Double Block Trunnion DBB Flanged Ball Valve High Pressure

High Pressure Double Block Bleed A105N DBB Flange End Solid Ball Valve

TEKO dual expertise in gate/globe and check valve comes together in the development of modular DBB valves. Combining forged components valves for the usual needle bleed valve and the various options of the ball valve modules we offer valves size 1/4″ to 12″ in all pressure class and high-quality material for most demanding conditions.

Main Standard:

Description

Double block and bleed ball valve
Double fixed balls hinged on supports, and floating metal or soft seats.Central Needle Vent Valve
» Size Ranges from 1/2” through 12” , Large Sizes on request.
» Pressure Range: from ASME Class 150 to ASME Class 2500.
» Temperature range from-46 to 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 Reduced bore.
» Different kinds of end connections (RF/RTJ) Flanges, Butt Weld, Clamp Connection, Socket Welding).
» Wide availability of materials depending 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 manual (wrench of gear) or motorized actuation ( hydraulic, pneumatic, gas-over-oil or electric actuator).

Double Block and Bleed (DBB Valves)

These valves replace existing traditional techniques employed by pipeline engineers to generate a double block and bleed configuration in the pipeline. Two block valves and a bleed valve are as a unit, or manifold, to be installed for positive isolation. Used for critical process service, DBB valves are for high pressure systems or toxic/hazardous fluid processes. Applications that use DBB valves include instrument drain, chemical injection connection, chemical seal isolation, and gauge isolation. DBB valves do the work of three separate valves (2 isolations and 1 drain) and require less space and have less weight.