DBB Plug Valves

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DBB Plug Valves


Double Block & Bleed Plug Valves

Size 2" to 42" (50 mm to 1050 mm)
ASME Class Class 150 to 600
Design Standard API 6D

Beyond Standards:

  • Design complies to API 6D
  • Valves offered with API 6D monogram
  • Fugitive emissions – Complies to ISO 15848-1
  • Fire safety - Complies to API 607/ ISO 10497
  • CE Marking - Meets requirements of Pressure Equipment Directive 2014/68/EU, Annexure III, Module H
  • PED Module B1 Design examination certificate (certified by DNV) available
  • Atex - Meets requirements of Atex Directive 94/9/EC (ATEX), category 2 non-electrical equipment
  • SIL3 - Safety Integrity Level SIL3 certification complies to IEC 61508

Features that Add Value:

  • L&T Valves Double Block & Bleed Plug Valve provides online-verifiable bubble tight sealing and is a safe and reliable replacement to the conventional two-valve system
  • High integrity positive shut-off obtained independent of line pressure, without sealants/ lubricants
  • Mechanical sealing ensuring online-verifiable positive double isolation for critical services
  • Patented operator mechanism enables segments to move towards the seats during valve operation – reduces wear and tear and enhances service life
  • Inbuilt cavity pressure relief system
  • Inline Maintainable Seats -Seats can be renewed without removing the valve from the pipeline (after draining and isolating the line)

Versatile Solutions:

  • Options: High Temperature, Cryogenic, FBE-lined, Steam-jacketed valves
  • ValvTrac™ RFID tags for reliable digital traceability