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Re: Vacuum Valve
Even if it was allowed in the rules, there is no reason to have a vacuum valve. I would even say it is a bad idea. The way venturis operate requires airflow to create vacuum. If you could somehow find a valve, you would be constantly running air through the vacuum generator. If you want a way to control the vacuum generator, you should use a pressure rated solenoid valve somewhere on the pressure side of the vacuum generator.
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