The problem of water hammer in the piping system is exacerbated for high pressure piping systems where multiple pumps are used together.

Water hammer is a pressure wave of changing flow in a pressure pipe, it is a hydraulic shock caused by a rise or fall in pressure caused by changes in the fluid flow rate in the pressure pipe.

To prevent the potential danger of water hammer in pipes, researchers have used certain new structures and materials in the design of check valves over the years. Encouraging progress has been made in reducing the impact of water hammer while ensuring the applicable performance of the check valve.

A check valve is a valve that automatically opens and closes the valve plate by relying on the flow of the medium itself. It is used to prevent the backflow of the medium, so it is also called a one-way valve, unidirectional valve.

Check valve can be divided into wafer check valve, swing check valve and lift type check valve.