Double Block And Bleed Valves

FEATURES
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
TECHNICAL SPECIFICATIONS
Valve Body Construction
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Single, Two and Three Piece Screwed and Bolted Design
Ball Design Construction
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Floating and Trunnion mounted
End Connection Variants
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Flange x Flange, Flange x Threaded
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Flange Variants – RF and RTJ
End Connections
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NPT, BSPT and Flanged as Standard
Size range
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1/2” to 2” and 12mm to 50mm Flange
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End and Male/Female Threaded Pipe End Connections
Bore/Port Options
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Reduced and Full Bore options
Operating Pressure Range
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Class150 to Class 4500
Gland Seal Materials
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PTFE, RPTFE as Standard for Bleed Needle Valve and Ball Valve Stem
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Graphite on request in High Temperature Applications
Ball Valve Seat Materials
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PTFE as Standard up to 200°C
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Graphite for temperatures up to 640°C
Design Standards
- Shell Design
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In Accordance with ASME B16.34
- Flange
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In Accordance with ASME B16.5(RF/RTJ)
- Threads
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ANSI B1.20.1
- Pressure Test
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ASME B16.34, API 6D
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Fire Safe as per API 607
INDUSTRIES
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.