A check valve refers to a valve that automatically opens and closes the valve disc based on the flow of the medium itself, used to prevent the backflow of the medium. It is also known as a check valve, one-way valve, backflow valve, and back pressure valve. Check valve belongs to an automatic valve, whose main function is to prevent medium backflow, prevent pump and drive motor from reversing, and prevent the release of container medium.

Pressure testing method for check valves:

Check valve test status: The axis of the lift check valve disc is in a position perpendicular to the horizontal; The axis of the rotary check valve channel and the axis of the valve disc are located approximately parallel to the horizontal line.

During the strength test, the test medium is introduced from the inlet end to the specified value, and the other end is closed. It is considered qualified if there is no leakage in the valve body and valve cover.

The sealing test is conducted by introducing the test medium from the outlet end, and checking the sealing surface, packing, and gasket at the inlet end for no leakage, which is considered qualified.

Shanghai Mingjing Anti corrosion Valve Manufacturing Co., Ltd

Technical Department