle valve of the integrated valve block of the hydraulic system and the position of the hydraulic directional control valve. It was preliminarily judged that the pressure regulation mode of the hydraulic system of the bending machine is not correctly designed, and this hidden danger will come out after more than 8 hours of continuous test run. But the designers of their company didn't agree with our proposal and thought we were shifting the responsibility.

I suggest Antonio give us 30 days to redesign the integrated valve block. If there are still problems after installation, AAK is willing to bear all costs. Considering that these bending machines are in a hurry to ship, it will take longer time if purchasing new hydraulic directional control valves, moreover it is not guaranteed that the new hydraulic directional control valves will be no problem, Antonio reluctantly agreed with AAK proposal. After 25 days, AAK sent out the integrated valve block with hydraulic directional control valve, which was installed and debugged for more than 8 hours. Everything of the bending machine was normal, and their designers had to affirm it.

AAK professional engineers designed the pressure regulation of the hydraulic system of the bending machine as a modular type, and rearranged the position of the needle valve and the hydraulic direction control valve, so as to provide the proportional regulation function. At the same time, the unloading circuit is simple and reliable. The safety pressure valve is connected in parallel in the lower chamber of the oil cylinder to form a double safety circuit to prevent the abnormal rise of the oil pressure in the lower chamber from damaging the oil cylinder and pipeline, so as to ensure the safety of the equipment.

Antonio told us privately that a similar situation happened the year before last. The hidden danger of the original design of the equipment is simply considered to be the problem of the supplier's hydraulic directional control valve. Even they changed 3 manufacturers of hydraulic directional control valves, problem was still not solved.

AAK hydraulic directional control valve can give technical support that peers can't give. You are welcome to have a try!

Recently, the PO quantity of AAK hydraulic pressure regulating valves has suddenly increased. Whether it is the trial order or the daily order of wholesale customers, after the delivery date of the hydraulic pressure regulating valves is determined, the customers begin to pay. Brooke is my old customer. We have cooperated for more than 1 year. Most of his orders are hydraulic pressure regulating valves. Yesterday, Brooke placed a new test order and advanced the full amount. I asked him why he chose to give it to AAK.

Brooke replied to us as follows:

1. AAK gives as much as it promises, unlike other hydraulic valve manufacturers who over promise but can't fulfill the commitment.

2. In the technology of hydraulic pressure regulating valves, I trust AAK most.

3. In terms of service details, AAK is the best in my current hydraulic valve supply system.

My first business with Brooke was also the hydraulic pressure regulating valve. The first PO was a small order for the hydraulic pressure regulating valve. The second time, there was an inquiry for a large number of hydraulic pressure regulating valves, and we also made samples, but Brooke told me that because the price of AAK was 17% higher than that of another hydraulic pressure regulating valve manufacturer in Ningbo, so he purchased it from another factory. I remember that I joked: if there is no problem with the hydraulic pressure regulating valves you purchased, I will admire you. At that time, he needed a hydraulic pressure regulating valve with high pressure parameters. There may not be a third hydraulic pressure regulating valve manufacturer in Ningbo who can meet this parameter.

As expected, Brooke said in an email last month that he was trapped by another manufacturer of hydraulic pressure regulating valves in Ningbo. After the goods arrived, the workshop technicians installed the hydraulic pressure regulating valves and began to increase 20% of the rated pressure for pressure test. After 24H, some hydraulic pressure regulating valves leaked. However, in the approval stage, the samples of hydraulic pressure regulating valves from this factory were up to standard. Brooke contacted the manufacturer of the hydraulic pressure regulating valves, but manufacturer replied that there was no stock to replace them. Brooke replaced the hydraulic pressure regulating valves with samples from AAK originally, and there was no leakage problem under the same working conditions. Finally, AAK adjusted the production schedule specially and produced new goods for him, which completely solved the leakage problem of the hydraulic pressure regulating valves.

I told Brooke that to meet the requirements of this high-pressure working condition, special attention needs to be paid on not only the material selection, but also the material heat treatment and workpiece processing accuracy. More importantly, each hydraulic pressure regulating valve should pass the high-pressure test bench. AAK has a self-developed high-voltage test bench, which can accurately test each hydraulic pressure regulating valve to ensure 100% qualification. There may not be a third one like us in Ningbo. In the hydraulic valve industry, customers who leave due to price may still come back. Most customers who leave due to service will not turn back, and customers who leave due to quality will never come back. AAK hydraulic pressure regulating valves have so many repeat customers up to now, it is precisely because AAK always puts the quality requirements at the first place, strictly controls every detail, and does not ship until it passes inspection 100%.

AAK hydraulic pressure regulating valves, the parameters are guaranteed to meet the standard, pay close attention to service details. You are welcome to have a small try!

Mateo comes from a Canadian company specializing in food hydraulic equipment. The hydraulic relief valves he needs are not to be used in traditional machinery or equipment. He pays special attention to the cleanliness of the hydraulic relief valves. Last week, he sent an email saying that he would order 2,000 hydraulic relief valves at one time, because the customer placed a large order for the equipment newly developed by his company at the end of last year, and his boss repeatedly stressed that he must purchase from AAK only.

Mateo gave AAK a trial order of 20 hydraulic relief valves in the second half of last year, and specifically noted that the parameters of this hydraulic relief valve should not be careless, because it is related to the sales of their new equipment. At the same time, pay attention to the cleanliness of the hydraulic relief valves, because this equipment is used in the food assembly line. I replied to him at that time that you can rest assured of the quality of AAK hydraulic relief valves. You can compare with several manufacturers at the same time, and let the results to speak. Several months after the samples of hydraulic relief valves were sent, Mateo didn't reply. During this period, we also sent several emails to follow up, but no any news, it's like a stone sinking into the sea. At that time, I thought he found a better manufacturer than AAK hydraulic relief valves. I didn't expect that 6 months later, Mateo immediately placed the big order of the hydraulic relief valves, which really surprised me.

I asked Mateo why your boss decided to place such a big order for AAK hydraulic relief valves. Mateo said that during sample stage for the hydraulic relief valves, they selected 6 manufacturers and started installation and commissioning after receiving the samples. Except for one hydraulic relief valve manufacturer, the parameters of the other 5 manufacturers were qualified. They decided to choose a hydraulic relief valve with the lowest price to test the machine. The hydraulic relief valves stuck in 3 months, affecting the operation of the equipment. After disassembling the valve body, the engineer found that there was fine sand like dirt on it, which should be caused by dust pollution on the hydraulic relief valves. The manufacturer believes that the dust pollution on the hydraulic relief valves is caused during transportation, which has nothing to do with them. The engineer suggested using AAK hydraulic relief valves to test the machine instead.

In more than half a year of debugging, there was no stuck problem. The boss said that although the price of AAK hydraulic relief valves was a little higher than that of other factories, the details of their dust-free packaging were amazing. Compared among 6 hydraulic relief valve manufacturers, only the packaging of AAK surprised everyone.

When we know the equipment is to be used in the food production line, we know that the cleanliness of the hydraulic relief valve is strict. We did these things:

1. The components of hydraulic relief valves are cleaned with ultrasonic cleaning equipment after processing;

2. In the assembly workshop, automatic induction setting is adopted for the entrance and exit, and workers are not allowed to go in and out unless necessary, so as to avoid dust pollution of the packaging site.

3. After the hydraulic relief valves pass the quality inspection, put each one into a single layer thickness of 0.12mm polybag and seal it.

4. Put it into the injection molded PP plastic box, and then in inner packaging and outer packaging. 100% dust free protection during transportation.

AAK hydraulic relief valves, dust-free packaged, used in food equipment, welcome to have a small try!

Carter comes from an excavator manufacturing company in Italy, and the purchase of hydraulic needle valves has been smooth in recent years. At the beginning of last year, an excavator sold by their company for less than 6 months was complained by customer. The boom of the excavator falls too fast due to its own weight, which is easy to cause danger. Their technician found that there was a problem with the hydraulic needle valve of the hydraulic system. There were obvious wear marks at the contact point between the valve spool and valve seat of the hydraulic needle valve, which was easy to leak. The leakage of the hydraulic needle valve will cause the oil saving and speed limiting circuit of the hydraulic cylinder to be uncontrollable. The boss was very angry that the equipment sold for only half a year was complained and asked Carter to find out the cause of the hydraulic needle valve problem and solve it.

Carter contacted the original manufacturer of the hydraulic needle valves and requested to replace the hydraulic needle valves. The manufacturer said that the service life of hydraulic needle valves under 450bar working condition is basically 6 months. The only way to solve this complaint is to replace the hydraulic needle valves every 6 months. Such reply made Carter speechless, because his customer would not accept the high-frequency replacement of hydraulic needle valves, which not only brought a bad user experience, but also the after-sales cost was not cheap. Carter contacted all of his hydraulic needle valve suppliers, and they all replied that they were not sure to achieve a hydraulic needle valve with a service life of 1 year under the working condition of 450bar.

When browsing the website, he found AAK and left a message on the website: How long is the service life of hydraulic needle valves with pressure resistance of 450bar? We replied directly for 1 year or more. The next day, he told the problems encountered in purchasing hydraulic needle valves at the beginning of last year in detail. After receiving the drawing of the hydraulic needle valve, we found that the hydraulic needle valve needed by Carter has much higher requirements than the ordinary hydraulic needle valves. We replied that AAK will select specific materials for samples, which can ensure that the hydraulic needle valves can be used for more than 1 year under normal conditions. If possible, he can directly test the samples.

One month later, AAK sent 24 hydraulic needle valve samples. A year later, Carter sent an email saying that the excavator with AAK hydraulic needle valves still have not encountered boom problem yet. Among all of his hydraulic needle valve suppliers, only AAK has a service life of more than 1 year.

The surface treatment of the valve body of AAK hydraulic needle valves adopts electromagnetic induction heating. Its main advantages are fast heating speed, light oxidation and decarburization of the workpiece surface, and the surface hardening layer can be adjusted according to needs, which is easy to control. The hardened layer has fine martensite structure and high hardness, strength and toughness. After surface quenching, the surface of the workpiece has large compressive internal stress, and the fatigue breaking resistance of the workpiece is high. Using induction heating surface quenching, the number of fatigue cycles under design load is about 10 times higher than that with ordinary quenching and tempering treatment.

AAK hydraulic needle valves, special material selection, high pressure resistance and durability, welcome to have a small try!

AAK, as a manufacturer of producing hydraulic valves, has been doing ODM hydraulic valves for 10 years for 3 of the world's top 500 in the industry. In the years of labeling these big brand hydraulic valves, the overall quality of the factory has improved significantly. The operation of each workshop is standardized, the quality control process of hydraulic valves is strict, and the self-implementation is more strict than the ISO certification system, being meticulous in making hydraulic valves. All of these are valuable assets for big brand ODMs.

In cooperation with these big brand hydraulic valves, AAK has formed a strict process flow, because of them, there is the growth of AAK hydraulic valves. The strength of the factory has improved, and it is natural for the market to respond. I still remember that 10 years ago, I participated in the Ningbo hydraulic valve industry seminar. An old engineer said at the meeting: "It is easier for factories to succeed in making more difficult hydraulic valves". This seems to be in line with our traditional experience: No cross, no crown. That sounds right, but it's not true. Because there is also a contrary saying called "follow the trend". If a hydraulic valve manufacturer does the right thing, it is not only easy to succeed, but also not difficult.

The experience of AAK hydraulic valves over the years is the same. If some styles of hydraulic valves are easy to do, you do not feel particularly difficult and can get help everywhere, they are more hopefully to be successful. I think that if you put the difficulty and success of the hydraulic valves together, and want to find the causal relationship between them, this idea itself has a problem. If you put the difficulty of hydraulic valves and the growth together, it may be right. The success of making a hydraulic valve with appropriate difficulty is not certain, but it will lead to our growth for sure. If we make this hydraulic valve, it will be helpful to our technological growth, and AAK will do it without hesitation.

Ten years ago, China's hydraulic valves were almost supplied to some domestic manufacturers of mechanical equipment, perhaps because of the simple process or the trend of hydraulic valve manufacturers. At that time, AAK hydraulic valves began to be tested by HydraForce. At that time, it was difficult to find a third manufacturer who could understand English hydraulic valve drawings in Ningbo. Five years ago, international equipment manufacturers, industrial manufacturers and hydraulic valve brands began to purchase hydraulic valves from China. AAK hydraulic valve was the first to try tomato.

AAK hydraulic valve has been doing ODM hydraulic valves for 3 of the world's top 500 in the industry for 10 years. The quality control process of hydraulic valves is strict, which is more strict than the ISO certification system. It is meticulous in making hydraulic valves. However, AAK hydraulic valve has never relaxed its requirements, stuck to details and increased research and development, because we know that when the growth of hydraulic valve customers exceeds that of AAK, AAK hydraulic valve will be abandoned slowly. Therefore, we must run in front of customers, lead customers, and then help customers make money.

AAK hydraulic valve, the choice of international hydraulic valve brands, you are also welcome to have a small try.

Hudson is an old purchaser of LARZEP company in Spain. He cooperates with us on are some non-standard hydraulic sequence valves, and often discuss some difficult and miscellaneous problems of hydraulic sequence valves with us. In the second half of last year, their company developed a machine tool hydraulic system, which uses the hydraulic sequence valves to implement the device of positioning first and then clamping. In order to save development time, Hudson purchased directly from Spanish hydraulic sequence valve manufacturers. According to the hydraulic sequence valve drawings provided by Hudson, the factory delivered 20 hydraulic sequence valve samples in 30 days. After the test run, it was found that the positioning clamping device reacted slowly after the machine tool was started. Check the oil circuit and components of the whole hydraulic system one by one, and there is no abnormality. Their engineers speculated that there was a problem with the hydraulic sequence valves.

Hudson contacted the original factory. The manufacturer fed back that the samples of hydraulic sequence valves were completely produced according to the drawings provided by LARZEP company, and the dimensional accuracy met the requirements. Their engineers tested the hydraulic sequence valves separately and there was no abnormality. Hudson's team explored for 2 days and determined that there was a problem with the design of the hydraulic sequence valves. Hudson contacted AAK because the hydraulic sequence valve problems encountered several times before were solved by AAK. According to his fault description, drawings of hydraulic sequence valve, working parameters of hydraulic system of machine tool and video of test run, AAK engineer did find the problem in the design of hydraulic sequence valve.

AAK engineer's suggestion is to change the design mode of the hydraulic sequence valve to maintain a minimum "pilot pressure" in the starting circuit and "fully open" when it is higher than the set pressure. This feature can effectively reduce the throttling loss of the system under the working pressure and make the clamping and positioning system of the machine tool sensitive. Hudson team had to stop the machine test and let AAK immediately test the sample according to AAK design recommendations.

After 30 days, AAK sent 20 hydraulic sequence valve samples and provided our working schematic diagram. Hudson team installed and commissioned the machine tool after receiving it, and the machine tool was continuously tested for 48H. The reaction of the positioning and clamping device of the machine tool has always been normal. Hudson emailed us that AAK newly designed hydraulic sequence valve was more reliable than their native Spanish ones, and their engineers were surprised by AAK design ability. Thanks to the help of AAK, they succeeded in the test run.

Hudson privately told us to wait for the email for the annual order of the hydraulic sequence valves, their team is confident that this machine tool will sell well. His boss is very satisfied with their performance in promoting the new equipment this time.

AAK hydraulic sequence valve helps customers make money. You are welcome to give it a try!

Patrick and I know each other at the PTC exhibition in Shanghai. He has worked in HAENCHEN hydraulic equipment company in Germany for a long time. The first thing he said when he saw me was that “I was attracted by the slogan "Hydraulic valve manufacturer of the world's top 500 companies" on your AAK booth”. We talked about the hydraulic threaded cartridge valves for more than half an hour, especially introduced the difference of AAK hydraulic threaded cartridge valves on the specific details. He was surprised that the details of AAK had caught up with his local hydraulic valve manufacturers in Germany.

Shortly after the exhibition, Patrick emailed us a hydraulic threaded cartridge valve with high parameter requirements. In particular, the durability of the hydraulic threaded cartridge valve should be more than 2 million times. All quality details should be compared with their local suppliers in Germany. The drawings attached to the email indicate the detailed data and working condition requirements. AAK is required to send 12 hydraulic threaded cartridge valve samples within 4 weeks. After analysis and comparison, AAK engineers found that this hydraulic threaded cartridge valve is not only durable for more than 2 million times, but also has high accuracy requirements. In particular, the internal leakage requirement of hydraulic threaded cartridge valve is 2drops / min, which is 60% higher than the international general standard. Although the requirements are high, we are still confident. 4 weeks later, AAK sent 12 hydraulic threaded cartridge valve samples.

A month after the hydraulic threaded cartridge valve samples were sent, Patrick emailed that AAK did make him realize that it was different from other hydraulic valve manufacturers. At that time, he emailed to 4 Chinese hydraulic threaded cartridge valve manufacturers and a local manufacturer in Germany. Two of the 4 Chinese hydraulic valve manufacturers gave up directly. Only AAK and another hydraulic thread cartridge valve manufacturer confirmed to make samples. They tested and compared the sample parameters of the three factories. AAK's accuracy and durability are not only much higher than those of its Chinese counterparts, but also benchmarked with their local manufacturer in Germany. Although the quotation of AAK hydraulic threaded cartridge valve is much higher than that of its Chinese counterparts, it still has advantages over the hydraulic threaded cartridge valve purchased locally in Germany. Purchasing from AAK is the best embodiment of cost performance.

AAK hydraulic threaded cartridge valve has three absolute advantages and has already surpassed its domestic counterparts.

1. AAK has a high-precision CNC machining center imported from Switzerland and various independent fixtures upgraded and refitted by itself, which eliminates human errors and ensures the first step of accuracy.

2. AAK engineer team with more than 10 years of technical experience, independent professional research and development, combined with unique research and development technology, to select the raw materials and components according to the working conditions of customers' actual needs, realizing the personalized customization demand of hydraulic threaded cartridge valves, which can not be achieved by 95% of domestic peers.

3. AAK has been OEM for 3 Fortune 500 companies for 10 years. The quality control process is strict, and it is stricter than the ISO certification system. It never relax their requirements, stick to the details and increase R & D. Ensure that the valve spool and valve sleeve of each hydraulic threaded cartridge valve have low friction, anti-fatigue, long service life and high precision.

AAK hydraulic threaded cartridge valve has surpassed its domestic counterparts and benchmarked the local manufacturer in Germany. You are welcome to give it a try!

HIGINSON company plans to develop a new plunger hydraulic cylinder, which needs to purchase the supporting hydraulic directional control valves. Helen, who had just joined the company, stumbled when purchasing the hydraulic directional control valves. Helen has no hydraulic valve supplier and can only purchase from the original hydraulic valve manufacturer of the company. Half a month later, the engineer and technician of the company installed the hydraulic directional control valves purchased by Helen for commissioning, and the plunger hydraulic cylinder dropped intermittently with vibration and noise. The technician pointed out that the hydraulic directional control valves needed to be replaced.

Helen contacted the original manufacturer of hydraulic directional control valve. Per the manufacturer, the delivered hydraulic directional control valves met the requirements of Helen's parameters, and the accuracy also fully met the standard. As a novice, Helen was helpless, and the technician did not specifically say why to replace the hydraulic direction control valves. She tried to contact the new hydraulic directional control valve manufacturer to solve the problem.

Helen left a message on AAK website: why is the plunger hydraulic cylinder equipped with hydraulic directional control valve noisy? At this moment, we can't tell the reason. After communicating with Helen, I learned the process of purchasing this hydraulic directional control valve and the judgment of technician in their company. AAK engineers are not 100% sure that where the problem is according to the hydraulic directional control valve drawings sent by Helen, the shipment sample of the original manufacturer and the video of their technician's machine test. We are thinking if Helen, as a novice, has mistaken the type of hydraulic directional control valve? The hydraulic directional control valves can be divided into internal leakage type and external leakage type. Combined with the working conditions, this plunger hydraulic cylinder just reverses the oil outlet chamber, and the back pressure is high. If the internal leakage hydraulic directional control valve is used, there will be abnormal phenomena such as vibration or noise.

We told Helen our thinking. She really did not note to the original manufacturer that the hydraulic directional control valve is internal leakage or external leakage. I told her that AAK has ready-made samples of the external leakage hydraulic directional control valve. It is recommended to test the machine with AAK hydraulic directional control valve to see if there is still vibration or abnormal noise. A week later, Helen sent an email saying that AAK hydraulic directional control valve was installed and there was no abnormality in the test run.

Helen said privately that she contacted many manufacturers of hydraulic directional control valves. AAK was the first hydraulic valve manufacturer willing to help solve the problem in time. With the help of AAK, she passed the probation period smoothly. AAK is her first trusted Chinese hydraulic valve manufacturer.

AAK hydraulic directional control valves, do something you trust, welcome to have a small try!

Philip comes from a hydraulic equipment company in Italy. He has purchased hydraulic pressure reducing valves in China for several years. He is also an old customer of AAK. At the beginning of last month, Philip emailed that there was a problem with the hydraulic pressure reducing valves he purchased elsewhere at the beginning of last year, and the company had to pay a lot of money after sales. The boss had big disagree opinion on him. After further communication, we learned that in order to reduce the purchase cost by 17%, he did not choose AAK and purchased hydraulic pressure reducing valves from another factory.

The crane sold by Philip’s company suddenly increased the load of variable displacement pump during operation, resulting in the control failure of the whole hydraulic system. Under normal circumstances, the hydraulic pressure reducing valve of the variable displacement pump as the emergency safety valve is in the normally closed state. This time, the pressure of the variable displacement pump cannot be released due to the jamming of the hydraulic pressure reducing valves, resulting in the collapse of the system. The customer requests to replace the hydraulic pressure reducing valves on the equipment and compensate the cost of work delay on the construction site.

Philip asked the original manufacturer to replace the hydraulic pressure reducing valves. The manufacturer said that the hydraulic pressure reducing valves have been used for more than half a year. The problem of the valve spool sticking is caused by sundries in the hydraulic oil used by the user. At present, this model of hydraulic pressure reducing valves is not in stock, and it will take at least more than a month to re produce. I asked Philip to send me the model and parameters of this style of hydraulic pressure reducing valves. After analysis, AAK engineers found that the hydraulic pressure reducing valves needed by Philip was exactly the same as that ordered by one of our Russian customers last time. We have it in stock. The next day, AAK sent 20 hydraulic pressure reducing valves to Philip by air express. After receiving them, he asked the after-sales engineer to replace it on site. As a result, everything was normal and the crane could operate smoothly.

A week later, Philip sent an email saying that thanks to AAK hydraulic pressure reducing valves, which saved the company a compensation. The boss also appreciated AAK for its help and suggested Philip list AAK as their preferred supplier of hydraulic pressure reducing valves. The price of AAK hydraulic pressure reducing valves may be a little higher than that of its counterparts in Ningbo, but you have no worries when using it. AAK knows that the hydraulic pressure reducing valve is the soul of this crane. Therefore, AAK controls the production quality of the hydraulic pressure reducing valves strictly, so that customers can buy it at ease and use it at ease.

AAK hydraulic pressure reducing valves have two absolute advantages and has already surpassed its domestic counterparts.

1. AAK has a high-precision CNC machining center imported from Switzerland and various independent fixtures upgraded and refitted by itself, which eliminates human errors and avoids valve spool sticking and other faults.

2. The independent professional R & D team, combined with unique R & D technology, has realized the personalized customization demand of hydraulic pressure reducing valves, which can not be achieved by 95% of domestic peers.

Peter told me privately that his boss asked him to send samples of the other hydraulic pressure reducing valves previously purchased to AAK for quotation. Even if the price is a little expensive, they should also choose AAK hydraulic valves which are more stable. They not only admire AAK's professional analysis ability, but also AAK's ability to solve difficulties for customers in time.

AAK hydraulic pressure reducing valves, professional and whole-hearted, help customers solve problems in time. You are welcome to have a small try.

German customer David has been purchased hydraulic relief valves in Ningbo in a same factory. At the beginning of last year, David purchased a batch of hydraulic relief valves for crane system in AAK because the original supplier was not able to meet the delivery. He sent an email last week saying: "with AAK hydraulic relief valves, the stability is 8% higher than that of the original supplier, and there is almost no external leakage". This surprised him. The use experience of AAK hydraulic relief valves has benchmarked with their previous local hydraulic relief valve manufacturers in Germany.

The vast majority of hydraulic valve bodies are made of nodular iron, vermicular iron and gray iron and cast with resin sand as the molding medium. Therefore, there is sticky sand in the casting, which is easy to pollute the oil system and block the valve and filter, which is the key factor affecting the stability of hydraulic relief valves. Most of the common sand cleaning methods of hydraulic relief valves used in the industry are shot blasting and electrochemical sand cleaning, all of which have limitations.

1. Shot blasting can not completely remove the sticking sand from the valve hole with complex structure and small oil passage, which is easy to affect the tightness and product accuracy, and is not conducive to the stability of the hydraulic relief valves.

2. Electrochemical sand cleaning can relatively remove the sticky sand in the narrow oil passage, but it has high energy consumption, high operation intensity of workers, easy to have human errors, can not completely remove the sticky sand, and is not conducive to the stability of the hydraulic relief valves.

Improving the quality of hydraulic parts processing process, improving the cleanliness level and ensuring the stability of hydraulic relief valves has always been the hard index of AAK hydraulic relief valves. Auxiliary processing of hydraulic parts mainly includes: sand cleaning of valve body, deburring or residue treatment of parts and cleaning of hydraulic parts. How does AAK do the sand cleaning of hydraulic relief valves?

AAK technical team has continuously improved the sand cleaning process of hydraulic relief valves after years of technical improvement. For the sand cleaning of small complex castings, AAK has its own unique AAK sand cleaning 5 methods, namely: artificial aging - Pickling - rinsing - rust prevention - ultrasonic cleaning. Artificial aging is used to reduce the binding force between the casting and sand, acid pickling is used to remove the oxide skin at the joint between the sand and the casting to peel the sand from the casting, and then the explosion of compressed air during ultrasonic cleaning is used to peel off the sand, so as to achieve the purpose of sand cleaning.

AAK has its own unique advantages of AAK sand cleaning 5 methods: (1) it is less affected by the casting structure; (2) it is carried out before machining and does not affect the arrangement of machining process; (3) although it has a certain impact on the environment, antifogging agent is added during pickling to reduce the impact. At the same time, corresponding corrosion inhibitor is added during pickling, and rust prevention treatment is carried out immediately after rinsing to ensure the stability of hydraulic relief valves. This is also the reason why the stability of AAK hydraulic relief valves is more than 8% higher than that of other manufacturers.

The stability of AAK hydraulic relief valves comes from AAK unique and efficient sand cleaning methods. You are welcome to try an order!

Davis is an old customer from Germany. We met 3 years ago and he purchases hydraulic valves from AAK every year. In the second half of last year, Davis suddenly asked me: can AAK hydraulic valve blocks be as stable as the hydraulic valves? I feel that there is a problem with the hydraulic valve blocks he purchased from other manufacturers. According to the hydraulic valve block drawings sent by Davis, AAK engineers found that this hydraulic valve block is indeed difficult after review. In particular, the oil passage width of the hydraulic valve block is more than 2 times smaller than that of the conventional one, and some valve spool holes are multi segmented structure, which has high requirements for hydraulic valve block processing and iron filings cleaning. I told Davis that you will see the results in 40 days. One month later, AAK sent 5 samples of hydraulic valve blocks as scheduled. Strangely, 2 months later, there was no news from Davis about this hydraulic valve block.

After a lapse of more than half a year, that is, last week, Davis sent an email to purchase 1,000 hydraulic valve blocks at one time. The stability of the hydraulic valve blocks must not be lower than that of the samples sent half a year ago. More than half a year has passed since proofing, suddenly, an order of such a big quantity for hydraulic valve blocks have been placed, which makes us happy and surprised.

Davis informed that the hydraulic valve block samples provided by AAK have been tested internally. Half a year later, their engineers thought that the hydraulic valve block samples provided by AAK had passed the test, so they placed a large order of hydraulic valve blocks today. In fact, this is not their new order, but moved from the original hydraulic valve block manufacturer to AAK. The original manufacturer started shipping 2 years ago, but during these 2 years, users always complain that the burr of the hydraulic valve blocks pollutes the oil. Sometimes the burr of the hydraulic valve blocks causes the hydraulic valves to jam, which makes their after-sales personnel very embarrassed. They also tried to ask more than 20 new manufacturers of hydraulic valve blocks for solution, but none of them can guarantee 100% free of iron filings. They can only continue to purchase this hydraulic valve block from the original manufacturer. The boss was very unhappy and gave Davis half a year. If the burr problem of the hydraulic valve blocks cannot be completely solved, they can only purchase domestically from Germany in the future, even if the price is more than 60% expensive.

AAK hydraulic valve blocks have withstood the test for half a year and Davis also completed the task given by the boss. Davis was also surprised. Later, he asked me: Why can't the original manufacturer solve it for 2 years and more than 20 manufacturers can't guarantee it 100%. How can AAK hydraulic valve blocks be 100% burr free?

1. AAK adopts German Alma ultrasonic, which is a sharp deburring tool. Its instantaneous high pressure can effectively remove the burr of the inner hole of the hydraulic valve blocks.

2. Then use the industrial endoscope to check all the hydraulic valve block channels again to ensure that there are no dead corners.

3. Then observe the inner hole of each hydraulic valve block with a high magnification microscope to ensure that it is 100% free of burrs and other impurities before packaging.

AAK hydraulic valve blocks have unique skills in deburring. You are welcome to give it a try!

For the leakage in the pilot-operated pressure control valves less than 2drops /min, Howard from Accupress in Canada, contacted more than 30 Chinese hydraulic valve manufacturers. Only AAK pilot-operated pressure control valves met the standard and replaced his local factory in the United States. Last year, the hydraulic shearing machine they listed sold well. The boss decided to mass produce it in Suzhou, China. However, the pilot-operated pressure control valve to be used in the hydraulic shearing machine was originally purchased in the United States, and the internal leakage is less than 2drops / min. If the pilot-operated pressure control valve is purchased from China, it will save money and time. While contacting some old suppliers, Howard is also looking for new manufacturers of pilot-operated pressure control valves.

We also received Howard's inquiry. The email subject is: can you supply pilot-operated pressure control valves with internal leakage less than 2drops / min for our Suzhou factory? We thought it was a domestic purchase, so we politely refused. Until Howard's second email told us why he wanted to ship to Suzhou, and he contacted more than 30 Chinese hydraulic valve manufacturers, only two of them replied that they could try to make samples of pilot-operated pressure control valves with internal leakage less than 2drops/min, and there was no any reply from the other manufacturers.

Howard asked if AAK pilot-operated pressure control valves could meet American factory standards? If not, the sample is meaningless. I told him directly that AAK had tested samples of pilot-operated pressure control valves with internal leakage less than 2drops/min for a German company some time ago. The pilot-operated pressure control valves can be refunded in full if our samples do not meet the standard. One month later, 30 pilot operated pressure control valves were sent to Accupress's Suzhou plant.

Four weeks later, Howard sent an email saying that their engineers tested the pilot operated pressure control valves of AAK and two other manufacturers, and only AAK samples met the standard. Some parameters were higher than those of the original American factory, and those of the other two manufacturers did not meet the standards. In particular, AAK pilot operated pressure control valves caught up with and surpassed his American factory, which surprised him.

AAK pilot operated pressure control valves can meet such requirements because of two reasons:

1、For the pilot operated pressure control valves, the matching clearance accuracy between the valve spool and the valve body directly determines the internal leakage of the whole valve. AAK has German Nagel precision honing machine. After honing, the dimensional accuracy of the cone plating of the valve spool and valve body of the pilot operated pressure control valve is IT7 ~ 4, and the surface roughness can reach Ra0.32 ~ 0.04μm, which can not be achieved by most of hydraulic valve manufacturers.

2、After assembly, AAK uses a special air pressure tester to detect the leakage of each pilot operated pressure control valve. Within the set pressure and time range, AAK judges the internal leakage according to the number of bubbles. However, most factories use the oil pressure test method. As I have known that there may be no more than three factories that can use special air pressure test.

Howard told me privately that his boss appreciated his quick finding a supplier who could replace the pilot operated pressure control valves produced in American factory. Now his purchasing authority has been improved.

AAK pilot operated pressure control valves, the internal leakage is less than 2drops /min. You are welcome to have a small try!

Back from the three-day holiday, the director of the machine tool workshop sent a production report of TRV-08 hydraulic direct acting relief valve for an Indian customer early in the morning.

The first paragraph is like this: "the programmers in our workshop made a low-level mistake and compiled the leakage of 2 drop / min in the hydraulic direct acting relief valve into a production process of 5 drop / min. I didn't check it out because I was anxious to go back to my hometown for the holiday".

Seeing this production report of TRV-08 hydraulic direct acting relief valve, I was angry, not because the hydraulic relief valves produced has to be wasted, but because the workshop director indicated it as a low-level mistake in order to whitewash it. In every production link of hydraulic valves, error is error. There has never been any low-level error or high-level error. As long as you make a mistake, it's either bleeding or dying.

I replied to him:

1. Re-produce TRV-08 hydraulic direct acting relief valve and work overtime continuously to make up for the the production progress delayed for 3 days. The produced parts of hydraulic relief valves shall be put into the waste warehouse and registered.

2. In the production of hydraulic valves, if you will make a mistake that no one has ever made, you can be promoted from workshop director to production director.

The thought of predecessors is the ladder of future generations. To experience the pain of bleeding from mistakes, you can grow. No matter the production programming of hydraulic direct acting relief valves or other production links of hydraulic direct acting relief valves, we should not be careless.

AAK hydraulic relief valves, it doesn't matter if there is a mistake. First recognize the mistake, then correct yourself, and then protect customers. You are welcome to try an order with AAK.

Last October, Henry had planned to go to Hawaii with his family for a vacation. The day before he left, he was informed that a customer complained about the vibration problem of his company's hydraulic power unit during low-speed operation. The boss asked Henry to solve the problem immediately. As the purchasing manager of the company, he had to cancel the annual leave. The engineer tested the hydraulic system on site and preliminarily judged that the hydraulic counterbalance valve was abnormal. The engineer disassembled the hydraulic counterbalance valve and failed to find out the reason. The hydraulic counterbalance valve was tested separately, and each parameter was up to standard. Henry began to contact the local hydraulic counterbalance valve supplier and wanted to solve it as soon as possible, but there was no reply.

Henry found the original hydraulic counterbalance valve manufacturer. The factory said that he OEM the hydraulic counterbalance valve completely according to their hydraulic counterbalance valve drawings. He also specially retested the hydraulic counterbalance valve in stock, and its parameter basis was qualified. Henry was embarrassed to face such a situation. Henry thought of AAK because we helped him solve the difficult problems of hydraulic counterbalance valves several times before.

We received Henry's email and understood that neither the original manufacturer nor the local manufacturer provided solutions. According to the working video of the pressure unit provided by Henry, our engineers recognized their preliminary judgment that the hydraulic counterbalance valve was abnormal. The function of the hydraulic counterbalance valve is to balance the "negative load force" opposite to the required movement direction, which makes the hydraulic motor easier to control. The vibration problem in the complaint is that the hydraulic counterbalance valve affects the control ability of the balance circuit to the load. This is just our first guess about the fault. The specific situation needs to be determined in combination with the actual hydraulic counterbalance valve samples.

Henry sent us the hydraulic counterbalance valve samples the next day. After our engineers disassembled it, we are 90% confident that our judgment is correct. The check valve throttling groove of their hydraulic counterbalance valve is a traditional design. According to the working condition of their pressure unit, the design of double triangular throttling groove of hydraulic counterbalance valve has a little influence on the stability of valve spool. The hydraulic counterbalance valves we shipped to a Russian customer 2 years ago also encountered similar problems. I suggest Henry redesign the structure of the hydraulic counterbalance valve. A month later, AAK sent out 10 samples of hydraulic counterbalance valves, Henry installed the equipment for commissioning, and there was no vibration problem.

AAK engineers changed the design of the check valve throttling groove of the hydraulic counterbalance valve from double triangular throttling groove to independent triangular throttling groove. The overflow area of the throttling groove, the internal fluid flow of the check valve spool and the dynamic characteristics of the balance circuit were compared and analyzed. Finally, it was determined that the triangular throttling groove had a much smaller impact on the stability of the valve spool and the system than the double triangular throttling groove.

Henry sent me photos of a happy vacation in Hawaii and thanked AAK for solving the problem professionally. His boss was very satisfied with his quick solution to the problem and specially gave him two more days off. He was very happy.

AAK hydraulic counterbalance valves, your problem today may be the road I walked yesterday. You can have a small try!

Since the epidemic, many work forms have changed. Whether working at home or in 3 + 2 mode, it tells us that the future organization will be a new mode, and the manufacturers of hydraulic valves are no exception. My understanding of the future factory is that the factory is a factory, only a limited production department. Just like our hydraulic valve factory in Cixi, it has only one function - producing hydraulic valves, which is the "1" in the "6 + 1" industrial chain.

For hydraulic valve industry, "6" in the "6 + 1" industrial chain refers to: 1) hydraulic valve design and innovation, 2) procurement (raw materials, or semi-finished products), 3) warehousing and transportation, 4) order processing, 5) hydraulic valve sales, 6) after-sales and service; "1" refers to the production of hydraulic valves. A few years later, our hydraulic valve factory is no longer crowded. The hydraulic valve workshop is either the sound of machine tool cutting metal, or 2-3 masters who give machine tool instructions or maintenance.

