This article focuses on the core product of Spirax Sarco, the global steam solutions specialist -- Bellows Sealed Globe Valves, and comprehensively analyzes its technical advantages and industrial application value. This series of valves adopts double/triple-layer stainless steel bellows seal design to realize "zero leakage", with cast steel, stainless steel and ergonomic handwheels, combining durability and ease of operation, and can be stably operated from -29°C to 425°C and 0-102 bar g. The products cover the full range of DN15-DN400, supporting flanges of up to 1.5 mm and up to 1.5 mm. The products cover the full range of diameters from DN15 to DN400, support flange/welded connections, and are suitable for steam, chemical fluids and other scenarios. BSA2T/3T/6T models are available to meet the needs of different pressure levels. Relying on the global technical network, Spirax Sarco provides customers with customized solutions and full life-cycle services to help industrial fluid control achieve high efficiency, energy saving and safety.