Trunnion mounted twin Ball DBB valve has a single body design with double balls with a bleed valve (normally we use a needle valve or globe valve) installed between the pipeline. Twin Ball DBB valves are available bi-directional in metal seated and soft seated style, in bubble tight shut off. Sometimes we also called twin ball valves or twin DBB valves. These DBB design valves replace existing traditional techniques employed by pipeline engineers to generate a double block and bleed configuration in the pipeline.
Main features for trunnion mounted twin Ball DBB valve:
- Structure: Two balls (as block valve) with a needle or globe valve (bleed valve)
- Design & manufacture standard: API 6D/ISO 14313
Integral body or split body upon request
Floating ball and trunnion mounted ball
Soft seated or metal seated as request
- End connection: NPT or Flange
- Bore:Full bore or reduced bore
Fire safe design
Anti-static device
Material Specifications
- Body/Cap: A105, A350 LF2, A182 F304, F316, F304L, F316L, F51, F53
- Ball: A105+ENP, LF2+ENP, A182 F304, A182 F316, A182 F304L, A182 F316L, A182 F6a, F51, F53
- Stem/Trunnion: A105+ENP, A350 LF2+ENP, A182 F304, A182 F316, A182 F304L, A182 F316L, A182 F6a, F51, F53
- Seat Retainer: A105+ENP, A350 LF2+ENP, A182 F304, A182 F316, A182 F304L, A182 F316L, A182 F6a, F51, F53
- Seal ring: PTFE / RPTFE / NYLON / DEVLON / PEEK / metal to metal