The check valve is mainly used to prevent the backflow of medium, reverse rotation of pump and drive motor, and discharge of container medium. The check valve can also be used to feed the auxiliary system whose pressure may rise above the system pressure.
Check valves are commonly used in our lives. What is the role of check valves?
Brief introduction of check valve
Check valve refers to a kind of valve whose opening and closing parts are round discs and whose action is generated by its own weight and medium pressure to block the backflow of medium. The structure of check valve can be divided into three categories, namely lifting check valve, swing check valve and butterfly check valve.
Function of check valve
The check valve is mainly used to prevent the backflow of medium, reverse rotation of pump and drive motor, and discharge of container medium. The check valve can also be used to feed the auxiliary system whose pressure may rise above the system pressure. The check valve can be divided into swing check valve (rotating according to the center of gravity) and lift check valve (moving along the axis).
Working principle of check valve
The check valve opens under the action of fluid pressure flowing in one direction; When the fluid flows in the opposite direction, the fluid pressure and the self reclosing valve disc of the valve disc act on the valve seat to cut off the flow. The check valve belongs to this type of valve, which includes swing check valve and lift check valve. The swing check valve has a hinge mechanism, and a valve flap like a door freely rests on the inclined valve seat surface. In order to ensure that the valve clack can reach the proper position of the valve seat surface each time, the valve clack is designed in the hinge mechanism, so that the valve clack has enough swing space, and the valve clack really and comprehensively contacts the valve seat.
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