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Bellows-Sealed Valve

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.

View Bellows Valves

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 Categories

Bellows-Sealed Multi-Valve Manifolds, V3 Series

Bellows-Sealed Multi-Valve Manifolds, V3 Series

The Swagelok® 3-valve manifold uses bellows-sealed valves for systems with difficult fluid containment requirements.

Bellows-Sealed Valves for Switching Service, BY Series

Bellows-Sealed Valves for Switching Service, BY Series

Discover the BY Series Bellows-Sealed Valve for switching service. Compact, packless design with Torlon® stem guide for consistent shutoff.

General-Service Bellows Valves, B and H Series

General-Service Bellows Valves, B and H Series

Ensure reliable shutoff with precision-formed metal bellows valves with gasketed or welded body-to-bellows seals and stem tips for regulating service.

High-Pressure Bellows Valves, HB Series

High-Pressure Bellows Valves, HB Series

Explore high-pressure, pneumatically actuated bellows-sealed valves with all-metal seal to atmosphere and with full pressure rating in either direction.

High-Purity Bellows Valves, BN Series

High-Purity Bellows Valves, BN Series

Discover high-purity valves with positive stem retraction, smooth actuation, and union bonnet construction for enhanced cycle life and cleanliness.

High-Temp Bellows Valves with Secondary Packing, U Series

High-Temp Bellows Valves with Secondary Packing, U Series

Enhance reliability and versatility with Swagelok® U series bellows-sealed valves, which feature a secondary containment system that prevents atmospheric leaks.

Metering Bellows Valves, BM Series

Metering Bellows Valves, BM Series

Reliable metering bellows valves feature a hardened stainless steel actuator, six-turn max flow, and slotted handles for screwdriver adjustments.

Pneumatic Actuators

Pneumatic Actuators

Enhance your system's performance with high-quality pneumatic actuators for bellows-sealed valves, designed for reliable and precise fluid control.

Spare Parts and Accessories

Spare Parts and Accessories

Find high-quality components designed for optimal compatibility. Spare parts and accessories for stem tip kits, bellows kits, indicator switch kits, and gasket kits.

Bellows-Sealed Valves Catalogs

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

Swagelok flow coefficient (C<sub>v</sub>) calculator for valves

Calculate Flow Rate for the Right Valve Selection

Use our valve flow coefficient (Cv) calculator to chose a valve sized correctly for your needs.

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