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Swagelok^® Bellows-Sealed Valves

Swagelok bellows-sealed valves are designed to limit the potential for leaks, with many featuring a packless design or welded seals. They provide reliable, leak-tight performance in applications where the seal to atmosphere is critical to keep operators safe and processes functioning as intended.

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Swagelok bellows-sealed valves are available in a variety of styles and configurations, allowing users to find options that work well in their general and high-purity applications. Options include gasketed or welded body-to-bellows seals, stem tips for shutoff or regulating service, a variety of end connections, a wide range of flow coefficients, and panel or bottom mounting.

Specialized Swagelok bellows-sealed valves with micrometer handles allow for precise, repeatable flow setting by allowing stem position changes in as little as 0.001 in. (0.025 mm) increments
Compact Swagelok bellows-sealed valves for switching service allow for flow to be changed from one line to another using manual and spring-return or double-acting pneumatic actuators
High-pressure, pneumatically actuated Swagelok bellows-sealed valves can handle elevated working pressures and temperatures to match process requirements
Select Swagelok bellows-sealed valves feature a secondary containment system that prevents leaks to atmosphere even if the primary seal fails, enhancing reliability, versatility, and safety

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Bellows-Sealed Valves Catalogs

Locate detailed product information, including materials of construction, pressure and temperature ratings, options, and accessories.

Bellows-Sealed Valves, B Series

Swagelok® B series bellows-sealed valves are available in a range of configurations to meet a variety of system needs. Gasketed and weld body-to-bellows seals, shutoff and regulating stem tips, and several end connections are offered.

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Bellows-Sealed Metering Valves, BM Series

Swagelok® BM series bellows-sealed metering valves use a micrometer handle for precise, repeatable flow settings at pressures up to 700 psig (48.2 bar) and temperatures up to 900°F (482°C).

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Bellows-Sealed Valves, H Series

Features: Compact size; Working pressures up to 1000 psig (68.9 bar); Temperatures up to 600˚F (315˚C)

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Bellows-Sealed Valve for Switching Service, BY Series

Features: Compact, packless valve switches flow from one line to another. Torlon® stem guide ensures proper alignment for consistent shutoff performance. Manual and spring-return and double-acting pneumatic actuators are available. End connections include 1/4 in. Swagelok® VCR® metal gasket face seal fittings and 1/4 in. Swagelok tube fittings.

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High-Pressure, Pneumatically Actuated Bellows-Sealed Valves, HB Series

Packless valves with all-metal seal to atmosphere; Working pressures up to 3500 psig (241 bar); Temperatures up to 400°F (204°C); VCR® face seal fitting, Swagelok® tube fitting, and weld end connections

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Bellows Sealed Valves U Series

Features: Secondary containment system above the bellows; Working pressures up to 2500 psig (172 bar); Temperatures up to 1200°F (648°C); 1/4, 3/8, 1/2, 3/4, and 1 in.; 6, 10, and 12 mm end connections; Stainless steel material

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Bellows-Sealed Valves, BN Series

Features: Packless valves with all-metal seal to atmosphere; Working pressures up to 500 psig (34.4 bar); Temperatures up to 200°F (93°); 1/4 to 1/2 in. and 6 to 12 mm end connections

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