Pressure Seal Globe 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 Globe Valves:

Straight Pattern Body Design
Swivel Plug Disc Design Standard
Flat and Regulating Type Disc Available
Pressure Seal Bonnet
OS&Y, Rising Stem and Handwheel
Flanged or Butt-welding Ends
Gear or Actuator Available

Applicable Standards of Pressure Seal Globe Valves:
a) Design&Manufacture: BS 1873, ASME B16.34
b) Face to Face: ASME B16.10, EN 558, BS2080
c) Connection End: ASME B16.5, ASME B16.25, EN 1092
d) Test and Inspection: API 598, EN 12266, BS 6755

Sizes: 1/2" - 12" or DN12 - DN300
Pressure Rating: Class150 - Class2500 or PN16 - PN420
Materials of Valve Body: WCB, LCB, WC6, WC9, C12, C5, CF8, CF3, CF3M, CF8M, etc.
Operated by: Handwheel, Gear, Pneumatic, hydraulic and Electric actuator.

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