Bellows sealed stop valves
Overview
Spirax Sarco BSA series bellows sealed stop valves use a dedicated bellows seal design to eliminate stem gland leakage completely and meet demanding leakage classifications. The BSA range includes throttling plug options, double bellows sealing for longer life and robust construction across sizes from DN15 to DN250 with flanged, threaded and socket weld connections. They are suited to steam and condensate, process fluids, hot and cold water, hot oil, thermal fluids, toxic fluids, compressed air, other gases and industrial water / glycol services.
Related leakage-control routes
Bellows sealed stop valves are usually selected when leakage containment carries more weight than general shut-off economy. If the application can use simpler manual isolation, compare HV3 stop valves. Where the project instead favours quarter-turn automation and low pressure drop, continue into ball valves.
For the model-level route in this family, use BSA2T bellows sealed stop valve or BSA3T bellows sealed stop valve.
BSA2T bellows sealed stop valve
Ductile iron bellows sealed stop valve for reliable shut-off in steam, condensate and industrial fluid services, used here as the direct product list entry for this terminal category.
BSA3T bellows sealed stop valve
Carbon steel PN40 bellows sealed stop valve for higher-pressure steam, condensate and industrial fluid isolation duties where tighter leakage control still matters.