Double Block And Bleed Valves

  • Compact Design Ball Needle Ball Configuration

  • Forged Single Piece and Two/Three Piece Bolted Design Options

  • Fire Safe as per API 6FA

  • Anti-Blow-Out Ball Tip Stem design as Standard of Vent Needle Valves

Valve Body Construction
  • Single, Two and Three Piece Screwed and Bolted Design

Ball Design Construction
  • Floating and Trunnion mounted

End Connection Variants
  • Flange x Flange, Flange x Threaded

  • Flange Variants – RF and RTJ

End Connections
  • NPT, BSPT and Flanged as Standard

Size range
  • 1/2” to 2” and 12mm to 50mm Flange

  • End and Male/Female Threaded Pipe End Connections

Bore/Port Options
  • Reduced and Full Bore options

Operating Pressure Range
  • Class150 to Class 4500

Gland Seal Materials
  • PTFE, RPTFE as Standard for Bleed Needle Valve and Ball Valve Stem

  • Graphite on request in High Temperature Applications

Ball Valve Seat Materials
  • PTFE as Standard up to 200°C

  • Graphite for temperatures up to 640°C

Design Standards

- Shell Design

  • In Accordance with ASME B16.34

- Flange

  • In Accordance with ASME B16.5(RF/RTJ)

- Threads

  • ANSI B1.20.1

- Pressure Test

  • ASME B16.34, API 6D

  • Fire Safe as per API 607

  • Oil & Gas

  • Chemical & Petrochemical

  • Power Generation

  • Food & Beverage

Note: -As a drive for continuous improvements of our products, Thomas & Brian® reserves the right to change the descriptions contained in this brochure without prior notice. Consult local Agent or Factory for revisions and/or service related issues.