The 4-inch flange check valve is suitable for controlling the opening and closing of the pipeline medium under various pressures, temperatures and mediums. It can automatically prevent fluid back-flowing by relying on the valve weight and fluid pressure difference.
The flange check valve refers to a valve that automatically opens and closes the valve flap by means of the flow of the medium itself. It is used to prevent the backflow of the medium, which is also called a check valve, a reverse flow valve, and a back pressure valve. The check valve is an automatic valve whose main function is to prevent backflow of the medium, to prevent the pump and drive motor from reversing and to prevent from discharging the container medium. The check valve can also be used to supply replenishment to the auxiliary system of the system pressure. The 4-inch flange check valve is mainly divided into 4-inch swing check valve (rotation by gravity) and 4-inch lift check valve (moving along the axis).
The function of this type of valve is to only allow the medium to flow in one direction and only the direction. Usually, the valve is automatically operated, and the valve flap is opened by the fluid pressure flowing in one direction. When the fluid flows in the opposite direction, the fluid pressure and the self-reclosing valve flap of the valve act on the valve seat to cut off the flow.
Depending on the housing and sealing material, any working medium and any operating temperature range can be used. The cast steel swing-type flange check valve is suitable for water, steam, and gas. The lift flange check valve is suitable for water, Oil, gas, food, oil, medicine and many other conditions.
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