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TESCOM™ Anderson Greenwood Instrumentation Models F29/F33K Primary Isolation
Models F29/F33K Primary Isolation
Integrally forged, one piece double block and bleed Keyblok assemblies for primary isolation of pressure take-offs, where the valve is mounted directly to the vessel or process pipe


  • One-piece forged body combines a compact design with strength and reduced potential leak paths compared to conventional designs.
  • Flanged inlet connections available in a choice of sizes and ratings to suit each application.
  • Heavy duty needle type globe valve ensures bubble-tight shut-off on venting or isolation service.
  • Outside screw and yoke (OS&Y) needle type globe valve with investment cast yoke and bolted bonnet provides high mechanical strength and reliability on primary isolation service.
  • Bolt-on outlet option allows choice of connections for dual instrument mounting, welded connections and chemical injection.
  • Firesafe design to meet API 607, BS6755 Part 2 (optional).


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