Swagelok^® Check and Excess Flow Valves

Swagelok inline check valves come in a range of adjustable and fixed cracking pressures to control back flow in general-service and high-purity applications. Excess flow valves enhance system integrity and safety by eliminating the need for a bypass mechanism.

Check Valves | Designed for fluid flowing in one direction
Excess Flow Valves | Stop the release of excess flow downstream

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Swagelok^® check valves are designed to allow fluids to flow in one direction only. Our check valves are available in a variety of designs, including poppet, lift, and all-welded versions for use in general-service or high-purity applications, including those featuring medium or high pressures.

Swagelok check valves are available with a variety of end connections and sealing materials, allowing users to find easy-to-integrate solutions compatible with their systems and process media. Certain Swagelok check valves feature all-welded designs to provide reliable containment of system fluid in high-purity applications, and some are composed of ultrahigh-purity fluoropolymer and feature no O-rings, maximizing flow while reducing pressure drop, eliminating no-flow areas, and providing excellent leak integrity.

Swagelok^® XS series excess flow valves have a slotted poppet which moves to the tripped position when excess flow occurs downstream, stopping uncontrolled release of system media. They then reset when pressure equalizes. These valves eliminate the need for a complex bypass mechanism while reducing maintenance time.

Learn the differences between cracking pressure and resealing pressure to see if your check valve is working properly.

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Check Valves Catalogs

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

单向阀 C CA CH CP和CPA系列

工作压力达 6000 psig (413 bar); 可调节和固定的开启压力; 多种端接; 316 不锈钢和黄铜材料

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中高压接头卡套管阀门和附件

特点：316 不锈钢结构；温度高达 1000°F (537°C)；中压 (MP) 接头，尺寸范围 —1/4 到 1 英寸，压力额定值 — 高达 20 000 psig (1378 bar)；高压 (HP) 接头，尺寸范围 — 1/4 到 9/16 英寸，压力额定值 — 高达 60 000 psig (4134 bar)；NACE® MR0175/ISO15156 合规性

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全焊接单向阀：CW系列

全焊接设计可提供可靠的系统流体控制。当压差不到 2 psig (0.14 bar) 时,即可产生正向流动。当背压不到 2 psig (0.14 bar) 时阀即可关闭。

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单向阀特殊合金材料 CH 系列

特点：625 合金、825 合金和 2507 合金超级双相不锈钢材料；可用于 CH4 和 CH8 系列单向阀；工作压力可达 6 000 psig (413 bar)；1/4 至 1/2 in. 世伟洛克卡套管接头或 NPT 端接；固定开启压力：1 至 25 psi（0.07 至 1.8 bar）

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超高纯含氟聚合物无 O 型圈提升阀芯单向阀，CHP 系列

特点：改良型 PTFE 润湿元件符合针对超高纯系统元件的 SEMI 标准 F57-0301；细牙螺纹扩口和 Nippon Pillar® Super 300 端接；低开启压力和再封闭压力

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提升单向阀：50系列

结构坚固,全不锈钢结构, 反向流动系数小于正向流动系数的 0.1 %, 无弹簧或弹性体, 尺寸紧凑.

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工业用过流量阀：如果下游管线破裂、阻止系统截止的失控卸放　XS系列

压力达 6000 psig (413 bar); 温度达 400°F (204°C); 1/8 至 1/2 in. 和 6 至 12 mm 端部连接; 不锈钢结构

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

Calculate Flow Rate for the Right Valve Selection

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

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