How does a vacuum generator operate?
The Festo vacuum generator operates on the venturi principle. The compressed air flows from the pressure supply port into the ejector. The constriction in the venturi nozzle increases the flow velocity of the air to a supersonic speed. After exiting the venturi nozzle, the air expands and flows through the receiver nozzle into the outlet port (silencer). In the process, a vacuum is created in the chamber between the venturi and receiver nozzles, which causes air to be drawn in from the vacuum port. The vacuumed air and exhaust air both leave through the outlet port (silencer).
