SBB API Ball Valve Stainless Steel 1/2 inch - 2 inch Single Block And Bleed Valve

SBB Stainless Steel Single Block & 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: