• API 602 piston check valve

Name:API 602 piston check valve
Size Range:1/2" - 2"
Design Standard:API 602 (ISO15761)
End Connection:NPT, SW, RF , ASME B1.20.1 , ASME B16.11
Test Standard:API 598
Suitable medium:Petroleum, Gas, Steam
Body Materials:A105, F11, F22, F5, F304, F316

Product Description


  1. Piston styple check valves for horizontal and vertical pipeline applications

  2. The disc is hardened, ground and lapped

  3. The integral seat hardfacing is overlaid directly onto the body base material, eliminating any possibility of leakage behind the seat (trim 8)

  4. Complies with API 602 and ASME B16.34

  5. Body cover joint: metal-to-metal surface contact for automatic gasket compression and elimination of flange overstressing.

  6. High strength bolting: extra heavy hex head bolts use standard tools for easy maintenance

  7. Forged body and cover: in full accordance with ASME boiler and pressure vessel code - section 1 design and material requirements

  8. Top entry design: allows for complete valve maintenance without removal from the line

  9. Hardened disc: precision guided on cover centerpost. Flat seat design ensures positive alignment of seating surfaces, regardless of valve's installed position, and absorbs sudden closure impact

  10. Graphite filled gasket: spiral wound, stainless steel, graphite filled, with controlled compression for zero leakage at maximum design pressure and temperature

  11. Hard faced seat: all hardfacing is overlaid to extra depth, to ensure maximum repairability. 

  12. Full code compliance: complies with ASME B16.34

  13. Center guided disc: keeps disc from misalignment and/or binding

  14. Built in relief port: allows rapid evacuation of line fluid from disc cavity

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