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单向阀

Swagelok® Check Valves

Swagelok check valves come in a broad range of adjustable and fixed cracking pressures to control back flow in general-service and high-purity applications. Excess flow valves will stop the release of excess flow downstream, enhancing system integrity and safety.

Check Valves Catalogs

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

世伟洛克阀门流量系数 (C<sub>v</sub>) 计算器

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

流体取样系统的阀门选型
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.

减少化工和精炼行业中的逸散性排放
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.

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How Shenyang Blower Works Group Improved Safety and Reliability

Learn how Swagelok Shanghai has helped Shenyang Blower Works Group Corporation achieve consistency, reliability, and cost savings for its customers while improving its own safety and production efficiency.

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How to Improve Your Maintenance Program with Valve and Hose Tags

Read what two Swagelok specialists have to say about how a robust tagging system for hoses and valves throughout your industrial fluid systems can help you simplify maintenance and minimize system downtime.

单向阀和过流量阀

Check and Excess Flow Valves

Check Valves

Check valves are designed to allow fluids to flow in one direction only and are rated for use in medium- and high-pressure applications. Swagelok check valves come in a variety of designs, including spring and poppet, lift, and all-welded high-purity for use in a range of situations.

XS Series Excess Flow Valves

XS series valves have a slotted poppet which moves to the tripped position when excess flow occurs downstream, then resets when pressure equalizes. They elimnate the need for a complex bypass mechanism while reducing maintenance time.