Reliable and Robust Isolation Valves

Valve selection

Discover the selection of isolation valves: We give you a comprehensive insight into how to find the ideal solution for your process.

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All isolation valves

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High vacuum valves

Angle valves, gate valves and ball valves at a glance

Angle valves divert the gas flow by 90°, while inline valves, with opposite connecting flanges, allow easy installation in straight pipelines. Both variants usually use a bellows as a seal.

Gate valves and isolation pendulum valves are perfect for confined spaces, and ensure unobstructed gas flow with optically free passage. They are designed for high and ultra-high vacuum and often open at low differential pressures of 30 mbar. Ideal choice for airlocks or upstream of pumps.

Ball valves can also be used in certain high vacuum applications. Cost-optimized KF designs show leakage rates of 10-6 mbar l/s and are temperature resistant up to 80 °C. Special designs are suitable for the HV range and withstand temperatures up to 150 °C.

The choice of the right valve depends on factors such as the process sequence, the process temperature, the ultimate vacuum and the gas composition. In the following sections, we give you an overview of our valve types, seals, sealing mechanisms and drive types. At Pfeiffer, you will find the right valve solution for your vacuum range.

Ecofriendly Electric Angle Valve for Enhanced Control and Durability

Actuator types

Manual valves with handwheel or quick-closing/quick-opening are temperature resistant up to 150 °C. No restrictions due to electronic components.

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Electric actuation uses electric motors to convert electrical energy into precise mechanical movement, providing automated and reliable control without the need for compressed air.

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Pneumatically actuated valves require an oil-free compressed air supply. Different versions available.

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Pneumatically actuated valve with built-in solenoid valve to control the compressed air supply to the valve.

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Seals and sealing mechanisms

Seals and sealing methods play a decisive role in the selection of the right valve for the vacuum system.

Elastomer seals: O-rings used to seal the valve to withstand leak rates in the high vacuum range. Suitable for different temperatures depending on actuation type and elastomer.
Metal seals: Do not require elastomers and are therefore UHV-compatible (10-12 mbar) and heat-resistant up to 300 °C.