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  • Double Block and Bleed (DBB) Valves
  • Double Block and Bleed (DBB) Valves

Double Block and Bleed (DBB) Valves

Ball, Plug & Gate Designs for Superior Isolation

"Double Isolation. Safe Bleed. Trust Valve—DBB Reliability for Critical Systems."

INQUIRY
  • Key Features & Benefits
  • Product Range
  • Technical Specifications
  • Application Sectors

Valve Type

Core Features

Primary Benefits

DBB Ball Valves

Two full-port balls + central bleed port; 90° quarter-turn operation.

Fast isolation, low pressure drop, ideal for high-flow/hazardous media (hydrocarbons, chemicals).

DBB Plug Valves

Dual conical plugs with bleed channel; tight metal-to-metal sealing.

Excellent for abrasive slurries or viscous fluids (mining, oil sands); resists fouling.

DBB Gate Valves

Two parallel gates with intermediate bleed; linear motion.

Superior shutoff in high-pressure steam or heavy oil systems; minimal leakage in static service.

 

  • Key Features & Benefits
  • Product Range
  • Technical Specifications
  • Application Sectors

DBB Ball Valves

  • Sizes: NPS 1/2"–12" (DN 15–300); Pressures: 150–2500 Class (PN 20–420).
  • Materials: 316L stainless steel, carbon steel, Hastelloy® (corrosive service).
  • Applications: Oil & gas pipelines, chemical reactors, LNG systems.

DBB Plug Valves

  • Sizes: NPS 1"–10" (DN 25–250); Pressures: 150–1500 Class (PN 20–250).
  • Materials: Ductile iron, 316L with Stellite® trim (abrasive service).
  • Applications: Slurry lines, mining, wastewater treatment.

DBB Gate Valves

  • Sizes: NPS 2"–24" (DN 50–600); Pressures: 150–3000 Class (PN 20–500).
  • Materials: Carbon steel, alloy steel (high-temperature steam service).
  • Applications: Power plant boilers, refinery crude lines, heavy oil transport.
  • Key Features & Benefits
  • Product Range
  • Technical Specifications
  • Application Sectors
  • Pressure Ratings: 150–3000 Class (PN 20–500)
  • Temperature Ranges: -29°C to 650°C (material-dependent)
  • Sealing: API 598 Class VI (ball/plug); API 598 Class IV (gate)
  • Testing: API 6D (isolation), API 527 (bleed port), NACE MR0175 (sour service).
  • Key Features & Benefits
  • Product Range
  • Technical Specifications
  • Application Sectors
  • Oil & Gas: Wellhead control, pipeline isolation, pigging stations.
  • Chemicals: Reactor shutdown, corrosive fluid transfer, pressure vessel isolation.
  • Power: Steam line isolation, boiler feed systems, condensate handling.
  • Mining: Slurry pipeline shutdown, tailings management.
  • Marine: Fuel line isolation, ballast system safety shutdowns.