Instrumentation DBB Valves

Colson Valves manufactures a comprehensive range of instrument double block & bleed (DBB) valve solutions for critical isolation duties in high-pressure instrumentation systems. These compact, integrally forged assemblies provide two independent isolation barriers with a central bleed, delivering verifiable isolation in a single, space-efficient unit.

Our instrument DBB range includes the DFF, DFB and DBB series for standard applications, and the CX series (CX14, CX15, CX19, CX20) – a low-emission range developed specifically to meet Shell Specification 77/300 and ISO 15848 Part 1, and approved by Shell globally.

All instrument DBB valves are manufactured in-house at our Sheffield facility, with full EN10204 3.1 material traceability, rigorous pressure testing and compliance with internationally recognised standards supplied as standard.