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Bellows-Sealed Valve

Swagelok® Bellows-Sealed Valves

Bellows valves use a packless design and welded seal to prevent leaks to atmosphere in general and high-purity service with a variety of flow coefficient and stem tip material options.

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

The Right Valve Can Make All the Difference

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

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Swagelok Resources Curated for You

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How to Select the Right Valves for Your Industrial Fluid System

Learn how to apply the practical STAMPED method to select the valves most suited to your industrial fluid or sampling system design applications.

Reducing fugitive emissions in the chemical and refining industries
Minimize the Costs of Fugitive Emissions with Low-E Valves

Fugitive emissions are a growing concern in the chemical and petroleum refining industry. Certified low-emissions (Low-E) valves can protect your facility and bottom line. Learn what they are, how they are tested, and how they can help you in this post.

Block valves in an industrial fluid system
How to Isolate Industrial Fluid Systems with Block Valves

The isolation of industrial fluid system lines prior to maintenance is vital to plant safety. One of the safest ways to isolate a fluid system line is to install two block valves. Learn how to design proper configurations for your system.

Cleanroom assembly of a Swagelok ALD20 UHP valve for semiconductor industry use
One New Valve. Three Reasons It Could Change Semiconductor Manufacturing

Find out how the latest innovation in atomic layer deposition (ALD) valve technology is changing the game for high-tech semiconductor manufacturers.

Bellows-Sealed Valves

Bellows-Sealed Valves

Bellows valves provide reliable, leak-tight performance with a packless design and welded seal to prevent leaks to atmosphere where that seal to atmosphere is especially critical. A variety of styles, stem tip materials, flow coefficent ranges, and end connections provide multiple options for use in general and high-purity service.