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DBB Trunnion Ball Valve


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No. 25, Building 26,
Modern Hardware & Electrical Market .
+ 86 189-639-45675
Double Block and Bleed Ball Valves are aimed to get a double barrier on the piping, and bleed the fluid trapped between the two balls from a dedicated drain line. Body construction can be either forging or centrifugal casting. Wide range of materials: carbon steels, austenitic or martensitic SS, duplex-superduplex SS, nickel-based alloys.

Valve design can be either Trunnion or Floating type, anti blow-out stem and typically SPE seat design. Drain port is normally provided with a floating ball valve, to be fitted with Final User drain line. Valve seats can be soft or metal to metal hard-faced.

Main reference codes:

  • Standard design in accordance with API 6D / ASME B16.34 / API 6A.
  • Antistatic design as per API 6D and ISO 17292.
  • Valve ends can be flanged (RF, FF, MF or FF, RTJ), according to ASME B16.5 (up to 24”) or ASME B16.47 (26” and above), Butt-Welding according to ASME B16.25, or Hub, according to customer Requirements.
  • Fire Safe according to BS6755 / API 6FA / API 607, since each sealing point is provided by a secondary fire-safe seal in graphite. Valve soft seats also are provided with secondary metal-to-metal seal in case of fire.

Ball Valve , Gate Valve , Check Valve , Globe Valve , Butterfly Valve , Plug Valve , DIN Valve , Gost Valve , Bellow Seal Valve , Stainless Steel Pipe , Stainless Steel Flange , Stainless Steel Fitting .

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Wuhan Furun Yang Valve Co., Ltd.

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