Lift Check Valve Pressure Seal 'straight' - ASME | Valvosider

Valvosider ASME Pressure Seal – Straight Lift Check Valve

The Valvosider ASME Pressure Seal is a straight-pattern lift check valve designed for high-pressure lines. It features a pressure seal bonnet, lapped disc/seat, and integral seat construction. Disc lift is actuated by differential fluid pressure, with return provided by a spring. No actuator is required; operation is fully automatic.

Class Ratings & Sizes

• Class 600: 2"–16", Fig. P62PC
• Class 900: 2"–16", Fig. P63PC
• Class 1500: 2"–12", Fig. P64PC
• Class 2500: 2"–12", Fig. P65PC

Materials & Trim

Available body/bonnet materials: WCB, WC1, WC6, WC9, CF8M. Disc-seat surfaces are hard-faced; trims include A105, F6A, or A182 F316. Gasket is stainless steel reinforced with graphite. Bolting: B7/B16/B8. Spring: F316. Optional overlays: Stellite, Monel, Hastelloy, or other alloys for wear/corrosion resistance.

Connections & Standards

Available in RF/BW and RTJ ends. Face-to-face per ASME B16.10, flanges per ASME B16.5, welding ends per ASME B16.25. Design references: MSS SP 144, BS 1873, ASME B16.34. Testing: API 598, EN 12266. Marking: MSS-SP 25. Compliance: CE/PED. Certification: EN 10204 3.1 / 3.2.

Options

• Disc with PTFE or elastomer
• Renewable seat
• Drain plug
• Bypass
• Flanged ends
• RTJ flanges
• DIN connections

Typical Applications

Used in high-pressure steam, boiler feedwater, condensate, thermal fluids, and compatible process liquids or gases. Selection of class and material should be based on pressure-temperature rating, fluid properties, corrosion, and minimum flow to ensure stable disc lift.

FAQ

When is pressure seal selected? For high ASME classes where bonnet sealing must withstand elevated internal pressure.
Is an actuator required? No. Operation is automatic via flow and spring return.