3 Main Types of Vacuum Pumps You Need to Know

3 Main Types of Vacuum Pumps You Need to Know

Vacuum pumps have been used in a variety of studies, technologies, and applications–with end products ranging from automobiles, pharmaceutical processes, sewage systems and a lot more.

While the importance of vacuum pumps in science and technology is unquestionable, there are things that you need to know to understand it further. And what better way to explore it than to know the types of vacuum pumps and how each system works.


3 Main Types of Vacuum Pumps

1. Dry Pumps

Described as non-lubricated vacuum pumps, dry pumps allow a clean vacuum over the whole vacuum range. One advantage of these vacuum pumps is its low maintenance requirement and capacity to function without generating waste materials. On the downside, however, dry pumps require a higher initial cost.

The most common types of dry pumps include:

  • Diaphragm
  • Piston
  • Scroll
  • Turbomolecular Pumps


2. Water-Based Pumps

Contrary to a dry pump, this type of vacuum pump provides rough vacuum and only requires low initial cost with minimum maintenance. One main advantage of this vacuum pump is its capability to resist corrosion. However, it is not recommended for systems that are sensitive to water vapor. Another issue with this vacuum pump is the disposal of contaminated water.

Water aspirator pumps are among the most common water-based pumps used today.


3. Oil-Lubricated Pumps

When it applications that require high pumping speeds at an affordable price, oil lubricated pumps would be your best choice. However, there are certain requirements that must be met to maintain the optimum condition of these vacuum pumps. For one, oil-lubricated pumps require regular maintenance and routine oil change because without doing so, your vacuum pump may be contaminated with oil. Another important thing to take note of is that oil-lubricated vacuum pumps require inlet and outlet filters as protection, not only to the pump but to the environment as well.

Some of the most common examples of oil-lubricated pumps include:

  • Rotary Vane Pumps
  • Gear Pumps


Other Types of Vacuum Pumps

With its versatility, there are other types of vacuum pumps that are used in a wide range of applications and some of these are as follows:

Laboratory or Filtration Vacuum Pumps

These are the types of vacuum pumps that mainly come with vacuum and pressure features that work for a range of purposes such as filtering, drying, degassing and evaporation.

Rough Vacuum Pumps

Especially suited for applications that require a vacuum level of less than 10–3 Torr, particularly those that involve degassing, freeze drying, and cryogenics.

High Vacuum Pumps

On the other hand for requirements involving higher than 10–3 Torr, high vacuum pumps are preferred. This is mainly used for mass spectroscopy, electron microscopy, evaporation coating, and space simulation.


Vacuum Pumps are used in a variety of operations and you must understand each type, as well as its functions to know how the system works.

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