Description

Flanged check valve refers to the flow of the medium itself and automatically open and close the valve flap, used to prevent the media back flow valve, also known as check valve, one-way valve,
Counter flow valve and back pressure valve. The check valve belongs to an automatic valve, whose main function is to prevent the backflow of medium, prevent the reverse of pump and drive motor, and release the container medium. The check valve can also be used to provide a supply to the auxiliary system where the pressure may rise above the system pressure. The check valve can be mainly divided into swing check valve (rotating by gravity center) and lift check valve (moving along the axis).
The function of this type of valve is to allow the medium to flow in one direction and to prevent flow in the direction. Usually the valve is automatically work, fluid pressure flow in one direction, the valve open; the opposite direction of fluid flow by gravity, fluid pressure and valve closing effect on the valve seat, thereby cutting off flow.

Structural installation:

The valve flange type check valve cylindrical disk-shaped, around the seat of the shaft for rotation channel, because the valve channel into a streamlined, flow resistance than the small rise butterfly valve, suitable for large caliber occasions in low flow and no flow frequently changes, but not for the pulsating flow, the sealing performance is less than lifting type. Butterfly check valve is divided into single, double flap and most of the three kinds, these three forms are mainly divided into the valve bore, the purpose is to prevent the media to stop flow or reverse flow, reduce hydraulic impact.