Instrument Double Block & Bleed Valves

Compact and one piece

Where compactness and a high specification for mechanical and piping applications is required, Imperial Valve offers a complete range of instrument double block and bleed valves (dbb’s) in accordance with ANSI/ASME B.16.34. Variations of these instrument double block and bleed valves include sampling and chemical injection double block and bleed valves.

Instrument DBB Valves

General features

  • Through bore ball-needle-ball configuration
  • Reduced and full bore sizes available
  • Flange x thread or flange x flange configurations
  • Sampling and chemical injection versions available
  • Handle locking option available
  • Fire tested in accordance with BS6755 part II

General specifications

  • Flange sizes ½″ up to 3″ available
  • Ratings: ANSI 150-2500 lbs
  • Materials: wide selection of materials for both body and internals: carbon steel, low alloy steels, stainless steels, Duplex, Ni-alloys and titanium.
  • Including NACE MR-01-75 (latest revision)

DBB valve flange x flangeFlange by Flange

  • Mainly used in “in-line” piping applications
  • Bore size from ⅜” up to 16″
  • One piece and/or three piece design
  • ASME B16,5, DIN and JIC flanges available

Downloads
Drawing:
instrument-dbb-flange-flange-drawing

DBB valve flange x threadFlange by Thread

  • Mainly used on process to instrument applications
  • Bore size from ⅜” up to 1″
  • One piece and/or three piece design
  • ASME B16,5, DIN and JIC flanges available
  • Instrument connections threaded, socket weld and butt weld available

Downloads
Drawing:
instrument-dbb-flange-thread-drawing

DBB valve thread x threadThread by Thread

  • Mainly used in high pressure well head panel applications
  • Bore size ⅜” up to 1″
  • One piece design only
  • Ball/needle ball and all ball options available

Downloads
Drawing:
instrument-dbb-thread-thread-drawing

Interested? Please contact us!

Our product specialist will be pleased to advise you about our products and solutions.