SBB Single Block and Bleed Ball Valves

SBB Single Block and Bleed Ball Valves

Description:
VALVE DESIGN: based on API 6D and Customer requirements
TEMPERATURE RANGE: -150 to 662°F (-101 to 350°C)
SIZE: NPS 2-56 (DN 50-1400)
PRESSURE RATING:ASME 150 - ASME 2500
FACE-TO-FAC::As per API 6D standard
END CONNECTIONS: RF, RTJ as per B16.5 &B16.47; BW, Butt Welded as per B16.25; SW, Socket Welded as per B16.11 Hub connection
BODY DESIGN: Forged bolted two-piece and three-piece
SEAT DESIGN: Soft or metal seated with Hardfacing on ball and seats; Self relieving seats; Double piston seats; Combination seats; Interchangeable seats

SBB Single Block and Bleed Ball Valves

Single block and bleed valves are used to achieve positive isolation when performing maintenance activities in a live process plant. Typically one block valve and a bleed valve are manufactured as a single assembly and this block and bleed valve manifold can be readily installed for isolation purpose.

Single block and bleed valves are usually used for non-critical process service, such as low pressure system or non toxic, non hydrocarbon, non-hazardous process fluids. For critical service, double block and bleed valve assemblies must be used.

Block and bleed valves are also often used with spectacle blind or blind spacers to provide positive isolation. Block and bleed valve assemblies allow fewer potential leakage paths compared to traditional separate installations of individual valves, thus increasing safety of the design.

SBB valves are tested according to API 598 testing procedure and the testing include the bleed functionality. In case of API DBB valves, PR type testing and production testing up to PSL3G are available.

Description:

VALVE DESIGN: based on API 6D and Customer requirements
TEMPERATURE RANGE: -150 to 662°F (-101 to 350°C)
SIZE: NPS 2-56 (DN 50-1400)
PRESSURE RATING:ASME 150 - ASME 2500
FACE-TO-FAC::As per API 6D standard
END CONNECTIONS: RF, RTJ as per B16.5 &B16.47; BW, Butt Welded as per B16.25; SW, Socket Welded as per B16.11 Hub connection
BODY DESIGN: Forged bolted two-piece and three-piece
SEAT DESIGN: Soft or metal seated with Hardfacing on ball and seats; Self relieving seats; Double piston seats; Combination seats; Interchangeable seats

FEATURES:
Secondary seals in pure Graphite;
Anti-Static Device;
Anti Blow out stem;
Emergency sealant injection on seats and stem available;
Low fugitive emission stem packing available;
O-ring /Lip seals and Graphite configuration;
CRA overlay on all dynamic sealing areas or on all wetted parts available;
Extended bonnet for low & high temperature available