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Vacuum Valve
Are there solenoid valves available that are designed to operate under vacuum? All the KOP valves require at least some positive pressure to actuate, unfortunately. I've found several manufacturers online, but they all look to be producing for precision industry- so not real cheap...or available.
Secondly, the rules this year allow for vacuum devices, and the pnuematics rules allow for the purchase of any solenoid valve rated for 125 psi, but would the solenoid in a vacuum valve break these rules? It likely would not be rated to 125 psi, but it is a vacuum device, and solenoid valve.
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