Kurt J. Lesker Company

Gate Valves

Valves suitable for coarse through extreme ultra high vacuum operating pressure ranges are offered. Both manual and pneumatic valves are offered as standard in a variety of sizes and flange types.

Valves suitable for coarse through extreme ultra high vacuum operating pressure ranges are offered. Manual, Pneumatic and Electromagnetically actuated valves are offered as standard in a variety of sizes and flange types.

Ball Valves

Ball valves provide resiliency that other valves may struggle to handle, stainless steel ball valves are the standard and most commonly used.

Rectangular Gate Valves

Rectangular Gate Valves are typically used for load lock/ process module isolation. KJLC offers a variety of these valves including but not limited to Dual Housing, Door (housing-less), and Integrated Heater models.

Inline Valves

Inline Valves share most features and applications noted for angle valves but with one port turned 90° so its axis is parallel with the other port's axis.

All-Metal Valves

All-Metal Valves (metal bonnet seal and metal vacuum seal) are intended for use in a variety of UHV and extreme UHV applications where temperature extremes preclude the use of elastomer seal valves.

Inline Check Valves

Inline Check Valves serve a variety of purposes in vacuum systems; including reducing pumping speed for soft start operation, preventing air in rush at pump power down, and protecting against turbulence in piping and chambers.

Butterfly & Control Valves

Conductance controllers are ideally suited for applications where consistent and reactive pressure control is a necessity. These units are actuated via stepper motor and include an onboard control package.

Diaphragm Valves

Diaphragm Valves are robust low cost vacuum valves for venting, rough-metering and isolation. Well suited for corrosive gases and liquids. Buna-N and Fluorocarbon diaphragm versions are available.

Exhaust Check Valves

KJLC offers Exhaust Check Valves to prevent air in rush into a vacuum pump or vacuum system upon powering down of the pump. Available in both vertical mount ball type and flexible mounting spring type.

Auto-Off Safety Vent Valves

This automatic foreline shut-off valve is a safety valve that protects the vacuum system upon power failure by isolating the vacuum system and venting the mechanical pump.

Up to Air Vent Valves

Up to Air Vent Valves can be used to vent a chamber to atmosphere or can be used as a gas inlet to allow for backfilling of a chamber. These valves are mounted on KF & CF flanges with a bellow sealed, manually actuated valve.

Gas Valves & Accessories

Shut-off, metering, or needle style valves
Manual control
Multiple flange/fittings styles

Vacuum Valve Technical Notes

Overview of vacuum valve characteristics and other related topics.

Vacuum Valves FAQ

Answers to some of the most common questions we get asked.

Even a casual study of vacuum technology makes it abundantly clear that valves are almost as vital to the industry as pumps. We offer a wide variety of valve types in a comprehensive range of sizes.

Most valves are available on-line but for those without prices shown, please contact the Product Manager by email or call +1 800 245 1656.

For a listing of Frequently Asked Questions (FAQs) about Vacuum Valves please see this link: Vacuum Valves FAQ.