FCT Double Block and Bleed Valve

FCT Double Block and Bleed Valve

FCT Double Block and Bleed Valve – Safe Isolation, Compact Design

FCT double block and bleed valves (DBB) integrate two isolation valves and one bleed valve into a single compact assembly. This configuration allows for simultaneous upstream and downstream isolation while safely venting the cavity between them, ensuring system integrity and safety during maintenance or shutdown.

These valves are ideal for oil and gas, petrochemical, refining, and offshore applications where space is limited and operational safety is critical.

Technical Specifications

  • Design Standard: API 6D, ASME B16.34, ISO 14313

  • Size Range: ½” to 24” (DN15 to DN600)

  • Pressure Rating: ANSI 150 to 2500, PN 10 to 420

  • Valve Types: Ball, Plug, Needle, Gate (configurable)

  • Body Type: Forged or cast, single or split body

  • Materials: Carbon Steel, Stainless Steel, Duplex, Inconel

  • Seats: Soft or Metal-to-Metal

  • Leakage Class: Class VI or Zero-Leakage

  • Bleed Port: Integral Needle Valve or Ball Valve

  • Temperature Range: -46°C to +200°C

  • Fire Safe Design: API 607 / ISO 10497

Key Features

  • Two isolation valves + one bleed in a single body

  • Reduces weight, space, and potential leak paths

  • Ideal for ESD, transmitter calibration, and maintenance bypass

  • Available in floating or trunnion ball configurations

  • Meets SIL and PED requirements for high-integrity applications

  • Custom bleed arrangements and drain options available

Applications

  • Instrumentation isolation

  • ESD valve systems

  • Chemical injection and sampling

  • Pressure transmitter calibration

  • Offshore platforms and FPSOs

  • Pipeline and tank farm shut-down systems