Vacuum Pumps

A vacuum pump is a device which creates low pressure (or vacuum) within a closed space. This technology is used for many different applications where a vacuum is required for operation. For example, the most efficient method for forming semiconductors requires the use of vacuum. Vacuum pumps are also used in electron microscopes, mass spectrometers, freeze dryers, vacuum ovens, packaging machines, CNC Routers (hold down tables), degassing systems, thin-film coaters, medical/laboratory suction plants, and many other systems.

There are three major types of vacuum pumping technology used in vacuum pumps throughout science and industry:

Positive displacement pumps: Expands a cavity inside the pump which is connected to an external system (ie a chamber), this forces air into the cavity from the chamber. The chamber is then closed off to the pump and an exhaust vent within the pump is opened to atmosphere, the pump cavity contracts expelling the air from the pump. The exhaust vent is then closed, and the connection to the chamber re-opened so that the process can be repeated, continually drawing air from the chamber. This process generates low pressure within the chamber.

Pumps that use this technique for producing vacuum include rotary vane, piston, diaphragm, screw, claw, roots, scroll, and liquid ring pumps.

Momentum transfer pumps: Have a mechanism which uses very high speed blades or high speed jets of fluid to force air out of the chamber creating a vacuum.

Pumps that use this technique for producing vacuum include turbo-molecular and vapour diffusion pumps.

Entrapment pumps: Condense gas molecules to an adsorbed or
solid state to create a vacuum.

Pumps that use this technique for producing vacuum include
cryopumps and chemical pumps.

AVT provides full sales support for all types of vacuum pumps listed above and full repair service support to all makes and models of pumps Australia wide. If you have any queries about our products or services, do not hesitate to Contact us by phone or email.

Click here to order vacuum pumps online.