Small bosses shouldn't care about the macro-economy, which has nothing to do with you and me. Just like me, you can focus on a subdivided field of hydraulic valves, and it is enough to achieve the top 1% in this field. Please note, it is not Top 1. AAK has always focused on the single product of hydraulic valves. It works online for 4 hours a day, which is 7,300 hours in 5 years. It has reached the top 1% of the subdivided field of hydraulic valves. If your enterprise can't reach the top 1%, add another 2 years and reach 10,000 hours in 7 years. You must be the top 1%.

Seven years is a watershed for many enterprises. Seven years later, if your enterprise is still "poor", there must be problems in your cognition, thinking and method. The "conspiracy theory" on the Internet makes those with simple brains look less simple. Online "knowledge fast food" makes those who never "think deeply" look like they can "think deeply". This is not a good way to do the hydraulic valves.

Online, our circle is no longer restricted by the actual conditions and regions, and it is easier for those with similar interests to gather together. Although you may be in completely different industries, or even you and I are far from each other, the same combination of "cognition" and "Three Reviews" makes you attract each other. AAK hydraulic valves adhere to our three views and the top 1% of the industry.

AAK hydraulic valves adhere to a group of people, a lifetime and one thing, let each user use AAK hydraulic valves without any trouble. AAK hydraulic valves adhere to the principle of integrity, does a good job in the business of AAK hydraulic valves, and sincerely treats the customers who purchase each hydraulic valve. Let more customers use good hydraulic valves with real materials without wasting money.

AAK hydraulic valves, top 1%, welcome to give it a try.

Last Friday, I received an email from Shikha, an Indian hydraulic directional valve customer. I was depressed all weekend and didn't even want to reply to the email. In July last year, Shikha placed a trial order for a hydraulic directional valve. Three months later, Shikha asked the price of the hydraulic directional valve to be reduced by 40%, on the grounds that the order quantity of the hydraulic directional valve is bigger now. At that time, we only reduced the price by 5%, but Shikha forwarded the email of other manufacturer accepting the price reduction to me. It means that if AAK hydraulic valve can not accept the price reduction, the order will be placed with other hydraulic directional valve manufacturer. It turned out that he tried the order at AAK and another manufacturer at the same time last July.

Last week, Shikha contacted AAK again and asked us to accept the same price as last time. I felt that the hydraulic directional valves he purchased from other manufacturer was not smooth, then he turned back to AAK, so we insisted on the original quotation and got his weird email on Friday: "Why does AAK have to make money to make this hydraulic directional valve? Don't many manufacturers in China make a few points of profit?"

Indeed, there are hydraulic directional valve manufacturers doing market common products. The only thing they can do is to compete with low price, and then make small moves under table in production. This is the involution of the hydraulic valve industry. AAK does not want to accept such orders for hydraulic directional valves, nor does it want to contact such customers.

No matter what enterprise, if it doesn't make money, it can't find its mission, vision and values. If an enterprise deliberately creates its mission, vision and values, it is illogical. If the enterprise doesn't make some money first, where will these things come out of the mind? No matter how small an enterprise is, it may not realize the value of the enterprise until it has a net profit of at least one million yuan. For example, in what aspects has AAK hydraulic valves created value for customers and brought additional benefits to customers, as well as benefits that can not be given by hydraulic valve peers, not to mention the R & D cost of hydraulic valves, production process upgrading cost and equipment renewal cost. On the way of making money continuously, the enterprise's mission, vision and values will be clearer until the enterprise's mission, vision and values are slowly found and what the enterprise really wants to say and do.

In the past few years, the conversion rate of AAK online inquiry is 17%. Does this 17% seem not high enough? But AAK never does business for poor enterprises. Our customers are concentrated in European and American brand hydraulics, and their operation is standardized. As long as the quality of your hydraulic valves is stable, it is really easy to discuss the hydraulic valve project, rather than forcing the manufacturer to accept the low price of hydraulic directional valves like Shikha.

AAK hydraulic valves, a group of people, a lifetime, one thing, let each user use the hydraulic valves without trouble. Do a good job in the business of AAK hydraulic valves and treat each hydraulic valve purchasing customer sincerely. Let more customers use good hydraulic valves with real materials without wasting money.

AAK hydraulic valves, whose customers are concentrated in European and American brand hydraulics. You are welcome to try the order.

Lucas is from a Canadian hydraulic equipment company. He found AAK hydraulic valves online last September. His first inquiry was the hydraulic pilot-operated pressure control valve. After 3 rounds of email communication, he placed a trial order for 20 pcs of hydraulic pilot-operated pressure control valves. I received the order so smoothly, but I didn't expect that AAK would almost take the blame for others in the first cooperation.

At the beginning of last month, Lucas informed by email that there were problems with all 20 hydraulic pilot-operated pressure control valves provided by AAK. When the equipment was installed and debugged, the hydraulic system went on strike. This is the first time I have encountered such a complaint. AAK will do various tests on each hydraulic pilot-operated pressure control valve before leaving the factory, and deliver it only after it is qualified. I asked the engineer and the workshop to verify. It was proved that the programming and production of the hydraulic pilot-operated pressure control valves are completely consistent with the drawings provided by Lucas, so I can ensure that the samples of AAK hydraulic pilot-operated pressure control valves are qualified.

Our engineers speculate that there may be a problem with the oil circuit design of the valve block system, but Lucas engineers believe that AAK is shirking the responsibility. So I suggest Lucas try the hydraulic pilot-operated pressure control valves of other manufacturers to debug. If the hydraulic system is still abnormal, our guess is right. Two weeks later, Lucas frankly told us that there should be a problem with the oil circuit design and asked us what good methods we had?

The next day, Lucas sent us the video of equipment commissioning. Indeed, during the operation of the equipment, the speed increases when the cylinder of the hydraulic system is lowered, which is equivalent to the increase of flow, and the original set pressure of the hydraulic pilot-operated pressure control valve will also increase, resulting in the instability of system pressure. Therefore, it is inferred that the instability of pressure is caused by the thin oil passage of the hydraulic valve block in the system. We suggest that he send us the schematic diagram of the hydraulic system. After analysis, AAK engineers believe that the oil circuit design cannot match the working conditions of the equipment.

AAK plans to design and process a new hydraulic valve block, and then installs the AAK hydraulic pilot-operated pressure control valves to debug the equipment. If it is not successful, AAK will not charge any fee for the hydraulic valve block. A month later, AAK sent out the newly designed hydraulic valve block. Lucas sent an email 3 days after receiving AAK hydraulic valve block. He informed that after installing the AAK designed hydraulic valve block and the hydraulic pilot-operated pressure control valves, the hydraulic system was normal and the equipment operated smoothly. Their engineers also admire AAK professional analysis ability and problem-oriented ability to design and production.

The failure of a hydraulic valve is not a point problem, but a system. Everything should start from the principle. The average working experience of AAK engineer team is 11 years. Among the hydraulic valve peers in Ningbo, it may not be possible to find the third hydraulic valve manufacturer as such.

Lucas privately told us that his boss suggested that in the future, not only the hydraulic pilot-operated pressure control valves should be purchased from AAK, but also the hydraulic manifolds, because AAK specialty conquered his boss.

AAK hydraulic pilot-operated pressure control valves, professional analysis, efficient design, maybe there is no 3^rd manufacturer like us in Ningbo, you can also have a small try!

At the weekly meeting of hydraulic valve sales, I always ask our business team to study the production process of hydraulic valves with heart, observe the production of hydraulic valve at the workshop with heart, and think about customer emails with heart. Last month, someone asked me what is with heart? I was speechless for a moment.

Recently, I saw an explanation in a book. The difference between using your heart and not is whether you are accepting the world as it is or observing how such a world will affect you? I think the explanation about the difference is in place and hit the nail on the head. Reading the email from hydraulic valve customer, word by word, and even forcibly reciting the whole email, which is still not called reading it carefully with heart.

Reading with heart means thinking about these questions repeatedly in the process of reading:

1. What question is the customer asking or requesting about the hydraulic valves?

2. Do we have any problems with these hydraulic valves? If not, how to convince customers that we don't have these problems.

3. Is the answer we are going to provide persuasive? How can customers trust AAK hydraulic valves with the least amount of time?

4. These hydraulic valve problems raised by customers broaden my vision? If it is widened, what is the problem with my original frame about hydraulic valves?

5. Have I understood the customer's needs and emotions? If not, what's my problem?

When you read the emails with these questions, you will find that we are not reading the emails, but observing our changes through external stimulation, and even receiving the customer's emotion. This is called reading the emails carefully with heart.

AAK team works hard on the hydraulic valves with heart, and understands the needs of each customer with heart. This is our eternal direction!

Whenever there is a new sample of AAK hydraulic valves, I must put it on the desk for a few days. Take a look at the hydraulic check valve with the same attitude of appreciating works of art, and taste a cup of coffee. The work is so simple.

The parameters of AAK hydraulic check valves have surpassed most of the domestic hydraulic valve counterparts, and the appearance is also beyond what the 10-year-old hydraulic check valve manufacturers are able to keep pace with. AAK hydraulic valves have no quality complaints for 6 consecutive years. In 2019, AAK hydraulic check valves were used on aircraft by a Russian customer, which is a witness of good quality.

AAK hydraulic check valve, how good is it? See the visual comparison in the picture below. Only from the appearance, the hydraulic check valve produced by 10 years old factory has lost. Not to mention meeting the parameters of hydraulic check valve using in aircraft, they may not dare to think or do it.

AAK hydraulic valves is an ODM manufacturer for international first-line hydraulic valve brands. It is difficult to find the third one in Ningbo, the hometown of hydraulic valves. You can also have a small try.

Nicholas is from an Italian hydraulic company. Last year, a batch of hydraulic equipment needed to use the hydraulic check valve urgently. Due to tight time, Nicholas purchased in Italy. After installing the local hydraulic check valve, the equipment commissioning was normal, but 3 months later, some users complained that the pressure of the power unit was insufficient. It was found that the hydraulic check valve was stuck on site, resulting in weak pressure supply of the system.

Nicholas contacted the original hydraulic check valve supplier and the supplier replied that the jamming was caused by unclean hydraulic oil. The on-site personnel found that the hydraulic oil was polluted, so they could only disassemble and clean the stuck hydraulic check valve. After replacing the hydraulic oil of the whole system, the equipment returned to normal. But a few months later, the same problem happened again, and Nicholas's after-sales personnel operated again as last time. The boss felt that the problem should be solved fundamentally after he knew it. Such after-sales cost is too high. Their engineers fed back that they could only install the filter screen at the inlet of the hydraulic check valve, but the original design of the equipment did not consider the position of the filter screen. It will cost more to refit the whole set of equipment.

The boss asked Nicholas to contact more local hydraulic check valve manufacturers to brainstorm. After knowing the problem with this hydraulic check valve from Nicholas, and the hydraulic oil is inevitably polluted, combining with their equipment working conditions and installation drawings, I told him that we can only find hydraulic check valve with filtering function. AAK has similar hydraulic check valve with automatic filtering function. Nicholas doesn't believe that AAK can provide such a hydraulic check valve. After receiving AAK sample and installing it, the equipment works normally. Nicholas asked us how long AAK hydraulic check valve with filter screen can work? We told him that there would be no users to apply for repair within 1 year.

Nicholas asked why we are so confident. I told him that a Canadian customer had the same problem last year. We developed this new hydraulic check valve. Within one year, Canadian customer has not reported that there is a problem with this hydraulic check valve yet. Half a year later, Nicholas sent an email saying that his customers had never changed the hydraulic oil after using AAK hydraulic check valves.

At that time, in order to save the installation space of filter plug-ins for the hydraulic system of Canadian customer, not to use bulky filter containers, and keep the system clean and extend the service life of hydraulic check valves, AAK designed a hydraulic check valve with filter embedded into the body, that is, the filter screen and the hydraulic check valve are installed in the valve block together. The filter made of 304 stainless steel can effectively remove the fine particles in the hydraulic oil, and it is no longer necessary to change the hydraulic oil once every 3 months.

AAK hydraulic check valve with filter screen saves money and worry. You can also have a small try!

AAK unique 5 steps sand cleaning method replaces the traditional method commonly used by peers, and completely solves the problem of valve stuck or filter blockage of hydraulic relief valves caused by hidden danger in sand cleaning. The American customer placed an order for the hydraulic relief valves to AAK 3 days after the test run.

Most of the bodies of the hydraulic relief valves are made of nodular iron, vermicular iron and gray iron and cast by sand turning with resin sand as the modeling medium. Therefore, there is sticky sand in the casting, which is easy to cause valve jamming and filter blockage. Most of the common sand cleaning methods of hydraulic relief valves in the same industry are shot blasting and electrochemical sand cleaning. These methods have limitations and are not conducive to the stability of hydraulic relief valves.

Gabriel is a purchaser of a hydraulic company in the United States. In previous years, he purchased the hydraulic relief valves in the United States. Recently, there is an order for hydraulic relief valves. The production of the original domestic manufacturer is full schedule, while the other hydraulic relief valve manufacturers dislike the small quantity and are unwilling to accept the order. The company asked him to check with Chinese hydraulic relief valve manufacturers. Among several hydraulic relief valve manufacturers recommended by his colleagues, Gabriel chose 3 of them to send samples after a round of comparison. After 20 days, the samples of these 3 hydraulic relief valve manufacturers were generally stable and prone to valve jamming or filter blockage. The root cause was the incomplete sand cleaning process of the hydraulic relief valves.

When browsing B2B websites, Gabriel saw that AAK website www.aakindustry.com introduced the 5 steps sand cleaning method of hydraulic relief valves. He left a message on our website: Can AAK make the hydraulic relief valves not stuck or the filter not blocked? We replied him directly: AAK hydraulic relief valves with 5 steps sand cleaning method have been recognized by German customers. You are welcome to try the order. Gabriel subconsciously approved AAK hydraulic relief valves but was still some concerned because of no cooperation before, so he asked for samples to test first. According to the draft of hydraulic relief valves sent by him, we sent samples in 2 weeks. Gabriel issued official PO on the 3rd day after receiving the hydraulic relief valve samples for commissioning, and requested that the bulk goods to be 100% sand cleaned thoroughly.

AAK adopts more efficient sand cleaning method and has its own unique 5 steps sand cleaning method for small and complex castings, namely: Artificial aging - Pickling - Rinsing - Rust prevention - Ultrasonic cleaning. Artificial aging is used to reduce the binding force between the casting and sand, acid pickling is used to remove the oxide skin at the joint between the sand and the casting, so as to peel the sand off the casting, and then the explosion of compressed air during ultrasonic cleaning is used to make the sand fall off, so as to achieve the purpose of 100% sand cleaning. Gabriel issued the PO in 3 days after receiving AAK hydraulic relief valves for testing. This is a witness of AAK unique sand cleaning methods.

AAK hydraulic relief valves do not block the valve or filter, which is due to AAK unique 5 steps sand cleaning method. You can also have a small try.

The XX hydraulic manufacturing company in Germany has been rooted in the hydraulic system equipment of the airport for many years. A batch of hydraulic pressure reducing valves purchased by the novice Carla at the beginning of the year were repeatedly complained by the airport, which brought a lot of losses to the company's after-sales service and alerted the boss. In the first half of last year, Carla’s company sold hydraulic power units to Malaysia, which is used to supply emergency fuel to aircraft at the airport. The equipment was reported for repair after running for about a month. The after-sales engineer handled it at Kuala Lumpur Airport and locked the abnormality of the hydraulic pressure reducing valves according to the fault code. Finally, it was found that the sealing ring of the hydraulic pressure reducing valves was corroded, affecting the operation of the equipment.

The engineer asked Carla to mail the new sealing ring to the site within 2 weeks. The manufacturer of the original hydraulic pressure reducing valves learned that the sealing ring was seriously corroded and was willing to replace with fluororubber sealing rings, which have the best corrosion resistance, for free. The manufacturer also reminded Carla that when she placed the order, the medium used in the hydraulic pressure reducing valves was not specified, so the conventional nitrile rubber sealing rings were equipped. Considering that Carla is a novice, he is willing to offer replacements for free.

Carla thought that the abnormal hydraulic pressure reducing valves were solved in this way. Unexpectedly, the same problem occurred only two months after the replacement. The customer was angry and said that if the second after-sales service still couldn't solved the problem at one time, all the equipment would be returned. Carla went to the original manufacturer of hydraulic pressure reducing valves again, and the manufacturer gave up, because the fluororubber seal ring was their best choice. Now Carla was worried and had to turn to her purchasing director for help. The director asked her to contact AAK hydraulic valves first. If AAK still cannot solve it, there will be no need to waste time on Chinese hydraulic pressure reducing valve manufacturers and can only purchase from Germany.

After receiving the email, AAK replied that she should not worry. According to the drawing parameters of her hydraulic pressure reducing valve, it matches a hydraulic pressure reducing valve used in aircraft completely that AAK produced for a Russian customer reorder some time ago. We still have some quantity in stock, and can ensure that AAK hydraulic pressure reducing valves will not be reported for repair for at least one year. The next day, AAK sent 10 hydraulic pressure reducing valves to Kuala Lumpur Airport.

Carla emailed us a few days ago that after using AAK hydraulic pressure reducing valves, the equipment has been running smoothly for 6 months, while the ones from the original manufacturer were reported for repair in 2 months. She was surprised by the sealing ring of AAK hydraulic pressure reducing valves.

AAK can't be careless in details. Like the original manufacturer, not to check the use medium of the hydraulic pressure reducing valves, but ship order blindly, this is zero tolerance for AAK. The aircraft hydraulic system uses highly corrosive aviation blue oil. Even the fluororubber sealing ring considered as the best by most manufacturers is still not suitable for this medium. Three years ago, AAK tested for many times and found that EPDM seal ring is the most suitable for aviation blue oil medium. Its special molecular structure is highly chemically stable, especially the anti-aging property is several times that of fluorine rubber. This is also the reason why Russian customer has been reordering the hydraulic pressure reducing valves on aircraft from AAK.

AAK hydraulic pressure reducing valves have tips on sealing rings, which can be used in the airport. Peers can't think of it. You are welcome to give it a try!

Yesterday, a person of the same export trade of hydraulic valves came to my office. He lamented that it was too difficult to do the export of hydraulic valves. I thought he met someone who blackmailed him.

He said that the export of hydraulic valves is B2B business. Because the hydraulic valve industry is too professional, he can't contact the decision-makers. From the first hydraulic valve inquiry from buyer to the final shipment, the whole delivery time is long, and it's too difficult to complete an order.

This seems to be a common problem of B2B business. I suggest him read the book "the life that has not been destroyed". There is a sentence in the book: the real great is life. After being destroyed so many times, it is the most meaningful to live and die, and to have a bright future. Every time we are confused, it is the hidden willows and bright flowers that life gives us.

AAK hydraulic valves, every product is exported to overseas. Whether it is the test order of hydraulic valves delivered by express, the urgent air shipment of hydraulic valves or the big sea shipment of hydraulic valves, it is the result of customers' trust in AAK. The hydraulic valves have strong professionalism, long delivery time, high amount and complex decision-making process, which requires the direct decision-making of senior management and even the boss. It's really difficult to break through layers and open the door of a hydraulic valve order. AAK is not in a hurry to close the deal of hydraulic valves, but regards it as a process of slowly accumulating influence, which is suddenly enlightened.

AAK hydraulic valves have invested a lot of money in equipment upgrading, a lot of people in technical iteration and a lot of time in output content. Our ultimate goal is only to influence. Moisten things silently. Day after day, insist on using high stability hydraulic valves, high-quality content and high return rate of reputation to open the door of decision-makers of large companies. AAK hydraulic valves, with tolerance, planted a seed called "AAK influence".

Many times, slow down the heart but work diligently and silently, until one day, when you meet a stranger offline, after greeting, he said to you: I already know you. I've read your content. It's really good. At this time, you will succeed. AAK hydraulic valves are just going this way.

AAK hydraulic valves only appear in the time and space you urgently need.

Today's weather is fine and I'm in a good mood, too. It took us 6 months to finally send the samples of the hydraulic counterbalance valves used in the sandstorm to Leonard. Their company has operated hydraulic equipment in Italy for more than 30 years. Leonard has been successful in purchasing hydraulic valves. AAK is their old supplier of hydraulic valves, but he has not purchased hydraulic balance valves from AAK yet. In the past, I asked why there was no inquiry or sampling of hydraulic counterbalance valves. He advised that their hydraulic counterbalance valves were purchased from another supplier who had cooperated for many years.

At the beginning of last year, Leonard sent an inquiry for the hydraulic counterbalance valves. At that time, I was a little surprised. I estimated that he had trouble purchasing hydraulic counterbalance valves from the original manufacturer. After communication, it was learned that their company had a batch of hydraulic equipment sold to the Middle East in previous years, and the hydraulic counterbalance valves used had to be replaced almost every 6 months. The customer was not very satisfied with this high-frequency after-sales service. The original manufacturer said that the hydraulic counterbalance valves used in other places do not need to be replaced for 1 or 2 years. There is often haze or sandstorm weather in the desert areas of the Middle East, and the solid particles will virtually cause corrosion to the exposed surface of the hydraulic counterbalance valves, resulting in a high replacement frequency of the hydraulic counterbalance valves, and there is no good way to solve it at present.

Leonard contacted AAK to improve their after-sales service. Try AAK hydraulic counterbalance valves to see if they can be used for more than 6 months in a sandstorm environment. According to the hydraulic counterbalance valve drawings from Leonard, the parameter requirements are of medium grade. The core is to select the stainless steel with the best corrosion resistance as the external parts of the hydraulic counterbalance valves. I suggest Leonard ask his customer to send the particles in the worst weather to AAK, analyze the PH of the environment, and then increase the PH by 30% to test the service life of different steels.

Three months later, Leonard asked about the progress of the hydraulic counterbalance valve samples and joked that if AAK development is successful this time, all their future hydraulic counterbalance valves will be purchased from AAK. Another three months later, a special steel produced by ArcelorMittal group from Luxembourg was successfully tested by AAK technical team. Using this special steel as the external part of the hydraulic counterbalance valves can ensure corrosion resistance for at least 1 year. It took us 6 months to finally send samples of the hydraulic counterbalance valves used in sandstorm to Leonard. We also told Leonard that the production cost of hydraulic counterbalance valves made of special materials has been increased by 40%. Leonard said that if AAK hydraulic counterbalance valves are durable for more than 1 year, even if it is 40% higher, it is cheaper than using the original manufacturer's hydraulic counterbalance valves that need after-sales service twice a year. Last week Leonard emailed that the customer reported that AAK hydraulic counterbalance valves had been used for 9 months and there was no corrosion trace on the surface. The headache corrosion problem should be solved.

Leonard privately informed that AAK hydraulic counterbalance valves still have a three-month test period. If there is no customer repair report within 1 year, AAK will be their hydraulic counterbalance valve supplier in the future. I think this is the best return for AAK R & D ability.

AAK hydraulic counterbalance valves, which can't be achieved by peers, you can also give it a try!

William comes from a Canadian hydraulic equipment company and has purchased hydraulic valve blocks in Ningbo for several years. AAK also supplies several difficult hydraulic valve blocks to their company. Although the quantity is not big, AAK service makes William very satisfied. In the second half of last year, William emailed an inquiry for a big quantity of order for hydraulic valve blocks. William said that the quotation was 40% higher than that of other hydraulic valve block manufacturers. I'm not surprised at all that he advised that the price of AAK hydraulic valve block is 40% higher.

According to the hydraulic valve block drawing provided by William, AAK engineers found that according to the working condition requirements of the hydraulic valve block and the minimum wall thickness between two adjacent parallel holes (including installation threaded holes) in the middle of the valve block designed on the hydraulic valve block drawing is less than 4mm, the 6061-T6 Aluminum material marked in the drawing is not suitable, because this wall thickness can not bear the pressure of 350bar at all. During the operation of the equipment, the hydraulic valve block is likely to be broken down because it cannot withstand high pressure, that is, the materials used for the hydraulic valve block must be changed, rather than blindly follow the original hydraulic valve block drawing. AAK uses 7075-T6 aviation aluminum, which is the root cause of 40% higher price. A week later, William replied that he also sent the inquiry to the old hydraulic valve block supplier and more than 10 other hydraulic valve block manufacturers, but none of them suggested change the aluminum materials. He wondered whether AAK deliberately changed the materials for more profits. This large order of hydraulic valve blocks had been placed with the original supplier. Then I replied with a few words: good luck.

Two months later, William sent an email saying that he regretted that he had not followed AAK suggestion at the beginning. The hydraulic valve block sample from old supplier was debugged 3 days after the equipment was installed. The manufacturer of the hydraulic valve blocks said that the sample was completely in accordance with the drawing and the development cost could not be refunded. The equipment commissioning time was wasted. The boss was very unhappy and asked William to try AAK samples even if the price was 40% higher, and asked to send the hydraulic valve block samples as soon as possible. AAK uses 7075-T6 aviation aluminum to make samples by soonest. After 30 days, AAK sent 2 samples of hydraulic valve blocks.

Last Monday, when I opened the mailbox, I saw the unread email of hydraulic valve blocks from William. I knew that AAK hydraulic valve blocks passed the test of equipment commissioning. After opening, as expected, he placed a large order of 800 hydraulic valve blocks at one time. He also felt sorry to mistake AAK professional suggestion for deception.

The 6061-T6 material on his hydraulic valve block drawing is only suitable for hydraulic valve blocks with a pressure below 220bar and a wall thickness of more than 5mm. Compared with 6061-T6, 7075-T6 aviation aluminum material has high strength, high hardness, more precision, good toughness, can be pressed or impacted for a long time, is not easy to deform, and has excellent wear resistance and fatigue resistance. It is the aluminum alloy with the highest strength at present.

AAK hydraulic valve block is highly professional and cost-effective. You can also have a small try!

According to the financial dept this morning, there was a sample fee for hydraulic pilot-operated relief valves. I knew it was from ROQUET company in Spain. One year ago, Domingo in their company had a hydraulic pilot-operated relief valve that needed AAK to make samples, but was unwilling to pay $2,000 of the sampling fee. The original factory didn't need them to pay, so they chose that factory to produce this hydraulic pilot-operated relief valve. Last week, Domingo came to me again to ask if there was time for sampling and they would pay the sampling fee.

After communication, it was learned that the hydraulic pilot-operated relief valves shipped by the original factory were used in the hydraulic power unit. Less than half a year, it was reported for repair by the customer. It is easy to have insufficient power supply of the hydraulic system during the construction process. The after-sales engineer found that the wear of the valve spool of the hydraulic pilot-operated relief valves led to leakage. He had to use the alternative pilot-operated relief valves first and asked Domingo to contact the original manufacturer to solve the problem. The original manufacturer reported that the hydraulic pilot-operated relief valves had not been worn for more than 1 year previously. The working pressure is more than 450bar this time. The domestic hydraulic pilot-operated relief valves can only have a service life of half a year. If you want to find a hydraulic pilot-operated relief valve with a service life of more than 1 year, you can only buy it from HAWE in Germany. They are the best manufacturer of hydraulic pilot-operated relief valves with high pressure resistance in the world, but the price is estimated to be more than twice that of Chinese manufacturers.

Domingo was a little helpless and asked the boss whether to purchase directly from HAWE in Germany or continue to look for hydraulic pilot-operated relief valve manufacturers in China. Because the alternative hydraulic pilot-operated relief valves were used on the construction site, they still had a 6-month buffer period. The boss asked him to look for the hydraulic pilot-operated relief valves under high pressure at the same time. At this moment, he thought of AAK. When I told him that the key point of the service life of this hydraulic pilot-operated relief valve is to resist high pressure, AAK has an engineer who has worked in HAWE Shanghai factory for 8 years, our production of high-pressure hydraulic valves is just to benchmark with that of German HAWE company, he seems to realize that perhaps AAK can sample a hydraulic pilot-operated relief valve with a service life of more than 1 year this time.

AAK replied that it could complete the samples of 12 hydraulic pilot-operated relief valves within 1 month, and the warranty was more than 1 year. Domingo remitted the sample fee of US$2,000 the next day. I asked him why he was unwilling to pay last time, but this time he immediately paid the sample fee of the hydraulic pilot-operated relief valves. He was frank about two points. First, AAK mentioned the key points for the success of the sample. Second, AAK high-pressure hydraulic pilot-operated relief valves benchmarked with German HAWE company.

The reason why AAK can tell the key points and why it can benchmark with German HAWE company is that there are two key points of AAK pilot-operated relief valves. It may be difficult to find the second manufacturer of hydraulic valves in Ningbo.

1. The valve spool of AAK pilot-operated relief valve is ETG100 produced by STEELTEC company of Switzerland, which is easy to cut and has high strength. It is suitable for high-speed CNC processing, and the strength of each section inside and outside the material is consistent. After the valve spool is processed into shape, the strength will not be affected.

2. AAK has a high-precision CNC machining center imported from Switzerland. After the engineers set the program, they can control the steel processing efficiently and without mistakes. Not only the strength is not affected, but also the accuracy is guaranteed.

AAK hydraulic pilot-operated relief valve is used for working pressure above 450bar. You can also have a small try!

Chinese hydraulic valve manufacturers, the number of exports in the past 2 years is slowly increasing, which also seems to indicate that the quality of Chinese hydraulic valves has been recognized. Ten years ago, almost all Chinese hydraulic valves were supplied to domestic equipment manufacturers, and AAK began to provide samples for HydraForce. AAK hydraulic valves have indeed made a lot of progress in manufacturing / R & D in recent years, especially the export of high-pressure hydraulic valves. According to the data of Ningbo customs, AAK hydraulic valves account for more than 68%.

The rapid growth of AAK hydraulic valves is due to the strict ODM, operation specification and quality control process for these big brands, which is more strict than the ISO certification system. When we communicate with any hydraulic valve customer, we don't care much about the specific PO amount of a hydraulic valve, but focus on the cooperation opportunities with him, the supply relationship of common destiny, especially the market prospect.

AAK hydraulic valves have surpassed many peers in the market and research and development in recent years, but in the part of the market, especially in the mature developed market, there is a weakness in the market experience. Using AAK hydraulic valves manufacturing and R & D capabilities, combining with customers' industry experience and business creativity to jointly build a hydraulic valve supply chain system is our direction. It must be admitted that the way of thinking of European and American people in many commercial parts is worthy of our reference and learning. Therefore, AAK hydraulic valves expect to establish a business relationship of the community of common destiny with real hydraulic valve customers.

Today, the new generation of hydraulic valve practitioners in Europe and the United States has been separated from manufacturing for decades. Their difficulty is how to find a healthy, sustainable, guaranteed and common fate hydraulic valve supply chain and effectively realize the actual commercial delivery. Perhaps, China's small and medium-sized hydraulic valve enterprises and European and American small and medium-sized hydraulic valve enterprises will find a better combination of interests, and then jointly create new users, which may be a new trend of globalization in the future.

COVID-19 is impeding the development of globalization, but the globalization of hydraulic valves can not stop itself. The globalization of Chinese hydraulic valve manufacturers will not only stay at the level of hydraulic valve manufacturing and export. AAK is more concerned about how to make effective use of the favorable position of AAK hydraulic valve manufacturing and R & D, and then combine the business experience of the local market of developed countries to resort out and shape the innovative hydraulic valve business model, such as the software service module or platform of a hydraulic valve supply chain system.

If AAK uses our hydraulic valve manufacturing and R & D capabilities and customers use their own industry experience and business creativity, such a combination must be 1 + 1 greater than 2. Know + do = get. 99% of people didn't get it in the end because they didn't do it at all. Why not AAK hydraulic valves to do it? Here we are coming.......

AAK hydraulic valves, just change for you, with temperature from AAK hydraulic valves

Kayden, from AH Garner company in the UK, has successfully purchased hydraulic valve blocks in Ningbo in recent years, and has cooperated with AAK on some high requirements hydraulic valve blocks for many years. He sent an email at the end of last year: I need AAK’s help. After communication, we learned that a new hydraulic equipment of their company was complained by customers about oil leakage in about 3 months. After inspection, their after-sales personnel found that when the equipment is switched with high-speed and high-frequency action under high pressure, the small O-ring of the cover plate of the hydraulic valve block is prone to oil leakage. The engineer asked Kayden to find the original supplier to replace the hydraulic valve blocks or cartridge valves. Unfortunately, Kayden purchased the hydraulic valve blocks and threaded cartridge valves from two factories. The manufacturer of the hydraulic valve blocks replied that the thread size accuracy of the cartridge valves did not meet the standard and caused oil leakage, while the cartridge valve manufacturer said that the accuracy of the hydraulic valve blocks did not meet the standard.

The hydraulic valve blocks and cartridge valves have passed the inspection. How can there be a problem as soon as they are assembled on the equipment? Kayden suspected that the design of the hydraulic valve block was flawed, but the engineer thought the design drawing was in line with the principle. The customer didn't receive the solution, and complained to the boss, who asked Kayden to completely solve the oil leakage problem of the hydraulic valve blocks within 30 days. Now Kayden was stumped and didn't have a clue.

I asked Kayden to send us the drawings of the hydraulic valve block and cartridge valve, and system principles. AAK engineers found no problems after analysis. Our engineer asked Kayden to provide the video after the equipment was started up. Combined with the system schematic diagram and equipment fault video, our engineer judged that the position of installing O-ring at the interface of hydraulic valve block and cartridge valve was inappropriate. If the position of the O-ring is lowered, and the cover plate O-ring is completely free of oil, install and fasten the cartridge valve cover plate, and produce the hydraulic valve block and cartridge valve in a same factory, the oil leakage problem of the hydraulic valve block may be solved completely. Kayden seems to have seen the dawn and asked AAK to make samples.

After 25 days, AAK sent out the integrated hydraulic valve block sample. A few days ago, Kayden emailed us that it has been 3 months since the hydraulic valve block was replaced with AAK samples, the equipment works normally without oil leakage. Kayden told me that AH Garner engineer admired AAK’s strictness in details. It is so obvious, why didn't he find such an obvious problem?

In order to make sure that the integrated hydraulic valve block is 100% free of oil leakage, it is not only necessary to be strict on the position of the O-ring, but also the installation of the O-ring on the hydraulic valve block. On the premise of ensuring the reasonable compression of the O-ring, it is necessary to avoid oil in the annular sealing surface of the O-ring, and any displacement of the O-ring will be in an oil-free lubrication state, so as to improve the displacement resistance.

Kayden privately told us that the boss praised his quick and thorough solution to the problem, and asked him to purchase integrated hydraulic valve blocks from AAK in the future.

AAK hydraulic valve blocks, be strict in every detail, you are welcome to have a small try.

Zero from Italy often purchases hydraulic valve blocks. In previous years, his customer gave 95 days for delivery date. Some time ago, the customer had an urgent order for 1,200pcs of hydraulic valve blocks, and there was only 60 days from the sample of hydraulic valve blocks to delivery. For non-standard hydraulic valve blocks, the lead time is less than 30 days from drawing design, sample, service life test, production and delivery. Zero consulted all hydraulic valve block manufacturers in cooperation. They all said that it would take 60 days to complete the urgent order of 1,200 hydraulic valve blocks only for production, and the lead time in 90 days is necessary. Zero can't refuse the customer directly, so he has to find a new manufacturer of hydraulic valve blocks.

Zero also understands that it is not easy to find a reliable manufacturer of hydraulic valve blocks. Moreover, this is an urgent order, and the processing of hydraulic valve blocks is also complex. There was no reply from all the manufacturers he contacted on the Internet. Occasionally, he mentioned this urgent order of hydraulic valve blocks with his friend Caled. Caled introduced him to try AAK hydraulic valves. Caled is a customer that I have worked with for several years on integrated valve blocks. Caled told Zero that AAK helped him solve several urgent orders for manifolds, and the quality was guaranteed.

Zero said frankly that he was introduced by Caled and hoped to get our help. According to the drawing sent by zero, the hydraulic valve block has long and thin channels and complex oil circuit design, which is unbearable for general processing. AAK technical team first arranged the production procedure and calculated the daily output of hydraulic valve blocks. It would take 30 days to complete this urgent order. While Zero was pleased, he seemed a little worried about the quality of AAK hydraulic valve blocks. Three weeks later, their engineers tested AAK hydraulic valve block samples. The overall accuracy parameter of the hydraulic valve block is 5% higher than that of the original manufacturer, which proves what Caled has mentioned that AAK quality mentioned is guaranteed.

After working overtime for 30 days, AAK successfully completed the urgent order of 1,200 hydraulic valve blocks for Zero, which is half less than the 60 days of lead time required by peers. Zero was surprised how AAK achieved it?

AAK adopts the machining center of compound tools to combine two or more similar or different types of hole machining tools into one special tool. In the process of machining, reduce the tools required for machining X, Y, V and U partial views, and complete the process combination of multiple processes such as drilling, reaming, spot facing and boring. At the same time, one tool can simultaneously process threaded bottom holes, 45 °, 15 °, R0.1 chamfer and outer counter bore, which greatly improve the processing efficiency and have the characteristics of high efficiency, high precision and high stability. This is the reason why AAK completed the urgent order of these hydraulic valve blocks in only 30 days, while most hydraulic valve manufacturers can't control the processing technology of compound tools.

AAK hydraulic valve blocks, processed with compound tools, are not only with high precision but also high stability. Welcome you to have a try.

