Pressure Seal Swing Check Valve

Pressure Seal Swing Check Valve


Pressure seal bonnet is suggested for better closure in high pressure condition, while bolted bonnet is still available for customer's option.


The pressure seal design incorporates a metal-to-metal seal that becomes tighter as the pressure increases. The initial preload deforms the taper on the soft iron gasket to mate with the taper on the bonnet. The thin knife-edge on the gasket is wedged tightly between the body and the bonnet. The shallow angle insures that the gasket is sealed tightly with only a small upward force on the bonnet. Once the initial seal is created, the body/bonnet joint will remain leak free regardless of thermal or pressure conditions in the valve. After the joint has been assembled, there is no further need to adjust bonnet cap screws.






Features of Pressure Seal Swing Check Valves:

Swing Disc Design

Pressure Seal Cover

Internal Hinge Pin Design Standard

Through-body Hinge Pin Design Available

Flanged or Butt-welding Ends

Extra Lever, Counter Weight and Damper Available

Applicable Standards of Pressure Seal Swing Check Valves:

a) Design&Manufacture:API 6D, BS 1868, ASME B16.34

b) Face to Face: API 6D, ASME B16.10, EN 558

c) Connection End: ASME B16.5, ASME B16.25, EN 1092, JIS B2220

d) Test and Inspection: API 6D, EN 12266, API 598, BS 6755

Sizes: 2" - 36" or DN50 - DN900

Pressure Rating: Class150 - Class2500 or PN16 - PN420

Material of Valve Body: WCB, LCB, WC6, WC9, C12, C5, CF8, CF3, CF3M, CF8M, etc.

Contact us if you need more details on API Pressure Seal Swing Check Valve. We are ready to answer your questions on packaging, logistics, certification or any other aspects about DIN Pressure Seal Swing Check Valve、Pressure Seal Swing Check Valve. If these products fail to match your need, please contact us and we would like to provide relevant information.

Product Categories : Check Valve > Swing Type Check Valve