A common fault of the check valve

Check valve common faults are: (1) the disc break; (2) medium. The cause of valve handle broken is: medium pressure before and after the check valve in close to equilibrium and each other & other; See-saw & throughout; The status of the valve do often flap and valve seat, some brittle material ( Such as cast iron, brass, etc. ) Made of valve was broken. Prevention method is to adopt valve for ductile material check valve. Check valve backflow medium reasons: (1) sealing surface damage; (2) the clip into the impurities. Repair the sealing face and remove impurities, can prevent backflow.