Assemble the Venturi
The vacuum generator (known as a venturi or venturi pump) operates on compressed air. See this chart for the air compressor requirements.
The vacuum press will be cycling on and off during operation. To do this, an electro-mechanical valve is needed to open and close the airflow from your air compressor. I suggest the use of Mac Valve brand pneumatics. They are very reliable and energy efficient.
You can find these valves at your local pneumatics dealer or you can help to keep this article ad-free by purchasing the Mac valve at VeneerSupplies.com. Here are the considerations for selecting the correct valve.