Compressed Air Solution

Sep 26, 2020

Vacuum Pumps

Vacuum pumps are devices used to remove gas molecules from a sealed volume to create a partial or complete vacuum. They work on the principle of creating a pressure differential between the chamber or container and the outside environment. Here are the working principles of the two main types of vacuum pumps:
Positive displacement vacuum pumps: These pumps work by creating a vacuum through the expansion and contraction of a sealed chamber or cavity. As the volume of the chamber expands, the pressure inside the chamber decreases, creating a partial vacuum. When the chamber contracts, the pressure increases and pushes the gas out of the chamber. Positive displacement vacuum pumps include piston pumps, rotary vane pumps, and screw pumps.
Momentum transfer vacuum pumps: These pumps work by transferring gas molecules from the vacuum chamber to an exhaust system by creating a high-velocity gas stream. The gas molecules collide with the pump walls, losing their momentum and being trapped. Momentum transfer vacuum pumps include diffusion pumps, ion pumps, and turbomolecular pumps.
Both types of vacuum pumps can be further categorized based on their specific design and mechanism, but the principle of creating a pressure differential remains the same. Vacuum pumps are commonly used in a wide range of applications such as laboratory research, semiconductor manufacturing, and vacuum coating processes

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