Petrov is an old purchaser of Hydrosila Group in Russia. He cooperates with AAK on some non-standard hydraulic pilot operated relief valves and often discusses some difficulties and complications of hydraulic pilot operated relief valves. In the second half of last year, they needed to purchase a hydraulic pilot operated relief valve to test an agricultural machinery equipment. Due to urgent time, Petrov purchased from a Russian hydraulic relief valve manufacturer, who delivered 30 hydraulic pilot operated relief valves in 30 days. During the test run, the hydraulic pilot operated relief valves screamed at about 1.5MPa before opening, as well as at the start and stop. Petrov contacted the manufacturer of the hydraulic relief valves, and the manufacturer replied that the non-standard customization was completely based on the drawings provided, and the dimensional accuracy also met the requirements. Their engineers independently tested the hydraulic relief valves and found that there was really no abnormality. The boss was dissatisfied with the one week of delay due to the test run and asked Petrov to repurchase the hydraulic pilot operated relief valves.

Because the hydraulic relief valve problems encountered before were solved by AAK, Petrov emailed me again. AAK engineer preliminarily judged that there may be problems in the design of the hydraulic pilot operated relief valve according to his fault description, the drawings of the pilot operated relief valve, the working parameters of the hydraulic system of agricultural machinery, and the video of the test machine. Knowing that he still has one month of flexibility, AAK can modify the original design of the hydraulic pilot operated relief valve and send 12 samples within 30 days. Four weeks later, AAK sent 20 samples of hydraulic pilot operated relief valves, which were installed and debugged without screaming, and the hydraulic power unit was started or closed for many times still without screaming.

Petrov was surprised that AAK engineer found and solved the problem of hydraulic relief valveS at one time, while the original Russian hydraulic relief valve manufacturer can do nothing?

Because the scream of pilot operated relief valve is often generated by high-pressure oil through damping hole or valve port, AAK engineer added inclined hole of valve seat and vibration elimination cavity in the original design. In this way, the dynamic and static characteristics of the hydraulic pilot operated relief valve can be improved, the screaming can be eliminated, the noise can be reduced, and the pressure control accuracy can be improved at the same time. AAK strong engineering team not only has the concept of German HAWE, but also has the experience of Italian Oil Control，the problem can be found at one time.

After the successful test run, Petrov privately told us that the boss was very satisfied that he found a strong manufacturer of hydraulic relief valves this time, which not only solved the problems that the original Russian manufacturer could not solve, but also made the price 30% cheaper. AAK will be his first choice for the test order of hydraulic relief valves in the future.

AAK hydraulic relief valves, super technical team, you can also have a small try!

Last Friday, James emailed that he would place an order for 1,200 hydraulic threaded cartridge valves for his last inquiry. This is the PO he sent to AAK after visiting 6 China hydraulic valve factories. It is a little surprised the first cooperation is 1,200 hydraulic threaded cartridge valves. James is from Spain. At the beginning of last year, he was assigned by the headquarters to the Guangzhou office to be responsible for the purchasing from China hydraulic valve factories. In early March, James sent an email saying that the epidemic policy of Ningbo can accept visitors. For the hydraulic threaded cartridge valve quoted last time, the headquarters asked him to visit the China hydraulic valve factories before placing an order. He planned to visit China hydraulic valve factories in Ningbo a few days later. AAK hydraulic valve is his first stop. Three days later, James came to AAK hydraulic valve and asked to visit the workshop directly instead of the office.

I took James to visit the whole production line of AAK hydraulic valve, from the first raw material inspection to the processing of hydraulic threaded cartridge valves, including heat treatment of semi-finished products, rough machining, finishing, cleaning, inspection of parts, assembly, inspection, packaging, warehousing and other processes. We also introduced the equipment and processing advantages and characteristics of AAK hydraulic valves. He looked the fixtures modified by ourselves for a long time. Two hours later, James said he would go to other China hydraulic valve factories and left AAK.

I'm not sure how many days he stayed in Ningbo and visited how many China hydraulic valve factories. I didn't know about his trip to Ningbo until his email last Friday. He visited 6 China hydraulic valve factories. I asked James why he chose AAK hydraulic valve to place an order after visit 6 China hydraulic valve factories and placed such a large order directly to AAK suddenly.

James replied that AAK is the most distinctive China hydraulic valve factory in China he has seen, mainly including the following details:

1、AAK advanced Swiss imported CNC machine tools, honing machines, CNC precision automatic lathes and pressure test bench impressed him deeply, especially those modified fixtures, which have not been seen in other China hydraulic valve factories.

2、AAK has 6 senior engineers in the industry, especially the hydraulic valves in the high-pressure category, with the concept of German HAWE, which makes him feel at ease about quality. AAK inspectors used a strong spotlight to check the valve hole, which made him refreshing. In particular, a few of those whose finish does not meet the requirements are picked out, which shows that AAK is harsh on quality. He has never seen such detailed inspection in other China hydraulic valve factories he visited.

3、Although the hydraulic threaded cartridge valve of AAK is about 10 ~ 20% more expensive than the other 5 China hydraulic valve factories, he believes that the service life of AAK hydraulic valves is 1 ~ 2 times longer than that of them.

China hydraulic valve factory, AAK has a cleanliness obsession in quality, which is even more QC than QC. You can also have a small try!

At 05:10 this morning, I was listening to music and browsing emails. Billy, who had no news in 9 months, sent an email. Without reading the email, I could guess that the hydraulic check valve developed by AAK for 3 months last year had a result. Opening Billy's e-mail and it is an annual order of 5,000 hydraulic check valves at one time, with about 500 hydraulic check valves delivered every month. Billy is from a hydraulic equipment company in the United States, he has purchased a small number of high-pressure resistant hydraulic check valves from AAK in the past. At the beginning of last year, his company received complaints from a customer that its high-power bulldozers were prone to weak starting of the hydraulic system after being used in less than half a year. The after-sales engineer found that the hydraulic check valves leaked and can not maintain the pressure and caused the problem.

Billy contacted the original manufacturer of the hydraulic check valves, and manufacturer advised that the system pressure of the high-power bulldozer exceeded 450bar, and the opening and closing frequency was also high. When the hydraulic check valve was in the high-pressure state above 450bar, the valve spool was worn quickly, and the service life could only be guaranteed as 1 million times. Therefore, it was normal to replace the hydraulic check valves every half a year. If you want a hydraulic check valve with a service life of 2 million times, you can only purchase it from German HAWE. Billy has no choice but to make do with the hydraulic check valves of the original manufacturer first, but the after-sales cost every half a year is really unbearable. Maybe other manufacturers can offer hydraulic check valves with service life more than 1 million times. Billy began to contact other factories, including AAK.

After receiving Billy's email, AAK engineers had reached a conclusion according to the hydraulic check valve drawings and bulldozer working parameters. In order to exceed the service life of 2 million times of the hydraulic check valves, we can only test new high-pressure resistant materials. We replied Billy at that time that according to the existing steel options of AAK, what your original manufacturer said was right, it can only guarantee the service life of 1 million times of the hydraulic check valves. However, we are confident to develop the one of 2 million times, because we have our own R & D experience in anti-high pressure.

Billy replied directly that AAK would be given 3 months to sample the hydraulic check valves with pressure resistance above 450 bar. He also frankly informed that two other hydraulic check valve manufacturers were also making samples. If all manufacturers fail, they can only buy high-pressure hydraulic check valves from German HAWE. Three months later, AAK successfully sent 20 hydraulic check valve samples to Billy. Nine months later, the email came from Billy today. Billy noted the sample testing results in the email. The bulldozer equipped with AAK hydraulic check valve was still normal after 9 months, while the hydraulic check valves from another two manufacturers were eliminated in the 6th and 8th months.

AAK hydraulic check valve has a pressure resistance of more than 450 bar and a service life of more than 2 million times, because:

1. AAK has engineer who have worked in the Shanghai factory of German HAWE for 11 years and has experience in high pressure resistance.

2. We have tested more than 20 kinds of steel and selected the most suitable 35CrMo steel to produce the valve spool of this hydraulic check valve.

3. Good materials also need good processing. The heat treatment method adopted by AAK for 35CrMo alloy steel is 845 ℃ annealing, 860 ℃ quenching (oil quenching) and 200 ℃ low temperature tempering. After this special heat treatment, its hardness and wear resistance are increased by at least 50%.

AAK hydraulic check valve, can resist pressure of more than 450bar, you can also have a small try!

This morning, Joselito sent an email asking about the production time of 1,000 hydraulic manifold blocks, which surprised me a little, because in the past two years, Joselito has basically placed orders for just hydraulic valves only, but very few for the hydraulic manifold blocks. Joselito is a purchaser of BEZARES company in Spain. We met 2 years ago. After communication, it was learned that he encountered problem on the hydraulic manifold blocks purchased this time.

A batch of hydraulic winch equipment of their company was complained by some users that the winch was often weak. Their after sales found that the hydraulic manifold block was leaking. Because of the purchase cost limitation, he disassembled the hydraulic manifold blocks and purchased them separately from 3 hydraulic valve manufacturers. Now the leakage problem of the hydraulic manifold blocks has come, all 3 manufactures prevaricate and are not responsible for the oil leakage of the hydraulic manifold blocks, they thought that the problem was caused by the unreasonable design or the wrong installation method of the hydraulic manifold blocks. The engineer checked the hydraulic manifold blocks one by one and found different problems, some sealing ring was broken, some gasket at the interface was worn, and some has iron filings in the valve hole. In the past year, a lot of money, labor and maintenance costs were spent on the after-sales for the hydraulic manifold blocks. Now the customers are not satisfied with their after-sales performance, and the boss is not happy to spend the after-sales money indiscriminately. Joselito has a big headache.

AAK suggests that Joselito should purchase the whole hydraulic manifold blocks in one factory as much as possible, because each hydraulic valve manufacturer has different quality positioning. AAK has now received more and more inquiries for hydraulic manifold blocks, including Skyjack, a Canadian listed company, and Brevini, a top company in the field of transmission.

Joselito finalized the purchase contract of the hydraulic manifold blocks with AAK in two rounds, and required that AAK hydraulic manifold blocks should not be reported for repair within 1 year. It is not only the hydraulic valves and hydraulic manifold blocks produced by AAK with quality assurance, but also 3 points that are difficult for peers to do well:

1. AAK shall deeply clean the hydraulic manifold blocks before assembly to ensure that it is 100% free of iron filings, dirt and other impurities.

2. Only technicians with more than 10 years of experience are qualified to assemble, check the matching between the duct and the hydraulic schematic diagram, and test the accuracy of each duct to ensure that the sealing ring of the hydraulic valves will not be damaged. After assembly, use the test bench to debug the hydraulic manifold blocks for many times, including pressure test and function test, to ensure that the action function of the circuit is accurate and reliable. Such technicians and such operation procedures may not be found in the 3rd hydraulic valve manufacturer in Ningbo.

3. AAK technical team has engineers from the world's top 500 hydraulic manifold block enterprises. They have their own experience in material selection, production drawing design and production line quality control.

AAK hydraulic manifold blocks are not only professional, welcome to have a small try!

AAK hydraulic valve blocks are processed with compound cutting tools, and the production efficiency is nearly 50% higher than that of peers. At the same time, the precision of hydraulic valve blocks is also improved by 5%. AAK completed the urgent order of 1,000 hydraulic valve blocks in only 30 days, while most hydraulic valve block manufacturers can't control the processing technology of compound cutting tools. German customers are also attracted by it.

It's a little strange that since the second half of last year, many inquiries about hydraulic valve blocks have an urgent delivery date. They need to be shipped within 20 days or finished within 30 days. For non-standard hydraulic valve blocks, from production drawing design, sample, life test, production to delivery, the vast majority of hydraulic valve block manufacturers need 45-60 days. But this is desperate for the customers with urgent order of hydraulic valve blocks, and Bach in Germany is one of them.

Bach wanted to purchase 1,000 pcs of hydraulic valve blocks a few weeks ago. His customer requested that the goods be delivered to Germany in 50-60 days, but the quotation of the local factory in Germany exceeded his budget. He could only find the manufacturer of hydraulic valve blocks in Ningbo, that is, goods need to be shipped in 30 days. Bach contacted nearly 20 hydraulic valve block manufacturers, but none of them can complete the production of 1,000 hydraulic valve blocks in 30 days.

A few days ago, we received Bach's message on AAK website (www.aakindustry.com): I saw an article on B2B that "AAK processes hydraulic valve blocks with compound cutting tools, and the delivery time is 30 days faster than peers". Can AAK complete non-standard hydraulic valve blocks in 30 days? After communication, I learned that Bach was troubled by the delivery date of hydraulic valve blocks. I directly told him that the 30 days of lead time for 1,000pcs of hydraulic valve blocks is enough for AAK.

AAK adopts the compound cutting tool processing technology that most hydraulic valve block manufacturers can't control, that is, combining two or more similar or different types of hole processing tools into a special composite tool. In the process of machining, reduce the tools required for machining X, Y, V and U partial views, and complete the process combination of multiple processes such as drilling, reaming, spot facing and boring. At the same time, one tool can simultaneously process threaded bottom holes, 45 °, 15 °, R0.1 chamfering and external counterbore, which greatly improve the processing efficiency and have the characteristics of high efficiency, high precision and high stability. This is the "trump card" of AAK to improve the production efficiency. The production efficiency is nearly 50% higher than that of its peers. At the same time, the precision of hydraulic valve blocks is also increased by 5%.

Five days later, the hydraulic valve block sample was successfully sent out. Less than a week later, Bach told AAK that the test results of the hydraulic valve block made him admire. The technical parameters of AAK hydraulic valves have caught up with the local factory in Germany, but the price is 30% cheaper, and the delivery is more than 30 days faster. The sample was approved for mass production at the first time, and the hydraulic valve blocks were shipped smoothly after 30 days.

AAK hydraulic valve blocks, processed with compound cutting tools are not only fast, high precision but also stable. You are welcome to try the order.

Isacco compared more than 10 hydraulic manifold factories. No manufacturer can achieve the light hydraulic manifold with pressure resistance of 450MPa, and AAK successfully completed the sample at one time. At the beginning of last year, Isacco’s company developed an aviation hydraulic power unit, which is the first time for SICMI company to try aviation equipment. Their customer specially mentioned that the hydraulic manifold should withstand a high pressure of more than 450MPa, especially pay attention to the weight of the hydraulic valve block, because the aviation equipment has strict restrictions on the weight of each part, and this hydraulic valve block must be made of ultra light aluminum.

Isacco got the purchase list of hydraulic manifolds. First, he contacted the current hydraulic manifold manufacturers. Only 3 manufacturers agreed to try samples, and other manufacturers gave up. 1 month later, Isacco successively received the hydraulic manifold samples. After installation and commissioning, the high pressure resistance test of the hydraulic manifolds from 2 factories failed. Although the pressure resistance test of the hydraulic manifold of the 3rd factory was successful, its weight was more than 20% higher. Isacco asked the 3rd hydraulic manifold manufacturer to re-sample, but the manufacturer advised that 7075 aviation aluminum is the lightest material. Isacco had to look for new hydraulic manifold manufacturers again. He contacted more than 10 hydraulic manifold manufacturers successively, but there was basically no feedback.

Isacco left a message on AAK website: Does AAK have lighter materials than 7075 aviation aluminum to produce hydraulic valve blocks? With this message, we understand that this hydraulic manifold should be used in aviation, not only light, but also resistant to high pressure above 450MPa. According to the hydraulic manifold drawings and working condition requirements provided by Isacco, frankly speaking, our engineers have no ideas, because 7075 aviation aluminum is the preferred material for our production of high-pressure hydraulic valve blocks.

AAK hydraulic valve just likes the development instructions given by customers, which are not involved in AAK before. We are willing to cooperate with Isacco to crack a hard nut of this hydraulic manifold. AAK spent more than 2 months comparing aluminum materials for 12 times and selecting a material lighter than 7075 aviation aluminum after trying samples for 3 times. Isacco received AAK hydraulic manifolds and conducted pressure test. One week later, Isacco asked about the production time of 600 hydraulic manifolds and told us that AAK was the only hydraulic manifold manufacturer that passed the test, with a pressure of 450Mpa and a weight that met the requirements.

Why only AAK can achieve hydraulic manifolds with high pressure resistance and light weight?

1. AAK hydraulic valve has an engineer who has worked in the Shanghai factory of Germany HAWE for 11 years and has unique experience in high pressure resistance.

2. AAK has material engineers who is specially responsible for screening, comparison, testing and docking with the Research Institute.

3. This material is independently developed in China, a patented high-strength multi-element microalloyed cast aluminum alloy. It has light texture, strength up to 480-540Mpa and hardness ≥ HB140. It is the preferred material for the core components of aviation equipment.

Last week, Isacco privately informed that the customer has a very good sales and would place a big order again. His boss was very satisfied with his last procurement performance. After working for 3 years, he was finally promoted to procurement manager.

AAK hydraulic manifolds, can be used in aviation, you can also have a small try!

This morning, Mason sent an email asking about the production time of 2,000 hydraulic relief valves, which surprised me. Usually, he just places small trial orders of hydraulic relief valves. He is going to place a large order this time. Mason is a purchaser of BRACEBRIDGE company in Canada. We have known each other for 2 years. After communication, it was learned that a batch of their hydraulic pipe laying rigs had been complained about the frequent leakage in the hydraulic pump since the previous year. The after-sales engineer found that the cavitation was caused by the oil passing through the hydraulic relief valves for a long time, resulting in the pressure loss of the hydraulic cylinder. Mason contacted the original manufacturer of the hydraulic pressure relief valves to find a solution. The manufacturer advised that such a working environment can only replace the hydraulic relief valves with cavitation. The trouble is that the same problem happened again half a year later. The customer was very unhappy with this frequent after-sales, and the boss asked Mason to replace the manufacturer of hydraulic relief valves.

Mason told his boss that there is no reliable manufacturer of hydraulic relief valves to replace the present one. For the sake of safety, AAK hydraulic relief valves should be selected. Because there was equipment installed with AAK hydraulic relief valves when testing samples at the beginning. Now 1 year later, there is still no cavitation on AAK hydraulic relief valves. But the price of AAK hydraulic relief valve was 17% higher than that of other manufacturers and was not selected. The boss rejected again and asked Mason to find a new manufacturer of hydraulic relief valves. During the continuous screening process, Mason selected 3 hydraulic relief valve manufacturers to test samples. Basically, after half an year, these hydraulic relief valve samples successively had similar faults.

Mason was at a loss what to do. He once again suggested to his boss to purchase AAK hydraulic relief valves. After comparing so many hydraulic relief valve manufacturers, none of their samples can be used for more than 1 year under this working condition. In this way, the hydraulic relief valves need to be replaced every 6 months for after-sales. Not only the after-sales cost is high, but the customer is also not satisfied. The boss seems lost faith completely in other hydraulic relief valve manufacturers and agreed with Mason to regard AAK as their preferred supplier of hydraulic relief valves.

It took Mason 2 years to persuade his boss to choose AAK hydraulic relief valves with 17% higher price, because he knows that the durability of AAK hydraulic relief valves is at least twice that of other manufacturers. Under complex working conditions, how does AAK ensure that the hydraulic relief valves have no cavitation and its durability is more than twice that of other manufacturers?

1. AAK hydraulic relief valve sleeve orifice processing, the opening adopts conical hole, not cylindrical hole of other manufacturers. Most hydraulic relief valve manufacturers do not have this ability to process conical hole.

2. The chamfering, deburring and polishing process is added at the orifice to further optimize the control edge, so as to reduce the cavitation caused by the flowing oil, and at least eliminate the cavitation within 2 years. Most hydraulic relief valve manufacturers did not expect that AAK has such a unique skill.

3. Devils are in the details. Most hydraulic relief valve manufacturers will ignore small details. Even if some factories think of them, they can't control the technology.

AAK hydraulic relief valves, pay attention to every small detail, you can also have a small try!

Christopher is from Italian hydraulic company Hydr-app S.p.a. and responsible for the procurement of Beijing office. At the beginning of last month, he wanted to purchase a batch of hydraulic flow control valves urgently from AAK, because they had a batch of hydraulic power units sold to Southeast Asia that needed to replace the hydraulic flow control valves. At the beginning of last year, considering the cost and supply, his boss purchased the hydraulic flow control valves from China, which were originally purchased from Brevini locally. At the beginning, AAK also participated in the sampling of hydraulic flow control valves, but was cancelled because the quotation of AAK was more than 25% higher than that of other hydraulic valve manufacturers. Half a year later, they were complained several times that the hydraulic flow control valve leakage led to the unstable pressure of the hydraulic power unit. The original manufacturer replaced some hydraulic flow control valves, but 6 months later, similar complaints happened again, that is, the stability of these hydraulic flow control valves was only 6 months.

Christopher found that the AAK hydraulic flow control valve samples have been normal for more than 1 year, which is as stable as the Brevini hydraulic flow control valves they purchased before. He persuaded the boss to buy from AAK. Although the price was more than 25% higher than other hydraulic valve manufacturers, but it was about 30% cheaper than that of Italy Brevini. More interestingly, the stability of AAK hydraulic flow control valves were not only more than twice that of its peers, but also benchmarked Brevini.

Christopher wants to find out why the hydraulic flow control valves of every factory samples are qualified at the beginning. Six months later, except AAK, all other hydraulic flow control valves will leak and affect the stability. The leakage of hydraulic flow control valves after half a year is mostly due to the wear of parts, that is, the unstable surface hardness of materials during heat treatment. Most manufacturers adopt conventional heat treatment, which has advantages in processing cost. How does AAK do it?

1. AAK hydraulic valve has its own heat treatment plant, which can adopt different heat treatment methods in quenching, carburizing and nitriding according to different contents of steel. AAK can achieve the aging temperature of 420 degrees, heat preservation of more than 10H, and can also obtain the material hardness of 65HRC.

2. The core component materials of AAK hydraulic flow control valves use the industry's most advanced EFD Induction Sinac heating power supply for induction heat treatment, with less oxide scale and small deformation. The workpiece is quenched and locally heated accurately to make the surface hardness of each processing element consistent.

3. In the later stage, AAK test the hardness of each part of the hydraulic flow control valves point-to-point. SonoDur3, a Rockwell hardness tester imported from Germany, is used to perform nondestructive testing efficiently and accurately.

The Italian customer said that the stability of AAK hydraulic flow control valves was benchmarked with Brevini. You can also give it a try!

This morning, I received the order of 2,000 hydraulic needle valves from Charlotte. At first, I thought she sent the email by mistake, because Charlotte had no cooperation with AAK, we just discussed the inquiry for her hydraulic needle valve with pressure resistance of 450bar for 3 times. It is the first time I met a hydraulic valve customer who placed a big order after 3 times of communication. I asked her directly why she gave AAK such a large quantity of hydraulic needle valves order in only the first cooperation. Charlotte said that this hydraulic needle valve was purchased from HAWE in Germany 3 years ago, because HAWE is the best manufacturer of high-pressure hydraulic valves in the world.

Charlotte is from a hydraulic equipment company in Spain. Last month, their company tried to purchase this high-pressure hydraulic needle valve from Ningbo, which is the hometown of hydraulic valves in China. She has a hydraulic valve supplier who has cooperated for 5 years and has high mutual trust. Due to the special requirements and urgent delivery date of this hydraulic needle valve, the original hydraulic valve supplier was unable to bear it, so he suggested Charlotte contact AAK, and joked that if AAK could not complete this hydraulic needle valve, she should not waste more time in Ningbo, but go back to HAWE to purchase the high-pressure hydraulic needle valves.

I received the drawings and working condition requirements from Charlotte. This customized hydraulic needle valve is applied to aviation equipment. The working condition pressure is required to reach 450bar. It is required to be delivered within 50 days. The quality needs to be comparable to that of HAWE in Germany. Just like Ningbo counterpart said, in Ningbo, there may not be a second manufacturer who is able to produce this high-pressure hydraulic needle valve except AAK hydraulic valve.

Charlotte was curious about why the Ningbo counterparts recognized AAK high-pressure hydraulic needle valves so much, and AAK was also so confident in its own high-pressure hydraulic valves. What is the strength of AAK high-pressure hydraulic needle valves? Like horse racing, if you want to win the gold medal, then a good horse should be equipped with a good saddle and a good rider. What are the good horses, saddles and riders of AAK? If you need to meet the following 3 points at the same time, you may not be able to find a second hydraulic valve manufacturer in Ningbo to produce high-pressure hydraulic needle valves, except AAK hydraulic valve.

1. Good horses: AAK has high-precision machine tools imported from Switzerland, Mikron GF high-precision CNC machining center and GILDEMEISTER turn milling composite machining center.

2. Good saddles: AAK has full-time material engineers in material selection, who are specially responsible for screening, comparison, testing and docking with the Research Institute. According to the working conditions of the hydraulic valves, the suitable materials are matched pertinently, not to use the general materials in the market.

3. Good riders: special personnel shall be assigned to operate the special machine in key processes. Only technicians who have worked in the workshop for at least 5 years can take up the post. There are engineers from Shanghai factory of Germany HAWE, who have worked there for 11 years. They know all the production and processing technologies of HAWE factory back to front. They can fully benchmark HAWE factory in terms of material selection, process formulation, production line control, quality inspection and other processes.

Charlotte can’t refuse the 3 unique advantages of AAK high-pressure valves and confirmed the PO in 2 days with AAK. A single flower does not make a spring. The improvement of products may not just due to market competition, but also the improvement of the level of the whole industry. AAK leads Ningbo hydraulic valve manufacturers to jointly face the high-pressure hydraulic needle valves.

AAK high-pressure hydraulic needle valves are recognized as a leader in the industry by counterparts. Welcome to have a small try!

Jone is a hydraulic customer from the United States. His company has recently developed a hydraulic relief valve suitable for machines with high impact and high load. Because of the high requirements of working conditions, the steel used for the hydraulic relief valve has not been approved yet. They have been testing in the local hydraulic relief valve manufacturers in the United States for several weeks. Due to the high cost of proofing in the United States, they want to turn to Chinese hydraulic relief valve manufacturers for sampling and testing.

Jone compared more than 10 hydraulic relief valve manufacturers and selected 3 to make samples. After receiving and testing the samples of hydraulic relief valves, none of them can meet the requirements of service conditions, and the test results are much worse than those of local manufacturers in the United States. Although these 3 hydraulic relief valve manufacturers changed the materials and improved the parameters, the toughness and plasticity of the steel still did not meet the working conditions, and Jone and his team were at a loss what to do.

His friend Tom recommended him to contact AAK hydraulic valve for a try. Jone sent us an email with a try attitude. According to his hydraulic relief valve drawings and the working conditions with large impact force and high load, our engineers were not 100% sure, but were 90% sure, giving 2-3 weeks.

Two weeks later, AAK successfully sent 6 hydraulic relief valve samples. On the 3rd day after Jone received the hydraulic relief valve samples, we received an email that the samples of hydraulic relief valve passed the performance test. AAK spent 2 weeks to try over 10 kinds of steels, and finally determined to replace 40Cr with 35CrMo steel. The high toughness and plasticity parameters of 35CrMo well match the working conditions of this hydraulic relief valve. At the same time, 35CrMo has high static strength, impact toughness and high fatigue limit, and the long-term working temperature can reach 500 ℃. Jone was surprised that the samples of more than 10 hydraulic relief valve manufacturers in China were not successful. Even if the local manufacturers in the United States spent 4 weeks but still failed, how can AAK succeed in 2 weeks one time?

The reason why AAK hydraulic relief valves can do what the domestic factories in the United States failed to do, because:

1. AAK has full-time material engineer who is specially responsible for material screening, comparison, testing and docking with the materials research institute.

2. Good materials also need good processing. The heat treatment method adopted by AAK for 35CrMo alloy steel is 845 ℃ annealing, 860 ℃ quenching (oil quenching) and 200 ℃ low temperature tempering. After this special heat treatment, its hardness and wear resistance are increased by at least 50%.

3. AAK technical team has engineers from the global top 10 hydraulic valve industry. They have their own experience in material selection, production drawing design and production line quality control.

AAK hydraulic relief valves, high load and high impact resistance, you can also have a small try!

I've been working on hydraulic valves for 13 years, but I never say I've focused on hydraulic valves for 13 years.

13 years of hydraulic valve career, has been adhering to. I think no matter what you do, 10 years is a cycle, because only 10 years of persistence can make some small achievements, but they are only small achievements, which can't catch up with success. There must be compound interest in long-termism, but it does not mean that we should do it mechanically in the 10 years and then wait for the arrival of the cycle moment of the 10 years. It's impossible for me to stick to the industry for 10 years if without orders coming one by one in the daily working time, absolutely not possible. Therefore, long-termism is to produce hydraulic valve orders, while making hydraulic valve innovation at the same time. After 10 years of deliberate learning, pondering and imitating the major brands of international first-line hydraulic valves, we can make some small achievements at the time of the arrival of 10 years.

AAK hydraulic valve is not a big brand. I never imitate the words of "lyrical romance" of big brands. Instead, I insist on what benefits AAK hydraulic valve can bring to users, what problems have been solved and what pain points have been solved, that is, the difference of AAK hydraulic valve function and performance from its peers.

It has been 13 years since I started my business. 70% of the hydraulic valve customers come from the network and 30% of the customers come from the introduction of these 70% customers. My idea is like this:

1. Never burn money to advertise hydraulic valves. Almost all of them are free promotion at the cost of a lot of time and energy. There seems to be no holiday in a year. I have to work for about 12 hours every day. Because I'm stupid, I can only do a little every day, but I never stop.

2. Focus on the cartridge hydraulic valves, a single large category, which has been used in the hydraulic system in the fields of engineering machinery, agricultural machinery, field exploration and aviation flight. It is positioned for high-end customers who pay attention to quality and never produce the market common quality.

3. For the raw materials and semi-finished products, process and technology, production equipment and production line control of hydraulic valves, I dare not say I am proficient in these 4 parts, but at least at the level of assistant engineer. This is the basic skill and hard work of doing content.

4. Like to output the content of hydraulic valves, write the content that customers want to see and will see, so as to attract real hydraulic valve customers and help customers solve problems, even if they give customers a "so it is".

5. Mindfulness to be a man and to do things. I never believe in the concept of "treat the company as your family", which either cheat employees or cheat yourself. In my understanding, mindfulness is not to cheat, or make small movements under the table.

It is not difficult to improve the quality of hydraulic valves, and it is difficult for me to understand why some hydraulic valve manufacturers like producing market goods. As long as the cost of raw materials and semi-finished products is increased by 5 ~ 10%, the quality of hydraulic valves can be greatly improved. I don't know, why can't these bosses change? AAK hydraulic valve adheres to the top 1% of the subdivided market. At the same time, it aims at the global first-line hydraulic valve brands in terms of quality, first benchmarking them, and then surpassing them. With 13 years of long-termism and being the ODM factory of the global top 10 hydraulic valve brands for many years, AAK has been able to surpass the international first-line brands in terms of export quality and price.

AAK hydraulic valve, never cheating or doing small movements under the table

Some peers left a message after seeing the article "making mistakes is either bleeding or death. AAK hydraulic relief valve can't call mistakes as low level mistakes" on AAK hydraulic valve website: does AAK hydraulic valve never make mistakes? This is a good question. To err is human. Not to mention a multi person organization. AAK hydraulic valve can make ignorant mistakes, but it can't make arrogant mistakes.

What is the ignorant mistake? I haven't done this before. I don't know how to do it. I found that I made a mistake. If this error occurs in AAK hydraulic valve, we are willing to pay or encourage it. Why encourage mistakes?

1. Because you know you are ignorant, you won't invest too much in it. The cost of making ignorant mistakes is controllable.

2. You are ignorant this time, you will know next time. You will summarize and review. This is the process of learning. AAK hydraulic valve encourages employees to make ignorant mistakes and they grow up quickly.

AAK hydraulic valve can not make arrogant mistakes. What is arrogant mistake?

For example, engineer A said that I know too well about this hydraulic valve. I've been clutching my hand for a long time. It's all experience. Once it's this attitude, it's over. Because of A's arrogance, it's easy to take it for granted to do this hydraulic valve.

In the production process of AAK hydraulic valves, it has always been emphasized that the most grass-roots managers have the final say. I don't want the production director to have too much power, the production boss to have too much power, and the chief engineer to have too much power. Grassroots managers, who are immersed in the specific operating procedures of hydraulic valves, know how to do better than you. AAK senior managers of hydraulic valves discuss with them to provide some experience in the hydraulic valve industry and give them some suggestions.

For example, although I don't operate the hydraulic valves or specific things in the company, I like to make suggestions and ponder. If the suggestion I mentioned, the idea, can inspire them, then use it. If you don't think so, let it go.

In AAK hydraulic valve, if things are not done well, first admit your ignorance and don't be arrogant. What really causes us trouble is not what we don't know, but what we think we know. Only by maintaining a spirit of exploration can it become a biological tissue and grow freely. Only in this way, AAK hydraulic valve can have a future.

AAK hydraulic valve, zero tolerance for arrogant errors.

Rodriguez is a senior purchaser of a hydraulic equipment company in Mexico. The boss is very satisfied with his work. In the second half of last year, they needed to launch a new hydraulic equipment, which needed to use hydraulic relief valves. The boss asked that the procurement cost of the hydraulic relief valves should be reduced by 15% on the premise of ensuring the quality. He contacted the original American hydraulic relief valve manufacturer, and the manufacturer replied that it was impossible. In desperation, he had to find a new manufacturer of hydraulic relief valves.

Rodriguez has participated in the Shanghai PTC exhibition and collected some hydraulic relief valve manufacturers, which have great advantages in terms of price. The quotation of some hydraulic relief valve manufacturers is only half of that of American manufacturers, and the quotation of some hydraulic relief valve manufacturers is 60% cheaper than that of American manufacturers. He is a little surprised that there is such a big difference in the quotation of different manufacturers for the same hydraulic relief valve. They began to test the parameters of the hydraulic relief valves from 3 manufacturers, but did not require AAK to send samples, because the price of AAK was 20% - 30% higher than that of other manufacturers.

A month later, the hydraulic relief valve samples from the 3 factories were tested and they all failed to meet the indicators of American manufacturers. The pressure of some hydraulic relief valves could not rise within a few days after the equipment was installed. Rodriguez initially screened the manufacturers of hydraulic relief valves and used the 3 factories with low prices. Maybe it proves that Cheapest is the dearest. He changed his strategy and used the hydraulic relief valve manufacturers with relatively high quotation to test the samples. AAK offers the highest price, but it is still about 30% cheaper than American manufacturer. At the same time, AAK promised that the quality could fully match that of American manufacturer.

According to the hydraulic relief valve drawings and working condition information provided by Rodriguez, AAK sent the samples of the hydraulic relief valves after 25 days. A month later, Rodriguez sent an email that AAK hydraulic relief valves passed the test, and the parameters were benchmarked with those of the original American manufacturer, and even some details and appearance were visually more exquisite than those of the American manufacturer.

He would like to know how AAK makes hydraulic relief valves that surpass American manufacturers?

1、AAK has a high-precision CNC machining center imported from Switzerland and various independent fixtures upgraded and refitted by itself, which eliminates human errors and avoids faults such as stuck valve spool of hydraulic relief valves.

2、AAK adopts the ultrasonic cleaning machine imported from Japan to scrub the solid surface through the vibration of gas bubbles, so as to clean each hydraulic relief valve part for 100% without leaving any residue.

3、AAK test equipment has 5 pressure test benches that of each can be operated independently, and each test area is equipped with professional inspectors, so as to ensure that each hydraulic relief valve is qualified before shipment.

AAK hydraulic relief valves, the details can surpass those of American manufacturers. You are welcome to have a small try!

Elijah is from a Canadian hydraulic equipment manufacturing company. At the beginning of this year, he encountered trouble. A batch of excavators sold by his company to Southeast Asia needed to replace the hydraulic directional valves. The main reason is that the hydraulic directional valves have been used for a long time, and it is time to replace them. The trouble is that these non-standard hydraulic directional valves from HydraForce in the United States were out of stock at the end of last year, and Elijah did not fill the inventory in time. Elijah urgently contacted the original hydraulic directional valve supplier, because these hydraulic directional valves are non-standard and were produced 2 years ago, the original supplier has no inventory now. If they are customized again, 1,000 MOQ will be required, and the production time will be 2months. Elijah fed back the information to the boss, who was angry because 60% of their company's orders came from this customer every year, and Elijah had a big headache.

In order to solve the problem of time, Elijah tried to contact the hydraulic directional valve manufacturers close to Southeast Asia. The hydraulic directional valve manufacturers in China are his first choice. Elijah found AAK hydraulic valve on Google. After receiving the email, we compared the hydraulic directional valve drawings provided by Elijah. This hydraulic directional valve is not a conventional product, but he only gave a delivery time of 30 days, and the quality of hydraulic directional valve must be compared with that of HydraForce. We are worried about not the quality requirements, but the production time. Due to the particularity of this hydraulic directional valve, the process design and programming need a lot of time to complete the matching. In addition, the heat treatment and surface treatment of parts, assembly inspection and commissioning and other processes all need time. Elijah had to bite the bullet and accept our request for 40 days of delivery time.

Fortunately, the design and production of this hydraulic directional valve were very smooth. 30 days later, AAK sent 50 hydraulic directional valves to Elijah's Southeast Asian factory. A few days ago, Elijah sent an email to thank AAK. Fortunately, AAK hydraulic directional valves helped him solve his urgent need. Elijah asked us how we did it. He successively contacted more than 20 hydraulic directional valve manufacturers. They all fed back that either the delivery time was too short or the quality could not be benchmarked with HydraForce. AAK is the only Chinese hydraulic directional valve manufacturer, who promised that the quality would be benchmarked with HydraForce, and the delivery date is also within 30 days.

I told him that for this non-standard hydraulic directional valve, AAK has 3 points that are difficult for the other manufacturers to match with:

1. AAK is a supplier of HydraForce for 9 consecutive years, and the quality benchmarked Hydraforce is the least worth mentioning guarantee.

