The monoflange double block and bleed isolation instrument valve is engineered to mount horizontal or vertical, directly on process flanges, helping provide maximum safety with minimal vibration impact.

API 6D defines a double-block-and-bleed valve (DBB) as a “single valve with two seating surfaces that, in the closed position, provides a seal against pressure from both ends of the valve with a means of venting/bleeding the cavity between the seating surfaces.”

all and needle valve designs used in these Double Block and Bleed valves and monoflanges. These designs meet the highest class ‘A’ level over the temperature range - 9°C to +180°C celsius, alongside the standard instrumentation.

The P2DBB double block and bleed valves are designed for use with various instrumentation equipment and can be installed to control, isolate, measure, calibrate, equalize, drain or vent the pressure of gases and liquids.

Bonney Forge manufactures Double Block and Bleed Valves ( DDB valve) in an extensive range of designs, materials, sizes, pressure classes and end connections that are designed in accordance to ASME B16.34 and where applicable API 6D or BS EN ISO 17292.

PANAM Double Block and Bleeds are generally used for instrumentation applications and are put in place to isolate pressure sensing instrumentation from, but not limited to: poisonous, flammable chemicals; super-heated steam; and vaporized hydrocarbons at elevated temperatures. These valves are available in a very wide range of configurations ...

Block and Bleed Valve’ range that are resistant to explosive decompression. CARBON STEEL DOUBLE BLOCK AND BLEED VALVES have stainless steel end adaptors, seal housings and inserts as standard construction. The parts mentioned can also be made from carbon steel if specifically requested. Plating as standard with painting options available.

Compact and one piece Instrument Double Block & Bleed (DBB) ball valves. Where compactness and a high specification for mechanical and piping applications are required, Imperial Valve offers a complete range of instrument double block and bleed valves (DBB’s) in …

Double Block & Bleed Valves DBB instrument valves offer improved safety with 2 isolation valves & a vent valve between the primary & secondary isolation valves. Available in different options such as all needle, Ball – Needle – Ball Threaded & Flanged connections.

Where compactness and a high specification for mechanical and piping applications is required, Controls Supply Chain offers a complete range of instrument double block and bleed valves (dbb’s) in accordance with ANSI/ASME B.16.34.