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TESCOM™ Anderson Greenwood Instrumentation Model HD29 Primary Isolation Valve
Model HD29 Primary Isolation Valve
An integral one-piece double block and bleed root valve assembly for primary isolation of pressure take-offs, with either threaded or welded inlet connection


  • One-piece forged body combines a compact design with strength and reduced potential leak paths compared to conventional designs.
  • Threaded or welded type connections.
  • Heavy duty needle type globe valves ensuring bubble-tight shut-off on isolation and venting services.
  • Firesafe design to meet API 607, BS6755 Part 2 (optional).