2. We have a high-efficiency MIKRON machining center and AMEC sinking drilling and milling cutter with central internal cooling, which allows faster cutting. In this way, human errors are eliminated in accuracy and efficient production is ensured.

3. AAK has been ODM manufacturer for 3 Fortune 500 companies for 10 years, with strict quality control process and self-implementation stricter than ISO certification system, and never relax the requirements to ourselves, stick to the details and constantly optimize the technology.

AAK hydraulic directional valve is the first choice for customers in North America. You are welcome to give it a try!

There is a spread in the hydraulic valve industry: those who can do a good job in hydraulic valves may not be able to do a good job in hydraulic manifolds; those who do a good job in hydraulic manifolds, and basically can do a good job in hydraulic valves. Baptiste is from DMH France. The hydraulic manifolds purchased in Italy before was transferred to the hydraulic valve manufacturer who has cooperated for 4 years. However, he suffered from the 4 times a year after-sales of hydraulic manifolds. In the second half of last year, Baptiste purchased 30 hydraulic relief valves from AAK, which is the 4th time of purchasing in the year, and the quantity is the same every time. It is a little strange. After communication, I learned that a hydraulic equipment developed by them at the beginning of last year has stains on the hydraulic oil every few months, resulting in the jamming of the hydraulic relief valves. The replacement of 4 times a year keeps the customer complaining.

According to Baptiste's description, the probability is that the hydraulic manifold design is improper. I suggested that he send us the hydraulic manifold drawing and system schematic diagram. Baptiste said that the hydraulic manifold drawing and system schematic diagram are confidential documents and he must get approval from boss before sending them to AAK. Three days later, Baptiste sent us the hydraulic manifold drawing and system schematic diagram, requiring that they should not be revealed to any other people. According to the analysis of the drawings, AAK engineers found that when the hydraulic power is input and the system does not start working, the hydraulic relief valve does not reach the opening pressure and cannot relieve the pressure, resulting in the increase of oil temperature and easy oil pollution. It is certain that the problem lies in the design of hydraulic manifold.

I suggest redesigning the hydraulic manifold. The idea is as follows: AAK will change the 2 hydraulic relief valves on the hydraulic manifold block to use the hydraulic directional control valve alone, and change the oil circuit design. The principle is as follows: when the hydraulic system works, the hydraulic directional control valve cuts off the oil circuit, making the high-pressure oil enter the working branch. When the hydraulic system stops working, the high-pressure oil directly returns to the oil tank after passing through the directional control valve to realize zero pressure unloading. If the hydraulic manifold designed by AAK is not improved, no fee will be charged. Baptiste was a little interested after learning that. 45 days later, AAK sent a new hydraulic manifold. 4 weeks later, Baptiste informed by email that the hydraulic manifold of AAK had been used for 1 month, the hydraulic oil had no pollution, the whole hydraulic system was more sensitive, and the problem that had plagued them for 1 year was solved at one time.

AAK hydraulic manifolds had been tested for first-line brands since 7 years ago. If meeting the following 3 points at the same time, there may be no second hydraulic manifold manufacturer in Ningbo except for AAK:

1. AAK technical team has engineers from the world's top 500 hydraulic manifold enterprises. They have their own experience in material selection, production drawing design, oil circuit design and production quality control.

2. Before hydraulic manifold assembly, the valve block shall be deeply cleaned to ensure 100% impurity free. Each valve shall be tested.

3. Only technicians with more than 10 years of experience are qualified to assemble the hydraulic manifolds. After assembly, use the test bench to debug the hydraulic manifolds for many times to ensure that the act function of the circuit is accurate and reliable.

Baptiste privately informed that the boss was very satisfied that he found a reliable hydraulic manifold manufacturer, solved the after-sales troubles of the whole year, and could be promoted to the manager of the procurement department next month. Baptiste was so happy.

AAK hydraulic manifold block is professionally designed to save you worry and effort. You can also have a small try!

Last week, Grayson issued a reorder for 120 hydraulic pressure reducing valves. Grayson is our Canadian customer. He has been engaged in hydraulic parts procurement for many years, and his colleagues trust him. In the second half of last year, their company developed a hydraulic power unit, and the accuracy of the hydraulic pressure reducing valve used is very high. Their original manufacturer of the hydraulic pressure reducing valves reviewed but advised immediately that he was not able to meet the requirements. Grayson later found a new manufacturer of hydraulic pressure reducing valves, and the sample approval process was very smooth. Unexpectedly, customers complained about the instability of the hydraulic system less than 3 months after the equipment was sold. After inspection, it was found that the hydraulic pressure reducing valve was stuck. The manufacturer of the hydraulic pressure reducing valves said that the hydraulic oil deteriorated, and the viscous substances produced increased the resistance of the relative movement between the valve body and the valve spool, causing the hydraulic pressure reducing valve to be stuck, but their Engineer detected that the hydraulic oil was normal. The hydraulic pressure reducing valve manufacturers did not cooperate, and Grayson had to find other new manufacturers to replace those bad hydraulic pressure reducing valves. Grayson contacted a number of hydraulic valve manufacturers, but there was no reply. He was in a bad mood.

Grayson accidentally found AAK hydraulic valve in Google. He left a message on AAK website and asked, what are the reasons for the stuck of the hydraulic pressure reducing valves? I'm sure he's in trouble. After communication, I learned that he was cheated by the new manufacturer of hydraulic pressure reducing valves. The valve hole of hydraulic pressure reducing valves is not only the key quality point in processing and manufacturing, but also the processing difficulty. It can fundamentally affect the working performance, service life and stability of hydraulic pressure reducing valves. The hydraulic pressure reducing valve is stuck because of the coaxiality error of the valve hole during processing, resulting in the pressure imbalance in the matching gap between the valve hole and the valve spool, and caused the stuck problem. The valve hole accuracy of Grayson's hydraulic pressure reducing valve is required to be IT7 ~ 4. Most hydraulic pressure reducing valve manufacturers can't do it, but AAK is willing to challenge the high-precision hydraulic pressure reducing valves. Grayson saw the hope and asked AAK to send 10 hydraulic pressure reducing valve samples as soon as possible. After 30 days, 10 hydraulic pressure reducing valve samples were sent smoothly.

After the samples were sent out, there was no comments from Grayson about AAK hydraulic pressure reducing valves. Nearly half a year later, Grayson sent the reorder of 120 hydraulic pressure reducing valves, which proved that the previous 10 samples of AAK were up to standard.

AAK has a MICROSTAR FSH high-precision machine tool imported from Germany. The machining of the hydraulic pressure reducing valve hole can be completed (expansion - boring - boring - reaming - honing) with only one clamping. The final honing process adopts ultrasonic vibration honing. Compared with ordinary honing technology, it has the advantages of small cutting force, low cutting temperature, high cutting precision, long tool life and easy treatment of chips. The dimensional accuracy of the valve hole is IT7 ~ 4.

AAK hydraulic pressure reducing valves have high precision and durability. You can also have a small try!

Marten is an old customer from a Dutch hydraulic company. He is very cautious in the business of hydraulic valves and never changes hydraulic valve suppliers easily. AAK hydraulic valve reached the first cooperation of hydraulic relief valves under the introduction of his friend. It has been 3 years, and he orders 2 types of hydraulic relief valves with AAK every year. We have a very good personal relationship, and often communicate about some hydraulic valve technology.

Last month, Marten had an order for a special hydraulic relief valve that requires a surface roughness Ra of 0.1~0.2μm, which is more than 4 times accurate than the normal standard. All the hydraulic relief valves of this series are purchased from the hydraulic valve manufacturer that he has cooperated with for 5 years. This manufacturer has tried this hydraulic relief valve for 3 consecutive times, but the Ra value is still not up to standard. Marten thinks of AAK hydraulic valve. In the email, he has been emphasized that the surface roughness Ra value of hydraulic relief valve must reach 0.1~0.2μm. According to the hydraulic relief valve drawings sent by Marten, after discussion, AAK engineers expressed 90% certainty that the Ra value could reach 0.1~0.2μm. Marten seems to see hope, but also fear. He asked AAK TO try samples immediately. At the same time, the original hydraulic relief valve manufacturer was also requested to continue the sampling.

AAK arranged the most experienced technicians to operate the knife, first of all in the rough turning stage, cutting depth adjustment to 0.8~1.5mm, feed to 0.2~0.3mm/r, cutting speed to 30~50m/min and so on, after the rough turning Ra value is 12.5~6.3μm, while leaving 0.5~1mm as fine turning margin; Secondly, in the finishing stage, the cutting depth is adjusted to 0.1-0.3mm and the small feed is 0.05-0.2mm /r. At the same time, the cutting speed is ensured to reach the moderate value and the roughness Ra value is ensured to reach 0.2-0.16μm. AAK sent the hydraulic relief valve samples 10 days later.

On the 3rd day after receiving the samples of AAK hydraulic relief valve, Marten informed us by email that the Ra value of the surface roughness was up to standard. At the same time, he also informed that the original hydraulic relief valve manufacturer also continued the sampling, but failed in 5 samples for 5 times, while AAK succeeded in one time. He asked us to catch time to prepare material, he would discuss the PO of hydraulic relief valve with AAK after he confirmed the order quantity and the delivery date with his customer.

For high precision hydraulic relief valve roughness Ra value, in addition to use high precision lathes, good technicians are the key, to be good at adjusting lathe parameters according to different processing, for this hydraulic relief valve, AAK technician advantages are reflected in:

1. High speed and small cutting depth and feed are selected to reduce the residual area and Ra value. When finishing, select high-speed and small cutting depth and feed rate to reduce the residual area and reduce the Ra value.

2. Grinding the front and rear tool surfaces of the turning tool with engine oil, can effectively reduce the Ra value of the workpiece surface.

3. The 32 year old mechanic operating the machine tool, who can know whether the Ra value of the hydraulic relief valve is normal or not by just listening to the processing sound.

The Ra value of AAK hydraulic relief valve is 4 times that of the conventional standard and 2 times that of its peers. You can also have a small try.

An American IP left a message on our website: I saw your article "I regard quality as the highest principle of hydraulic valve manufacturing, why?". I want to know how AAK defines the quality of hydraulic valves. I specially checked the IP, which is an engineer from an engineering company listed in the United States.

I thought for half an hour. To define a category, it must be comprehensive. What are the total quality of hydraulic valves? How much do we understand the quality of hydraulic valves? First, don't check the encyclopedia, Google, or hydraulic valve academic, but focus on hydraulic valve common sense. In common sense, how do you understand the quality of hydraulic valves, because our users also understand the quality with common sense.

Friends who have read science and engineering know that there is a very famous management in Japan called total quality management. Of course, PDCA was invented by American Deming. What is carried forward is in Japan. The well-known Japanese enterprises implement total quality management. Almost all those engaged in manufacturing industry know total quality management, but few mention total quality. Some people say that total quality management has talked about total quality? Wrong, total quality management does not talk about total quality, only about management.

For the total quality of AAK hydraulic valves, I have defined 4 kinds of quality. The 1st is the manufacturing quality of hydraulic valves, the 2nd is the service quality of AAK, the 3rd is the functional quality of hydraulic valves, and the 4th is the performance quality of hydraulic valves.

The manufacturing quality of AAK hydraulic valves is now benchmarked with the international first-line brand, and the future is to surpass the international first-line brand. Especially in a subdivision field, such as high-pressure hydraulic valves, we should achieve top 1%.

1. AAK has been hydraulic valve ODM manufacturer for 3 of the world's top 500 for 10 years. The quality control process is strict and self-implementation is more strict than ISO certification system.

2. AAK has high-precision machine tools imported from Switzerland, Mikron GF high-precision CNC machining center and GILDEMEISTER turn milling compound machining center.

3. AAK has a full-time material engineer to check the selection of materials, which is responsible for screening, comparison, testing new materials connected with the Research Institute. AAK technical team has engineers from the world's top 500 hydraulic valve enterprises. They have their own experience in production drawing design, programming and production line quality control.

Service quality of AAK:

1. AAK provides 24-hour responses, 48-hour solution plans and 72-hour problem solved before, during and after sales. Our peers dare to think but dare not to do it.

2. Six international first-line brand enterprises imported from AAK, because of feel at ease, all the hydraulic valves with low MOQ, high precision and urgent delivery, were purchased from AAK, due to AAK’s mindfulness.

3. 3-year warranty. Most of our peers dare not think about it, let alone do it.

AAK hydraulic valve function quality and AAK hydraulic valve performance quality.

First, let's find out what the function is and what the performance is? For example, 8 years ago, our mobile phones could not take pictures, but now smart phones can take pictures. Taking pictures on mobile phones is a function; The quality of pictures is a kind of performance. AAK hydraulic valve is differentiated and different by function and performance, especially in the field of high-pressure and high-precision subdivision, absolutely different.

AAK hydraulic valve function quality:

1. The complete function of hydraulic valves is the least worth mentioning guarantee of AAK.

2. Each batch of materials shall be subject to heat treatment and never cut corners. Each hydraulic valve shall pass through the hydraulic table, with test reports and video records. Each hydraulic valve shall be tested 3 times and the test results shall be archived.

3. 3 design patents, 4 proprietary production and processing technology, and the technicians in the core posts have been experienced for more than 8 years. Their proficiency is like a ruler. The old mechanic who has been in the factory for more than 10 years can sometimes judge the production status by just listening to the sound of the machine, and each production link of the hydraulic valves is engraved in his mind.

Performance quality of AAK hydraulic valve:

1. The hydraulic valve with 3-year warranty has no vibration, no noise and high pressure resistance.

2. The machining surface accuracy of hydraulic valves is improved to within 0.3μm, the internal leakage can be less than 2drops / min.

3. Hydraulic valves with pressure resistance above 450bar and service life exceeding 2 million times, AAK hydraulic valve, Any valve, Any one, Any time, Any Where, just safety.

Maybe I read too few books. I can tell you that almost no master, marketing master or management master has said the subject of total quality. At least, the concept of "total quality" has not been put forward in the hydraulic valve industry. I said a little more narrowly. For the definition of hydraulic valve quality, AAK is the first person to define the hydraulic valve quality with 4 aspects of total quality.

AAK hydraulic valves, Any valve, Any One, Any time, Any Where, just Safety!

Someone asked me, you are not a mechanical professional. How can you guide AAK engineers to solve some difficult and complicated problems of hydraulic valves? Now the hydraulic valve industry has entered the stage of vertical specialization. Unprofessional may be a problem.

Although specialization is the standard way to professional knowledge, it may not be a good thing from the perspective of creativity. Because sometimes professional knowledge is a double-edged sword. If you are too professional in hydraulic valves and have too much professional knowledge of hydraulic valves, you may not notice those distant associations. I have always insisted that the solution to the problem is to cast a big net first.

Sitting next to the computer at 4:30 in the morning, I have 3 hours of association and quiet time. This is the darkness that does not belong to anyone. People usually wake up at 7:30, I have enough calm and patience to associate with the hydraulic valves and daydream at will.

To do something creative, many people say that we should jump out of the box and think, but I think we should do the opposite and learn to think in the box. I often advise my engineers not to create the function of hydraulic valves by imagination, but to innovate on a certain basis of hydraulic valves. Ten years ago, we bought some representative hydraulic valve standard parts and some novel non-standard hydraulic valves from the top 10 hydraulic valve manufacturers in the world from the United States and Europe, comprehensively dissected these big brand hydraulic valves, refined the selling points of technical parameters, and then innovated on these basis. Only then did we have 3 domestic patents and processes and 4 proprietary technologies of AAK hydraulic valves, and AAK hydraulic valves were exported to more than 20 countries, 6 international first-line brand customers have placed orders for 5 consecutive years, and re-buy rate of AAK hydraulic valves from old customers is no less than 62% every year.

What you think is right and what you can accept is basically wrong. What you think is wrong and what you can't accept are basically right. I read about 30 pages of books that are not related to the hydraulic valves every day. In the process of reading, I set aside a little time for daydreaming. For example, an idea in the book aroused my curiosity. I need to pause to connect my brain with this curiosity. Sometimes my brain will unconsciously link to the hydraulic valves.

Every coin has two sides, depending on the angle we look at. For a half a glass of water, what some people see is: Alas, there's only half a glass of water left; What some people see is: Wow, still have half a glass of water. Pessimists are often right. I admire the pessimists' comments on the real world. Really, they are right, but most of them are losers. Simple minded optimists may not succeed, but they often live a good life.

When I encountered the problem of hydraulic valves and couldn't find the answer after thinking hard, I found that sitting at my desk was almost a waste of time. Write out the hydraulic valve problem and knock it in the computer document, preferably on paper. Many people don't write it out, but trap the problem in their brain, which may not awaken their subconscious mind. Then, I will stay away from this hydraulic valve problem. Sometimes, when taking a bath or walking, the rudiment of the answer may come to mind. It's so wonderful. Turn off the music, stay away from the mobile phone, stay away from distractions, and let the brain unconsciously look for associations between different ideas. There may be surprises.

Insist on getting up early, reading and exercising, because if you can't persevere, you won't get anything. Those who have not been engaged in the production of hydraulic valves for more than 10 years can hardly have a comprehensive understanding of hydraulic valves. Both enterprises and individuals should stick to their commitments to others, especially to themselves.

I have no confidence in anything readily available, improvised and fast, but I believe in the power of stability, peace and long-term flow. Still water runs long. Any hydraulic valve manufacturer should be practical. I never believe that hydraulic valve manufacturers who lack self-discipline and self-growth will have a beautiful future. For example, in life, talented people are easy to bring traffic, but can't bring trust. The builder of self-discipline may not surprise people in a short time, but will gain long-term respect. This may be the cornerstone of trust.

AAK hydraulic valves, no trickery, only daily self-discipline construction.

We have an old hydraulic valve customer in South America. He has only two hydraulic valve suppliers in Ningbo, one is AAK hydraulic valve and another one is some hydraulic valve manufacturer. According to his description, AAK accounts for 70% of his purchase of hydraulic valves in Ningbo. In fact, I am very satisfied with this share and will not strive for 80% or 100%. Let him always use AAK hydraulic valves to compare with other hydraulic valve manufacturers, and feel the advantages of AAK hydraulic valves at all times.

Recently, He had a brainwave and wanted to purchase all hydraulic valves in one factory. In his email, he asked AAK to give some feedback on the quality positioning, industry reputation and price performance of another hydraulic valve manufacturer. To be honest, this request is very difficult for us, because as a mature hydraulic valve manufacturer, I am unwilling to answer such questions.

Before answering this question, what is the sign of personal maturity? There is a good word called "suspended judgment". To put it bluntly, we are not in a hurry to stand in line. Let's see, hang up the judgment we should have first and don't let the boots fall to the ground. When a man is mature and faces any situation, he takes many factors into account. There is no simple right and wrong in his world.

In today's digital age, we always try to turn people's vague attitude into a clear number. You have to give “likes” and “dislikes”, either fans or passers-by. In this context, most people's personality maturity slows down and is digitally trained to be eager to make a statement. Under the digitization, for those who are not easy to express their position, such people are out of the control of digitization. Such people are not only mature, but also have more advantages.

AAK hydraulic valve only sticks to its own research and development, technical transformation, quality control and service, and never pays attention to the trend of local hydraulic valve peers. I don't know his quality, reputation and price. In fact, I don't want to know. Because I never pay attention to the hydraulic valve counterparts, and only focus on the international first-line hydraulic valve brands. AAK hydraulic valve, never commenting on its peers, only targets the international first-line hydraulic valve brands, and gradually surpasses those international brands. In particular, AAK quality is rooted in the top 1% of the subdivided field of hydraulic valves.

AAK hydraulic valve, only go the right way, never afraid to go long way.

Early March this year, Austin from Canada left a message on AAK website: AAK hydraulic valves have been used in aviation field, can you produce hydraulic relief valves with the valve body produced by nickel titanium alloy? For similar messages, I basically reply that if there is a need, I will directly sampling the hydraulic relief valves. Whether it can meet the standard is not determined by mouth, but by data. After communication, it was learned that their company has a power unit used in the aviation hydraulic system, and the customer requires that the test run be completed within 3 months. Austin contacted an old supplier of hydraulic relief valves with the best quality, and the supplier promised to deliver 20 samples of high-precision hydraulic relief valves within 40 days. After 20 days, the manufacturer of the hydraulic relief valves can't bear it. In particular, the valve body of the hydraulic relief valves is made of nickel titanium alloy. During processing, the cutting tools were changed for 5 times, and 80% of the products were still scrapped.

Austin had to find a new manufacturer of hydraulic relief valves. He contacted some new manufacturers in a few days, they either have no confidence in the hydraulic relief valves used in the aviation field, or no reply at all. Austin saw in Google that AAK hydraulic valve supplied to military enterprises and aerospace equipment, and realized that maybe AAK can help solve the dilemma of hydraulic relief valves. According to the hydraulic relief valve drawings and working condition requirements emailed by Justin, AAK engineers found that this hydraulic relief valve is just similar to the one supplied to Russian customer last year. The difference is the valve hole size. It only needs to make small modifications to the process procedure, and 20 hydraulic relief valve samples are sent out after 15 days.

Two months later, Austin informed by email that the commissioning of the equipment was very smooth with the use of AAK hydraulic relief valves. AAK was the only one of more than 10 hydraulic relief valve manufacturers he contacted, who dared to make samples directly and completed the non-standard hydraulic relief valves in 2 weeks. Their engineers were surprised to have such a magical hydraulic relief valve manufacturer.

The non-standard hydraulic valves were completed in 2 weeks, which most hydraulic valve manufacturers can't do unless there are similar procedures. AAK has a number of non-standard hydraulic valve procedures. The key reason why AAK hydraulic relief valves can be supplied to military enterprises and aerospace fields is the following 3 points. There may not be a second hydraulic relief valve manufacturer in Ningbo that can meet the 3 points at the same time.

1. AAK technical team has engineers from the world's top 500 hydraulic valve enterprises. They have their own experience in material selection, production drawing design, oil circuit design and production quality control.

2. AAK has a high-precision CNC machining center imported from Switzerland and Kennametal combined tool imported from the United States. This tool has the best cutting ability for NiTi alloy with very high toughness and strength, and has high advantages in life, performance, efficiency and stability.

3. AAK test equipment has 5 pressure test benches that can operate independently of each other, and each test area is equipped with professional inspectors, so as to ensure that each hydraulic relief valve is qualified before shipment.

AAK high precision hydraulic relief valves can be used in aviation hydraulic system. You can also have a small try!

Last week Grossman placed an order for 1,500 hydraulic cartridge valves at one time. I'm not surprised at all. At the Shanghai PTC exhibition the year before last, I met Grossman from a Russian company and talked for more than 30 minutes at the exhibition. After the exhibition, Grossman informed by email that a newly developed hydraulic equipment of their company needs hydraulic cartridge valves, and 20 hydraulic cartridge valves from AAK were tested. This is a non-standard customized hydraulic cartridge valve. After we delivered the goods, Grossman didn't send any email to feed back the situation of AAK goods for half a year. A year later, Grossman placed the reorder of 200 hydraulic cartridge valves of the same model, and there was also no news after delivery. In 2 years, there were only two small orders of hydraulic cartridge valves, but I have a feeling that Grossman is further deeply testing AAK hydraulic cartridge valves.

It was not until last week when there was a large order for hydraulic cartridge valves placed, Grossman then started to describe the ups and downs of purchasing hydraulic cartridge valves in Ningbo. In the past 2 years, Grossman found more than 20 hydraulic cartridge valve manufacturers for sample testing and was cheated by some new hydraulic cartridge valve manufacturers. The quality of the test order was OK, but the reorder was complained by customer. For hydraulic cartridge valves purchased from some other factories, there were always complaints after a period of time, such as several leaks or jamming, insensitive opening and closing or serious wear etc.

The 2 batches of hydraulic cartridge valves from AAK have not received any complaint in 2 years, which is why he decided to order large quantities of hydraulic cartridge valves from AAK. After 2 years of comparison among more than 20 hydraulic valve manufacturers, Grossman found that only AAK hydraulic cartridge valves are 100% qualified. His boss also agreed that the future hydraulic cartridge valves will only be purchased from AAK.

No customer complaints with AAK hydraulic cartridge valves, that is because AAK has 3 advantages. There may be no second manufacturer in Ningbo who can have the following 3 points at the same time.

1. AAK hydraulic valve has high-precision CNC machining centers, machine tools and other equipment imported from Switzerland, as well as various independent fixtures upgraded and refitted by himself, which eliminates human errors. At the same time, the management of every detail of the processing, production, assembly, inspection and packaging of each hydraulic cartridge valve has been accurately controlled.

2. AAK uses pneumatic measuring instrument to test the accuracy of each processed valve sleeve, while most manufacturers use sampling test. During the assembly of accessories, the accuracy of the fit clearance between each valve spool and valve sleeve is tested again with a pneumatic measuring instrument.

3. After assembly, carefully check whether the accessories are complete, and test each hydraulic cartridge valve, including leakage, flexibility, opening and closing performance etc.

AAK hydraulic cartridge valves have conquered Russian customer with 3 facts leading domestic peers. You can also try one order.

At the beginning of March this year, Bartolomeo said in an email that he would like to make an appointment to consult AAK about hydraulic manifold problems. Bartolomeo, from Italy, is the purchasing manager of Italpresse Industrie Shanghai Branch. According to the communication, their company developed a hydraulic die-casting machine at the end of last year. The sales volume is just so. The general feedback is that the equipment has high energy consumption and low production efficiency. Their engineers pondered for more than 2 months, but couldn't find the reason, and the boss also had a big headache. Bartolomeo felt that the hydraulic manifold design dragged down the equipment and consulted the original hydraulic manifold manufacturer. However, the manufacturer could not put forward constructive opinions on the hydraulic manifold design.

Bartolomeo thought of AAK, because AAK had proposed to modify the oil circuit when receiving the inquiry about the hydraulic manifold. According to the design drawings and system schematic diagram of hydraulic manifold provided by Bartolomeo, AAK engineers closed the door and discussed for 3 days, basically found out the direction, and it is 90% determined that there was a deviation in the oil circuit design of the original hydraulic manifold on the hydraulic die casting machine. There is an energy conflict between the original hydraulic manifold oil circuit aperture and the hydraulic valve used, resulting in the slow response of the hydraulic system and the need for additional energy to maintain the operation of the system, resulting in high energy consumption and low production efficiency. AAK can redesign the hydraulic manifold oil circuit and send hydraulic manifold samples within 30 days. Bartolomeo was very happy that AAK found the cause of hydraulic manifold problem at once. The situation was fed back to the boss, who immediately paid for AAK to redesign and test samples.

A month later, AAK sent out the whole newly designed hydraulic manifold. Two weeks later, Bartolomeo emailed to order 20 hydraulic manifolds first to replace those ones on the equipment complained by customers. I was surprised that there was no comment on AAK hydraulic manifold samples but received the urgent order first. Bartolomeo advised that according to the comparison of their engineer’s on-site test run, the die casting machine with AAK hydraulic manifold has a sensitive response, the working efficiency is 11% higher than before, what’s more, the energy consumption is reduced by 30%. Their boss asked to order some hydraulic manifolds for emergency use first, and then replace all hydraulic manifolds on the original equipment with AAK shipments.

AAK has professional engineers with more than 20 years of industry experience from German HAWE company, they have unique experience in hydraulic manifold design, especially in oil circuit design. Combined with the system principle, through the change of the installation form and working area of the hydraulic valves and the innovative and optimized design of the oil circuit of the valve block, and the development and application of new materials, we can produce high-efficiency, energy-saving and durable hydraulic manifolds. You may not find a second such hydraulic manifold manufacturer in Ningbo.

The day before yesterday, Bartolomeo advised that the customer was very satisfied with the die casting machine replaced with new hydraulic manifolds and was ready to re purchase the equipment. The boss was very satisfied that he spontaneously sought the hydraulic manifold manufacturer to solve the old problems. The boss was going to promote him to take full charge of the work of the Shanghai Branch.

AAK hydraulic manifolds make your equipment efficient and energy-saving. You can also give it a try!

Hunter is an old purchaser of EAGLE PRO company in Canada. It has been several years since he purchased hydraulic directional control valves from AAK. In the second half of last year, Hunter emailed that he would become the general manager of Hangzhou branch in a month and visit AAK. Hunter has been engaged in procurement for 5 or 6 years. This promotion must be due to outstanding contributions. Some time ago, their company developed a batch of hydraulic cylinders, which vibrated greatly during commissioning. Their engineer thought that there was a problem with the hydraulic directional control valve, but the hydraulic directional control valve was normal when tested separately. The engineer was confused, and the boss was also very anxious. He asked hunter to consult the manufacturer of hydraulic directional control valves.

This hydraulic directional control valve is produced by a local factory in Canada. After on-site analysis, the engineer of the original factory thinks that the vibration is caused by the sharp change of oil port pressure during the reversing of the hydraulic directional control valve. It can be solved by changing the hydraulic manifold design. The engineer's scheme is to connect two small adjustable one-way throttle valves in series on the control oil circuit at both ends of the hydraulic direction control valve. After 20 days, according to the plan of the original hydraulic directional control valve manufacturer, there was no vibration. The boss was very happy and let Hunter be promoted. Knowing that the installation of two throttle valves has increased their cost by 20%, I wonder if there is any other scheme. After getting their hydraulic direction control valve drawings, hydraulic manifold drawings and the hydraulic schematic diagram of the system, AAK engineers began to analyze.

Three days later, AAK's scheme came out. The shoulder of the hydraulic directional control valve spool table was redesigned and a triangular throttling groove was added to avoid the sharp change of oil port pressure during reversing. This new design does not change the production cost of the hydraulic directional control valve, that is, it solves the vibration at zero cost. Hunter was a little incredible and asked AAK to immediately sample the new hydraulic direction control valve. One month later, the hydraulic directional control valve of AAK sample was sent out. After commissioning, there is no vibration, but the cost is zero. Hunter's boss happily saved 20% of the cost and asked hunter to always send inquiry for any hydraulic directional control valves to AAK at the first time.

The design of hydraulic directional control valve runs through the whole process of design, manufacturing, use and maintenance. A good hydraulic directional control valve design cannot be separated from manufacturing. AAK engineers consider not only manufacturing, but also the function and performance of the hydraulic directional control valves, even innovation. The innovation of this hydraulic directional control valve adds a new element of triangular throttling groove on the original basis.

Hunter privately informed that the boss was very satisfied that he solved the problem with 0 cost. He deserved the position of general manager of Hangzhou branch, and he worked harder and harder.

AAK hydraulic directional control valve, advanced to solve problems with 0 cost, you can also have a small try!

China's domestic large aircraft C919 is put into market at unit price of 99 million US dollars. Most of the performance indicators of C919 are the same as those of Airbus A320 and Boeing 737. In the future of China's manufacturing industry, labor-intensive factories will be eliminated. Instead, they will focus on manufacturers with certain technical content to benchmark or gradually surpass international first-line brands. This is also the trend for Chinese hydraulic valve manufacturers.

China has numerous small factories with its own proprietary technology, such as Chinese hydraulic valve manufacturers with its own unique technology. India, Vietnam and other Southeast Asian countries are unlikely to replace Chinese hydraulic valve manufacturers within 30 years. Therefore, I am optimistic about the future of Chinese hydraulic valve manufacturers, especially those with their own proprietary technology.

The more high-tech, the easier it is to be eliminated. Because there is Moore's Law in the high-tech field, it will be upgraded in 18 months. However, Chinese hydraulic valve manufacturers with their own proprietary technology do not have the curse of Moore's Law, so their vitality is extremely strong and can not be easily surpassed. For example, Chinese hydraulic valve manufacturers such as AAK, it is difficult for their peers to copy and imitate, and even some international first-line brands cannot do so. AAK hydraulic valves have surpassed most Chinese hydraulic valve manufacturers in terms of function, performance or quality.

1. AAK hydraulic valve pays attention to R & D and spends money on equipment, have high precision machine tools imported from Switzerland, Mikron GF high precision CNC machining center, GILDEMEISTER turning and milling compound machining center, and various independent fixtures upgraded and refitted by ourselves.

2. AAK technical team has engineers from the global top 10 of hydraulic valve industry, who have their own experience in material selection, production drawing design and production line quality control.

3. AAK has been ODM factory of 3 Fortune Global 500 companies for 10 years, and its quality control process is strict, which is more strict than the ISO certification system. As well as never relaxing the requirements for ourselves, we are constantly improving our technology by sticking to the details.

Don't say what Chinese hydraulic valve manufacturers don't have, or how impossible, people can't think about things they don't know. These are the wisdom of laymen's ignorance, and the more ignorant, the wiser.

AAK Hydraulic valves:

1. The core technology, especially the production of core components, the assembly and final commissioning of hydraulic valves, is in our own hands. We never make small moves under the table.

2. The network marketing, grasps in own hand, every day outputs the difficult and miscellaneous problems of the hydraulic valves, solves the problem for the customers.

3. Free choice, positioning the quality of hydraulic valves, and positioning the customers of hydraulic valves at the same time, free choice of customers to cooperate with.

AAK hydraulic valve only aims to be the leader of Chinese hydraulic valve manufacturers, and benchmarking the international first-line brands.

Generally, "big factories", such as Alibaba and Google, have a special department called Research Institute. AAK hydraulic valve also has a similar department, but it is called bench department. This department has no short-term KPI and no KPI catch-up. Like an engineer's paradise, AAK hydraulic valve engineers dare to keep trying and optimizing with such an environment.

In AAK hydraulic valve, the sales department makes today's money, the production department makes tomorrow's money, and the bench department makes the day after tomorrow's money. Conversely, the bench department is wasting today's money, spending tomorrow's money to do development for the sake of AAK hydraulic valve strategy and the future of AAK hydraulic valve, although the future is not clear, in my mind, they are the "special team" of AAK hydraulic valve.

Making high-quality hydraulic valves can only be driven by technology. A combat team composed of several people can anchor and conquer a technical direction. The subdivided STG (Special Technology Group) focuses on innovative solutions for hydraulic valves. There has never been a shortcut or a fast track for the scientific research of hydraulic valves. Only when we settle down to do things, can we make every step steady. The reason why science and technology in this world can be developed is precisely because of the engineers' persistence, which is a long-termism and a bench spirit.

AAK hydraulic valve is used in aircraft. It sounds very powerful. But it's really hard to do. Sometimes you can't see the way. Sometimes, there are many roads in front of you. Fortunately, AAK hydraulic valve chose the right path. Even if the road is tortuous, even if the road is very hard. But the right way is never far away. The bench Department of AAK hydraulic valve has to make a hard hit on this road every day. Diligence is a way to explore talents and a necessary condition for success.

AAK engineers have experienced for many years. It is not difficult to combine, mutate and graft some hydraulic valve structures to create some new hydraulic valves. Instead of making some so-called patents that can't create any value for no reason, it's better to use your limited life to do something that can leave a mark on this beautiful planet. At that time, when I am old to die, on my deathbed, I will think that I have lived for so many years and made so many devices to run on the earth, which is enough to make me smile in the underworld.

Bless the engineers of AAK hydraulic valve. May you have the bench spirit to conquer one mountain after another. I also wish AAK hydraulic valve a happy journey.

AAK hydraulic valves, the right way, never afraid of far.

Alexandro is from a logistics equipment company in Brazil. At the end of last year, they developed an airport logistics equipment, which will be promoted at this year's exhibition. Unstable pressure supply and slow response occurred in the commissioning stage, because the inlet and outlet oil flow of hydraulic manifold is unstable. Test each hydraulic valve in the hydraulic manifold separately, and there is no abnormality. Their technical team did not have a solution, but only asked Alexandro to re purchase hydraulic manifold. Alexandro knew that blindly re purchasing hydraulic manifold was tantamount to changing the form but not the content.

After consulting the manufacturers of the original hydraulic valves and hydraulic valve blocks, they all said that they are unable to analyze the whole hydraulic manifold, but they can ensure that their products have no problems. Alexandro is also consulting other hydraulic manifold manufacturers. A week has passed and no reply has been received. The boss also blamed Alexandro for the poor hydraulic manifold in purchasing, and Alexandro was unable to say the suffering.

Alexandro accidentally browsed AAK in Google and left a message: why is the pressure supply of hydraulic manifold unstable? Such questions are not specific and difficult to answer. It is just like the question, what is the cause of a child's fever? A blood test is needed to determine whether it is a virus or a bacterial infection. According to the hydraulic manifold drawings and video of commissioning provided by Alexandro. AAK engineers judge that the problems lie in the design of hydraulic manifold and the selection of hydraulic valves. I replied to Alexandro that AAK can redesign the hydraulic manifold, but it takes 40 days and 6,000 US dollars of development cost. If it fails, the fee can be refunded.

The promotion time is coming, the boss is pressing, but he still can not find a new factory. Maybe Alexandro has to only believe in the hydraulic manifold of AAK. After 40 days, AAK sent the hydraulic manifolds. 1 month later, Alexandro informed that the hydraulic manifold newly designed by AAK had been used for 3 weeks, and the equipment was normal.

Hydraulic manifold design runs through the whole process of design, manufacturing, use and maintenance, especially affected by manufacturing, that is to say, a good hydraulic manifold design cannot be separated from manufacturing. AAK often receives some hydraulic manifold drawings that cannot be processed directly according to the drawings. A good hydraulic manifold designer must be able to analyze the whole manufacturing process. AAK hydraulic manifold engineers consider not only manufacturing, but also the use, because the design is for "use”, such as hydraulic manifold efficiency, energy consumption, stability, service life, and maintenance methods. Innovation is also needed in hydraulic manifold design. AAK hydraulic manifold innovation means that each hydraulic valve is re combined into a new hydraulic manifold, or some new elements are added to the old hydraulic manifold. New things are generated in affirmation and negation, and negation and affirmation. Innovation is just like seasoning. With such a little seasoning, the dish tastes more delicious.

