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Ball valve

Double Block And Bleed Ball Valve

DBB Double Block and Bleed Ball Valves have been solving many fluid control problems in water, potable water and general industrial applications for over 30 years. Today TANA Technologies is putting that experience to work for you in more ways than ever before-meeting your changing requirements with dependable TANA D.B.B Ball Valves and accessories. TANA D.B.B Ball Valves are Designed and manufactured strictly to International Standards API 6D, ASME B16.34, BS 5351 or Equivalent, Featured with compact structure & Tight Shut-off service, Designed with Fire-safe, Anti-static and Blow-out, Available in both Full and regular ports.

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DBB Double Block and Bleed Ball Valves have been solving many fluid control problems in water, potable water and general industrial applications for over 30 years. Today TANA Technologies is putting that experience to work for you in more ways than ever before-meeting your changing requirements with dependable TANA D.B.B Ball Valves and accessories. TANA D.B.B Ball Valves are Designed and manufactured strictly to International Standards API 6D, ASME B16.34, BS 5351 or Equivalent, Featured with compact structure & Tight Shut-off service, Designed with Fire-safe, Anti-static and Blow-out, Available in both Full and regular ports.


Double Block and Bleed valves assure double isolation function thanks to two obturator inserted in a single body and they provide the bleed function by means of a bleed/vent system located btween obturators(body port and ball,gate or needle valve),from the floating ball valve design,TANA DBB valves with several different constructions.

>Double fixed balls hinge on supports,and floating metal or soft seats,central needle vent valve
>Size Range : 1/2"~2",large sizes on request
>Pressure:ASME Class 150 ~ ASME Class 2500
>Temperature Range:-46~450℃
>Side Entry Forged Steel Valves
>On request,Top-Entry design
>Low pressure loss through the valve
>Low  actuation torque
>"CE"marking in compliance with PED Directive 97/23/EC
>Full bore or Reduce bore
>Different kinds of ends connections(RF/RTJ)Flanges,Butt weld,Clamp Connection,Socket Welding.
>Wide availability of materials sepending on the specifications(carbon steel,stainless steel or Duplex steel for service in corrosive      environments,Chrome-Molybdenum alloy steel for high temperature service,etc.
>Materials with anti-corrosion properties according to NACE MR 0175
>On request,seat pocket area overlay,seal area overlay,or completed cladding on wetted surface(welded overlays in inconel  625,Stainless steel 316 etc.,or Electroless Nickel Plating)
>Suitable for wrench or motorized actuation(hydraulic,pneumatic,gas-over-oil or electric actuator)

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