Forged Steel Pressure Seal Gate Valve

For gate valve with pressure Class 600 / PN100 or higher, Pressure seal bonnet is suggested for better closure, 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 Forged Steel Pressure Seal Gate Valve:
Outside Screw & Yoke
Solid wedge
Full port or conventional port
Pressure Seal Bonnet
Socket Weld (SW), Butt Weld (BW), Threaded End Available

Applicable standards of Forged Steel Pressure Seal Gate Valve:
a) Design & Manufacture: API 602, BS 5352, ASME B16.34
b) Face to Face: ASME B16.10, EN 558
c) Connection End: ASME B1.20.1, ASME B16.11, ASME B16.25, ASME B16.5, EN 1092
d) Test and Inspection : API598, EN 12266

Sizes: 1/2" - 2" or DN12 - DN50
Pressure Rating: Class 150 - Class 2500 or PN 16 - PN 420
Material of valve body: A105, LF2, F11, F22, F5, F304, F304L, F316, F316L, etc.
Operated by: Handwheel