AAK hydraulic manifold runs through the whole process of design, manufacturing, use and maintenance. You can also have a try!

Janice, from Canada, wants to purchase 600 hydraulic relief valves. The core difficulty of this hydraulic relief valve lies in the processing of valve elements. Most factories can only bemoan their inadequacy for the valve elements with inclined holes and included angles. The American hydraulic relief valve manufacturer who has been cooperating with Janice has failed 4 times in 30 days and had to surrender. Janice found more than 20 hydraulic relief valve manufacturers online and offline, at home and abroad, but they either replied that there was no time for sampling or no response. Janice has been tossing about for a week and is a little frustrated.

Pablo, an old customer of AAK, after learning about Janice's procurement problems, suggested that she send the hydraulic relief valve drawing to AAK for a try. Pablo also specially wrote me an email to ask AAK to help Janice. I am willing to try to solve such a difficult problem of hydraulic relief valve. Once it is solved, I have won the admiration of two people at the same time.

According to the hydraulic relief valve drawing sent by Janice, except for the valve core, other requirements are also conventional. The valve core of this hydraulic relief valve is different from the conventional straight hole valve core, which is marked in the drawing Φ4- Φ3.7mm inclined hole, and the axis line of the Φ3.7mm hole forms an included angle of 60 ° with the axis of the valve core parts. It is difficult and requires high precision in the clamping and positioning process of hole processing. The hydraulic relief valve manufacturers without high-precision equipment and over 15 years old technicians will fail even if they try to make samples for 100 times.

AAK technical team discussed for 2 days, and they were 70% confident that the sample would be successful. Although Janice is a little disappointed, it is also the best news she has received recently. She is in urgent need of this hydraulic relief valve. AAK has been brainstorming for 2 weeks, constantly changing the material of the hydraulic relief valve core, adjusting the process parameters, and sending the hydraulic relief valve sample for the first time. After 5 days, Janice informed that there was an error of 0.1% in the inclined hole of the hydraulic relief valve spool. AAK carried out the second hydraulic relief valve sample and optimized the process again on the high-precision turning milling composite locomotive to improve the accuracy of the inclined hole. A few days after AAK's second hydraulic relief valve sample was sent, Janice sent an e-mail. The American manufacturer spent 4 weeks on this hydraulic relief valve, but all 4 samples failed. She tossed and turned for a week and failed to find a hydraulic relief valve manufacturer that dared to make samples. However, AAK succeeded in 2 proofing within 2 - 3 weeks.

AAK high-precision turning milling compound machine tool is the core of the success of the sample. This machine tool is equipped with upper and lower tool towers. The main shaft can be 360 ° indexed. The upper shaft is the milling main shaft, with a rotation angle of 225° and 40 tools. At the same time, it can complete the machining of axial hole, radial hole, inclined hole drilling and reaming, inclined groove and tapping under one-time clamping. The key to the success of AAK sample is our old technician, who has 32 years of practical operation experience. With specially assigned person and special machine, AAK has unique skills in turning and milling compound machine tools.

AAK hydraulic relief valve, valve element with inclined hole and included angle can also be produced. You can also have a small try!

Samuel is from OLEODINAMICA REVA SRL company in Italy. He has purchased a non-standard hydraulic relief valve from AAK for 2 years, and re-peat the orders 3 – 4 times every year. He didn't expect that in order to save 20% of the cost, the hydraulic relief valves purchased from a new manufacturer was complained by customer for insufficient power within only half a year. This hydraulic relief valve is used in the top 3 hydraulic power unit they sell. There have been no complaints in the past 2 years. The root cause of insufficient power is that the main valve element of the hydraulic relief valve is stuck, causing the pressure oil output by the hydraulic pump to overflow back to the oil tank, affecting the power.

Samuel contacted the new manufacturer of the hydraulic pressure relief valves. The manufacturer replied that they can only guarantee the service life of more than half a year for 450bar high-pressure working condition and high-frequency use hydraulic relief valves. This hydraulic relief valve is benchmarked to German HAWE. Perhaps only HAWE high-pressure hydraulic relief valve has a service life of more than 2 years. The hydraulic relief valves produced by the new manufacturer have only half a year of service life, and Samuel felt helpless.

The boss can not understand why Samuel blindly changed the manufacturer without knowing the service life of the hydraulic relief valve. This hydraulic relief valve has been customized by AAK before. The equipment has been used for more than 2 years without customer complaints. Samuel had to contact AAK again and truthfully told us that in August last year, another manufacturer provided a quotation of 20% cheaper than AAK, so he moved the order of this hydraulic relief valve to the new manufacturer. Now, those hydraulic relief valves need to be replaced, he needed AAK’s help to produce 100 hydraulic relief valves quickly.

I immediately asked the workshop to produce 100 hydraulic relief valves at once. The workshop director said it was not worth adjusting the production line for such a customer with low loyalty. But it is the responsibility of AAK to solve problems for customers. At the same time, I am grateful to this new hydraulic relief valve manufacturer. I believe Samuel will never transfer orders from AAK again. After 3 weeks, 100 hydraulic relief valves were successfully shipped from AAK. Samuel emailed a few days ago that the power of the equipment was normal after AAK hydraulic relief valves were used.

AAK high-pressure hydraulic relief valve can be benchmarked with German HAWE due to 3 key points. It may be difficult to find such a second hydraulic valve manufacturer in Ningbo.

1. AAK hydraulic relief valve element material is ETG100 produced by STEELTEC in Switzerland, with high strength. It is suitable for high-speed CNC processing. After the valve element is processed and formed, the internal and external cross-sections have the same strength and can withstand high pressure above 450bar. Less than 1% of the manufacturers are using ETG100 to produce valve element.

2. AAK has a high-precision CNC machining center imported from Switzerland. AAK old technicians can control processing efficiently and without mistakes. This unique skill may only be in AAK.

3. AAK technical team has engineers who have worked in HAWE for many years and have unique experience in high pressure resistance.

AAK hydraulic relief valve, under 450bar high pressure, can be used for more than 2 years. You can also have a small try!

Maverick comes from a hydraulic equipment company in the United States. He has been very successful in the purchase of hydraulic valves, but fell over on the hydraulic check valves purchased last year. At the end of last year, the hydraulic system of a batch of excavators shipped to Vietnam was prone to heat, and the output power was insufficient and unstable. Users were very dissatisfied with such excavators. According to the working conditions of the excavators, the after-sales engineer judged that the hydraulic check valves were abnormal. After disassembling the hydraulic check valves, it was found that the tolerance of form and position of the valve spool and the valve hole is inconsistent, and it was also found that the valve spool was stuck, causing the excavator to be abnormal.

The engineer asked Maverick to replenish 50 hydraulic check valves to solve user complaints. Maverick contacted the original manufacturer of the hydraulic check valves, and the manufacturer agreed. A week later, the engineer replaced the abnormal hydraulic check valves, but 10 days later, another excavator had the same abnormality. At this time, Maverick realized the problem. No one could accept the long-term and high-frequency after-sales replacement, so he had to find a new hydraulic check valve manufacturer.

Maverick left a message on AAK website: can you ensure that each hydraulic check valve has no abnormal problem within the warranty period? I replied, "I'll let you know if it's OK. You can try it out.". The next day, Maverick placed a trial order for 50 hydraulic check valves and mentioned to avoid the hydraulic system heating. I told him that the hydraulic check valve used to control the oil return in the hydraulic system is connected with the hydraulic oil radiator and connected to the outlet of the oil return filter element. If the hydraulic check valve is stuck in the normally open position, the oil return radiator will not play the role of heat dissipation. As long as it is not stuck, the hydraulic system will not be easy to heat up.

6 months after the 50 hydraulic check valves were shipped, I received an email from Maverick today. After install the excavator with AAK hydraulic check valves, the excavator was still normal after 6 months. The customer was very satisfied with their after-sales service to completely solve the problem. I smiled and said that as long as there is no artificial mistake, even after another 6 months, these excavators equipped with AAK hydraulic check valves will not have complaints caused by hydraulic check valves.

For the hydraulic check valves, the consistency of the form and position tolerance between the valve spool and the valve hole is the key to directly determine whether the whole valve will be stuck. AAK hydraulic check valves can achieve 100% qualification. The most important reasons are as follows:

1. AAK has Germany Nagel precision honing machine. After honing, the dimensional accuracy of the valve spool and valve body of the hydraulic check valves is IT7 ~ 4, and the form and position tolerances are completely consistent, which is impossible for most manufacturers.

2. Check the accuracy of each hydraulic check valve spool and valve hole to ensure that the minimum axial grinding tolerance is 0.075μm. Thus, each hydraulic check valve can achieve 100% no jamming. Manufacturers with such precision control will not exceed 3 in Ningbo.

3. AAK technical team has engineers from the world's top 500 hydraulic valve enterprises, who have their own experience in material selection, production drawing design and production line quality control.

Maverick told me privately that his boss appreciated that he could find such a reliable hydraulic check valve manufacturer AAK this time, and the boss would give him a raise.

AAK hydraulic check valves, the form and position tolerance is consistent without jamming, you can also have a small try!

AAK hydraulic manifold design runs through the whole process of design, manufacturing, use, maintenance and innovation. With such a five-level thinking, there is no second such hydraulic manifold manufacturer in Ningbo. A good hydraulic manifold design cannot be separated from manufacturing. The more an excellent hydraulic manifold engineer knows about hydraulic manifold manufacturing, the more helpful it is to improve the design level. The design of hydraulic manifold is inseparable from experience. Of course, professional experience can be learned from books, but it is difficult to leave a deep impression in your mind if you do not output it. It is not easy to absorb the experience of others without a foundation.

AAK often receives some hydraulic manifold drawings that cannot be directly processed and assembled according to the drawings. It is common to find problems during drawing review and process. There are many reasons, such as the standardization of the drafter, the level of the reviewer, especially whether the designer has a deep understanding of the hydraulic manifold manufacturing process. AAK hydraulic manifold designer must be able to analyze the whole manufacturing process of a hydraulic manifold drawing designed by himself.

If a hydraulic manifold engineer only knows casting, forging, turning, tongs, milling, planing, grinding and drilling, that is not enough. He must subdivide them. For example, how to divide the mold during casting, how to place the gate and riser, and what kind of casting defects may occur; For another example, the cutting process should be able to be visualized in your mind. How many knives are used in total, what rotation speed, feed rate, should be selected etc., and even the shape and color of the chips, as well as the sequence of each process. It does not mean that those engaged in hydraulic manifold design must be able to play with lathes and milling machines. Instead, they should know the characteristics of these operations and take them into full consideration in the design. Such hydraulic manifold design can settle down. In AAK, these are not enough, because technicians with more than 10 years of service need to have more mature detailed plans. The only solution is to read more books, communicate with old technicians and stay in the production workshop.

The hydraulic manifold engineer should understand the interrelationship between the transmission and devices of the whole machine, and the interrelationship of each part. After understanding these, the drawing can be drawn, and the drawing can have clear dimensional matching requirements and geometric tolerance constraints. Instead of simply noting the machining accuracy on the drawing, but cannot be realized in production. If the designed hydraulic manifold can improve the added value of the equipment, optimize the function, improve the performance and improve the stability, so as to meet the high-end customers. The design made by a wordy person is a bit wordy, and the design made by a stingy person is a bit stingy. The hydraulic manifold made by an irresponsible person is just as irresponsible as that person's virtue.

What others have summed up is usually the result of painstaking efforts. If we learn from problems, we can absorb the experience of our predecessors by imitating and thinking more. AAK hydraulic manifold engineer will not say such a stupid answer as "just ensure the concentricity", but the method to ensure the concentricity, and even point out the mistakes of the predecessors. At this time, the problems considered by AAK hydraulic manifold engineers need to be raised to a higher level, because the design serves "use", such as hydraulic manifold efficiency, energy consumption, stability and service life.

If the hydraulic manifold design is not conducive to use, there will be complaints. The use is also inseparable from maintenance. The hydraulic manifold design cannot ignore the convenience of maintenance. Some large-scale hydraulic equipment is maintained only once or twice a year, and the equipment cannot be broken up every time. Otherwise, the eighteen kinds of weapons for the jack and crowbar of the travelling crane and forklift are not enough, the loss resulted from shutdown has exceeded the value of the hydraulic manifold itself.

Hydraulic manifold design should not only stand on the basis of manufacturing, but also have innovation, and must learn to inherit. The innovation of AAK hydraulic manifold means that each hydraulic valve is reassembled into a new hydraulic manifold, or some new elements are added to the old hydraulic manifolds. New things are all born from negation in affirmation, and affirmation in negation. Innovation is like seasoning. With such a little seasoning, the food tastes more delicious. If you can have your own design concept and style, it is different. In this way, the hydraulic manifold has a unique soul. A truly hydraulic manifold engineer needs at least 10 years, or even more than 15 years of hard work.

AAK hydraulic manifolds, engineers use design, manufacturing, use, maintenance and innovation to define the design of hydraulic manifolds. It may not be possible to find a second hydraulic manifold manufacturer with such a five-level thinking.

Someone left a message on AAK hydraulic valve website: I saw that some hydraulic valve peers were imitating AAK articles and some hydraulic valve manufacturers were imitating AAK new products. He also attached a link to me. AAK colleagues asked me how to deal with these hydraulic valve peers?

I think so, I do my hydraulic valves, I write my articles. AAK hydraulic valve has been introduced to the public online, and its peers want to follow the flow. Perhaps several inquiries and even several orders for AAK hydraulic valves were taken away by them. But I know one thing very well. They are all fake AAK hydraulic valves. Sooner or later, their hydraulic valves will have problems. This part of the orders robbed by peers may return to AAK hydraulic valve.

On the contrary, these peers are still creating public praise for AAK hydraulic valve, because AAK hydraulic valve is authentic and its quality is benchmarked to international first-class brands. Those peers who counterfeit AAK hydraulic valve are making negative teaching materials for AAK hydraulic valve. The peers imitated the article of AAK hydraulic valve and let them to copy it. If someone can copy my 100 articles, I should make friends with him. Why? He adores me. Why not make friends.

Many times, for the same thing, our mentality and cognition are different. For example, when you see half a bottle of water, there are two kinds of mentality. A said: Oh, there is only half a bottle of water. B said: Wow, there is still half a bottle of water. Hydraulic valve peers copy my articles, I prefer to write every day, I am such an optimistic attitude. All the people who imitate me and copy me are creating public praise and negative teaching materials for me. I am grateful to them. At the same time, the business of AAK hydraulic valve will be better and better.

Peers are imitating AAK hydraulic valves, but the sales volume of AAK has not come down, which means that the imitation of peers has no impact on AAK hydraulic valves. Why do I care about the imitation of peers and take time to pay attention to this? It's absolutely unnecessary. I don't suggest that everything should be absolutely right and the secondary disasters also need to be considered. For example, there is a fly outside the window of the office. Dozens of us work here. In order not to let this fly fly in, we don't open the window all year round. It's certainly wrong not to open windows all year round. But now many people have this mentality and have this understanding. They always look at the world with a negative and pessimistic attitude. The pessimist is always right. What he says is right, but the optimists in this world often make money.

My peers copied my articles to imitate AAK hydraulic valve, and even the product names. This is similar to a fly outside the window. In order to contain a rotten man, delaying or ruining the great hydraulic valve business, which puts the cart before the horse.

AAK hydraulic valve always adheres to the right path, because the right path is not afraid of being far.

On Monday morning, I received an email from Whitney to order 2,000 hydraulic relief valves at one time. I am glad that Whitney's first order for the hydraulic relief valves to AAK was a big one. Whitney was introduced to AAK by Friedlich of Polar company, our old customer. The hydraulic relief valve she inquired about was similar to the hydraulic relief valve purchased by Polar company last time. Both of them were non-standard hydraulic relief valves.

In October last year, Whitney's newly designed hydraulic equipment needed a hydraulic relief valve. According to the requirements of equipment working conditions, the durability of the hydraulic relief valve should reach more than 2 million times. Because the equipment time was very tight, the boss asked Whitney to get the samples of the hydraulic relief valve in place within 6 weeks. Whitney knows that for non-standard hydraulic relief valves, the quantity of trial order is small, the time is tight, and the requirements are high. Most manufacturers are not willing to do it, and they can't do it well. Sure enough, Whitney sent emails to more than 20 manufacturers of hydraulic relief valves back and forth. They either replied that there was no time or no reply at all. This wasted more than a week but even the manufacturer was not determined. Whitney was very worried.

Friedlich in Polar company is Whitney's college classmate. After learning that Whitney had difficulties in purchasing hydraulic relief valves, Friedlich asked her to contact AAK, because AAK supplied them with 3 batches of hydraulic relief valves with durability of more than 2 million times in 2021. I received an e-mail from Whitney requesting that samples of the hydraulic relief valves be sent within 4 weeks for them to debug the equipment.

2 weeks later, I sent her the parcel tracking number. She was surprised that the non-standard hydraulic relief valve was sampled in only 2 weeks. I replied directly that most manufacturers could not get non-standard hydraulic relief valve samples with high requirements within 4 weeks. The reason why AAK can send it out in 2 weeks is that your hydraulic relief valve is similar to the one customized by Polar last time. We only need to modify a few dimension data in the program.

A week later, Whitney informed that the new hydraulic equipment was successfully commissioned with AAK hydraulic relief valves. At present, the durability of the hydraulic relief valves is being tested. I am confident to say that there is no need for your engineers to test the durability. I guarantee that more than 2 million times. Polar has purchased 3 batches of hydraulic relief valves from AAK within 1 year, that is to say that it has long been a fact that the hydraulic relief valves with durability of more than 2million times.

She also wanted to know why AAK hydraulic relief valve was so durable. I told her that it took more than 2 months and 3 times for AAK to make samples for Friedlich before and finally selected 3Cr3Mo3W2V hot work die steel. This steel can withstand huge mechanical stress in work. It not only has high hardness, strength, wear resistance and toughness, but also has good high temperature strength, thermal fatigue stability, thermal conductivity and corrosion resistance. At the same time, its high hardenability ensures that the whole section has consistent mechanical properties, so as to ensure that the hydraulic relief valve will not be impacted and eroded during the working process of the system, and achieve durable performance.

AAK hydraulic relief valve, it is very common to be introduced to new customers by old customers. You can also have a small try!

Half a year ago, David, an American customer, sent an inquiry to AAK about 500 pilot operated hydraulic relief valves. This hydraulic relief valve is difficult to process the inner hole. Our cost accounting department gave a reasonable price. 3 days later, David informed AAK that the price of the hydraulic relief valve was 16% higher than that of other manufacturers and he could only place the order with other hydraulic relief valve manufacturer. As far as I know, there are not many manufacturers who can make this hydraulic relief valve. The price provided by AAK this time should be very cost-effective. As David is our old customer, we never quote prices indiscriminately. I always believe that it is also a sign of dishonesty to quote prices indiscriminately.

Last month, David asked again whether the hydraulic relief valve quoted last year could maintain its original price. I asked him curiously, hasn't this hydraulic relief valve placed an order yet? David truthfully told us that last time, the pilot operated hydraulic relief valves purchased in another manufacturer were reported by the users that the stability was poor and the valve was often stuck. They decided to get replacements. David contacted the original manufacturer of the hydraulic relief valves, but the manufacturer was unwilling to offer replacements. Because there were too many complaints, David did not dare to ask the original manufacturer to re produce, so he emailed AAK.

David was very cautious this time. He specially sent us 5 samples of hydraulic relief valves from the original manufacturer. After receiving and checking, we found that the inner hole of the hydraulic relief valve has a taper, the processing size is not accurate, and the surface roughness Ra is as high as 1.6μm. The root cause of these problems is that the processing tool rotates improperly, which also shows that the original manufacturer is not good at processing this special inner hole. No wonder there are so many complaints. It is wise for David to change the factory.

David was satisfied with our diagnosis of this hydraulic relief valve and asked us to make samples as soon as possible. 1 week later, AAK sent the samples of hydraulic relief valve, and David approved our samples at one time. They specially compared AAK hydraulic relief valves with that of the original manufacturer. Their engineers admired the inner hole processing of AAK, which not only has no taper, but also has more than twice the accuracy of the original manufacturer.

For the special inner hole of this pilot hydraulic relief valve, AAK adopts CBN cubic boron nitride cutter from Sumitomo company of Japan to replace the conventional ceramic cutter. Most hydraulic relief valve manufacturers dare not use this cutter, which is not only costly, but also exquisite in operation. After the program is set, the tool completely avoids the taper of the inner hole. At the same time, for the machining of inner holes, we also customized the CBN boring cutter of integral cemented carbide steel, which can ensure the roughness value Ra below 0.8μm. Our technicians deliberately adjusted the cutting parameters to: n=400r/min, f=0.08mm/r, which improved the production efficiency and dimensional stability. AAK has never been stingy with the cost to ensure the processing quality. For the inner hole processing with high quality, AAK only uses the latest and most efficient cutting tools in the industry.

AAK hydraulic relief valves most welcome customers with high quality. You are welcome to give it a try and be repaid with AAK unique skills.

Levi is from a Canadian hydraulic equipment manufacturing company. He has purchased hydraulic needle valves from AAK for several years. We often have some discussion about hydraulic valves. In the second half of last year, they wanted to launch a new high-frequency four column hydraulic press, but the test was not successful. The hydraulic oil temperature is too high, resulting in unstable equipment running speed. Their engineers checked each circuit and found no problems. No abnormality was found in each hydraulic component, including the hydraulic needle valve. Levi contacted the original hydraulic component suppliers and did not receive any positive suggestions. A week passed without any progress, and the boss was worried.

Levi thought of AAK. Although this batch of hydraulic needle valves was purchased from American manufacturer due to time constraint, some problems of the hydraulic needle valves in previous times were solved by AAK. AAK engineers found out the problem 1 day later according to the system schematic diagram, commissioning video and drawings of core hydraulic components provided by Levi. The probable reason is that the hydraulic needle valve has a problem. Levi doesn't believe it, because the hydraulic needle valves come from an American factory, they also tested the hydraulic needle valves separately, and there is no abnormality.

AAK can redesign the hydraulic needle valve and send samples within 3 weeks. If AAK hydraulic needle valve can not solve the running speed problem of the equipment, we will return the trial order fee. Levi thinks there is no risk. Maybe this is also hope. 3 weeks later, we sent out the trial order of 10 hydraulic needle valves. Their engineers replaced the original hydraulic needle valves, and the four column hydraulic press was continuously tested for 48h. Although the oil temperature was also high, the speed of equipment operation was stable and the equipment operated normally. Levi was surprised that AAK newly designed hydraulic needle valve was more awesome than their American manufacturer. Their engineers admired AAK for finding and solving problems.

Our customer in Belarus encountered similar problems last year, so our engineers quickly found the problem. The use frequency of this four column hydraulic press is twice as high as that of the normal one. The equipment works at high frequency for a short time, resulting in an increase in oil temperature and a decrease in oil viscosity. In this way, the flow of oil through the small hole of the hydraulic needle valve increases, which leads to a change in the originally set working speed and leads to the instability of the equipment. If the flow area of the orifice of the hydraulic needle valve is changed, the running speed of the equipment can be controlled by reducing the flow.

Many times, most of the problems encountered have been solved by someone, and the curative effect is good. We only need to find this person or these people. The most stupid behavior of a person is not willing to learn or use ready-made experience. AAK is willing to solve every problem of hydraulic valves and has accumulated a large number of cases.

Levi privately told me that the equipment running was smooth, the boss was in a good mood, and was confident that the equipment pre-sale would be hot, and the boss also looked him with new eyes.

AAK hydraulic needle valves, Levi said that it is more powerful than that of the American manufacturer. You can also give it a try!

Caspar is from Samhydraulik S.p.A. in Italy, mainly responsible for the purchasing of hydraulic valves. In March this year, Caspar requested AAK to sample 10 hydraulic pressure control valves by soonest. This sample order was quoted half a year ago. There must be a reason for him to be so anxious to place an order now. After several rounds of communication, it was learned that Caspar was cheated by the original hydraulic pressure control valve manufacturer.

In the second half of last year, their company developed a new hydraulic power unit, which requires a high-pressure hydraulic pressure control valve, and the durability should reach more than 2 million times. Caspar contacted more than 10 hydraulic pressure control valve manufacturers. Most of them are able to produce the hydraulic pressure control valves with high pressure resistance and durability of more than 2 million times. Only AAK hydraulic valve and other 2 manufacturers have quoted prices. After receiving our quotation, Caspar said that the price of AAK hydraulic pressure control valve was about 20% higher than that of other manufacturers, and then there was no further news. Until today, 6 months later, he was anxious to ask AAK to make samples immediately.

6 months ago, Caspar selected another hydraulic pressure control valve manufacturer to make samples. 5 weeks later, their new hydraulic power unit was successfully tested and the equipment was expected to be popular. Caspar asked the original hydraulic pressure control valve manufacturer to hurry up to prepare materials, but the manufacturer wanted to raise the price by 40%. Because the valve spool material was hard, the cutting tools needed to be changed constantly, the production cost was increased, and the defective rate was also high. If without a price increase, the manufacturer refuses to produce the order. Caspar felt very helpless.

The boss was very dissatisfied with such a hydraulic pressure control valve manufacturer who raised the price at the last moment, and asked Caspar to find a new manufacturer. Caspar suggested that AAK can make samples. If the original price of AAK hydraulic pressure control valve can be maintained, 20% of the cost will be saved. 1 month later, AAK sent 10 samples of hydraulic valve pressure control valves. 1 week later, Caspar informed that the test was passed and 1,000 samples need to be produced immediately. Caspar also wants to know why AAK hydraulic valve pressure control valve can maintain its original price in the same 6 months, while the other manufacturer needs to increase it by 40%.

Most manufacturers of hydraulic pressure control valves do not pay attention to some details in the processing at the drawing stage, and only know after suffering in the sampling process. This hydraulic pressure control valve has high requirements, especially the reaming of valve spool hole is the key to the finished product. AAK does not need to constantly change the tools, because the ingenious use of cutting fluid in the cutting process can reduce the friction between the tool and the workpiece surface, reduce the chip, and reduce the cutting force and cutting temperature. This is a unique skill. AAK engineers with more than 20 years of production experience strictly control the process, and select the best Castrol cutting fluid in the world. With its high permeability and high adsorption efficiency, combined with the control of our engineers, not only the cost is saved, but also the tool wear is effectively reduced, and the surface quality of the workpiece is also high.

AAK hydraulic pressure control valve is high-pressure resistant and durable for more than 2 million times. You can also have a small try!

Stephen is from Hi-Force hydraulic equipment manufacturing company in the UK. In the second half of last year, he was promoted to the purchasing manager of Kuala Lumpur Branch due to his excellent work. Within a week of taking office, he met with complaints. A batch of their hydraulic cylinders were noisy and vibrated seriously during operation. The after-sales engineer failed to solve the problem within 3 days. The user was not satisfied. Stephen was a little worried.

Stephen browsed an article of AAK on Google: "change the design of the hydraulic directional control valve, the vibration disappeared, and AAK eliminated the Canadian factory at zero cost", and left a message: how to solve the noise and vibration of the hydraulic cylinder? After reading this message, I roughly judged that either the hydraulic directional control valve used had problems or the original design had hidden dangers. We asked Stephen to provide the hydraulic system schematic diagram and design drawings, and AAK engineer judges that the working principle of the hydraulic cylinder is reasonable, only by checking on site can we find out the source of the vibration, and then no news from Stephen. 2 weeks later, Stephen emailed that according to the last case that AAK solved the vibration of the hydraulic cylinder, they also added a triangular throttling groove to the hydraulic direction control valve, but after installation, the hydraulic cylinder still vibrated. Their engineers said that AAK solution was a lie. I was speechless and didn't want to explain anything, so I ignored him.

3 days later, Stephen emailed us again, and sent a video of the hydraulic cylinder working and asked our help to check. AAK engineers found that the hydraulic cylinder will emit rhythmic noise and vibration whenever the load drops in the actual work, and preliminarily judged that there is a problem with the hydraulic direction control valve. AAK technical team discussed again according to the drawings, the working principle diagram of the hydraulic cylinder and the working video of the hydraulic cylinder, and confirmed that the problem lies in the hydraulic direction control valve. I told him that AAK could redesign the hydraulic directional control valve and asked him to send us samples of the original hydraulic directional control valve. Stephen may have no choice but promised.

5 days later, we received the sample of the original hydraulic directional control valve, which confirmed the judgment of our engineers that the internal leakage and external leakage of the original hydraulic directional control valve was reversed. 1 week later, AAK sent the newly designed external leakage type hydraulic directional control valve. Stephen informed by email that the noise and vibration problems of the hydraulic cylinder had been solved after using AAK external leakage hydraulic directional control valve. In the past 4 weeks, their engineers, from suspicion, disdain to admiration, wanted to know how AAK engineers found and solved problems, and sent out new hydraulic directional control valves in only 1 week.

When the load of the hydraulic cylinder moves downward, the pressure at the oil inlet of the hydraulic directional control valve is pushed higher due to the action of the needle valve. At this time, the control oil inlet is still the original set pressure. Under the action of the oil inlet pressure, the hydraulic directional control valve will be closed. When the oil inlet pressure drops, the hydraulic directional control valve will be opened again. The repetition of this process leads to the vibration and noise of the hydraulic cylinder. That is, the reason for the problem lies in the selection of hydraulic directional control valve. It is only necessary to change the internal leakage hydraulic directional control valve into the external leakage hydraulic directional control valve. Just a while ago, a Canadian customer also ordered the same type of external leakage hydraulic directional control valve, and we have existing samples, so they were sent out soon. Their engineers have to sigh that AAK has too many customer cases, which is true and can really solve the problem.

Stephen also privately informed us that his boss was very satisfied with his attitude and spirit to solve the problem this time, and his colleagues in Kuala Lumpur Branch admired him.

AAK hydraulic directional control valve, no noise, no vibration, you can also have a small try!

Jimmy is from a hydraulic equipment company in the United States. He has cooperated with AAK for more than 2 years and is very sticky about the quality of hydraulic relief valves. At the end of last year, the hydraulic pilot operated relief valve used in the hydraulic unit they developed could only be purchased from local manufacturer because of tight time. Problems were encountered in the hydraulic manifold installation. The existing hydraulic relief valve of the American factory occupied a little position of the motor, resulting in difficulties in the installation of the motor. If the position of the hydraulic relief valve is changed, the manifold oil circuit will be changed and the power supply of the hydraulic system will be affected. The manufacturer of the hydraulic pressure relief valve has no time to adjust the size. Jimmy had to look for other manufacturers of hydraulic pilot operated relief valves. After a week, he found more than 10 local manufacturers of hydraulic relief valves in the United States. Some of them were not willing to customize it due to small quantity, while some gave no reply at all. Jimmy was very helpless.

Jimmy thought of AAK Hydraulic Valves in Ningbo and asked how long it would take to produce 10 non-standard hydraulic pilot operated relief valves? I felt his anxiety and asked if he had encountered any difficulties in purchasing hydraulic relief valves. Only then did he tell me the embarrassment he had encountered in domestic manufacturers in the United States. According to the drawings and manifold schematic diagram of the hydraulic pilot operated relief valve provided by him, AAK engineers also suggested that the hydraulic pilot operated relief valve should be redesigned to reduce the length of the hydraulic pressure relief valve by 35%. AAK can send 10 hydraulic pilot operated relief valves within 30 days. Their engineers doubted this innovation, because if the size is reduced by 35%, the load of the hydraulic pilot operated relief valve will be affected.

We understood the concerns of their engineers. We would see the result in a month. If AAK hydraulic relief valve can not solve the problem of the manifold installation, we were willing to bear the loss. Jimmy was waiting for the sample of AAK with worry. After the samples were sent out, we soon received email from Jimmy. AAK newly designed hydraulic relief valve was successfully installed into the manifold, and the equipment commissioning was normal. Their engineers were satisfied. They were curious to know how AAK hydraulic pilot operated relief valve was reduced by 35% under the condition of ensuring parameter.

AAK adjusted the size of the spring chamber of the hydraulic pilot operated relief valve, and used Smalley wave spring which has smaller size and can be put into the smaller spring chamber of the hydraulic relief valve. The wave spring adopts the winding process. It is a thin circular springy metal element composed of several wave crests and troughs along the circumferential direction in a sinusoidal form, can withstand large loads even with a small amount of deformation, and the force is symmetrical. Thus, the length of the hydraulic pilot operated relief valve can be shortened.

AAK hydraulic pilot operated relief valve, has unique skills to solve the problem that American manufacturers can not do. You can also have a small try!

Achilleas comes from a Greek hydraulic equipment company. One of their rollers was complained by users because of oil leakage. After sales personnel found that there was a large gap in the valve block used for hydraulic manifold, which was the root cause of oil leakage. After further disassembling the hydraulic manifold, it was found that there were cracks in the lower left and right corners of the valve block. They thought that the problem can be solved by replacing the valve block. However, after 2 months of construction, the old problem was happened again. The engineer asked Achilleas to consult the original hydraulic manifold manufacturer. The manufacturer was not sure why the valve block broke within 2 months. Achilleas was helpless.

Achilleas realized that he could only contact AAK for help, because he also sent the inquiry for this hydraulic manifold to AAK before. At that time, AAK proposed to modify the oil circuit and hydraulic valve selection, but it was not accepted by their engineers. I was not surprised to receive his email. At the inquiry stage last year, our engineers found that there was an energy conflict between the oil circuit aperture of the hydraulic manifold and the selected hydraulic valve, resulting in the frequent instantaneous pressure rise of the hydraulic system. In particular, the oil circuit wall thickness at the left and right lower corners of the valve block is not enough, so it is not surprising that the valve block is cracked. This time, Achilleas didn't go to their engineers to verify.

AAK redesigned the oil circuit, re selected each hydraulic valve, and sent the hydraulic manifold block sample after 30 days.

Last week, Achilleas sent an email saying that after replacing with AAK sample for such a long time, there was really no problem. Moreover, the total price was saved by 20% compared with the original one, and the customer feedback that the action sensitivity was also improved a lot. This time, even their engineer also suggested that the boss should give the design and production of the hydraulic manifold block to AAK in the future. He also wants to know why AAK is so good?

I told him that the most important thing in the design of the hydraulic manifold block is to determine the operating parameters of the hydraulic system, understand the requirements of the system for the maximum working pressure and maximum flow, and reasonably design the oil circuit. Secondly, the pressure drop of the valve must be considered to ensure that the pressure drop through the pressure valve, flow valve and directional valve is not too high, which will affect the load action and cause the pressure problem of the valve block.

AAK has more than 20 years of industry experienced professional engineer from German HAWE company, who have unique experience in the design of hydraulic manifold blocks, especially in the oil circuit design. Combined with the system principle, through the reasonable selection of hydraulic valves and the innovative and optimized design of the oil circuit of the valve block, the oil leakage caused by high pressure can be avoided, and an efficient, economical and reliable hydraulic manifold block can be produced. Maybe there is no such second hydraulic manifold block manufacturer in Ningbo.

AAK hydraulic manifold block is economical, efficient and reliable. You can also try it!

I have some insistence that some of my counterparts in the hydraulic valve industry think that it is strange and even unnecessary. For many things, I am quite soft, but once those insistences are touched, I immediately become as hard as steel.

The price of hydraulic valves: as a hydraulic valve manufacturing company for more than 10 years, we have inquiries from new hydraulic valve customers every week, they are mostly B2B customers. These buyers are particularly concerned about one thing: price. This seems to be nonsense. Everyone cares about the price. What I am talking about is not the level of prices, but the consistency of prices.

Once, a hydraulic valve customer from Chile made an inquiry through e-mail. After several rounds of communication, he asked for my social account. I was a little puzzled. He asked privately: are you sure that the price you gave me is the same as others? I know that my Chilean counterparts also purchase hydraulic valves from AAK. I said of course. The same hydraulic valve, the same quantity range, and our price are always the same. He still seems worried. I know this is your principle, but have your colleagues really made no exceptions? I said no. I insist on that.

He said that last year, he purchased a batch of hydraulic valves from manufacturer A. The price was very expensive and the quality was good. It was a purchase order specially approved by his boss. A few days ago, his boss met one of his counterpart and learned that his counterpart also purchased the same batch of hydraulic valves from manufacturer A in the same quantity, but the price was much lower. The boss felt that he had been wronged. When he came back, he flew into a rage and asked me if I had taken a rebate. That was wrong.

For AAK hydraulic valve, it would be great to have one more customer. However, if there is one more customer, it is at the cost of hurting another customer who once trusted you by using the "big data" method, this is too "expensive". I insist on not being manufacturer A.

I said, I see. Trust me. The next day, his hydraulic valve PO came.

The punctuality of AAK hydraulic valve: in my mind, there is no punctuality, either early or late. You choose by yourself. At first glance, it seems strange, right? But when I think about it, we often say the word "punctuality". What's the perspective? This is the other side's perspective. For example, when a meeting is held at 8 o'clock, the other party expresses the schedule. What about changing to your own perspective? What's on time? I have only two choices. Because this is important, because I respect this group of people, because I have to do something else. In short, a positive idea will choose to arrive early. In AAK hydraulic valve, only early, not late.

AAK hydraulic valve, there are still many more strange insistence.

