NSW Fully Welded Trunnion Ball Valve – Class 600, A105 Body, Butt Weld Ends

The NSW Fully Welded Trunnion Ball Valve is engineered for high-integrity flow control in demanding pipeline applications such as natural gas, oil, and petrochemical systems. With a forged steel three-piece body welded into a single integral structure, this valve offers zero leakage paths and long-term durability, even under buried or subsea conditions.

Manufactured to API 6D standards, this valve is equipped with a trunnion-mounted ball to reduce operating torque and ensure precise sealing performance. The full bore design minimizes pressure drop, while features like anti-blowout stem, anti-static device, emergency sealant injection (6” and above), and DBB (Double Block & Bleed) provide enhanced safety and functionality. Optional cryogenic or high-temperature extended stem designs are also available.

Available in butt weld, socket weld, or flanged ends per ASME standards, this valve is tested to API 598 and certified for fire-safe operation to API 6FA/607. NACE MR-0175/MR-0103 compliance makes it suitable for sour service applications.

Specifications:

– Valve Type: Trunnion-Mounted Fully Welded Ball Valve
– Operation: Manual, Electric, Pneumatic (Optional)
– Size Range: ½″ to 40″ (DN15 to DN1000)
– Pressure Class: 150#, 300#, 600# (1.6 MPa – 4.0 MPa)
– Body Material: Forged or Cast Steel (A105, WCB, F11, F22, F304, F316, CF8, CF8M, WCC)
– Ball Type: Trunnion-mounted, Full or Reduced Bore
– End Connections:
 • Butt Weld Ends to ASME B16.25
 • Socket Weld Ends to ASME B16.11
 • Optional Flange Ends to ASME B16.5/B16.47
– Face-to-Face: API 6D, ASME B16.10
– Design Standards: API 6D, API 608, ISO 17292
– Fire Safe Design: API 6FA / API 607
– Test & Inspection: API 598
– Special Features:
 • Double Block & Bleed (DBB), DIB (Double Isolation & Bleed)
 • Emergency seat and stem injection (6″ and above)
 • Vent valve for depressurization (6″ and above)
 • Lifting lugs and support feet (8″ and above)
 • Anti-static device, anti-blowout stem
 • Extended stem for cryogenic/high-temp service
 • Corrosion and sulfide stress resistance
 • Welded-in transition pipe ends
– Compliance:
 • NACE MR-0175 / MR-0103
 • ISO 15848 (Fugitive Emissions)
 • Non-Destructive Testing: PMI, UT, RT, PT, MT
– Applications: Natural gas transmission, underground gas lines, oil pipelines, chemical plants, LNG systems