Multi-Vane Conductance Control Valves
Pneumatic version
Since the rotating vanes cannot completely block gas, never use vane-style conductance control valves as shutoff valves (see table). They simply throttle the gas flow, enabling a higher pressure in the chamber while maintaining the pumping system within its normal pressure range.
This effect has three main applications
NOTE: Pneumatic valves require 60–80 psi air pressure for actuation. ASA flanged multi-vane control valves have a flange o-ring groove on one side as standard.
Lesker Conductance Control Multi-Vane Valves (CF flanged)
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