For example, in the discussion on the development technology of hydraulic valves, we insist on not saying anything we don't agree with. For this reason, we have offended the customer's engineer and cancelled the order. For example, we insist on not giving rebates. Some buyers are willing to add a few more points to the PO, and then give them rebates. This makes it difficult for me to explain to his boss. These insistences, in my counterparts’ opinion, may be completely unnecessary or even totally wrong. But these are my insistence. Please don't touch, I insist. But what if one day, because of these insistences, the company goes bankrupt? Then go bankrupt.

I have always believed that no matter in business or in communication with people, there are 3 most important elements: the first is honesty, the second is frankness, and the third is trust. Business method can decide how high to fly, and business ethics can decide how far to fly. You might say, what if you can't be yourself voluntarily? If there is no way to do the right thing, at least not to do the wrong thing; if there is no way to tell the whole truth, at least not to tell lies.

The fundamental solution is to engage in the production of hydraulic valves, not to do evil, not to fabricate, not to be greedy, to do a good job in the manufacturing quality of hydraulic valves in a down-to-earth manner, and to give back to customers. When the company is faced with the difficult decision of performance and dream, what the company needs is a real crisis, so that all internal forces can feel the real crisis of death, the crisis of trembling performance, and the crisis of silence for all. Then the company can be reborn. For individuals, only by choosing integrity values can they go further and more steadily.

AAK hydraulic valve can only take a road that few people take and do difficult and correct things. All the difficult things will become simpler, and the simple things will become more and more difficult. Because the difficult road is never crowded.

Let's bless AAK hydraulic valve.

Mike is a Canadian customer who has cooperated with AAK for more than 2 years, and he has been very smooth in purchasing hydraulic valves. But in May this year, he suffered a lot in purchasing this hydraulic pressure valve. The order for a hydraulic pressure valve originally supplied by an American manufacturer, was not accepted by the manufacturer due to capacity. He contacted some Chinese hydraulic pressure valve manufacturers. To his surprise, most manufacturers offered 20% more than the original American manufacturer, and two of them were about the same price as the American manufacturer, however, the surface roughness and diameter tolerance of the hydraulic pressure valve samples were not up to standard. Mike was distressed that he couldn't find a substitute for the original American hydraulic pressure valve manufacturer.

Mike knows that AAK HYDRAULIC VALVE is a manufacturer that pays attention to quality, and its price will be higher than that of its domestic counterparts. With regard to this hydraulic pressure valve, he emailed me and asked why most manufacturers offered 20% more than the original American manufacturer? For this abnormal situation, I told him directly that it must be due to the high defective rate of processing. AAK is confident that the price is cheaper than American manufacturer, and the quality is not inferior to American manufacturer.

According to the drawings of the hydraulic pressure valve issued by him, AAK technical team found that the processing was really exquisite. It requires that the coaxiality and roundness of the Φ8mm/Φ9mm hole should be less than 5μm, and the Φ15mm/Φ9mm orifice should be free of burrs. To guarantee coaxiality and roundness requirements of 5μm, and keep the inner wall of the hole at 0.6μm roughness, at least 50% of valves should be scrapped according to the existing processing technology. This confirms my guess that why the quotation of domestic manufacturers is 20% higher than that of American original manufacturer.

Mike was not calm after receiving the quotation of AAK hydraulic pressure valve. He repeatedly confirmed with me whether the price was wrong? The price of AAK is not only cheaper than that of domestic manufacturers, but also 30% cheaper than that of American manufacturer. I told him that this hydraulic pressure valve can only be drilled and reamed for many times by domestic peers, which not only has a long processing cycle, but also is difficult to ensure the processing accuracy. At the same time, the whole hole processing including tool change time is at least 210 seconds, and most of the tool life is less than 500 holes, which is time-consuming, money consuming, and what is worse, the qualified products are very limited. Of course, the cost is high. Mike asked me to try the sample directly. 2 weeks later, we sent the hydraulic pressure valve sample. 5 days later, Mike’s team confirmed the quality of AAK hydraulic pressure valve at one time, and the production time provided by AAK was less than half of domestic peers.

For processing this hydraulic pressure valve, we use integral cemented carbide tools, and use 3 efficient tools to replace the original 9 tools. We also use special guide strips and internal cooling design to maintain tool life and improve cutting speed and machining accuracy. The number of inner holes can be stabilized at 3000, which is 6 times that of peers. The internal leakage of the whole machine has also been reduced from 1.6 to 1.1, and the processing and tool change time has been reduced to 45s, which is only 22% of peers. Such efficient and high-quality processing is not our temporary idea, but the result of adhering to technological innovation. There may not be such a second hydraulic pressure valve manufacturer in Ningbo.

AAK hydraulic pressure valve is benchmarked to the quality of American manufacturer. You are welcome to test an order.

Today, Eichendorff from Germany placed a re-order for 500 hydraulic pilot operated pressure control valves and told us that his boss was very satisfied with the quality of AAK. It has been more than 1 year since the last purchase of hydraulic pressure control valves, and no customer complained about unstable pressure supply. At the beginning of last year, one of their hydraulic power units was complained by customers that the pressure supply was often unstable after using a period of time. They judged that there was a problem with the hydraulic pilot operated pressure control valve. After the valve was replaced, the pressure supply of the equipment was normal. Eichendorff sent the replaced valve back to the original hydraulic pressure control valve manufacturer. After inspection, the manufacturer found that the parameters and functions were produced according to the requirements of Eichendorff's company. He thought that they had moved the pressure regulating screw of the hydraulic pressure control valve during installation. After measurement, Eichendorff's engineers found that all parameters of the original hydraulic pressure control valve could be benchmarked, but they did not change the pressure regulating screw during installation.

Eichendorff contacted several local German hydraulic pressure control valve manufacturers, and most of them were unwilling to analyze. After browsing AAK website on Google, Eichendorff sent an email and asked: what is the reason for the unstable pressure supply of the hydraulic pressure control valve after using a period of time? AAK HYDRAULIC VALVE often receives similar questions, and we are happy to solve these problems, because this is the best source for accurate customers. Eichendorff sent us the samples, drawings and hydraulic system schematic diagram of the hydraulic pilot operated pressure control valve the next day. 1 week later, AAK engineers disassembled the hydraulic pressure control valve and found 2 possibilities in combination with various technical parameters. First, the design of the damping hole of the hydraulic pilot operated pressure control valve should be improved. The ratio of the opening pressure to the set pressure is a little high, which will cause too large pressure regulation deviation, thus affecting the stability of the valve. Second, the type selection of the spring of the hydraulic pilot operated pressure control valve is not suitable, and a spring with better elasticity is required.

After receiving our diagnosis, Eichendorff hoped that AAK could test the samples according to our ideas and was willing to pay the development cost. AAK technical team spent 24 days and tried samples for 6 times, and found the most suitable pressure ratio, adjusted the original design of the damping hole, selected 3 springs with good elasticity to compare, and determined the special SiCr alloy steel spring as the spring of the hydraulic pilot operated pressure control valve. After 30 days, 30 samples were sent.

3 months later, Eichendorff informed by email that when AAK hydraulic pilot operated pressure control valve was used, no customer complained about unstable pressure supply. I replied that according to previous customer feedback, there will be no customer complaint about unstable supply within 1 year. Eichendorff probably didn't believe it until 1 year later, today, the reorder of the hydraulic pressure control valve came. Eichendorff admired AAK service and professionalism from the bottom of his heart.

AAK hydraulic pressure control valve is not only professional, but also good at what peers are unwilling to do. Welcome to have a try!

Oliver comes from a hydraulic equipment company in Canada. At the end of last year, they planned to develop a hydraulic cylinder that uses a hydraulic directional control valve. The parameter requirements are high, especially the internal leakage should be less than 2drops/min. Oliver inquired about more than 10 manufacturers of hydraulic directional control valves. Only one supplier who had cooperated for 5 years told him that he was 90% sure. Other manufacturers surrendered. One month later, the hydraulic directional control valve was installed with the oil cylinder. Less than 12 hours after startup, the hydraulic oil cylinder was unstable during reciprocating motion. After disassembly, the engineer found that the hydraulic directional control valve had internal leakage exceeding the requirement of 2 drops/min. Oliver was very helpless. He continued to look for new manufacturers of hydraulic directional control valves, and they all basically replied that they could not meet the requirement of internal leakage.

Oliver found an article on Google, "The internal leakage index is equaled to the local manufacturer in Germany, but AAK hydraulic threaded cartridge valve has better cost performance”, and left a message on our website: can you customize the hydraulic directional control valve with internal leakage of 2drops/min? At first glance, I knew that this was an accurate customer consultation. Although the internal leakage of 2drops/min was difficult, AAK had mass production 1 year ago. We suggested him send us the drawings and working condition requirements of the hydraulic directional control valve, and AAK can make samples directly. If the internal leakage of the hydraulic directional control valve does not meet the standard, 100% of the development cost will be returned.

According to the development data provided by Oliver, there may not be any other manufacturer that can provide guarantee except AAK. After 30 days, AAK successfully sent 8 hydraulic directional control valve samples. Three months later, Oliver informed that no abnormality of the hydraulic directional control valve was found during the 3 internal commissioning of his company. After the hydraulic cylinder was tried out by the user, the feedback was also very good. Oliver is curious about the hydraulic directional control valves surrendered by so many manufacturers. Why did AAK samples succeed at one time?

AAK hydraulic directional control valve has 3 absolute advantages and has already surpassed its domestic counterparts:

1. The precision honing machine imported from the United States is used to finish the valve hole and valve spool of the hydraulic direction control valves for more than 3 times. The dimensional accuracy of the valve hole is IT7 ~ 4, and the surface roughness can reach Ra 0.32 ~ 0.04μm, thus meeting the requirements of high accuracy.

2. AAK engineer team, select the raw materials and spare parts based on the requirements of working conditions, and never follow the ordinary market. Especially in the customization of high requirement hydraulic directional control valves, they have rich experiences and cases.

3. AAK has been OEM factory of hydraulic valves for 3 of the world's top 500 companies for 10 years. The quality control process is more strictly self-executed than the ISO certification system. It sticks to manufacturing details, focuses on process innovation, and focuses on technology research and development. Ensure that each hydraulic directional control valve has anti fatigue, high precision and long service life.

AAK hydraulic directional control valve, 2drops/min internal leakage, you can also have a small try!

Ernst is from a German hydraulic equipment company. He has been doing well in recent years, and his boss is optimistic about him. The hydraulic relief valves purchased this time has suffered a big setback. In the second half of last year, the hydraulic power unit sold by their company for less than 3 months was complained by customers. When the pressure of the hydraulic relief valve was adjusted to 450bar, the equipment idled. The engineer thought that it could be solved by changing the motor. As a result, after the equipment started for a while, the same situation happened again. The engineer checked each component, and it turned out that the spool of the hydraulic relief valve was stuck. After the boss knew about it, he asked Ernst to request the original hydraulic relief valve manufacturer to solve the problem and bear the motor cost twice. Per the manufacturer, the price of the hydraulic relief valve is too low this time. Under the high pressure of 450bar, it is difficult to avoid a few stuck occasionally, then there is no further news.

Ernst had no choice but to find new hydraulic relief valve suppliers. Ernst contacted more than 10 factories and requested that the hydraulic relief valve be 100% free of jamming within 1 year under the high pressure of 450bar. Only two factories were willing to cooperate with the samples, and other manufacturers gave up directly. Ernst still seemed worried about wasting time. With the introduction of his friend Steven, who is our old customer, he contacted AAK hydraulic valve. Ernst asked us to make samples directly according to his hydraulic relief valve drawings and working conditions. The key of this hydraulic relief valve is how long the service life of the hydraulic relief valve is under 450bar high pressure? Actually, AAK has already mass produced hydraulic valves with similar requirements.

Nine months later, Ernst informed by e-mail that the hydraulic relief valve from one factory had been on strike because of its stuck, and the other factory's, although still working, it was estimated to be less than 12 months. After 9 months of use, the parameters of AAK hydraulic relief valves are still stable and function normally. Ernst said that compared with more than 10 factories, AAK high-pressure hydraulic relief valve has the most stable performance and longest service life among all the manufacturers he knows. Ernst estimated that he would not need to change the hydraulic relief valve suppliers any more.

AAK hydraulic relief valve has 3 advantages and has already surpassed its domestic counterparts.

1. AAK has a high-precision CNC machining center imported from Switzerland and its own upgraded and refitted independent fixture, which eliminates human errors. The high-precision control of component processing is the key point to prevent jamming.

2. AAK has engineer team with over 10 years of technical experience, independent professional research and development, with unique research and development technology, select the raw materials and spare parts according to the working conditions of customers' actual needs. The selection of materials is the key to determine the service life of the hydraulic relief valves.

3. Through EasyForm software, AAK can accurately and quickly measure each valve component to ensure that the concentricity of each hydraulic relief valve is 100% consistent and prevent jamming. Detection is the final check on the quality control of the hydraulic relief valves.

AAK hydraulic relief valve is resistant to high pressure and has no jamming. You can also have a small try!

Our hydraulic valve customer Pablo from the Netherlands has an order for hydraulic relief valves. Although the order qty is only 800, it requires very high precision of grooves. He asked me for a quotation at the first time, but he thought that the quotation of AAK hydraulic relief valve was 20% higher. I also agreed with him to check with the price other hydraulic relief valve manufacturers. Pablo consulted all the hydraulic valve suppliers on hand, and most of them said that they could not achieve the groove accuracy of the hydraulic relief valve drawing. Only 2 factories could have a try, but the price was at least 60% higher than that of the conventional hydraulic relief valves. Moreover, only after the sample was made, they could know whether the groove accuracy could meet the standard. Pablo was a little confused. After wasting a week, he returned to AAK Hydraulic Valve.

Pablo was surprised that most manufacturers could not do the groove precision of hydraulic relief valve, which seemed to be a very conventional process. I told him that the cutting and processing area of this hydraulic relief valve was closed, with high resistance of the cutting tools, fast wear and tear, and difficult chip removal. The groove precision was even more difficult to ensure, that is, the conventional processing technology was not feasible, which was also the reason why so many hydraulic relief valve manufacturers gave up. At the same time, I told him that the two hydraulic relief valve manufacturers who were willing to try were 60% more expensive because they used high-speed milling to avoid tool damage and improve groove accuracy. This technology is not only costly, but also has very strict requirements for the entire processing system. Otherwise, the accuracy cannot be guaranteed, and most manufacturers cannot control this technology.

Pablo was surprised by our understanding of the industry. It seems that he can only choose AAK to make the samples. Two weeks later, we successfully sent 6 samples of hydraulic relief valve. Their engineers approved AAK hydraulic relief valve samples at one time after receiving them. I fed back to Pablo that AAK adopted UG CAD module to solve this processing problem. No hydraulic relief valve manufacturer in Ningbo would think of using this technology.

This technical point is imported from Germany. The CAD module of UG is used to model the geometric parameters of the groove, and then the CAM module of UG is used to NC program the machining of the groove of the hydraulic relief valve. The tool path and cutting method are set by programming. The NC program thus obtained can carry out the precise machining of the groove and solve the problem of chip removal. The reason why AAK can effectively deal with the high-precision machining of hydraulic relief valve groove is that after generating the tool path of machined parts, the whole process is simulated by using the simulation function of UG software. Our technicians can clearly see the processing path of the processing tool, that is, turn the closed area into a visible area. After the simulation, determine the tool direction through UG software, and then import it into the file of the NC machine tool to generate the code for executing the command.

AAK hydraulic relief valve groove processing adopts simulation modeling technology, which not only reduces the cost, but also ensures the accuracy. You are welcome to try the order.

Giacomo is the purchasing manager of a German hydraulic equipment company. Last year, the hydraulic lifting platform designed by his company was very creative and needed to purchase a hydraulic pilot operated relief valve. It was originally planned to be promoted on the exhibition at the beginning of the year, but the test run was not smooth. There was vibration and loud noise during the lifting process. The problem was the hydraulic relief valve. Giacomo was confused because the valve came from an old hydraulic relief valve manufacturer who had cooperated for 5 years. According to the manufacturer, this hydraulic relief valve sample was completely made based on the drawing, and the accuracy, flow, pressure and other requirements fully comply with the original design. The engineer realized that there might be a problem in the design, and asked Giacomo to contact several hydraulic relief valve manufacturers, hoping to get some constructive suggestions. It has been a month, but no progress has been made.

Giacomo suddenly remembered that during the last communication with Gerrit of Caterpillar, Gerrit mentioned that AAK Hydraulic Valve has great design ability. With Gerrit's introduction, Giacomo told me about their current difficulties, and also sent the original drawing of the hydraulic relief valve and the video of the test run. After repeated comparison and several internal discussions, AAK technical team basically determined the cause of vibration of the hydraulic relief valve and the preliminary solution.

I told Giacomo that we are 90% sure, but AAK needs to redesign the hydraulic relief valve, which will take 6-8 weeks. Giacomo paid $2,000 for the development the next day. Six weeks later, AAK sent the newly designed hydraulic relief valve samples. A week later, Giacomo sent a video of the machine testing. The vibration and noise were gone, and the whole machine could rise and fall freely. Their engineers disassembled AAK hydraulic relief valve, only then did they know that AAK design was brilliant and had a sigh of "so it is".

AAK adds parts to the resonant cavity of the hydraulic pilot operated relief valve, which reduces the volume of the resonant cavity and increases the stiffness of the oil under negative pressure. According to the principle that the components with high stiffness are not easy to resonate, we have adjusted the internal design of the hydraulic relief valve, added a vibration damping sleeve and a vibration damping pad to the pilot valve, and set various damping holes on the vibration damping sleeve to increase damping to eliminate vibration. The vibration damping pad can cooperate with the resonant cavity and move freely. There is a throttling groove on the front and back of the vibration damping pad, and the oil can also produce damping effect when flowing to change the original flow.

Giacomo privately informed that after the successful test run, the whole team was very happy and their engineers admired him more and more.

AAK hydraulic pilot operated relief valve, no vibration, no noise, you can also have a small try!

Nowadays, people's recognition of the quality of "Made in China" products is much higher than that of 10 years ago. In fact, this recognition is still lagging behind. For example, the Chinese hydraulic valve manufacturers at the head can rank among the top 20% of the world's hydraulic valve industry only from the manufacturing quality of hydraulic valves. This is also an explanation for why Sun hydraulics directly import finished products from China. I believe that in 10 years, the hydraulic valves engraved with "Made in China" will account for more than 70% of the weight.

AAK Hydraulic Valves, 13 years ago, changed from a hardware enterprise to hydraulic valve production. We started with the manufacturing process and learned by doing. We paid a lot of tuition fees and accumulated the production technology and experience of hydraulic valves. Then slowly improve the technology according to their own production needs, refit some equipment and create some patents. Until now, the sales volume of hydraulic valves has gradually expanded, and AAK technology has gradually moved forward. At the same time, more resources have been invested in research and development to promote more basic and wider application of hydraulic valves. In a word, there is no strong hydraulic valve manufacturing, others are floating clouds.

In industrial manufacturing, there is no major technological innovation country in the world that did not start with a major manufacturing country (at least once). The advantages of China's hydraulic valve manufacturing industry chain have been self reinforcing in recent years, and continue to attract first-class hydraulic valve brands in the supply chain to set up factories in China. AAK has been OEM factory of hydraulic valves for 3 of the world's top 500 companies for 10 years. The quality control process is more strict than the ISO certification system. It sticks to the manufacturing details of hydraulic valves, focuses on process innovation, and insists on technology research and development. Ensure that each hydraulic valve has anti fatigue, high precision and long service life.

What I want to say to the domestic hydraulic valve counterparts is that 20% of the hydraulic valve manufacturers already have quality awareness. What should the remaining 80% of the manufacturers do?

Many domestic hydraulic valve peers lack concentration and patience, and specialization is to follow. Because in the past, when we set up enterprises, we could still make money by taking one shot at a time. The vast majority of hydraulic valve manufacturers are money worshippers, not technology worshippers. The vast majority are short-term, not long-term. In the past, they could survive and make money. However, after the construction of the national unified market and under the background of the globalization of industrial products, this kind of thinking will be completely over and impossible.

In Japan's manufacturing industry, there is a word called "life dedication", a whole life for one thing. This is the Japanese concept. In fact, the Germans are the same. They have focused on one category or variety for decades or even hundreds of years. This is also the reason why they both are top ones in cutting-edge manufacturing. This is also the direction of AAK Hydraulic Valves. A group of people only work on hydraulic valves all their lives.

There is another word in Japan called "one product into the soul". In order to make this product, the soul must be cast into it. To make a product, we should be attentive and soul-bound. I think that "life dedication " and "one product into the soul" constitute the core connotation of Japan's invisible champion. AAK is aiming at the invisible champion of Chinese hydraulic valves, and it acts the same.

AAK Hydraulic Valve always focuses on 3 directions, the first is focus, the second is innovation, and the third is internationalization. Globalization is a trend of historical development. Although there are some effects against globalization, the historical trend will not change after all and will not be transferred by people's will.

AAK puts "focus, innovation and internationalization" into the soul of the anti fatigue, high precision and long service life hydraulic valves. This is our way. The right way is not far away.

Last Monday, Yvonne ordered 1,000 hydraulic pilot operated relief valves and stressed that all parameters should be in line with the hydraulic relief valve samples of last year. It seems a little strange. After we sent the samples last year, Yvonne said that the parameters were up to standard, but the plan changed. She would no longer purchase this hydraulic pilot operated relief valve. After several rounds of communication, it was learned that Yvonne changed the manufacturer last year and had suffered a loss, so she returned to AAK to make up the order.

Yvonne, from a Canadian equipment company, started cooperation with AAK last year. At the beginning of last year, their company planned to develop a hydraulic power unit, which needed to purchase a hydraulic pilot operated relief valve. After a round of screening, Yvonne chose 3 hydraulic relief valve manufacturers to test samples, and AAK was one of them. Finally, Yvonne placed the order with the hydraulic relief valve manufacturer with lowest price. In more than half a year, customers complained that the hydraulic pressure of the equipment was unstable. The pilot operated relief valve in the system is used as a safety valve, but the valve spool and valve body are worn and the coaxiality is deviated, resulting in abnormal valve opening and sharp rise of system pressure, resulting in equipment failure.

According to the feedback from the manufacturer of the original hydraulic pressure relief valve, this hydraulic pilot operated relief valve needs to meet the high-pressure working condition of 450bar and cannot withstand such high-frequency use. It can only be guaranteed the service life of half a year, and has to be replaced every half a year for after-sales service. The boss was not satisfied with the half year service life of this manufacturer and asked to change the hydraulic relief valve supplier. According to the records of the after-sales department, Yvonne found that among the samples from 3 factories, only the equipment installed with AAK hydraulic relief valve has no complaint record. The service life of the other one was about 10 months, but AAK was normal after 1 year. I told Yvonne that according to previous customer cases, the 18 month service life of this type of hydraulic relief valve under 450bar high pressure is not a problem, because we are benchmarking the service life of 2 million times of HAWE.

She also wants to know why the service life of AAK hydraulic pilot operated relief valve is better than that of other factories? The selection of materials is the key to resist 450bar high pressure. Generally, AAK selects A+ material to replace the A material used by the international top brands. For example, the 20crni2mov high carburized bearing steel imported from Germany, is used as the valve spool of this hydraulic relief valve, combined with the carburizing pretreatment process, through the secondary quenching + cryogenic treatment + low temperature tempering process, it is cooled to 650 ~ 700 ℃ and then discharged after it is cooled to 450 ~ 500 ℃. The microhardness is 237 ~ 247 HV, and its wear resistance and contact fatigue performance are increased by more than 3 times, so the wear of valve spool is no longer worried.

Yvonne privately told us that the boss was very satisfied with her ability to quickly solve problems. AAK hydraulic relief valve with a service life of 2 million times will be their fixed supplier in the future.

AAK hydraulic pilot operated relief valve, is high pressure resistant, with 2 million times of service life, you can also have a small try!

Edmund from Germany has purchased hydraulic valves from AAK for more than 3 years. He emailed me a question this morning: the SiCr alloy steel pressure spring is used in hydraulic pressure reducing valves, and its durability can not reach 1million times or more? I asked him why he suddenly asked so? He frankly told me that he had encountered problems when purchasing hydraulic pressure reducing valves from Germany factory. At the same time, he also saw an article of AAK that " For hydraulic pressure control valves that German manufacturers were unwilling to solve, AAK used special spring to ensure a service life over 1 year”, so he wanted to discuss it with me.

At the beginning of last year, the hydraulic pump of the excavator they sold often had insufficient startup pressure. The problem lied in the hydraulic pressure reducing valve of the hydraulic pump. The pressure of the hydraulic system was unstable because the pressure spring of the hydraulic pressure reducing valve was deformed. Since this excavator has been in use for less than 1 year but the hydraulic pressure reducing valves must be replaced. Edmund contacted the local original manufacturer to replace several hydraulic pressure reducing valves. The manufacturer replied that the hydraulic pressure reducing valve was produced according to the standard, and the strength limit and elastic limit of the piano wire used for the spring were in line with the requirements. The problem was that the user's use frequency and working pressure were too high, problem was caused by improper use. This time, they were willing to replace it for free, and they would have to pay for it next time.

Edmund is aware that if there is a complaint about one device, there may be a complaint about the second one. This time, the replacement of the hydraulic pressure reducing valve can only solve the current problem. Edmund began to contact nearly 20 manufacturers of hydraulic pressure reducing valves. Most of them said that the spring made of piano steel wire was the best material. Edmund asked several factories to provide samples for testing to simulate the high frequency and high pressure of excavators. After more than 2 months of durability testing, the durability of the spring failed to pass 1 million times, and basically began to be unstable after 400,000-600,000 times.

I joked that he found the right person to solve this problem. The spring of piano steel wire is indeed a good material, but good materials do not necessarily produce good finished products. We strictly follow 3 steps in the selection of spring. The pressure spring of this hydraulic pressure reducing valve really needs better materials to pass the durability of 1 million times. AAK Hydraulic Valve began to innovate the pressure spring 1 year ago. At the request of the customer, AAK technical team spent 24 days, tested samples for 6 times, compared 3 kinds of springs with good elasticity, and selected the special SiCr alloy steel spring, which can pass the durability of 1 million times. SiCr alloy steel spring has high temperature resistance, high rigidity, anti relaxation and long service life. It can be used for 1 million times under high stress conditions.

Edmund asked me to send samples. According to his hydraulic pressure reducing valve drawings, I told him that samples could be sent in 4 weeks. I also told him that using AAK hydraulic pressure reducing valve with SiCr alloy steel pressure spring, he would no longer have to worry about complaints.

AAK hydraulic pressure reducing valve is protected by special SiCr alloy steel spring under high stress, with a service life of 1 million times. You can also have a small try!

Last week Logan said that he needs to order 1,000 hydraulic check valves at one time and asked me to hurry up to prepare materials. After reading this email, I felt very good. Logan comes from a Canadian hydraulic equipment company. Two years ago, he found AAK Hydraulic Valve on the Internet. The hydraulic elevator to be developed by their company needed to use special hydraulic check valves. He asked AAK to make 20 hydraulic check valve samples urgently according to his drawings, and promptly paid the development cost. According to the drawing, the O-ring of the hydraulic check valve is a little special, and each component needs to be customized. It took more than 2 months for AAK to successfully finish and send 20 hydraulic check valves. Strangely, after samples were sent, there was no news in 9 months until Logan's email last week.

Logan also frankly told us why we did not receive the feedback until now. It turned out that their company had selected 3 factories to test the samples of this hydraulic check valve. In the first test, the samples from all the 3 factories reached the standard, so they chose the cheapest one to place an order. Six months later, they knew the trouble was coming. The customer reported that the lift was unable to rise. After checking, it was found that the hydraulic check valve leaked and did not maintain pressure. The reason for the leakage was that the O-ring of the hydraulic check valve was out of the groove and worn.

Logan contacted the original hydraulic check valve manufacturer, and the manufacturer replied that the O-ring was a quick-wear part. If the customer used it frequently, the quick-were part needs to be replaced every 6 months, and the O-ring replacements can be provided free of charge. However, in such frequent after-sales, the sealing ring is a small amount of money, but the after-sales cost is the big trouble. Moreover, the customer may not accept it.

Logan checked the original archived samples again to verify the reliability of the O-ring of the hydraulic check valve, and found that the O-ring of AAK was different from that of other manufacturers. He also remembered that AAK was the latest one to deliver samples at that time. Their engineers compared and tested the O-ring of the hydraulic check valves again, and found that the O-ring of AAK was not only different in material, but also different in structure.

How does AAK do it? The selection of O-ring should not only be based on the working conditions of hydraulic check valve, but also strictly control the size. With the special design of this hydraulic check valve, the pressure on the O-ring comes from the inside. The outer edge of the O-ring will contact the outer edge of the groove. The compression ratio can only be between 1% and 3%. Considering that the shrinkage of the O-ring will cause tolerance, AAK has customized samples for 8 times to determine the allowable tolerance range of O-ring, which is 15% higher than DIN 3771 and ISO 3601/1 standards. Finally, the ultra wear-resistant PU polyurethane rubber O-ring with reasonable size was selected, and it was guaranteed that the O-ring would not fall out of groove and wear within 1 year.

AAK hydraulic check valve, with O-ring that does not fall off groove and wear, you can also have a small try!

Margaret is from a hydraulic equipment company in the United States. At the end of last year, some of their drilling rigs were complained by customers that they were unable to work. The problem was the leakage caused by the wear of the hydraulic flow control valves. The original hydraulic flow control valve manufacturer said that due to long-time high-pressure and high-frequency operation, the wear of the valve body is difficult to avoid, so the hydraulic flow control valves can only be replaced. After half a year, the fault occurs again, and it seems that the hydraulic flow control valves can only be replaced once every half a year. After the boss knew about it, he was not satisfied with this high frequent after-sales service. He asked Margaret to find a new hydraulic flow control valve manufacturer, and added the parameter requirements of high pressure resistance in the inquiry.

In the first round, Margaret contacted with more than 10 hydraulic valve suppliers that she was satisfied with in the past, and only 3 said that they could have a warranty period of half a year to 1 year under high pressure. Margaret should not be satisfied with this reply either. After being introduced by one of our old customers, she contacted me. I suggest that she use durability to measure the service life of hydraulic flow control valves. After communicating with their engineers, she requested that the durability of this hydraulic flow control valve be more than 1.5 million times.

AAK engineers judged that according to their working conditions and pressure requirements, the material selection of this hydraulic flow control valve is very important, especially the valve body material. After 40 days, AAK sent 10 samples of hydraulic flow control valves. More than 2 months later, Margaret emailed that the durability tests of 3 factories and AAK hydraulic flow control valves had failed. Before sending samples, our engineers tested each hydraulic flow control valve, and the durability of 1.5 million times is unlikely to fail. After checking with Margaret, it was learned that their boss specially asked the engineer to increase the durability test from the original 1.5 million times to 2million times.

Margaret said that the other 3 factories have given up re testing, and asked whether we are willing to continue testing?

AAK is most willing to do what its peers are unwilling to do. Three months later, the samples of the hydraulic flow control valves were sent again. Last week, Margaret said in an email that AAK hydraulic flow control valves passed the test and is the only manufacturer that can adhere to the samples for half a year. Their teams are convinced that AAK is obsessed with manufacturing quality. The boss was also very satisfied that she found a professional hydraulic flow control valve supplier like AAK.

Over the past 13 years, AAK technical team has gained an experience that every customer thinks that the problems they encounter are individual and unique. In fact, we have already solved them here. Why do you have personalized questions? That's because none of your peers can help you solve it, let alone promise. During the test sample period, AAK engineers worked for more than 14 hours every day. After repeated defeats, they finally determined 3Cr3Mo3W2V hot work die steel as the valve body material and made special treatment on heat treatment. The mechanical stress is more than 10 times that of other steels. The hardness, strength, wear resistance, stability and thermal conductivity are completely consistent in the whole material section, so as to ensure that the hydraulic flow control valves can pass the test of 2million times under high pressure.

AAK hydraulic flow control valve, 2 million times of service life, you can also have a small try!

Margaret is from a hydraulic equipment company in the United States. At the end of last year, some of their drilling rigs were complained by customers that they were unable to work. The problem was the leakage caused by the wear of the hydraulic flow control valves. The original hydraulic flow control valve manufacturer said that due to long-time high-pressure and high-frequency operation, the wear of the valve body is difficult to avoid, so the hydraulic flow control valves can only be replaced. After half a year, the fault occurs again, and it seems that the hydraulic flow control valves can only be replaced once every half a year. After the boss knew about it, he was not satisfied with this high frequent after-sales service. He asked Margaret to find a new hydraulic flow control valve manufacturer, and added the parameter requirements of high pressure resistance in the inquiry.

In the first round, Margaret contacted with more than 10 hydraulic valve suppliers that she was satisfied with in the past, and only 3 said that they could have a warranty period of half a year to 1 year under high pressure. Margaret should not be satisfied with this reply either. After being introduced by one of our old customers, she contacted me. I suggest that she use durability to measure the service life of hydraulic flow control valves. After communicating with their engineers, she requested that the durability of this hydraulic flow control valve be more than 1.5 million times.

AAK engineers judged that according to their working conditions and pressure requirements, the material selection of this hydraulic flow control valve is very important, especially the valve body material. After 40 days, AAK sent 10 samples of hydraulic flow control valves. More than 2 months later, Margaret emailed that the durability tests of 3 factories and AAK hydraulic flow control valves had failed. Before sending samples, our engineers tested each hydraulic flow control valve, and the durability of 1.5 million times is unlikely to fail. After checking with Margaret, it was learned that their boss specially asked the engineer to increase the durability test from the original 1.5 million times to 2million times.

Margaret said that the other 3 factories have given up re testing, and asked whether we are willing to continue testing?

AAK is most willing to do what its peers are unwilling to do. Three months later, the samples of the hydraulic flow control valves were sent again. Last week, Margaret said in an email that AAK hydraulic flow control valves passed the test and is the only manufacturer that can adhere to the samples for half a year. Their teams are convinced that AAK is obsessed with manufacturing quality. The boss was also very satisfied that she found a professional hydraulic flow control valve supplier like AAK.

Over the past 13 years, AAK technical team has gained an experience that every customer thinks that the problems they encounter are individual and unique. In fact, we have already solved them here. Why do you have personalized questions? That's because none of your peers can help you solve it, let alone promise. During the test sample period, AAK engineers worked for more than 14 hours every day. After repeated defeats, they finally determined 3Cr3Mo3W2V hot work die steel as the valve body material and made special treatment on heat treatment. The mechanical stress is more than 10 times that of other steels. The hardness, strength, wear resistance, stability and thermal conductivity are completely consistent in the whole material section, so as to ensure that the hydraulic flow control valves can pass the test of 2million times under high pressure.

AAK hydraulic flow control valve, 2 million times of service life, you can also have a small try!

Friedlich, from Wirth company in Germany, sold the drawworks of oil drilling rigs to the Middle East at the beginning of last year. Six months later, the customer complained that the disc brake controlled by the hydraulic cylinder of the drawworks was weak, resulting in equipment shutdown. The reason was that the hydraulic flow control valve in the hydraulic system was stuck. Friedlich wondered that the same batch of drilling rigs and drawworks had been sold to Canada, Central Europe and other markets for almost 1 year, and there was no such abnormality. The original manufacturer of the hydraulic flow control valves is not sure why it is stuck for half a year, but is willing to offer 30 hydraulic flow control valves for replacement and send them to the Middle East. Friedlich was very worried about such solution without knowing the cause of the stuck valve spool. Sure enough, a batch of hydraulic flow control valves had to be replaced 6 months later. This frequent after-sales service not only costs a lot, but also makes the customer dissatisfied. The boss asked Friedlich to purchase new hydraulic flow control valves with high temperature resistance and durability of more than 1 year as soon as possible to replace the current ones.

Friedlich found AAK on the Internet and left a message to us: why does the same hydraulic flow control valves have twice the service life difference in different working scenarios? I was puzzled when I saw this message. I learned the above story after communication. Our engineer checked the drawing of hydraulic flow control valve sent by Friedlich, and there was no problem from a technical point of view. The probability is that the high temperature in the Middle East and the high-frequency operation of the drawworks will lead to high hydraulic oil temperature and thermal deformation of the valve sleeve, which will reduce the matching clearance between the valve sleeve and the valve spool, affecting the movement of the valve spool until the valve spool is stuck. Friedlich learned that when the drawworks work, the oil temperature is above 70 ℃, while the oil temperature of the normal hydraulic system is 30 ℃ -50 ℃. Friedlich seemed to agree with our analysis and asked AAK to send samples of hydraulic flow control valves as soon as possible.

AAK engineers know that the core of this hydraulic flow control valve lies in the material selection of the valve sleeve. It depends on the job of our full-time material engineers. After 2 months' efforts, 6 kinds of materials were tested, and a special hot work die steel was determined as the valve sleeve for the hydraulic flow control valve. Its heat fatigue resistance and toughness fully adapt to high-temperature hydraulic oil, and the hardness and wear resistance of the material can also fully withstand the wear of more than 1 year. Eight months after the samples of AAK hydraulic flow control valves were sent out, Friedlich informed us that there was no complaint of valve spool jamming when AAK hydraulic flow control valves were used. I told him that within 12 months, if there was a complaint of valve spool jamming, we would refund all expenses.

AAK has a full-time Material Engineer in the selection of materials. He connects with the materials research institute and university laboratories to master new materials at the first time. He is specially responsible for screening, comparison and testing, and matching suitable materials according to the working conditions of the hydraulic valves, instead of general materials in the market., In the selection of raw materials and spare parts, it is targeted from the requirements of working conditions and never goes with the market trend. Especially in the customization of hydraulic valves with high requirements, there are unique methods and cases.

