Vacuum pumps (also called vacuum generators) are simple devices with no moving
parts. They use compressed air to create a vacuum at the pump's outlet.
Compressed air is supplied to the inlet of the vacuum pump where it is directed
through a venturi. As the air leaves the venturi and expands it creates a
vacuum. Vacuum pumps are often available with multiple venturies to optimize
vacuum generation.
Since compressed air is available in abundance throughout most manufacturing
plants, these type of vacuum pumps are ideal for applications that require a
minimal amount of vacuum. Many machines use venturi style vacuum pumps to
provide power to their vacuum cups. The vacuum pumps are often installed right
at the location that the vacuum is needed, sometimes with the vacuum cup
attached directly to the pump.
Most manufacturers of vacuum pumps offer a modular system to ease the
installation of the pump. The modular accessories include:
Compressed air supply control valve
Compressed air blow-off control valve
Vacuum switch
Vacuum gage
Mounting of multiple pumps on a single supply manifold
Vacuum pumps also have the unique ability to be used within hazardous
locations. Since there are no moving parts, and no electrical signals, the
vacuum pump is ideal for explosion-proof applications.
