Bellows Sealed Stop Valves

The Spirax Sarco bellows-sealed globe valve catalog includes the BSA/BSAT, A3S/A3SS, and DBB3 product ranges. The BSA and BSAT ranges feature flanged connections, while the A3S and A3SS ranges offer bellows seal options in different materials. The DBB3 range uses a double block-and-bleed configuration for dual isolation. Key selection considerations include the pipeline connection type, valve body material compatibility, and the required safety rating for dual isolation of the process fluid.