AAK hydraulic flow control valve, under high temperature, free of worry in 12 months, you can also have a small try!

Jone is a hydraulic customer from Canada. In recent years, his purchasing of hydraulic valves has been very smooth. However, an urgent order of 200 hydraulic valve blocks in his hand recently gave him a headache. The customer reported that 70% of the hydraulic valve blocks had large coaxiality deviation between the hole and the outer circle, which damaged the thread of the cartridge valve during assembly. The customer requested him to replenish half of the hydraulic valve blocks within 15 days, but the original manufacturer of the hydraulic valve blocks had to surrender. Although the lathe processing parameters were adjusted, and even the hydraulic valve block materials were changed, the hole position drift could not be solved, that is, the coaxiality deviation between the hole and the outer circle was large. Jone consulted more than 20 hydraulic valve block manufacturers before and after. Most of the manufacturers said that they could not completely avoid the drift generated during the drilling process of the hydraulic valve blocks, which could only be controlled between 1-2‰, but the customer's requirements could not be higher than 1‰. A week had passed, and Jone was still unable to give a plan for the aftermath, and his boss was not satisfied.

Jone, introduced by his friend Blake, who is also my old customer, sent me an email. According to his hydraulic valve block drawings and the layout of the holes, I told him that during deep hole drilling, there would be symmetry errors between the two cutting edges of the drill bit, or the sharpness of the drill bit would be inconsistent after wear, which would cause the hole position to drift. Under normal circumstances, for example, it is difficult to control the 100mm drift value at 0.1mm, that is, the error of 1 ‰. There are really not many hydraulic valve block manufacturers who can meet his customer’s requirement standard. Even if the hole is reamed after drilling, the hole position drift caused by drilling cannot be corrected. However, 3 years ago, AAK did not adopt this traditional processing method and matured the new processing technology. Jone asked me to help replenish the goods directly. The customer had no time to wait for the samples.

Three weeks later, AAK sent a replenishment of 100 hydraulic valve blocks and told Jone not to worry about the problem of hole drift that the original manufacturer could not solve. AAK hydraulic valve block is processed by using the outer circle to adapt to the inner hole, which is not only less than 1 ‰ of the error, but also has no deviation in the coaxiality between the hole and the outer circle. Here is how our workshop processes it:

(1) Blanking, with a total length allowance of 2mm.

(2) Lathing the left end face to be shiny, rough lathing the outer circle to be φ 35.5mm.

(3) Clamp the rough turned excircle at the left end and finish turning the right end face to ensure a total length of 80 ± 0.05 mm. Drill and ream φ 4.9 ± 0.05 mm through hole.

(4) Deburr the holes at both ends, and process φ 4.9 ± 0.05 mm holes at the two sharp tips, fine turning φ 34.9 mm outer circle.

(5) With φ 34.9 mm excircle as the benchmark to process other dimensions.

With φ 4.9 ± 0.05 mm holes machined first, and then φ 4.9 ± 0.05 mm hole is used as the benchmark to process the remaining dimensions of the hydraulic valve block so that the drift error in the processing of φ4.9 ± 0.05 mm hole was corrected in the subsequent processing, and the coaxiality between the hole and the outer circle of the hydraulic valve block was also guaranteed.

AAK hydraulic valve block valve hole, no hole drift, high coaxiality precision, you can also have a small try!

My friend recommended me to read a book. The title of the book is “courage to be hated”. It is said that it has dominated the first place in the sales list of Japanese books for 300 consecutive days. It's a set of great life philosophy: I have courage, so I'm not afraid of being hated. After reading it, I repeated it for a while. It's very interesting. Being hated may not be necessarily a bad thing. I was wondering, what would happen if a hydraulic valve manufacturer was also hated by its peers?

Some people say that being hated by others may also be a fortune. It is a very interesting point of view.

Last month, an Indian hydraulic valve customer privately said that a very strong hydraulic valve manufacturer in Ningbo hated AAK hydraulic valves. I was a little confused at that time. After reading the book "the courage to be hated", I was a little relieved. I think the other way around. A strong hydraulic valve peer especially hates AAK hydraulic valve, which actually sends a signal to AAK hydraulic valve. AAK must have something that he doesn't have, but he wants something. Therefore, I would like to thank this strong hydraulic valve peer. It is the peer's disgusting expression that helps AAK identify its own advantages. In fact, this peer also makes endorsement for AAK at the customer. Think so, why not be relieved?

I think human nature is usually like this, because he has done something I can't do, he has something I can't have, and this kind of thing also damages my sense of security, so I hate him. If others hate me, I need to ask myself, why do others hate me? This question seems very difficult to answer because you don't know the starting point of others. If you send it to yourself, you may find the answer quickly. For example, why do I hate someone? For example, a person always likes to show off his wealth, always exaggerates, always flatters the leaders, and so on. These are all things I secretly want to have, but they are difficult to do. Because of this, my sense of security has been damaged, so I hate him.

In AAK hydraulic valve, what have we done to annoy our peers?

1. AAK hydraulic valve dares to announce the chaos in the hydraulic valve industry, pointing out the problems existing in the hydraulic valve industry and the pain points existing in the hydraulic valve industry.

2. AAK hydraulic valve adheres to the manufacturing quality, focuses on the process innovation of hydraulic valves, and pays attention to the research and development of new types, new functions and high service life of hydraulic valves.

3. AAK hydraulic valve is promoted on the Internet every day. It says something that peers have not said or can not say every day, and also helps customers solve the difficult problems encountered on hydraulic valves.

In any case, whether the peers hate it or like it, AAK hydraulic valve only adheres to the right path, and then works hard, occasionally looking up at the sky. I know that those who are good at chess have no good skills. Take a road few people take and do something difficult and right. All the difficult things will become simpler, and the simple things will become more and more difficult.

The difficult road is never crowded. AAK hydraulic valve is always walking to the customers who are fastidious.

Giacomo from Italy, an old customer of AAK, has been purchasing hydraulic cartridge valves smoothly in recent years. At the beginning of last year, he told me privately that he was a little annoyed recently. The hydraulic needle valves he purchased at the beginning of last year was not corrosion-resistant enough, resulting in a claim for their equipment, the four column hydraulic press. The boss has criticized him 3 times. This hydraulic press is used in a chemical plant. After a few months, the system pressure is abnormal. After disassembling the hydraulic needle valve, it was found that the valve body was severely corroded, and the wear was even more serious. The customer requests to replace the hydraulic needle valves immediately and compensate for the delay cost. The original manufacturer is also willing to replace the hydraulic needle valves, but he can only ensure the corrosion resistance for 6 months. Moreover, this batch of hydraulic needle valves is non-standard, and it takes 2 months to reproduce, so Giacomo is not in a good mood because the hydraulic needle valve manufacturer can not solve the problem completely.

I gave our engineers the drawings and working conditions of this hydraulic needle valve. Coincidentally, this hydraulic needle valve is similar to the one ordered by a Dutch customer just 1 month ago, they are both a component of chemical hydraulic equipment. The only change needed is the size of the throttle port. The next day, I replied to Giacomo that AAK would send 40 hydraulic needle valves in 2 weeks to solve the urgent needs.

Last week, Giacomo sent an e-mail to inform us that AAK hydraulic needle valves had been used, and the equipment had operated for 9 months without any abnormality. The hydraulic needle valves had no corrosion. The customer was very satisfied and his boss was even more satisfied that they had saved a sum of work delay costs. Giacomo admires that AAK hydraulic needle valves are not only delivered 4 times faster than the original manufacturer, but also has a service life of more than 2 times. Giacomo also told me that because of his performance of solving problems quickly this time, the boss also looked at him differently, paid more and more attention to him, and his good mood came back.

AAK hydraulic needle valve has 3 advantages in the chemical industry, and the second manufacturer can not be found in Ningbo.

1. Hastelloy steel imported from the United States, as the preferred material for the valve body of hydraulic needle valves, is suitable for most corrosive media, with super corrosion resistance and wear resistance.

2. AAK hydraulic valve has a large amount of data storage and many existing programs. With UG/SOLIDWORK software, the process data of hydraulic needle valves can be configured in 2 hours, which is 3-6 times faster than that of other hydraulic valve manufacturers. AAK is equipped with Swiss advanced machine tools and its own modified fixtures, which not only has fast production speed, but also avoids human errors.

3. The customer selects AAK hydraulic needle valves for their chemical equipment, and has supplied 2 world top 500 chemical enterprises.

AAK hydraulic needle valve, the delivery is 4 times faster than peers, but its service life is more than 2 times. You can also give it a try!

Leo from Germany, who had been successful in the purchase of hydraulic valves, recently lost confidence in an order for hydraulic relief valves. During the test phase, when the pressure of the hydraulic relief valve sample is below 250bar, the system operates normally. Once it exceeds 250bar, the hydraulic relief valve will leak oil and the pressure will be unstable. After several debugging by their professional technicians, the oil will still leak when the pressure is high. After disassembling the hydraulic relief valves, no abnormality was found, but the O-ring was slightly scratched or the position was slightly offset, which may be the cause of oil leakage. The original hydraulic pressure relief valve manufacturer said that the O-ring material is synthetic rubber with the best anti-aging and oil resistance. It is the most suitable medium for this working condition. The assembly is also completed by 5 years of skilled workers. More new samples of hydraulic relief valves were tested, but they still leaks when the pressure is high.

Leo believes that the O-ring seal of the hydraulic relief valve is improperly assembled, so it is urgent to find a reliable hydraulic relief valve manufacturer to re-produce it, otherwise there is a risk of shipping by air. Leo contacted more than 10 factories in 3 days, but none of them guaranteed that the sealing ring will be 100% free of displacement and scratches after assembly. The customer has been pushing for the progress of the approval samples, but Leo hasn't even determined the manufacturer. How can he take it easy?

Leo started to look for new hydraulic relief valve manufacturers on Google, and noticed AAK hydraulic valve. He left a message to us: how should the synthetic rubber O-ring be assembled to make sure that there is no displacement or scratch? At the same time, it needs to make sure that when the pressure is above 250bar, the hydraulic relief valve does not leak oil, and the pressure is still stable. I told him that the disadvantage of the synthetic rubber sealing ring is that it is easy to deform under strong force, and not installed in place. As soon as the pressure is high, it will leak oil. Leo immediately sent the drawing of the hydraulic relief valve to AAK to make samples. Because we have the existing procedures for this hydraulic relief valve, 7 days later, the samples of the hydraulic relief valve were sent. 2 weeks later, Leo told me that AAK hydraulic relief valve had no oil leakage when it was pressurized to 300bar and tested continuously for 3 days.

Most of hydraulic relief valve manufacturers install the sealing ring by directly pressing it with clamps. AAK suffered similar complaints 5 years ago. We have been skilled in and improved the installation process of O-ring 3 years ago. Apply lubricant to the long shaft of the valve first to ensure that the O-ring slides without resistance. When passes through the external thread, we will use the metal guide sleeve to guide it into the O-ring groove instead of forcing it in. After the O-ring is put into the groove and the O-ring is restored to 100%, check the gap to ensure that there is no displacement or scratch, and then install it into the valve body. When it is installed in the valve body, it should also be coated with lubricant to rotate and insert slowly, and the O-ring will not be affected.

Yesterday, Leo sent a photo of him in the bar and told me that this was the most relaxing time in the past month for him.

AAK hydraulic relief valve, O-ring is assembled with unique skills, no oil leakage, you can also have a small try!

Connor is from a Canadian agricultural machinery equipment company, mainly responsible for purchasing hydraulic components. In the second half of last year, the sales of one of their rotary tillers were poor. Users reported that the equipment was insensitive and inefficient, and the fuel consumption was 10% higher than that of the same type of equipment. The boss realized that there were hidden dangers in the hydraulic manifolds and asked the engineers to check the causes. However, more than 1 month had passed and there was no practicable plan. The boss was worried and asked Connor to contact the original hydraulic manifold manufacturer to see if they could provide technical support, but they were only good at producing hydraulic manifolds according to the drawings. Connor also asked all his manufacturers of hydraulic components, but none of them gave a plan. When Connor reported these to his boss, he could only helplessly look at his boss shaking his head.

Connor browsed AAK website, saw the display and introduction of hydraulic manifolds, and left a message: what is the relationship between hydraulic equipment with high energy consumption and slow response and hydraulic manifolds? I understood that Connor had a problem with hydraulic manifolds, but it was difficult to answer. After several communications, I learned that his boss was worried, and Connor wanted to solve the problem that had plagued his company for nearly 3 months.

According to the hydraulic manifold drawings and the video of rotary tiller work sent by Connor, AAK engineers had discussion. The probability was that the hydraulic manifold design had hidden problems. From the analysis of hydraulic manifold and system schematic diagram, there were certain energy conflicts between the design of some oil circuits and the selection of hydraulic valves. AAK could redesign the hydraulic manifold to match their equipment. Connor also readily paid the development cost. 1 month later, AAK sent the hydraulic manifold samples. 2 months later, Connor said that after their rotary tiller was installed with AAK hydraulic manifolds, it was responsive during operation. The operation was more than 20% higher than before, and the fuel consumption was also reduced by 20%. The customer feedback was good, and more and more customers came to try it out.

Connor told me privately that he had seen his boss's long lost smile. The boss paid more and more attention to him. He will be promoted to the management next month.

AAK hydraulic manifold has 3 advantages, and there may not be a second one in Ningbo.

1. AAK engineers have experience in hydraulic manifold design, especially in oil circuit design. Ensure flow distribution as required, eliminate bypass throttling loss and reduce energy loss. The sensitive oil circuit control makes the equipment easy to control, sensitive and efficient.

2. Hydraulic manifold material selection and proportioning. The material selection of each component from the valve block to the valve is based on the working conditions. The selection and allocation of all valves in the manifolds must comply with the energy principle under the condition that the system principle is met, without robbing energy or wasting energy. Without more than 10 years' experience in hydraulic manifolds, it is difficult to master its essence.

3. We make good use of MDTools software to design hydraulic manifolds. From circuit logic to the functionality of each valve, we can do personalized design and customized production of non-standard hydraulic manifolds.

AAK hydraulic manifold makes the equipment flexible, energy-saving and efficient. You can also have a try!

Chernychevsky is from a Russian company specializing in medical hydraulic equipment. Last week, I received an urgent order from him, urgently needing 30 hydraulic pilot operated relief valves. He specially noted that the quality of the hydraulic relief valves should be the same as that of the samples at the end of last year. I was a little surprised because the hydraulic relief valve had no news after the sample was sent last year. Today, it is an urgent order and the quantity is small. Chernychevsky may have realized my surprise. He also frankly told me that besides AAK, another hydraulic relief valve manufacturer also made the samples last year. In the sample stage, both samples passed the test, but the price of AAK hydraulic relief valve was 30% higher, so AAK was not selected. But after receiving the mass production of hydraulic pilot operated relief valve, the trouble began.

At the equipment assembly stage, it was found that the precision of the hydraulic pilot operated relief valve was not up to standard, so he had to sort the hydraulic relief valves and install it again. 6 months ago, there were several complaints about inaccurate positioning or weak lifting of the hydraulic lifting system of the equipment. According to the original hydraulic relief valve manufacturer, the hole accuracy of this hydraulic relief valve is IT7 ~ 4. This tolerance requirement makes it difficult to ensure that each hydraulic relief valve has no error and can only be replaced those ones. But after 3 months, the hydraulic pilot operated relief valve still leaked. After the boss knew it, he criticized his hasty purchasing behavior and was very disappointed with him.

Chernychevsky realized the seriousness of the problem and could only replace with AAK hydraulic relief valves, because he had cooperated with AAK for 3 years and had never been complained. He regretted not choosing AAK hydraulic valve for the sake of 30% price difference. After the 30 samples of AAK were sent, he privately told me that he would no longer worry about the boss' looks. He was in a good mood and relaxed.

AAK hydraulic relief valve is 100% qualified with high precision. It depends on the following 3 points, which few factories can achieve:

1. The imported precision honing machine is operated by a specially assigned person to ensure the precision machining of the hydraulic pilot operated relief valve hole. After honing, the accuracy of the hydraulic relief valve hole is IT7 ~ 4, and the surface roughness can reach Ra0.32 ~ 0.04 μM.

2. After processing, the Mahr cylindricity meter imported from Germany is used to accurately measure each part through EasyForm software to obtain the measurement results. At the same time, the workpiece can be quickly adjusted and aligned to improve the measurement efficiency. Ensure the concentricity of each hydraulic pilot operated relief valve is 100% consistent.

3. After installation, pressure test should be conducted for each valve before packaging. During the whole manufacturing process, the process should be strictly followed and the details should be carefully checked to ensure that each hydraulic pilot operated relief valve is qualified before shipment.

AAK hydraulic pilot operated relief valve, you can rest assured of accuracy, and have a small try!

Patrick is the purchasing manager of a hydraulic equipment company in Italy. At the beginning of last year, they sold a batch of shield machines to Portugal, which were complained by customers within half a year. During the operation of the shield machine, the grease pump at the tail of the shield had no pressure. It was found that there was leakage in the hydraulic counterbalance valve of the shield machine. After disassembly, it was found that the fitting clearance between spool and valve hole of hydraulic counterbalance valve was worn. The original hydraulic counterbalance valve manufacturer said that the wear of hydraulic counterbalance valve was caused by the construction environment and pressure requirements of shield machine, and the valve spool of hydraulic counterbalance valve was made of 12L14 steel imported from the United States with good wear resistance, which means there is nothing else he can do. Patrick was helpless, and his engineers were not happy that he found such an irresponsible hydraulic counterbalance valve manufacturer, requiring him to find a manufacturer that has hydraulic counterbalance valves with a service life of more than 2 million times.

Patrick contacted more than 20 hydraulic counterbalance valve manufacturers, and AAK also received his drawings. Combined with the working condition information, if the service life of this hydraulic counterbalance valve needs to be more than 2 million times, material selection, processing accuracy, durability testing, these 3 aspects are indispensable. We told Patrick that we could test the sample directly. If the sample failed, we were willing to return the development cost. 2 weeks later, Patrick paid $600 for the development and informed that 3 hydraulic counterbalance valve manufacturers were testing samples at the same time. He would only choose 1 manufacturer as their sole supplier of this hydraulic counterbalance valve.

After 45 days, we sent the samples of hydraulic counterbalance valve. 2 months later, Patrick wanted to order 500 hydraulic counterbalance valves at one time. After more than half a year of comparison, AAK hydraulic counterbalance valve was the only one that passed the durability test of 2 million times. His boss was also very happy to find such a manufacturer. Patrick wanted to know how AAK hydraulic counterbalance valve did in terms of material selection, processing accuracy and durability test?

By doing 3 points, AAK differs from the peers, but also declares that there are no peers for hydraulic counterbalance valve with a service life of 2 million times.

1. AAK adopts 20CrNi2MoV high carburized bearing steel imported from Germany. Combined with carburizing pretreatment process, through secondary quenching + cryogenic treatment + low temperature tempering process, it is cooled to 650 ~ 700 ℃ and put into the furnace. After cooling to 450 ~ 500 ℃, it is discharged from the furnace. The microhardness can reach 237 ~ 247 HV, and its wear resistance and fatigue resistance are improved by more than 3 times.

2. The precision honing machine imported from the United States, equipped with diamond reamers, grinds 20CrNi2MoV steel. The grinding is complete and traceless, providing a good guarantee for finishing.

3. The hydraulic counterbalance valve durability test equipment independently developed by AAK meets the NFPA/T2.6.1 standard. It will be warehoused after 2 million times of fatigue test.

AAK hydraulic counterbalance valve, German materials, American equipment, more than 2 million times of performance, you can also have a small try!

I always remember an unusual inquiry email about hydraulic relief valve from Ellenburger, a Russian customer, at the beginning of this year. The email subject was "Don't reply if without ability and confidence", he should have been in trouble at other manufacturers. The content of the email was about testing 20 hydraulic relief valves, with detailed part processing drawings and parameter requirements attached. That was a hydraulic relief valve with high requirements, and the accuracy of valve hole is required to be within 2μM, the material hardness of the valve spool is HRC68, and the surface of the valve body is galvanized nickel alloy, which must withstand high pressure of 450bar. In addition, the durability test of the hydraulic relief valve must pass 2 million times. The requirements in terms of manufacturing quality, function and performance for this hydraulic relief valve is all clearly indicated.

After more than 3 hours of discussion by AAK engineers, I replied to Ellenburger that AAK was able to produce this hydraulic relief valve at a development cost of 2,500 US dollars. After the email was sent, there was no reply, and I didn't follow up. Because I believe there are few manufacturers who can make this hydraulic relief valve. For example, in Ningbo, the "hometown of hydraulic valves in China", perhaps only 3 factories have this technical ability.

3 months later, Ellenburger suddenly asked our bank account number. He wanted to pay us to sample the hydraulic relief valve. I was also a little confused. After several rounds of communication, it was learned that the hydraulic relief valve had been developed for half a year, he found more than 20 manufacturers, communicated with more than 300 emails in total, and paid the development cost for 3 times, but all failed, and his mood was extremely bad.

Ellenburger said that when he saw AAK reply that we can produce this hydraulic relief valve, his first feeling was that the manufacturer who responded so quickly should not be very good, so he ignored us. He thought that AAK would certainly follow up by email within a week, but to his surprise, AAK didn't send any email for a month, so he began to pay attention to AAK hydraulic valve slowly. In AAK website, he saw the stories between AAK and many customers, and some cases made him admire AAK very much, therefore, he believes that AAK is the ideal manufacturer of his samples this time. I was also moved by him and promised him that if AAK sample failed, I would be willing to return the development fee. At the same time, I also reminded him that if AAK could not get the hydraulic relief valve done successfully, there was no need to find other hydraulic relief valve manufacturers in Ningbo.

After 45 days, 20 samples of hydraulic relief valves were sent after passing the internal test. Last week, Ellenburger informed us by email that AAK hydraulic relief valve samples passed the test, and each parameter met the requirements. Although 2 million performance tests have not yet yielded results, he believes there will be no problem, because from the test process, the hydraulic relief valve samples of the other 3 factories are not at the same level as AAK's.

For the hydraulic relief valve with high requirements, AAK 3 major advantages are admirable to Ellenburger, and I believe most customers can't achieve it.

1. AAK selects 100Cr2 bearing steel and adopts carbonitriding heat treatment process. It is infiltrated for 13 hours at a high temperature of 820-830 degrees, then oil quenched, cryogenic treatment from -60 degrees to -70 degrees, and tempering treatment from +150 degrees to +160 degrees. The hardness is guaranteed to be HRC68 or above. Wear resistance, high pressure resistance and durability have a good foundation.

2. AAK hydraulic relief valve uses ultra-high hardness diamond reamers for valve hole processing, especially good at hard material grinding, complete grinding, no trace. The accuracy of valve hole is guaranteed to be within 1-2μm, the surface roughness reaches Ra0.2-0.3, and the coaxial accuracy data is unified.

3.AAK has experienced technicians who have been in the factory for more than 12 years and have 30 years of industry experience. There are specially assigned personnel and special machines, and the operation is flawless.

AAK hydraulic relief valve, produced with American materials, Swiss equipment, German knives, and by 30-year technicians, you can also have a small try!

As the manager of AAK Hydraulic Valve, I have 5 cards in my hand, which are time, protection, encouragement, reward and punishment. Most of the time, the quality of the card is not important, the player is the core. What a bad hand is also a card. Maybe there is no "smash a good hand", because the biggest card in a hand is the player.

The first card is time. Time can only be given to growers. In the first year of our factory construction, an apprentice came. His qualification was average, but his attitude was very good. Once the blank was bad, he said, give me more time, and I will do better. Half a year later, he was one of the best lathe workers who entered the factory in the same period.

The 2 most common dimensions of people are attitude and ability. If I can only choose one, I choose "attitude". Because attitude can make a person take the initiative, have the space to cultivate and have the potential to grow. As long as one person is willing to grow, it is worth giving him time. In AAK Hydraulic Valve, I'm not worried about your ability. I'm only worried about your growth. Giving time to a lazy person who feels good about himself is a wrong deal.

The second card is protection. Protecting card can only be given to innovators. The innovation of AAK Hydraulic Valve needs to try and break through. It is inevitable to make mistakes. The protection at this time, is to protect the enthusiasm for innovation, and the possible innovation results. At the beginning of last year, a non-standard high-precision hydraulic valve from a German customer was developed at AAK, our chief engineer fell ill, and this job was temporarily transferred to Engineer Chen. He didn't go home for a week. He stayed in the factory to follow up all the processes, including design, technical transformation, computer operation and testing. Despite several technical improvements, one parameter still failed to meet the standard. Although the customer canceled the trial order, AAK did not criticize and encouraged him to continue the technical transformation, and the cost was paid from the financial expenses. 3 months later, the second sample was sent to the German customer at our cost. The customer not only confirmed all the parameters, but also marveled that AAK Hydraulic Valve did not give up the technical transformation.

Whether it's technological transformation or innovation, it's actually not difficult . The most important thing is persistence. Many people find it difficult when they encounter problems, but if they don't try and dare not break through, how about innovation. It is the cornerstone of the development of AAK Hydraulic Valve to protect people who are willing to try innovation and can persevere.

The third card is encouragement. Encouragement should be given to those who work hard. When the technicians of AAK Hydraulic Valve encounter technical problems, they can stay at the factory for a week in order to solve problems for customer as quickly as possible. Take a sleeping bag and sleep in the meeting room. In production, it is common for the workshop director not to go home for a week in case of emergencies. Last month, due to the epidemic, a batch of raw materials from Shanghai were not in place in time, and the delivery time of customer order would be delayed by 2 weeks. After the materials were in place, director Wang of the workshop mobilized the technicians to improve the production progress by working in two shifts of 12 hours. He was on duty for 24 hours and dozed off in the workshop for 2 hours when sleepy and worked hard for a week. Although it was still 3 days late, everyone was affirmed, encouraged and had an extra 2-day holiday at the production meeting of AAK Hydraulic Valve at the end of the month.

If possible, it's good for you to work harder. People who spend 100% or even 120% of their efforts to do something deserve to be encouraged.

The fourth card is a reward, which can only be given to the producer. Applaud for hard work and pay for contribution. AAK Hydraulic Valve is ability oriented, performance oriented and output oriented, and rewards the producers. I told AAK Hydraulic Salve staff that you don't have to think about whether you want to report today or whether you want to have an extra meal with me tomorrow. I don't care. I am more concerned about your performance and output. The reward card can only be given to those who have output. In the second half of the year before last, technician Xiao Wang successfully developed a hydraulic valve, which helped AAK successfully signed a strategic cooperation agreement with a Russian customer, the sales performance in the Russian market doubled year-on-year. At the annual meeting last year, I gave Xiao Wang 25% of the sales profit of this customer. Many colleagues were not surprised at all, because AAK only rewarded those who contributed.

The fifth card is punishment. Punishment should be given to violators. Those who violate the values of the process system should be punished. Hydraulic valve manufacturers without punishment will lose the bottom line and principles. We must punish when we should. Especially in the usual output assessment, we should look at two things at the same time: 1. Has the goal been achieved? 2. By what method? The first point is to look at ability and output. The second point is to look at the system and values. If someone violates the system and values, even if the result is good, he should be punished.

We have a sales Linda, who is mainly responsible for the Asian market. Her performance goal last year was not only achieved, but also increased by 50%. From the data, it is a good thing. However, as soon as the finance department checked, it was found that her quotation did not comply with the financial regulations. For example, two customers in India were gave different prices for the same purchase demand. Some large quantities of hydraulic valves are quoted to trade orders at the expense of the company's profits. I interviewed her and transferred her to another position. She is no longer in charge of sales.

AAK hydraulic valve gives growers time. Protect innovators. Give encouragement to those who work hard. Reward the producers. Punish the violator.

Pasternak is the purchasing manager of a Russian hydraulic equipment company. The hydraulic equipment they sold 2 years ago could not be disassembled after 1 year and was requested for after-sales service. During the annual maintenance, it was found that the relief valve hole on the hydraulic manifold was blocked, but the valve was just installed under the motor, and the clearance was less than 3cm. It was difficult to disassemble, so they had to contact the equipment supplier and complained about the improper design of the hydraulic manifold, also unwilling to pay maintenance fees. The after-sales engineer spent 2 weeks to complete the cleaning of the whole hydraulic manifold. Pasternak thought of a customer complainted last month that the hydraulic system pressure was abnormal, but the hydraulic components were normal after inspection. Pasternak realized that there may be problems in the design of hydraulic manifold. If it is not solved, there will be more and more complaints later, and the unlucky one is still him. The original hydraulic manifold manufacturer was not sure where the design deviation was. Pasternak asked more than 10 hydraulic manifold manufacturers, and there was no substantive feedback.

Pasternak saw an article about hydraulic manifold of AAK on B2B: Innovative hydraulic manifold design and manufacturing, AAK has no rival in use and maintenance. He sent an email directly to AAK and provided their system schematic diagram and hydraulic manifold design drawings. After analysis, AAK engineers found that the problem really lies in the design of hydraulic manifold. The reasons are as follows: the design of the oil passage direction increases the volume of the valve block, and also causes the loss of oil circuit pressure pipe. At the same time, the selection of hydraulic valves and their installation position on the hydraulic manifold are not optimal. We can redesign the hydraulic manifold and test samples to ensure that the system pressure is stable and the maintenance is simple and convenient.

Pasternak realized that perhaps only AAK could help him and paid $2,000 for the development. 1 month later, AAK sent 3 hydraulic manifold samples. 2 weeks later, Pasternak said that the size of AAK hydraulic manifold has been reduced, the installation is convenient, and the hydraulic manifold function is not affected. Last week, Pasternak sent a new inquiry about hydraulic manifold and told me that there had been no customer complaints about unstable pressure in AAK hydraulic manifold samples. Now as long as it was an inquiry about hydraulic manifold, he would email me at the first time. AAK hydraulic manifold is not only smaller than the original design, but also convenient to install, which solves the problem that plagued Pasternak for more than 2 years. There are no complaints in use and maintenance. The customer is satisfied and the boss is happy.

Do not be even a little careless in hydraulic manifold design. We first need to determine the selection of components on the hydraulic manifold according to the hydraulic schematic diagram, and draw the sub schematic diagram and three-dimensional model corresponding to the valve block. Secondly, according to the requirements of hydraulic manifold pipe laying, make the overall layout of each component, determine the optimal positions of oil inlet, working port, oil return port, external leakage and external control port, prevent the installation of more than 3 surfaces, especially under the valve block, and determine the size of the valve block according to the maximum overall dimension of the valve preliminarily. Finally, the oil passage on the valve block is designed according to the size and positioning size of the oil port on each valve, so that the internal oil passage is optimally arranged and the pressure loss of the oil passage is minimized.

Pasternak told me privately that he would be promoted to purchasing director next month.

AAK hydraulic manifold, innovative hydraulic manifold design and manufacturing, AAK has no rival in use and maintenance, you can also have a small try!

AAK hydraulic pressure control valve has conquered Samuel with 2 million times performance, within 3μm accuracy and 1500H corrosion resistance, with 3 these high differences, winning back the order from Samuel's 5-year old supplier. At the same time, we have also reached a strategic cooperation on hydraulic valves and long-term supply of supporting hydraulic components.

Samuel is from a hydraulic equipment company in Italy, and he didn't have much cooperation with AAK in the early stage. At the beginning of the year, they developed a hydraulic cylinder for the solar thermal power generation system in Dubai, and needed to purchase hydraulic pressure control valves. Samuel chose an old supplier who has cooperated for more than 5 years. After 45 days, the hydraulic pressure control valve samples were tested, and it was found that the flow control was unstable. Red rust appeared after more than 500 hours of salt spray test, while Samuel required at least 1,500 hours to adapt to the desert environment of Dubai. The hydraulic pressure control valve manufacturer said that the accuracy is up to standard, and the unstable flow is related to the design. At the same time, the hydraulic pressure control valve adopts the surface treatment of white zinc plating, and the salt spray test should not fail. Samuel was unhappy and had to start looking for a new hydraulic pressure control valve manufacturer.

Samuel asked more than 10 manufacturers, but none of them had confidence in the hydraulic control valve with 2 million times of performance used in the desert environment of Dubai. He began to worry at this time, as can be seen from his email to me. He said in his email: I know that AAK has hydraulic flow control valves that are not afraid of high temperature and have been sold to the Middle East, as well as hydraulic counterbalance valves that have not been corroded after a year of sandstorm. I have a hydraulic pressure control valve used in Dubai. No manufacturer is willing to take over. Can AAK make a hydraulic pressure control valve with 2 million times performance used in Dubai? After communication, I learned that the manufacturer he had worked with for 5 years surrendered, and other manufacturers had no intention of accepting orders. I told him that in order to make hydraulic pressure control valve with 2 million times performance used in Dubai, the corrosion resistance of the valve surface must be solved first. Samuel may realize that I have hit the point of the problem, and immediately sent me drawings and other information.

Our engineer partially optimized Samuel's original design of hydraulic pressure control valve and told him that for hydraulic pressure control valve with 2 million times performance, within 3μm accuracy and 1,500H corrosion resistance, if the sample of AAK also fails, there is no need to try other hydraulic valve manufacturers in Ningbo, he can just wait for our samples. 45 days later, AAK sent 30 hydraulic pressure control valves. 2 months later, that is, last week, Samuel informed that all the 3 performances of AAK hydraulic pressure control valves had reached the standard, and it was also the only manufacturer that reached the standard. Their team was very happy. Samuel cancelled the PO with the 5 years old supplier and transferred it to AAK. At the same time, we have reached a strategic cooperation on hydraulic valves and long-term supply of supporting hydraulic components.

AAK hydraulic pressure control valve can be outstanding with 3 high from peers, which depends on 3 important cornerstones:

1. AAK technical team, adhering to innovation and technical transformation, changed the design for 6 times, and finally determined the optimal design of the inlet and outlet of the hydraulic pressure control valve, that is, the optimal hydraulic control ratio. By means of diversion, the relative balance of the pressure on both sides is adjusted to ensure the smooth operation of the equipment.

2. AAK hydraulic pressure control valve adopts zinc nickel alloy coating, the nickel content is more than 13%, and the corrosion resistance is increased by more than 10 times. Most manufacturers are unwilling to spend this high cost, and also not able to control this special coating process.

3. AAK has produced ODM hydraulic valves for 3 of the world's top 500 for 10 years, and the performance is benchmarked with the international first-line hydraulic valve brands.

AAK hydraulic pressure control valve, performance, accuracy, salt spray test, no accident, welcome to have a try!

Andy is one of our old customers of hydraulic valves in Germany. He purchases hydraulic cartridge valves from AAK all year round. Recently, he suddenly asked me some technical parameters of hydraulic valve blocks. I was a little surprised. After further communication, I learned that he started to purchase hydraulic valve blocks for the first time last year, but failed. Andy purchased a batch of hydraulic valve blocks from a manufacturer who just produced hydraulic valves for him in the past. Maybe this manufacturer didn't know enough about the hydraulic valve blocks. After 100 hydraulic valve blocks arrived, there was a problem after sales. According to the user's feedback, the pressure of the hydraulic valve blocks could not meet the system requirements, and the pressure was also unstable. Most hydraulic valve blocks were required to be returned. The manufacturer also said that these hydraulic valve blocks had been tested before leaving the factory. Now these hydraulic valve blocks are stacked in the warehouse. Andy regretted it so much that he was sad all day long.

According to the hydraulic valve block drawings, sample photos, and videos provided by Andy, I told him that the processing accuracy of the hydraulic valve block should still be flawed. Although the original manufacturer also did the pressure test, he may not understand that there are 3 types of hydraulic valve block pressure tests, or even he just completed the pressure test on the pressure test bench. This is a common problem in pressure test of most hydraulic valve block manufacturers, but AAK never tests pressure like this.

2 weeks later, I sent 10 samples of hydraulic valve blocks according to his drawings. About 2 weeks later, Andy advised that when AAK hydraulic valve block was installed, the pressure parameters were consistent with the system requirements, and it was smoother and had more stable pressure debugging than that of the original manufacturer. Users liked it very much. Andy disposed of the hydraulic valve blocks in the warehouse and asked us to replenish 100 pieces as soon as possible to fill the inventory.

I told Andy that the processing of AAK hydraulic valve blocks will not be falsified in terms of accuracy first and finally in the pressure test stage of hydraulic valve blocks will not be sloppy. The pressure test is carried out directly in the hydraulic system, which is more consistent with the operating conditions than the test on the pressure test bench. At the same time, the test pressure is determined according to the working pressure of the system. However, most manufacturers cannot directly test the hydraulic valve block in the hydraulic system, and directly use the traditional process to test on the pressure test bench.

The pressure test of AAK hydraulic valve block is divided into 3 types of standards. Peers may not be able to master the 3 types of methods, and blindly use the test pressure of 1.5 times the working pressure to test whether the pressure of the hydraulic valve block is stable or not. We classify it in this way: for working pressure less than 16MPa, the test pressure is 1.5 times of the working pressure; for the working pressure of 16MPa~25MPa, the test pressure is 1.25 times of the working pressure; at the same time, for the working pressure of 25MPa~31.5MPa, the test pressure is 1.15 times of the working pressure. AAK uses 1.5 times, 1.25 times, 1.15 times to distinguish the only standard 1.5 times of its peers. This detail not only has demons, but also money. It depends on whether you can dig it out.

AAK hydraulic valve block, focus on details, more stable pressure, welcome to try.

