Check valves in gas service can also experience wear, so those applications should be thoroughly investigated as well. In order to extend the life of the check valve, the causes of wear and the solutions for reducing wear need to be understood.
Check valves are self-actuating valves.
The operation of a check valve is dependent on the velocity and condition of the flow through it. Therefore, sizing and installation considerations are critical for insuring long service life and reliability of any check valve. This audible tapping sound is an indication that the check valve is experiencing pre-mature wear. Disc tapping on the stop due to high flows and shedding of the liquid off the end of the disc, creating turbulence behind the disc Liquid or gas turbulence immediately upstream of the check valve Excessive disc chattering differs depending on the type of check valve design. For check valves with the single disc hinged at the top of the valve, the disc must overcome gravity and the weight of the disc to be in a stable operating position.