Check valve common faults are: (1) the disc break;
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.