Double Block & Bleed Valves

Flowlink Valves & Controls offers precision-engineered Double Block and Bleed (DBB) valves, designed to ensure maximum safety, efficiency, and compactness in industrial applications. Built for critical operations, these valves are manufactured using robust materials like AISI 316L, Duplex, Super Duplex, or exotic alloys such as Inconel 625, providing unmatched durability under extreme pressures and temperatures. With a single-block construction and options for dual isolation and single bleed, these valves minimize space usage while enhancing safety in operations. They are ideal for sectors such as Oil & Gas, petrochemical, LNG, and hydrogen industries.

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Technical Specifications

Connections

  • From ½” to 6″
  • Threaded (NPT/BSP)
  • Flanged (ASME Class 150–2500)
  • Welded (BW/SW)
  • Hub Type

Rating

  • ASME Class: 150 lb to 2500 lb
  • API: 3000/5000/10000/15000

Design

  • Single or Double Block and Bleed (SB, SBB, DB, DBB)
  • Integral ball design with soft or metal seating options

Bonnet Options

  • Screwed Bonnet
  • Bolted O.S. & Y. Design
  • Anti-tamper with extended locking device
  • Suitable for cryogenic services

Material Construction

  • Valve Body: AISI 316L, Duplex, Super Duplex, Hastelloy, Inconel, Monel
  • Sealing Elements: PTFE, PEEK, or Graphite

Temperature Range

  • Operational between -196°C to +450°C

Pressure Ratings

  • Handles up to 15,000 psi (API 15K)

Fire-Safe Design

  • Compliant with API 607 and ISO 10497 standards

Compliance

  • Meets API 6D, ASME B16.34, and NACE MR0175 requirements

Applications

  • Used in refineries, chemical plants, LNG facilities, power generation, and offshore platforms for critical operations.

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