The expansion valve in a car removes any pressure on the liquid refrigerant and allows it to change states from liquid to vapor in the evaporator. It is a component of the car's air condition system. Like any other valve, it controls the flow. If too much refrigerant enters the evaporator, it can make the environment too cold and the moisture could collect and freeze. This would make your environment too dry. If too little refrigerant enters the evaporator, it may not be enough to absorb the heat, which would make your environment feel even hotter and provide no cooling at all. eWorldTrade has the aim to connect businesses globally. You can easily get in touch with the manufacturer or supplier of your liking and inquire about the products, terms, or anything else that you may need to know. The lowest bulk rates on great quality products that you won't find anywhere else. For feedback on any additional help, our customer support is always available.