DAUBLE BLOCK & BLEED PLUG VAVLE (DBBV)

  • Supported development of the dual-expanding slip system capable of delivering 100% mechanical upstream and downstream isolation in a single valve.
  • Improved slip expansion/retraction geometry to reduce seat wear, avoid galling, and maintain consistent sealing over thousands of cycles.
  • Addressed complex alignment requirements of the plug, bushings, and dovetail mechanism to ensure symmetric sealing forces and prevent seal deformation.
  • Designed safe cavity-bleed, venting, and thermal-relief paths to support critical isolation in hydrocarbon, chemical, and high-pressure applications.
  • Reduced installation footprint by replacing traditional two-valve DBB configurations with a compact DBBV solution, improving safety and reliability.
  • Ensured material compatibility and long-lasting sealing performance in corrosive, abrasive, or high-temperature applications.

Size:                              1“ ~ 36“ (DN25 ~ DN900) / up to 72“ (DN1800) on request

Bore:                              Full or Reduced (Full bore is piggable)

Pressure:                      150# ~ 2500# (PN20 ~ PN420)

Directionality:            Uni or Bi-directional

Temperature range: -196°C ~ 250°C

Design:                          API 6D, ASME B16.34, AD2000

Face to Face Dim:       API 6D, ASME B16.10

Valve Ends:                   ASME B16.5, B16.25, B16.47

Fire Safe:                       ISO 10497, API 6FA, BS 6755

Fugitive Emission:     ISO 15848, TÜV, Shell MESC SPE 77-312

Testing:                          API 598, API 6D, ISO 5208, FCI

Topworks:                     ISO 5210