H61Y High Pressure Power Plant Piston Check Valve

The H61Y series forged steel lift check valve is a robust, self-actuating safety component engineered to prevent fluid backflow in high-temperature and high-pressure steam systems, boiler feedlines, and thermal process piping. Forged from high-grade carbon steel (A105), its compact square-body design eliminates structural casting vulnerabilities. The internal piston lift mechanism responds quickly to flow changes, offering tight sealing under reverse pressure while providing low flow resistance during normal unidirectional power station operations.

Technical Specifications

• Model System: H61Y Series

• Valve Mechanism: Lift Type / Piston Non-Return Action

• Nominal Diameter: DN65

• Pressure Rating: High Pressure Series (e.g., 250A / Class 1500)

• Body Material Grade: A105 Forged Carbon Steel / High-Temp Alloy Steel

• Manufacturing Craft: Integrated Free Forged Body

• Connection Profile: Butt Welded Ends (BW)

• Design Guideline: ASME B16.34 / BS 1868 / JB/T 3595

• Seat & Disc Armoring: Overlaid with Cobalt-Based Stellite Hard Alloy

• Flow Geometry: Inline Straight-Through Square Body Structure

• Bonnet Joint Configuration: Welded Bonnet or Threaded Cap Sealing

• Function Category: Automatic Backflow Prevention / Directional Control

• Primary Service Medium: Superheated Steam, High-Temperature Boiler Feed Water

• Target Industrial Application: Power Plant Piping Systems, Petrochemical Refining

• Thermal Management: Optimized for Frequent Elevated Thermal Cycling

• Pressure Test Standard: Hydrostatic Shell and High-Pressure Closure Tested

• Seat Structure: Integral Hard-Faced Welded Seat Ring

• Flow Directionality: Strict Unidirectional Flow (Indicated by permanent cast arrow)

• Surface Presentation: Industrial Matte Gray Heat-Resistant Protective Finish

• Logistics Security: Beveled Welded Ends Fitted with Sturdy Plastic Caps

• Data Traceability: Permanently Stamped with Size, Rating, Material, and Heat Number