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