Pressure Seal Piston Check Valve

GAIRUI Forged Pressure Seal Piston Check Valves is a valve which is automatically opened and closed by the flow of the medium itself. It is used to prevent the reverse flow of the medium. It is also called the reverse check valve, the one-way valve, the countercurrent valve and the back pressure valve. The check valve is an automatic valve. Its main function is to prevent the backflow of the medium, prevent the reversing of the pump and drive motor, and the discharge of the container medium. The check valve can also be used to supply pipelines where the pressure may exceed the system pressure. The valve disc of the high pressure check valve is disc shaped and rotating around the seat channel. Because the valve channel is streamlined, the flow resistance is smaller than the butterfly check valve. It is suitable for large aperture with low flow velocity and unchangeable flow, but it is not suitable for pulsating flow and its sealing performance is not up to rise.

Standard specification.

Design and manufacture:API 602,BS 5352,ANSI B16.34.
Connection ends conform to:
    -Socket welded ends:ANSI B16.11.
    -(NPT threaded)Screw ends:ANSI B1.20.1.
    -Butt-welded ends:ANSI B 16.25.
    -Flanged ends:ANSI B 16.5.
Inspection & testing:API 598.
NACE MR 0175 on request
Tag: MSS SP 25.

Construction features.

Spring Loaded To Ensure That Even In The Low-Pressure Sealing Performance As Well.
Y pattern straight-through flow path,greatly reducing flow resistance.

Application.

For valves which size is smaller than 2"(DN50), forged steel valves are recommended. Compared with castings,forged valve offer the advantages of more uniform structure, greater density, higher strength integrity, enhanced dimensional characteristics and closer dimensional tolerances.Owing to so many advantageds,the forged valve can be widely used in the fields of petroleum,natural gas,chemical,power and other industries.