Engineered for high-pressure severe piping loops, boiler feed lines, and refinery auxiliary vents. Fully compliant with API 602 and ASME B16.34, featuring solid forged bodies (A105, F316, F11, F22) in piston-lift, ball-check, and swing designs with zero backflow leakage.
| Design Standards | API 602, ASME B16.34, BS 5352 |
|---|---|
| Size & Pressure Scope | NPS 1/2" to 2" (DN 15 to 50); ASME Class 800, 1500, 2500 |
| Body Materials | ASTM A105, A182 F11, F22, F304, F316, F316L, F51 (Duplex), Inconel |
| Disc / Piston Trim | API Trim 8 (13Cr + Stellite), API Trim 5 (Full Stellite 6 Hardfacing), 316SS |
| Factory Pressure Test | 100% Tested per API 598 (Hydrostatic Shell, Hydrostatic Seat, High Pressure Gas) |

Heavy spring-assisted vertical piston disc providing fast anti-slam closure in pulsating gas and boiler loops.

Compact bolted bonnet swing disc minimizing flow turbulence and pressure loss in high-pressure piping skids.

One-piece forged flange body eliminating girth welds for offshore manifolds and sour gas service.
1:1 aligned with TSV factory catalog. Engineered non-return valves preventing backflow and water hammer in industrial piping.
API 594 compact wafer design with spring-loaded dual plates for rapid non-slam closure.
API 594 Non-Slam View Dual Plate Check Valve →Heavy bolted cover swing check valve providing full unobstructed bore for low pressure drop.
Full Bore Swing View Flanged Swing Check Valve →Ultra-thin short pattern wafer check valve easily sandwiched between ASME B16.5 flanges.
Short Pattern View Single Disc Wafer Check Valve →Class 800 - 2500 high-pressure forged piston lift check valve for boiler feed and pump discharge.
Current Series View Page Top ↑High-integrity threaded NPT/BSPT and socket weld check valves for chemical dosing skids and power packs.
Thread / SW View Threaded & Socket Weld Check Valve →Connect directly with our Yongjia engineering technical sales team. Receive technical engineering datasheets, CAD dimensional GA drawings, and quotation within 24 hours.