Lift Check Valve Pressure Seal 'Y' Pattern - ASME | Valvosider

Valvosider ASME Pressure Seal Y-Type Piston Check Valve

Y-pattern piston check valve for high-pressure ASME piping systems. The valve features a pressure seal bonnet, lapped disc/seat, and integral seat design. Operation is automatic, utilizing differential pressure and spring return; no actuator is required.

Class Ratings / Sizes

• Class 600: 2"–16", Fig. P82PC
• Class 900: 2"–16", Fig. P83PC
• Class 1500: 2"–12", Fig. P84PC
• Class 2500: 2"–12", Fig. P85PC

Materials and Trim

Available body/bonnet materials: WCB, WC1, WC6, WC9, CF8M. Disc-seat surfaces: A105+HF, F6A+HF, or A182 F316+HF, depending on configuration. Gasket: stainless steel with graphite. Bolting: B7/B16/B8. Spring: F316. Optional seat overlays: Stellite, Monel, Hastelloy, or other alloys.

Connections and Standards

Face-to-face: ASME B16.10. Flanges: ASME B16.5. Butt-weld ends: ASME B16.25. Design: 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

PTFE or rubber disc, renewable seat, drain plug, bypass, flanged ends, RTJ flanges, DIN connections available.

Typical Applications

Suitable for high-pressure steam, boiler feedwater, condensate, thermal fluids, and compatible process liquids or gases. Selection of class, body material, and trim should be based on pressure-temperature rating, corrosion resistance, and minimum opening flow.

FAQ

When is Y-pattern selected? Used where pressure seal lift check with angled flow and bonnet access is required.
Is an actuator needed? No. Operation is automatic via flow and spring return.