Festo vacuum generators
Festo vacuum generators have a single-stage design and work according to the Venturi principle, i.e. they generate the vacuum from compressed air. With the Venturi principle, compressed air is fed into the ejector and accelerated to supersonic speed in what is referred to as the Venturi gland, a cross-sectional narrowing of the jet nozzle. As soon as the air has passed through the jet nozzle, a negative pressure is created and the air is sucked in through the suction opening. Compressed air and intake air can escape together through the female nozzle as exhaust air from the vacuum generator.
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