PRODUCTSValve Products

Check Valve

Check Valve – Category Overview
Check valves are a key product line within our special alloy valve portfolio. We offer Swing Type, Dual Plate Wafer, Lift Type, and Nozzle Check Valves, with primary materials in stainless steel and special alloys, widely used in seawater, oil & gas, chemical, and power plant pipeline systems.

FAQ

Material Coverage

Stainless Series: CF8 / CF8M / 304 / 316L
Special Alloy Series: Hastelloy C276/B3, Inconel 625/718, Monel 400/K500, Titanium Gr.2/Gr.5, Nickel Aluminum Bronze C95800/C95500
Duplex Series: 2205 / 2507
Carbon Steel Series: WCB / LCC
Configurations: Swing Type / Dual Plate Wafer / Lift Type (Piston/Ball) / Axial Flow Nozzle
End Connections: Flanged / Butt Weld / Socket Weld / Wafer
Design Standards: API 6D, ASME B16.34, API 594, DIN, GOST, JIS

Standards & Certifications

Design: API 6D / ASME B16.34 / API 594
Testing: API 598
Certificates: API 6D, API 600, CE, EAC, ISO 9001
Applications: Seawater cooling, ballast water, firewater, oil & gas gathering, chemical process, power plant circulating water

Production Highlights

Disc and seat lapped in pairs for zero leakage (soft seal)
In-house torsion spring selection with 100,000 cycle service life verification
Precision controlled pin-to-disc clearance on swing type to prevent sticking
Nickel Aluminum Bronze and special alloy check valves specifically designed for seawater and high-corrosion service