This type of valve is used to prevent backflow of media, using the fluid's own kinetic energy to turn itself on, and automatically shut off when flowing in the opposite direction. Often located at the pump outlet, trap outlet and other places do not allow fluid to flow in the opposite direction. Check valve spin-on type, lift and the folder-type three.
For swing check valves, fluid flows only from left to right and automatically closes in reverse flow. For lift check valves, when the fluid flows from left to right, the spool lifts up to create a passage, and when the reverse flow occurs, the spool is pressed against the valve seat and closed.
For the wafer check valve, when the fluid flows from left to right, the valve core is opened to form a passage. When the valve core is reversely flowed, the valve core is pressed onto the valve seat to be closed, Installation, small size, light weight, compact structure.
