A Double Block and Bleed (DBB) valve is a specialized type of valve designed to provide a superior level of isolation and safety in fluid control systems. Essentially, it combines the functions of two separate …

According to API, a DBB valve is 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 …

Aug 11, 2025 · Learn how double block and bleed valves work, their types, benefits, and selection tips to ensure safe, leak-free isolation in industrial applications.

“A double block and bleed valve is a single valve with two seating surfaces that, when in the closed position, provides a seal against pressure from both ends of the valve, with a means of venting or …

All Double Block & Bleed valves are designed in accordance with ASME B16.34 and where applicable with API 6D or BS EN ISO 17292. The BFE family of Double Block & Bleed valves provides positive …

May 15, 2025 · A Double Block and Bleed Ball Valve is an expert valve mechanism intended to facilitate a safe closure from both directions (upstream and downstream) of a pipeline. It incorporates two …

Jun 13, 2025 · What is a Double Block and Bleed Valve? A Double Block and Bleed Valve is a specially designed valve system that provides positive isolation by integrating two separate sealing surfaces …

May 9, 2023 · Double block and bleed valve (DBB valve) refer to two individual block valves linked together with a bleed valve in between, used to check for leakage. These valves use two seating …

Nov 10, 2025 · What does “Double Block and Bleed” (DBB) actually mean? It means a single valve assembly that provides two independent “blocks” (sealing points) and one “bleed” (a vent/drain) to …

Double block and bleed valves might sound like a martial arts technique, but in the world of industrial fluid systems, they play a crucial role in safety and efficiency. These valves are designed to isolate …