Research on silent steady flow quick closing check valve for rail vehicle

Abstract a kind of air valve which can prevent gas backflow is used in the track air supply system. Check valve is the basic component of fluid control engineering, which is widely used. It plays a role in determining the direction of fluid flow, protecting other fluid machinery and pipeline safety by preventing the reverse flow of fluid [1] . For example, drilling tool check valves commonly used in oil fields include arrow type valve, float valve and input type check valve [2-3] . The check valve developed by our company is mainly used for gas medium, suitable for high-pressure gas transmission, and plays the role of preventing gas backflow.