Check valve definition
Check valve refers to the valve that automatically opens and closes the valve disc depending on the flow of the medium itself to prevent the backflow of the medium, also known as check valve, one-way valve, reverse flow valve, and back pressure valve.
Check valve action
The check valve is an automatic valve. Its main function is to prevent the reverse flow of medium, the reverse rotation of pump and drive motor, and the discharge of container medium. The check valve can also be used on the pipeline to supply the auxiliary system whose pressure may rise above the system pressure.
Classification of check valves
Check valves can be divided into:
1. swing check valve
The disc of the swing check valve is disc-shaped and rotates around the rotating shaft of the valve seat channel. Because the channel in the valve is linear, the flow resistance is smaller than that of the lift check valve. It is suitable for large-diameter occasions with low flow rate and infrequent flow changes, but it is not suitable for pulsating flow. Its sealing performance is not as good as that of the lift check valve. Swing check valves are divided into three types: single disc, double disc and multi half. These three types are mainly divided according to the valve diameter, so as to prevent the medium from stopping or reversing flow and reduce the hydraulic impact
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Post time: Jun-06-2022