API 6A Check Valve

API 6A check valve, high-pressure, high-reliability non-return valve

– Types:

– Swing Check Valve (flapper/clapper hinged, gravity/flow se open/close.

– Lift/Piston Check Valve.

– Type R Check Valve.

– Flapper Type or Top Entry check valve.

– Sizes: 2-1/16″, 2-9/16″,

– Pressure Ratings: 2000 PSI se 15,000 PSI.

– Material Classes: AA to HH (sweet to severe sour/H2S service, NACE compliant).

– Temperature Ratings: K to V/X/Y (low -75°C se high 350°C+, Annex G for extreme).

– PSL (Product Specification Level): PSL-1 to PSL-3.

– PR (Performance Requirement): PR1.

– Sealing: Metal-to-metal (elastomer-free for high-temp/H2S), ring joint flanges (RTJ), integral forged body.

– Installation: Horizontal/vertical (flow direction marked),