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Home > Hy-Lok Fluid System Products > Valves > Double block and bleed valves
Double block and bleed valves

Double block and bleed valves, also known as DBB valves, are a space-saving dual isolation solution that reduces the need for costly multi-valve systems. By combining all block and bleed components into a single unit, Hy-Lok DBB valves minimize the risk of leak paths to atmosphere while providing significant weight savings.

Hy-Lok double block and bleed valves are integrally forged, one-piece assemblies used for the primary isolation of pressure take-off and process flow. A single Hy-Lok DBB valve can isolate up or downstream, providing a large maintenance advantage over multi-valves.

This compact design is ideal for instrument isolation chemical injection, gauge isolation, oil and gas production, and direct or remote mounting of instruments. Choose from a large inventory of ready-to-ship DBB valves, or allow us to custom design a solution that is optimized for your particular system.

DBB Valves and Oil & Gas Exploration

Double block and bleed valves are commonly used throughout the oil and gas extraction industry; especially on floating platforms and storage vessels where space is a primary concern. Hy-Lok DBB valves are highly flexible in design, and can be custom engineered to meet various lengths, heights, and connection sizes.

Hy-Lok double block and bleed valves can be produced using the same face-to-face dimensions as existing single block ball valves, eliminating the need to modify pipe systems. Double block and bleed valves are available in modular, monoflange, and root configurations, and can be fitted with optional one way check valves for chemical injection applications.

Hy-Lok Double Block and Bleed Valve Benefits

  • Compact design
  • Uninterrupted flow for negligible pressure drop
  • Reduced leakage points
  • Space, weight, and cost savings versus multi-valve systems
  • Reduced installation and maintenance requirements
  • Designed and engineered on a case-by-case basis
  • Compact profile for reduced risk of vibration damage
  • Optional features include probes, check valves, seat wipers, and injection quills
Browse the following Double Block and Bleed Valve PDFs for technical dimensions, temperature & pressure ratings, and ordering information:


Download Block and Bleed Valve PDF Download Modular Valves PDF
Download Monoflange Valves PDF
Download Sampling Valves PDF
Download Chemical Injection Valves PDF
Download Root Valves PDF

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