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世伟洛克 LD 系列大宗气体隔膜阀

Swagelok® Bulk-Gas Diaphragm Valves (LD Series)

LD series bulk gas diaphragm valves offer a combination of strength, flexibility, and cycle life to support a wide range of ultrahigh-purity shutoff, bulk-gas distribution, and isolation applications.

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LD series diaphragm valves have a welded diaphragm construction using three diaphragms welded to the stem to prevent leakage. No use of springs or threads in wetted areas enable cleaner operation, and a unique stem tip design promotes leak-tight shutoff. Flow coefficients up to 13 and a variety of body materials and configurations are available to meet a range of design specifications.


Working Pressure Up to 300 psig (20.6 bar)
Temperature –20° to 300°F (–28° to 148°C)
Flow Coefficient Up to 13
Body Materials CF3M cast stainless steel, forged and bar stock 316L stainless steel
Diaphragm Material 316L stainless steel
End Connections
Type Swagelok® tube fitting, male VCR® face seal fitting, female NPT, female ISO, tube extension
Size 1/4 to 1 in.; 12 to 25 mm

LD Series Bulk-Gas Diaphragm 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

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.

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.

应用于半导体行业的世伟洛克 ALD20 UHP 阀的无尘室组件。
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.

卡尔怀特曾经在半导体行业供应链的各个环节工作了近 40 年,他提出了有关半导体行业发展的过去、现在和未来的切身见解。
Q&A: Semiconductor Manufacturing Past, Present, and Future

Find out how collaboration between semiconductor tool OEMs, microchip manufacturers, and fluid system solutions providers has enabled the semiconductor market to keep up with the demands of Moore’s Law for decades, and where we go from here.

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