Instrument Double Block & Bleed Valves
Compact and one piece
Where compactness and a high specification for mechanical and piping applications is required, we offer 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.
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)
Flange 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
Flange 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
Thread 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