Modular Double Block and Bleed Valve size 4 inch - VELAN ABV

Modular Double Block and Bleed Valve size 4 inch - VELAN ABV

Velan ABV modular double block and bleed valves combine two in-line isolation valves into a single body with an additional bleed valve used to drain or vent trapped fluid between the two obturators. This design significantly reduces potential atmospheric leakage, minimizing any hazardous risk when transferring liquids or gas–offering the highest level of safety in double isolation and bleed service.

Specifications :

• Valve design : As per API 6D or API 6A or API 6DSS standards and customer requirements.
• Temperature range : -150 to 662°F (-101 to 350°C)
• Face-to-face : As per Velan standard
• End connections : RF, RTJ as per B16.5 &B16.47; BW, Butt Weld as per B16.25; Hub connection; 6B, 6BX as per API6A

Design features :

• Double block and bleed design (DBB).
• Secondary seals in pure Graphite.
• Anti-static device.
• Anti-blowout stem.
• Soft-seated or metal-seated designs with hardfacing on ball and seats. 
• Seat configurations available: four self-relieving, four double piston, or combination.
• O-ring/lip seal configuration.
• Emergency sealant injection on seats and stem available.
• Low fugitive emission stem packing available.
• CRA overlay on all dynamic sealing areas or on all wetted parts available. 
• Extended bonnet for low & high temperature available.
• Low pressure loss through the valve. 
• BTC series: extremely compact valve design as per high pressure compact ball valves.