How Many Types of Vacuum Pumps are There?
Generally, there are three main types of vacuum pumps, concluded as follows:
- Positive Displacement Vacuum Pump: It mainly use volume change of the cavity to realize suction and exhaust so that the pressure can be increased and decreased. The positive displacement vacuum pump is one of the most commonly used vacuum pumps, which includes the water circulating vacuum pumps, rotary vane vacuum pumps and diaphragm vacuum pumps.
- Entrapment Vacuum Pump: It is a refrigerated device that induces condensation of air molecules by cooling within a confined space. The resulting water is then removed.
- Momentum Transfer Vacuum Pump: It can be further classified into centrifugal and regenerative vacuum pumps. The former utilize a centrifuge to propel fluids through the device, while the latter recirculate fluids to increase the pressure.