The closing part of the diaphragm check valve is composed of a diaphragm, which is offset or bonded to the valve seat. The diaphragm check valve is a new structural form of check valve. Although its use is limited by temperature and pressure, it has developed rapidly in recent years due to its good waterproof performance.
Diaphragm check valves can be divided into two different designs: flat plate type and duckbill type
