Vacuum Pump

Vacuum pumps are used in a variety of process plants to pump air, water vapor, organic and inorganic

solvents and acids. There are many different types of vacuum pumps on the market today that meet special

needs in pumping various gases.

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History of vacuum pumps

• Suction pumps go way back (Romans, Byzantine empire, etc)

• Major improvements on the idea of vacuum made by Galileo, Evangeilist

Torricelli, and Blaise Pascal

• Otto von Guericke made first pump and famous for Magdeburg

hemispheres experiment

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Types of Vacuum Pump

• 3 Types Of Vacuum Pumps

Best Value Vacs Brand 3 CFM Single Stage Vacuum Pump

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• Vacuum pumps can be categorized as:

1. Filtration vacuum pumps low vacuum pumps used in filtering, drying,

degassing, and evaporation applications. Most laboratory/filtration pumps

have vacuum and pressure capabilities

2.Rough vacuum pumps used in applications requiring a level of vacuum

less than 10–3 Torr, such as degassing, freeze drying, and cryogenics

3.High vacuum pumps those vacuums higher than 10–3 Torr, used for mass

spectroscopy, electron microscopy, evaporation coating, and space

simulation

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• Additionally, vacuum pumps may be dry, water-based, or oil lubricated:

• Dry Pumps (non-lubricated) offer a clean vacuum over the entire vacuum range. These pumps require little maintenance and don’t generate any waste materials. Dry pumps do have a higher initial cost. Typical dry pumps include diaphragm, piston, scroll, and turbo molecular pumps.

• Water-Based Pumps provide a rough vacuum at low initial cost with minimum maintenance.

These pumps are corrosion resistant but are unsuitable for water vapor sensitive systems. Another concern for these pumps is disposing of contaminated water. Common water-based pumps include water aspirator pumps.

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• Oil-Lubricated Pumps deliver high pumping speeds and a range of

ultimate vacuum at an economical price. However, these pumps require

routine maintenance and oil changes. The oil may contaminate your

vacuum. The pumps also require inlet and outlet filters to protect the pump

and the environment. Oil-lubricated pumps include rotary vane pumps and

gear pumps.

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