Among the different types of industrial pumps available, a rotary vane vacuum pump is a great option. It is suitable for a wide range of vacuum applications such as in the chemical laboratory, process engineering, freeze-drying, and more. Many of these kinds of pumps can handle thin liquids at relatively high pressure. When in active operation, it is the extension of the vane pump that compensates for the wear and tear of the moving parts.
Rotary vanes come in two major types, namely the dry-running and lubricated. An oil-lubricated rotary vane vacuum pump is the most frequently used type in many industrial applications. It can also run dry for a shorter period of time which reduces oil consumption and costs. Conversely, dry-running pumps are very cost-effective and are popularly known for being an eco-friendly selection. Despite their vane variations, both pumps have the same key components: a housing, a rotor, and a series of vanes. There is also a working chamber inside the housing and is divided into two separate compartments by the vane and the rotor.
In a standard setup, the continuously moving part is the rotor and most of the rotary vane vacuum pump includes an inlet as a safety feature. It is available in two varieties in terms of stages or the number of times that compression happens - the first-stage pump and two-stage pump. The two-stage versions are capable of achieving a lower pressure than their single-stage counterparts as gas is only admitted during the high-pressure stage. Despite their differences, both the pumps work through the same operating principle.
Every time the rotor turns, a centrifugal force is generated whereby compression cells are created. The gas is then pumped to flow into the suction chamber where it will be sealed by a vane. There the gas will be compressed until the atmospheric pressure (ambient air) drives the outlet valve to open. This is when the rotary vane vacuum pump does its magical work in producing power supply for many industrial machines.
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