Swagelok^® Bulk-Gas Diaphragm Valves (LD Series)

Swagelok 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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Swagelok^® LD series bulk-gas diaphragm valves are engineered for shutoff, bulk-gas distribution, and isolation services at working pressures up to 300 psig (20.6 bar). Three distinct diaphragms provide the ideal combination of strength, flexibility, and cycle life, while the all-metal design reinforces safety and durability.

Swagelok LD series valves also feature an innovative design that eliminates springs and threads in wetted areas, resulting in a cleaner operation and reducing contamination risks. In addition, the unique compensating stem tip design with a PCTFE insert promotes leak-tight shutoff and prevents damage from overtightening.

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

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Bulk Gas Diaphragm Valves Catalogs

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Diaphragm Valves LD Series

Features: Working pressures up to 300 psig (20.6 bar); Shutoff, bulk-gas distribution, and isolation service; Cast, forged, and bar stock stainless steel body material; 1/4 to 1 in. and 12 to 25 mm end connections

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