Wafer｜flanged silent check valve

wafer/flanged check valve is a valve with a circular disc and action by its own weight and medium pressure to block the backflow of the medium. Automatic valve, also known as reverse valve, one-way valve, backflow valve or isolation valve. Disc movement is divided into lift type and swing type. Lift check valve and stop valve structure similar, only lack of drive disc stem. The medium flows in from the inlet (lower side) and out of the outlet (upper side). The valve is opened when the inlet pressure is greater than the weight of the disc and its flow resistance. Conversely, the check valve is closed when the medium is reversed. The rotary check valve has an oblique disc that rotates around the shaft, working in a manner similar to that of the lift check. A check valve is often used as a bottom valve for pumping devices to prevent the return of water. Stop valve and stop valve combination use, can play the role of safety isolation. The disadvantage is that the resistance is high and the sealing property is not good when it is closed.