A rotary vane vacuum pump is a type of positive displacement pump that uses rotating vanes to generate vacuum. A rotor with several vanes is mounted eccentrically inside a housing. Due to centrifugal force, the vanes slide out and form chambers between themselves and the housing. They separate a specific volume of the pumped medium, trapping it inside the chambers. Within one rotation, the chamber size shrinks until the pumped medium has reached maximum compression and is expelled at the outlet. The chamber size expands again at the end of the revolution.
Rotary vane vacuum pumps are available in single- and two-stage versions and can be operated with different types of lubrication or dry-running. In single-stage versions, compression is carried out once. In two-stage versions, the pumped medium is compressed again in a second stage to allow for higher vacuum levels. Vacuum pumps with this technology are used for various applications in industries ranging from packaging to hospital and healthcare facilities, as well as wastewater treatment.
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