Flange check valve refers to the valve that automatically opens and closes the valve flap depending on the flow of the medium to prevent the medium from flowing backward. It is also known as a check valve, check valve, reverse flow valve, and back pressure valve. The check valve belongs to an automatic valve, and its main function is to prevent the medium from flowing backward, to prevent the pump and the drive motor from reversing, and to release the container medium. Check valves can also be used to supply lines to auxiliary systems whose pressure may rise above the system pressure. The check valve can be mainly divided into a swing check valve (rotating according to the center of gravity) and a lifting check valve (moving along the axis). Our company provides WCB dual plate wafer check valve.
The purpose of this type of valve is to allow the medium to flow in only one direction and prevent it from flowing. Usually, this kind of valve works automatically. Under the action of fluid pressure flowing in one direction, the valve flap opens; when the fluid flows in the opposite direction, the pressure of the fluid and the self-reclosing valve flap of the valve act on the valve seat, thereby cutting off the flow.
The flange check valve belongs to this type of valve, which includes a swing check valve and a lift check valve. The swing check valve has a hinge mechanism, and a flap-like door rests freely on the inclined seat surface. In order to ensure that the valve disc can reach the appropriate position on the valve seat surface every time, the valve disc is designed in a hinge mechanism so that the valve disc has enough swing space and the valve disc is truly and comprehensively in contact with the valve seat. The discs can be made entirely of metal, or they can be inlaid with leather, rubber, or a synthetic covering, depending on the performance requirements. The swing check valve is fully open, the fluid pressure is almost unhindered, so the pressure drop across the valve is relatively small.
The above information is provided by wholesale check valve supplier.