Our company offers a broad range of Cast Steel Pressure Seal Globe valves in Buttweld and Flanged end connections.
Size Range: 2″ ~ 24″
Pressure Class: 600~4500 LB
Style: Straight Pattern, Y-Pattern and Non-Return (Stop Check) design
Materials: A216 WCB, WC6, WC9, C5, C12, C12A, CF8M and special alloys
Standard Construction Features
Straight and Y-Pattern Seating Design
All Pressure Seal Globe Valves utilize a seating design that consist of a guided disc which seals fully with the seat to provide a tight seal. Seating surfaces are hardfaced with Stellite®6 to increase the life cycle.
All globe valves are unidirectional.
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 And Benefits
Spring-loaded discs are self-aligning and reduces actuator torque requirements
No wedging force; disc reacts freely to thermal changes
Positive disc travel stops cast into body for uniform seat wear and improved sealing
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