NSW Double Block and Bleed Ball Valve – Class 150–2500, Forged Trunnion, 3PC Body

The NSW Double Block and Bleed (DBB) Ball Valve is a high-integrity isolation solution designed for critical applications requiring zero leakage and enhanced safety. Engineered in a 3-piece trunnion-mounted configuration, this valve integrates two independently seated balls and a bleed valve into a compact body, enabling simultaneous double isolation and cavity bleed. Forged from materials such as A105, F304, F316, F51, and LF2, the valve body ensures strength and corrosion resistance in demanding environments. The full bore design minimizes pressure drop, while the split-body construction allows easier inline maintenance. Features such as blow-out proof stem, anti-static device, and fire-safe construction make this DBB valve ideal for use in process, oil & gas, and instrumentation systems where safety, reliability, and compact layout are paramount.

Specifications:

– Valve Type: Double Block and Bleed (DBB) Trunnion Ball Valve
– Size Range: NPS 2 to NPS 32
– Pressure Class: 150, 300, 600, 900, 1500, 2500
– Body Material: Forged Steel (A105, A182 F304/F304L, F316/F316L, F51, F53, A350 LF2/LF3/LF5)
– Body Design: 3-Piece, Split Body
– Ball Design: Trunnion-mounted
– Bore Type: Full Bore
– Operation: Manual (wrench/gear), pneumatic, or electric (per application)
– End Connections:
 • Flanged: ASME B16.5, B16.47, MSS SP-44 (NPS 22 only)
 • Socket Weld: ASME B16.11
 • Butt Weld: ASME B16.25
 • Threaded: ANSI/ASME B1.20.1
– Face-to-Face: ASME B16.10 / API 6D
– Design Standards: API 6D, API 608, ISO 17292
– Testing Standards: API 6D, API 598
– Fire Safe Compliance: API 6FA, API 607
– Optional Standards: NACE MR-0175 / MR-0103, ISO 15848
– Inspection Methods: PMI, UT, RT, PT, MT
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