Cristoforo is from an Italian hydraulic equipment company. At the beginning of last year, the hydraulic station they sold to South Africa was complained by the customer in less than half a year. The oil temperature in the hydraulic station was abnormal, as high as 80 ℃, and the efficiency of the whole hydraulic transmission was poor. The after sales service found that the hydraulic relief valve was stuck, which affected the load relief and caused the oil to heat up. The original hydraulic relief valve manufacturer believed that the jamming was caused by unclean hydraulic oil. After detecting the hydraulic oil, there was no abnormality. When disassembling the hydraulic relief valve, it was found that the contact surface between the valve spool and the valve hole was worn, which should be caused by the coaxiality deviation between the valve spool and the valve hole of hydraulic relief valve, resulting in the jamming. The original manufacturer agreed to replace it, but half a year later, the old problem happened again, and Cristoforo was criticized.

Cristoforo had to find manufacturers with long service life of hydraulic relief valves. He contacted many manufacturers and found that most of them were not able guarantee a service life of over 1 year for the hydraulic relief valves with a maximum flow of 240L and a pressure of 450bar, but only 6 months. Finally, only 3 manufacturers were willing to test samples, including AAK. AAK engineers determined that the material selection was a key step according to the parameter requirements of the hydraulic relief valve. After 2 months, 30 samples of hydraulic relief valve were sent out.

Last week, we received the PO of hydraulic relief valves from Cristoforo. He said that although AAK was the latest to deliver the samples, in the service life test, the hydraulic relief valve samples provided by the 3 manufacturers showed that only AAK had no abnormalities after a service life of more than 1 year. For this kind of customized, high demand and non-standard hydraulic relief valve, our 3 advantages are not available in most manufacturers in Ningbo.

1. The durability of hydraulic relief valve mainly depends on the material selection according to the working conditions. For this hydraulic relief valve, AAK selects 20CrNi2MoV high carburized bearing steel from Germany, combined with carburization pretreatment process, through secondary quenching + cryogenic treatment + low temperature tempering process, it is cooled to 650 ~ 700 ℃ and then discharged after being cooled to 450 ~ 500 ℃. The microhardness is 237 ~ 247 HV, and its wear resistance and contact fatigue performance are increased by more than 3 times. The heat treatment of this material is difficult to control, and most manufacturers cannot control it.

2. In terms of material selection of AAK hydraulic relief valve, there are full-time engineers who use Brinell hardness tester to compare and test various materials under the test conditions of 3000kg force and 10mm ball. Many manufacturers cannot do this kind of material selection method.

3. AAK has a precision honing machine, equipped with diamond reamers, to do a good job in finishing. After honing, the dimensional accuracy of the valve hole of the hydraulic relief valve is IT7 ~ 4, and the surface roughness can reach Ra 0.32 ~ 0.04 microns.

AAK hydraulic relief valve, high pressure, large flow, with a service life of more than 1 year, you can also have a small try!

Hannelore came from Demag hydraulic company in Germany and started to work in Shanghai branch at the beginning of the previous year. I don't have much contact with the Shanghai office. Frankly speaking, I'm not very good at dealing with these offices with Chinese people. These people are unprofessional and backseat drivers, they also need kickbacks. I hate kickbacks in business. In August last year, Hannelore asked whether AAK was willing to cooperate with them to develop a high-precision hydraulic pressure control valve, and attached the drawings and working condition requirements. After several rounds of email communication, I learned that they were in big trouble with this hydraulic pressure control valve, which made him irritable.

They have a hydraulic injection molding machine to be promoted at the exhibition in October. This high-precision hydraulic injection molding machine has very high requirements for the accuracy of its core components. The accuracy requirements for the hydraulic pressure control valve used have been strictly refined in 4 aspects. The boss asked Hannelore to find a manufacturer of hydraulic pressure control valves with high quality. After a round of inquiry, only two factories were willing to try samples, and the others said that the accuracy requirement was unbearable. Two months later, the samples from the two hydraulic pressure control valve manufacturers were tested. Unfortunately, there was still a deviation in the accuracy, but both manufacturer was unwilling to try again. In other words, his busy more than two months were in vain, and the boss was already very unhappy.

After analyzing the drawing of the hydraulic pressure control valve, AAK engineers found that the 4 accuracy requirements are more than twice that of the standard hydraulic pressure control valves. At the same time, the diameter of the blind hole in the valve body is only 5mm, but the depth needs to be 50mm long, it is very thin and extremely deep. During the processing process, the tool cannot pass through the hole completely, and the inner hole is easy to cause radial deformation, and the axial taper requirement is 1:45, and the ovality cannot be greater than 0.01mm, this accuracy is too difficult to control. No wonder all of those manufacturers have surrendered. After 3 days of study and research, AAK technical team informed that the samples of hydraulic pressure control valve could be sent after 40 days. Hannelore emailed me the bank slip of the development fee the next day, and stressed that AAK must find a way to deal with it, otherwise he was very afraid of the boss's outbreak.

Two weeks after the sample was sent, his email came. AAK hydraulic pressure control valve passed the accuracy test, and the test result on the machine was good. Their team was confident that it would sell well at the exhibition. After the exhibition ended in October, Hannelore placed the order for 1,000 hydraulic pressure control valves. Hannelore privately informed that the equipment had sold well, and the boss's cold look at him turned into a happy face. After 4 months of anxiety, he could finally relax.

The reason why we did what our peers all surrendered is that there are 3 points:

1. The production process of hydraulic pressure control valve is set up with ingenious tricks, including drilling, reaming, coarse reaming, fine reaming, hole cutting, and calibration, changing the speed, adjusting the accuracy coefficient, eliminating the bell mouth of blind hole and strictly control the surface roughness.

2. Use the Swiss high-precision machine tool and the bladed reamer to cut the hole, and the roughness of the blind hole reaches Ra value of 0.2-0.4 μm. The ovality circle error is 0.01-0.02mm, the taper error is 0.01-0.025mm, and the dimensional accuracy of the hole can be controlled within 1μm.

3. Before machining, the accuracy of each axis of the machine tool is tested, including positioning accuracy, repeated positioning accuracy and reverse positioning accuracy. After obtaining the test data, the accuracy is compensated. Most hydraulic valve manufacturers ignore this small detail.

AAK hydraulic pressure control valve, benchmarking the accuracy of international first-line brands, you can also have a small try!

Ilona is from a hydraulic equipment company in Turkey. At the beginning of last year, less than 3 months after joining the company, he needed to purchase a batch of hydraulic pressure reducing valves for their new hydraulic equipment. Ilona placed the order with an old supplier of hydraulic pressure reducing valves that has cooperated for 3 years. After 45 days, the equipment began to be installed and debugged, but the pressure supply of the equipment was unstable. The problem lies in the leakage of the hydraulic pressure reducing valves. The specific problem lies in the error between the angle of the cone in the valve sleeve and the requirements. The engineer asked Ilona to replace the hydraulic pressure reducing valves. The manufacturer of the hydraulic pressure reducing valves said that the error control was already the limit. Ilona contacted several other hydraulic cartridge valve manufacturers and didn't get a reply. He was very helpless.

Ilona noticed AAK hydraulic valve online and left a message on AAK website: Can AAK produce the hydraulic pressure reducing valves with the angle error of ± 0.8 ° of the cone in the valve sleeve? At that time, I felt that it was a customer with high quality, so I became interested. Ilona also sent the technical parameter requirements and drawings of the hydraulic pressure reducing valve. Our technical team was aware of the challenge of this hydraulic pressure reducing valve. The error of the cone angle in the valve sleeve needs to be controlled within ± 0.8 °, and the maximum axial grinding tolerance of the corresponding sealing circle is 7.5μm. These two precision requirements are difficult for most manufacturers to achieve, but our engineers are confident.

50 days later, AAK shipped the trial order of 30 hydraulic pressure reducing valve. Two weeks later, Ilona emailed that AAK hydraulic pressure reducing valve was installed on their hydraulic equipment. The problem of abnormal pressure supply had been solved and the equipment operated well. Their engineers told Ilona that the measurement error of the inner cone angle of AAK hydraulic pressure reducing valve was only 0.06 °, which was 30% higher than the standard, and the measurement error of the axial dimension of the sealing circle reached 2μm. It is 3 times higher than the standard. Their engineers wanted to know how AAK achieved it?

The reason why AAK hydraulic pressure reducing valves achieved what other hydraulic cartridge valve manufacturers can't, and the two error standards are increased by 30% and 3 times, is that AAK control the quality in 3 aspects: modeling, processing and detection, which most hydraulic cartridge valve manufacturers can't do.

1. Through the process analysis of the hydraulic pressure reducing valve, our engineers establish the manufacturing error model to control the change relationship between the internal cone angle error and the grinding amount, which is the core of doing a good job of error.

2. GILDEMEISTER turning milling compound machining center is adopted, which can compensate the errors caused by tool wear and other reasons during the machining process. At the same time, the double reading head c-axis position detection technology enables the positioning accuracy of c-axis to reach 5 angular seconds, so as to ensure the minimum error of the conical surface in the valve sleeve.

3. Then use the special 3 coordinate detection device to quickly measure the axial dimension of the sealing circle of the valve sleeve, so that the manufacturing error falls within the control range, and ensure that the inner cone angle and the axial dimension of the sealing circle of the hydraulic pressure reducing valve meet the standard.

AAK hydraulic pressure reducing valves, modeling, processing, testing, 3 checks for accuracy error, you can also have a small try!

In the field of industrial products, China has made rapid progress in recent years, with many proud scientific research achievements and patented technologies. In the hydraulic valve industry, Chinese hydraulic valve manufacturers have also begun to export, in these two years.

Each hydraulic valve manufacturer has its own engineers and its own R & D department. What is R & D? Many hydraulic valve manufacturers confuse the concepts of "scientific research" and "innovation". Generally speaking, "hydraulic valve scientific research" is to convert money into hydraulic valve knowledge, which is a department that spends money, while "hydraulic valve innovation" is to exchange knowledge for money and create wealth for enterprises. They cannot be confused. Some scientific research institutions have only completed "scientific research", but rarely completed "innovation". It is a pity that some hydraulic valve manufacturers in the world have invested a lot of money in research and development, but they are only immersed in theory and have not become innovative pioneers in the industry.

AAK Hydraulic Valve, "scientific research" and "innovation" are two teams with different offices, rather than the same office and the same team as most hydraulic valve manufacturers.

If scientific research achievements cannot be combined with practice to create value for all walks of life, these theoretical achievements are like empty promises. It is undeniable that at present, the gap between Chinese hydraulic valve manufacturers and international famous hydraulic valve manufacturers in terms of scientific research and technology needs generations of excellent hydraulic valve manufacturers to catch up, but AAK's most important thing is the innovation of hydraulic valves.

During walking, it's easy to forget the original intention. I often reflect on where AAK Hydraulic Valve focuses? The value of a manufacturing enterprise is not measured by the number of orders or output, but depends on its contribution to the industry. Just like a person, his fame or status is that the society has given you more trust and responsibility to promote social progress. Whether in the hydraulic valve industry or in society, try to be a person with feelings, temperature and style. How can it be satisfactory, but I want to be worthy of my heart. Make a supreme wish, enjoy a lower blessing, choose a high place to stand, and walk to a wide place.

Whether the manufacturing of hydraulic valves is difficult or not, AAK insists on traveling with innovation and dreams. Because we are lucky to catch up with the tide of development in the era of industrial products, appreciate the era and contribute to the industry.

AAK Hydraulic Valve, with innovation and dreams, is willing to walk with you together.

At the beginning of this year, Hedwig sent an email asking for an ultra-high precision hydraulic flow control valve, with drawings and working conditions attached. Hedwig comes from an Italian hydraulic equipment company and has been cooperating with AAK for some years. In the second half of last year, they planned to bid for a power unit for aviation hydraulic system but was blocked by the hydraulic flow control valve. The cylindricity of valve sleeve inner hole should be within 1μm, and the leakage during operation is absolutely not allowed to exceed the specified value.

Hedwig found a hydraulic flow control valve manufacturer in Italy to test the sample. 1 month later, the equipment was debugged, but the accuracy of inner hole of hydraulic flow control valve sleeve was not up to standard, and the leakage volume exceeded the specified 30%. Hedwig contacted several non-standard customized manufacturers, but the cylindricity of the inner hole could only be in the range of 2-3μm. After more than 2 months, no progress had been made, and all components were complete, except for the hydraulic flow control valve. The bidding time was coming, and the boss was very unhappy. Hedwig was under great pressure.

Hedwig thought of AAK, because only AAK met the requirements of the previous hydraulic valves with high accuracy. Later, I replied him that according to the drawings and parameter requirements of this ultra-high precision hydraulic flow control valve, AAK needed at least 45 days to complete the sample production. Hedwig said it was acceptable. After 40 days, AAK sent 20 samples of hydraulic flow control valves. 1 month later, Hedwig emailed that thanks to AAK ultra-high precision hydraulic flow control valve, the company won the bid.

Hedwig told me privately that his boss was very satisfied with his purchasing work this time, and said that he would double the year-end bonus this year. He also wanted to know why so many manufacturers can't do it, but AAK can?

I told him that the cylindricity of the inner hole of AAK hydraulic flow control valve sleeve was within 1μm by virtue of the following unique 3 points:

1. The process is the key and the technology is the core of the processing of valve sleeve inner hole. AAK adopts 6 process steps: deep hole drilling pre-holing, vacuum quenching, rough honing, semi fine honing, artificial aging treatment and fine honing, while most manufacturers can only do 3 steps.

2. AAK adopts American precision honing machine to hone the inner hole for 3 times, including rough honing, semi fine honing and fine honing, ensuring the cylindricity of the inner hole is in the range of 0.4-0.75μm.

3. Mechanic operation is also the most important, AAK adopts dedicated person and machine, not to say that human-machine integration, but at least as proficient as just like the left hand touching the right hand.

AAK hydraulic flow control valve, can be used in aviation field. You can also have a small try!

Margaret, from India, is an old hand in the procurement of hydraulic components, especially good at price reduction, and has little cooperation with AAK, basically small quantities of high requirement hydraulic valves. 1 year ago, she wanted us to develop a high requirement hydraulic flow control valve and promised that there will be big qty of reorders. After the trial order was sent, there was still no reorder, and I didn't want to push. In her email last month, she said that 160 hydraulic flow control valves tested last year were needed, and the price was required to be maintained and the fastest delivery time was required.

This hydraulic flow control valve was used in hydraulic bending machine equipment, and the early test run was very smooth. The equipment was sold very well. Unexpectedly, 3 months later, customers complained about the weakness of the hydraulic system of the bending machine. Some valve spools and valve bodies of the hydraulic flow control valves were worn, causing leakage, resulting in the weakness of hydraulic system of bending machine. The original hydraulic flow control valve manufacturer believed that the bending machine was used with high frequency, so a small proportion of wear was normal, but Margaret's supervisor didn't think so. He predicted that there would be more and more complaints later. In fact, what his supervisor predicted was right. Margaret had to change the manufacturer. She contacted many manufacturers, but none of them was willing to develop it because of the small quantity or they couldn't meet her requirements. Margaret was worried at this time.

Until receiving her email, I just knew that this hydraulic flow control valve had reorders, but were not placed with AAK, she came to me this time because she had no way. Frankly speaking, although AAK had existing procedures, I didn't want to produce this order for 160 pcs of quantity. It was not until her boss found my boss 3 days later that I gave a 1 month production time and a 50% increase in the quotation. Margaret still approved our S/C. She was criticized by her boss because they not only lost the payment to the original hydraulic flow control valve manufacturer, but also undertook an additional 50%. I estimate that Margaret will never dare to transfer the order of AAK again.

I was thinking that if your hydraulic valve manufacturing quality and service level are high, in the communication with customers, you can be polite and dignified, neither humble nor overbearing, otherwise the customers don't take you seriously. The business should be done standing. Although AAK price of this hydraulic flow control valve has been increased by 50%, it has taught Margaret and me a lesson. I sent out 160 hydraulic flow control valves in only 2 weeks. Margaret was very grateful for my advance shipping, and we had mended the fences between us.

It took us 2 months to test the sample of this hydraulic flow control valve. We knew its difficulties, and we solved it with 3 points:

1. The valve spool is made of 20CrNi2MoV high carburized bearing steel from Germany. Through secondary quenching + cryogenic treatment + low temperature tempering process, the molecular structure of the material is improved, the microhardness is 237 ~ 247 HV, and its wear resistance and contact fatigue performance are increased by more than 3 times.

2. Swiss machine tools are used for processing, coupled with AAK's own modified fixtures, human errors are eliminated.

3. We can achieve 3drops/min for this hydraulic flow control valve, which is benchmarked with HydraForce, while most peers can only achieve 5drops/min.

AAK hydraulic flow control valve is not only wear-resistant, but also leak free. You can also have a small try!

Shirley comes from a hydraulic equipment company in the United States, who is an old employee of the company. She rarely fails in purchasing, and her cooperation with AAK is tepid. It was not until the cartridge hydraulic flow control valves purchased last year failed that she learned that AAK Hydraulic Valve was different from other hydraulic cartridge valve manufacturers, and now she is sending us more and more inquiries.

At the beginning of the year before last, Shirley’s company sold the hydraulic power unit for metal extrusion equipment. Less than half a year, customers complained that the pressure of the power unit was abnormal, and even went on strike. During after sales service, it was found that the leakage was caused by the serious wear of the hydraulic flow control valve sleeve, resulting in abnormal equipment pressure. The original hydraulic flow control valve manufacturer replied that under the high-pressure working condition of 450bar and high-frequency use, it is unavoidable for the hydraulic flow control valve sleeve to be worn and the only solution is to replace with new one for free, but 5 months later, the same problem occurred again. The customer was not satisfied and complained directly to the boss. The boss was surprised that an old hand like Shirley would stumble. After investigation, it was found that this hydraulic valve manufacturer who had cooperated for 5 years ignored the details of high pressure and high frequency.

The boss asked her to change the manufacturer and replace those severely worn hydraulic flow control valves as soon as possible. Shirley thought of AAK, because at the beginning of the inquiry, AAK mentioned that this hydraulic flow control valve had special working conditions, if the material selection was not proper, it would be impossible to use it for 1 year or more. After learning of Shirley's procurement dilemma, AAK urgently produced 50 hydraulic flow control valves within 1 month for them to replace the current ones. 6 months after the trial order was delivered, Shirley informed us by email that the equipment installed with AAK hydraulic flow control valve was working well without any abnormalities, and I said there would be no abnormalities even in 1 year. Shirley admired the confidence of AAK Hydraulic Valve in quality, and ordered another 300 hydraulic flow control valves.

Under the high-pressure condition of 450bar, to get the hydraulic flow control valve used in high frequency a service life of more than 1 year or 2million times, AAK Hydraulic Valve uses 3 advantages to exceed peers.

1. The valve sleeve of AAK hydraulic flow control valve adopts 18Cr2Ni4WA high-strength alloy carburized steel. During heat treatment, carburize at 900~920 ℃, temper at 600~650 ℃, and then cryogenic treatment. In this way, the hardness of the valve sleeve is more than HRC65, and it is not afraid under the high pressure condition of 450bar. The difficulty of this material lies in heat treatment, while most of hydraulic valve manufacturers can not control this technology.

2. AAK has independently developed hydraulic valve durability test equipment, and carries out fatigue test on materials in combination with NFPA/T2.6.1 standards to ensure that each hydraulic flow control valve is qualified before shipment.

3. For the hydraulic cartridge valve with a service life of 2 million times under 450bar high pressure, AAK has customers who used them in aviation.

AAK hydraulic flow control valve, durable under high pressure and high frequency use, you can also have a small try!

Nancy comes from a hydraulic equipment company in the United States. In October last year, they developed a hydraulic power unit that used a hydraulic counterbalance valve. Nancy purchased the standard parts of SUN hydraulics counterbalance valve according to the model required by the engineer. During the commissioning of the hydraulic power unit, the oil cylinder shook and made abnormal noise shortly after the equipment was started. After checking the design principle and installation method, the engineer judged that the problem probably lied in the hydraulic counterbalance valve. They asked to replace it with a new hydraulic counterbalance valve, but SUN after-sales personnel said that there would be no problem with the SUN hydraulic counterbalance valve and were unwilling to replace it. The engineer tested the hydraulic counterbalance valve separately, and the parameters were also normal. The technical team was confused. The promotion date of the new equipment was coming, but the machine test was stuck now, and the boss was also very anxious.

Nancy tried to consult with different hydraulic counterbalance valve manufacturers, but after a week, there was no progress. She found AAK on Google and left a message to us: After using SUN hydraulic counterbalance valve, the equipment commissioning was abnormal, but no abnormality was found in the separate test of hydraulic counterbalance valve. At first glance, there seems to be no solution. Our engineer suggested Nancy to provide working condition requirements, hydraulic schematic diagram and equipment abnormal video. After discussion, AAK technical team judged that there was a problem with the flow selection of the hydraulic counterbalance valve. I told her that the flow difference of the cylinder diameter ratio of their power unit was 2.3 : 1. Although this ratio could be used for the standard parts of SUN hydraulic counterbalance valve, its stability was difficult to be guaranteed. This was the reason why the oil cylinder vibrated and made abnormal noise during the test run.

Their engineers also recognized the reasoning of AAK technical team and asked AAK to customize standard two-way hydraulic counterbalance valves with appropriate flow. 45 days later, AAK sent 20 hydraulic counterbalance valves for test order. 2 weeks later, Nancy informed by email that the test run was successful with AAK hydraulic counterbalance valves, and the oil cylinder jitter and abnormal noise were disappeared, which could also catch up with the promotion of the equipment. Purchased a hydraulic counterbalance valve with unsuitable flow, no one in the company could solve the problem. It was solved by using AAK non-standard customized hydraulic counterbalance valves.

Our engineers redesigned the hydraulic counterbalance valve, converted the appropriate flow according to the cylinder diameter ratio, adopted small cavity and small flow, and added bypass damping at the control port of the hydraulic counterbalance valve to improve the control stability of the valve, which can also completely solve the shaking and abnormal noise of the oil cylinder.

Nancy privately told me that the boss was very satisfied with her behavior. The problem that should have been solved by the technician was solved by the purchaser. The boss not only praised her in public, but also let her win double the year-end bonus.

AAK hydraulic counterbalance valve, the non-standard customized design can replace SUN, you can also have a small try!

Last Wednesday, there was a repeat order from Peppe for a hydraulic valve block, which was tested in the second half of last year. Peppe required that the repeat order quality should be 100% burr free as same as the hydraulic valve block tested samples last year. Peppe comes from a hydraulic equipment company in Italy. At the beginning of last year, the paper cutter equipment they sold would stop automatically and was complained by customers. It was found that the hydraulic relief valve was stuck on the site, and the after-sales servicer thought that there was a problem with the hydraulic relief valve. After the original hydraulic valve block manufacturer disassembled it, it was found that there were debris at the moving part of the valve spool. At the same time, foreign matters were also found in the hydraulic oil, so it was known that it was caused by the incomplete burr cleaning of the hydraulic valve block.

The original hydraulic valve block manufacturer also does not deny it. The burr cleaning of the inner cavity of the oil channel, the cross hole and the blind hole of this hydraulic valve block was indeed less than 100%. As long as the hydraulic oil can be replaced every 3 months, the problem can be solved. Peppe was very speechless and had to find a new hydraulic valve block manufacturer, and deliberately required 100% burr free. She contacted more than 10 hydraulic valve block manufacturers, they either gave no reply or could only have a try, but Peppe didn't have time to test, and began to worry.

Peppe noticed the introduction of "100% burr free hydraulic valve block" in AAK on Google, so she directly sent us an email. I told her, "according to your hydraulic valve block drawing, there are many inner cavities and cross holes in the oil duct, especially the burr cleaning at the blind hole is a difficult problem. The traditional abrasive flow deburring method to remove this hydraulic valve block has hidden dangers. AAK suffered from it 5 years ago, and it was not until we used the new deburring technology that we dared to ensure 100% burr free". Peppe asked us to make samples as soon as possible. A month later, AAK sent 5 hydraulic valve blocks.

6 months later, Peppe emailed us that the paper cutter installed with AAK hydraulic valve block has been working normally. I told her that AAK adopted an intelligent grinding processing system to replace the traditional abrasive flow process. If this hydraulic valve block is deburred with abrasive flow, and the blind hole is easy to form a dead corner. The intelligent grinding and processing system can realize automatic solution. In the grinding process of the hydraulic valve block, with continuous power support and stability, the main shaft of the equipment can swing 360 °, which can realize the grinding of any angle and any inclined plane. No matter in the fixture positioning, or in the automatic optimization compensation of the simulation path simulation of the hydraulic valve block structure, the intelligent grinding processing system has no dead corner. No matter the surface of the hydraulic valve body, or the inner hole, cross hole, blind hole of the hydraulic valve block, as well as the end face and inner and outer contour of the orifice, the burrs can be completely removed.

AAK hydraulic valve block, no burr, you can also have a small try!

Last Wednesday, there was a repeat order from Peppe for a hydraulic valve block, which was tested in the second half of last year. Peppe required that the repeat order quality should be 100% burr free as same as the hydraulic valve block tested samples last year. Peppe comes from a hydraulic equipment company in Italy. At the beginning of last year, the paper cutter equipment they sold would stop automatically and was complained by customers. It was found that the hydraulic relief valve was stuck on the site, and the after-sales servicer thought that there was a problem with the hydraulic relief valve. After the original hydraulic valve block manufacturer disassembled it, it was found that there were debris at the moving part of the valve spool. At the same time, foreign matters were also found in the hydraulic oil, so it was known that it was caused by the incomplete burr cleaning of the hydraulic valve block.

The original hydraulic valve block manufacturer also does not deny it. The burr cleaning of the inner cavity of the oil channel, the cross hole and the blind hole of this hydraulic valve block was indeed less than 100%. As long as the hydraulic oil can be replaced every 3 months, the problem can be solved. Peppe was very speechless and had to find a new hydraulic valve block manufacturer, and deliberately required 100% burr free. She contacted more than 10 hydraulic valve block manufacturers, they either gave no reply or could only have a try, but Peppe didn't have time to test, and began to worry.

Peppe noticed the introduction of "100% burr free hydraulic valve block" in AAK on Google, so she directly sent us an email. I told her, "according to your hydraulic valve block drawing, there are many inner cavities and cross holes in the oil duct, especially the burr cleaning at the blind hole is a difficult problem. The traditional abrasive flow deburring method to remove this hydraulic valve block has hidden dangers. AAK suffered from it 5 years ago, and it was not until we used the new deburring technology that we dared to ensure 100% burr free". Peppe asked us to make samples as soon as possible. A month later, AAK sent 5 hydraulic valve blocks.

6 months later, Peppe emailed us that the paper cutter installed with AAK hydraulic valve block has been working normally. I told her that AAK adopted an intelligent grinding processing system to replace the traditional abrasive flow process. If this hydraulic valve block is deburred with abrasive flow, and the blind hole is easy to form a dead corner. The intelligent grinding and processing system can realize automatic solution. In the grinding process of the hydraulic valve block, with continuous power support and stability, the main shaft of the equipment can swing 360 °, which can realize the grinding of any angle and any inclined plane. No matter in the fixture positioning, or in the automatic optimization compensation of the simulation path simulation of the hydraulic valve block structure, the intelligent grinding processing system has no dead corner. No matter the surface of the hydraulic valve body, or the inner hole, cross hole, blind hole of the hydraulic valve block, as well as the end face and inner and outer contour of the orifice, the burrs can be completely removed.

AAK hydraulic valve block, no burr, you can also have a small try!

Last week, once a hydraulic manifold drawing was approved, the customer wired the full payment of more than US$50,000 US dollars at one time, and the delivery was 2 months later. This is a customized hydraulic manifold. It is the first order from an Italian customer. It is the first time for him to cooperate with AAK Hydraulic Valves. I think behind his action is his trust in AAK Hydraulic Valves. If we say what is the most important asset in the future, I think it is "trust". If what is the most terrible risk in the future, I think it is "lack of trust".

Some customers agree with the manufacturing quality of AAK Hydraulic Valves, know that AAK is the supplier of the first brand of hydraulic valves (HydraForce) for 9 consecutive years, and know that although AAK Hydraulic Valves are 20% more expensive than their peers, its service life is twice that of their peers, but they don't place orders. Why?

There are only 2 reasons: first, he is not a customer of AAK. Second, customers do not trust AAK enough, or AAK does not deliver enough trust. So trust is very important for the first order customers.

Is it your customer? This is a very interesting topic. One third of the customers and you are predestined, trust each other, and work with him at the same frequency, and feel not tired; One third of the customers have no fate with you. No matter what you do, there will be no reply after you quoted the price; One third of the customers need to be won over and moved.

This is what I think and do in regards of trust.

First of all, learn to trust others, but also learn to be trusted. Those who can trust others are lucky mountains. You dare to trust others, which proves that you need the help of the other party, and it also proves that you are willing to give your back to the other party, not afraid of being stabbed by him.

Then, expose yourself in exchange for more cooperation. If you always guard against others, there is no possibility of cooperation. Trust others and give my back to them. If you rely on others, others also rely on you. And the person who can be trusted is a powerful sea.

Yes, the customer of AAK Hydraulic Valves is lucky mountain, and AAK is the strong sea of customers.

Finally, it is the transmission of trust. If others want to cooperate with you as soon as they see you, because you can help others. If I help more people, it will be my motivation and responsibility.

For AAK Hydraulic Valves, the customer is mountain, we are the sea.

The guard told me on Monday that there was an international parcel in the office. From the shipment airway bill, it was a sample of hydraulic valve block from an old American customer Zero. I was a little puzzled. Zero only purchases hydraulic cartridge valves from AAK. I didn't know why he sent me the hydraulic valve block sample until I read all the emails today.

Zero introduced in the email that he purchased this hydraulic valve block from a friend, the quantity was not big, just 100 pieces. The hydraulic valve block was easy to leak after being used for a period of time. He didn't know the source of the leak and asked me to help have a check. After the pressure test and inspection, our technician analyzed that the leakage was serious and the pressure could not reach the pressure value of the system. I told Zero that the original manufacturer of this hydraulic valve block judged that the hydraulic valve block was qualified without strictly controlling the data in the pressure test stage.

For this kind of hydraulic valve block, AAK did this in the pressure test stage, and this method has been used since 5 years ago. After the production of the hydraulic valve block is completed, start the pressure test. First, adjust the throttle valve opening on the hydraulic valve block to the maximum, and at the same time, adjust the pressure valve adjusting spring to a very loose state, and then gradually increase the pressure. When the pressure reaches the required test pressure, our pressure holding time is 10min, while the pressure holding time of most hydraulic valve block manufacturers is 3min. The problem is easy to be exposed if the pressure is maintained for a long time. If there is leakage during the pressure maintenance, the source can be traced, and special treatment of sealing glue can be added at the joint surface. At the same time, after the test is completed, adjust the relief valve on the hydraulic valve block to the set pressure value required by the system to achieve the internal pressure balance of the valve block system. Few manufacturers do this step.

Zero realized that only AAK could ensure that there was no leakage in the hydraulic valve block, so he asked me to arrange 100 hydraulic valve blocks on the production line in a hurry. The pressure maintaining test is the key to check the leakage, but to produce a leak-free hydraulic valve block, AAK do these in production: first, select the appropriate processing material according to the working conditions of the customer's hydraulic valve block, and ensure that the internal organization of the processed valve block material is dense, without foreign objects, sand holes and other defects. If necessary, flaw detection will be carried out on the blank material. Secondly, the control of machining precision is also very strict, and the machining of all threaded holes on the valve block is guaranteed to be above 7H; In addition, the perpendicularity tolerance between the screw hole of the installation pipe joint and its external mating surface shall be at least Class 8.

For picky hydraulic valve blocks, production is the core and detection is the key. AAK strictly controls these 2 processes to ensure that the hydraulic valve block has no leakage. There are not many manufacturers who can achieve these 2 details. It is not that they don't want to do it, but that they don't have enough ability to control the details.

AAK hydraulic valve block, no leakage, welcome to try!

Logan, a German hydraulic customer, left a message on AAK Hydraulic Valves website some time ago: Are you able to process the hydraulic relief valve with deep cavity and precision hole? After getting his hydraulic relief valve drawing, it is indeed difficult to process. Logan told us that he had contacted more than 20 hydraulic relief valve manufacturers, and all of them said that they were not able to process the “very deep cavity and very small hole". Five days passed, even the factory was still not determined. The boss was very dissatisfied, and he couldn't sleep at night.

According to his drawing requirements: the deep cavity of the hydraulic relief valve is Φ 16mm, the depth reaches 40mm, and the small hole in the deep cavity is Φ (0.5 ± 0.02) mm, and the top of the small hole is with a convex sealing surface, with an outer circle Φ 1mm, the diameter of the small hole is 0.5mm, the depth is 5mm, and the coaxiality between the deep cavity small hole and the convex sealing surface is required to be Φ 0.01mm, and the verticality between the convex sealing surface and the deep cavity is required to be 0.01mm. I told him that this processing must be completed by clamping at one time without any deflection, otherwise the accuracy is difficult to meet the standard. The headache is that the ratio of diameter to length of the small hole in the deep cavity of this hydraulic relief valve is 1:10, which belongs to deep hole processing, and the small hole is inside the deep cavity. For such a complicated hydraulic relief valve that is extremely difficult to process, if AAK can't handle it, it is not necessary to try any other hydraulic cartridge valve manufacturers in Ningbo.

Logan asked me how confident AAK was that the sample would be successful. When he learned that AAK was only 80% sure, he considered for a long time, and finally decided to have a try, paid the development fee, and confirmed the trial order. AAK technical team discussed and simulated for 2 days, and determined the scheme of optimizing processing technology. After 4 weeks, AAK sent 5 samples of hydraulic relief valves. Two weeks later, Logan's email came with admiration and thanks. He didn't expect that AAK sample was successful at one time. The precision of the deep cavity and small hole of AAK hydraulic relief valve samples reached the standard, and all the parameter requirements were completely consistent with the drawing requirements.

Logan is curious that all other hydraulic relief valve manufactures were not able to try this order, how does AAK overcome the difficulty of the deep cavity and small hole accuracy? According to the requirements of precision parameters of deep cavity small holes in the drawing, AAK has made 3 optimization points in processing technology:

1. Design the clamping setting of drilling tools to increase the rigidity of the drill bit.

2. Improve the drilling tool. In order to ensure the surface roughness requirements of deep cavity holes, after rough machining with twist drill, finish machining with reamer.

3. The design is equipped with a drill sleeve to realize manual feed drilling. Mechanical feed cannot feedback the cutting force. By manual feed, the feed rate can be effectively controlled to avoid drilling deviation and meet the parameter requirements. Of course, most manufacturers cannot master the details of this operation.

AAK hydraulic relief valve has unique skills in processing deep cavity holes. You are welcome to try the order!

AAK hydraulic pressure control valves with pressure resistance above 450bar and high frequency use for more than 1 year without wear. After a year of trial, Romero reordered 800 hydraulic pressure control valves last week.

Romero is from a hydraulic equipment company in Spain, and he is an old hand in purchasing hydraulic cartridge valves in China. At the beginning of last year, their company tested a hydraulic crushing hammer, which needed a hydraulic pressure control valve. After first round of factory comparison, Romero selected one factory to test the hydraulic pressure control valves. One month later, the hydraulic crushing hammer sample was successful. However, after 3 months of trial use, their customer found that the impact frequency decreased by more than 30%, which should be due to the insufficient power supply caused by the leakage of the hydraulic pressure control valves. After disassembly, it was found that there were obvious impact wear marks at the valve sleeve.

According to the feedback of the original hydraulic pressure control valve manufacturer, the working pressure of the hydraulic crushing hammer is more than 450bar. If the frequency of use is too high, wear is inevitable, but the customer is not satisfied with the service life of the crushing hammer, and the purchase can be made only after the warranty of more than 1 year. The boss was unwilling to lose the order for the equipment that they spent several months to develop. Romero was asked to look for hydraulic pressure control valves with a warranty of more than 1 year and high pressure resistance, but nothing was gained after 2 weeks. Romero felt a big pressure.

From the inquiry email he sent me, I can feel his helplessness. The requirements of this hydraulic pressure control valve are different from those of standard parts, especially in precision and durability, but AAK is confident to make it successful. After 40 days, AAK sent 30 samples of hydraulic pressure control valves. During this period, Romero just informed us that he had received the samples, and there was no further news within 1 year. Until last week, he suddenly placed the reorder, and in the email, he thanked AAK for providing a hydraulic pressure control valve with 1 year warranty, so that they won the order back, and there was no after-sales service needed within 1 year.

For the hydraulic pressure control valves that can withstand 450bar high pressure and has no worries for more than 1 year, in Ningbo hydraulic cartridge valve industry, AAK has no competitors. We use 3 advantages to be different from peers:

1. In terms of materials, the valve body is made of SCM415 chromium molybdenum steel alloy steel from Japan, and its process and mechanical properties are more than 70% stronger than those of similar materials. After carburization and heat treatment, the hardness is more than HRC64, and the wear resistance and strength are also increased by more than 3 times, ensuring no wear for more than 1 year. However, the processing of this material is difficult to control, which is also the reason why peers do not choose this material.

2. In terms of equipment, GILDEMEISTER turning milling complex machining center imported from Germany is used to achieve efficient and accurate processing. At present, most hydraulic cartridge valve manufacturers do not have such equipment.

3. In terms of detection, after the hydraulic pressure control valves are assembled, they are tested with the high-pressure test bench and durability test equipment independently developed by AAK, the pressure, flow and fatigue resistance of the valves can not escape from the eyes of Monkey King, ensuring 100% qualification.

AAK hydraulic pressure control valves, careful material selection, fine machining, fine inspection, you can also have a small try!