How check valves work

Check valve is to rely on the flow of the medium itself and automatically open, close the disc, used to prevent media backflow valve, also known as check valve, one-way valve, reverse flow valve, and back pressure valve.Check valve belongs to a kind of automatic valve, its main function is to prevent the backflow of media, prevent the reversal of pump and drive motor, and the release of container media.Check valves can also be used in piping where pressure may rise above system pressure to supply an auxiliary system.
 
The purpose of a check valve is to allow media to flow in only one direction and to stop the flow in that direction.Normally the valve works automatically and the disc opens under pressure from a flow of fluid in one direction.Flow in the opposite direction, by the fluid pressure and disc self - coincidence disc on the seat, thereby cutting off the flow.
 
How check valves work
 
Check valve also known as check valve or check valve, water pump suction off bottom valve also belongs to check valve class.Check valves are valves that automatically prevent backflow.The check valve disc opens under fluid pressure from the inlet side to the outlet side.When the inlet side pressure is lower than the outlet side, the disc will automatically close under the action of fluid pressure difference, gravity and other factors to prevent fluid backflow.When the check valve is closed, it will cause water hammer pressure in the pipeline, which will cause damage to the valve, pipeline or equipment, especially for the big mouth or high pressure pipeline, so it should cause the check valve selector to pay high attention.Do not allow check valves to bear weight in the line. Large check valves should be independently supported to protect them from piping pressure.Pay attention to the direction of medium flow during installation should be consistent with the arrow direction of valve body.