Do you know the principle of large diameter check valve?

Do you know the principle of large diameter check valve? Large-diameter check valves are widely used in large water supply and drainage, fire protection, HVAC, industrial and other system pipelines. To prevent reverse flow of medium, check valves shall be installed on equipment, devices and pipelines. Large-diameter check valves are generally installed at the outlet of large water pumps. They can be quickly closed before the water flow reverses to avoid water hammer, water hammer and destructive impact, so as to achieve the purpose of silence, preventing media backflow and protecting equipment.

Large-diameter check valve refers to the valve that automatically opens and closes the valve disc depending on the flow of the medium, and is used to prevent the backflow of the medium. It is also called check valve, one-way valve, backflow valve, and backpressure valve. The large-diameter check valve is an automatic valve. Its main functions are to prevent media backflow, reverse rotation of pump and drive motor, and discharge of container media. The large-caliber check valve can also be used to supply the pipeline for 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).

The function of the large-diameter check valve is to allow the medium to flow in only one direction and prevent the flow in the opposite direction. Usually, the valve works automatically. Under the pressure of fluid flowing in one direction, the valve disc opens; When the fluid flows in the opposite direction, the fluid pressure and the self-closing valve disc of the valve disc act on the valve seat, thus cutting off the flow.