Check valve
Check valve refers to a valve that automatically opens and closes the valve flap depending on the flow of the medium itself to prevent media backflow.The function of the check valve is to only allow the medium to flow in one direction, and to prevent the flow in that direction. It operates automatically. Under the pressure of the fluid flowing in one direction, the valve flap opens; When the fluid flows in the opposite direction, the valve seat is affected by the fluid pressure and the self closing of the valve flap, thereby cutting off the flow.
