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API 6D Double Block and Bleed Valves

FZV produces double block and bleed (DBBV) valves that are designed to replace the complex form of multiple valve connections in traditional pipeline applications. The FZV DBBV has similar characteristics to the conventional ball valves, such as limited fluid resistance, short opening and closing time, anti-blowout proof stem, fire-safe design, anti-static design, emergency grease injection ports for both stem and seat.

Design Features

Available in both floating or trunnion mounted designs, the FZV DBBV uses either a side entry integral or three-piece body configuration.

FZV DBBV valves are widely used in oil and gas, chemical, power, food, pharmaceutical, and other industries.


  • NPS 1/2 to 6 (floating ball)
  • NPS 2 to 16 (trunnion ball)
  • Class range from 150 to 1500


Design Standards

  • API 6D
  • ISO 17292
  • API 608
  • ASME B16.34


  • FZV Standard

End Connection

  • ASME B16.5
  • HG20592-20615
  • ASME B16.25

Inspection and Testing

  • API 598
  • ISO 5208
  • API 6D
  • API 607
  • API 6FA