Oil-less rotary vane vacuum pumps are positive-displacement pumps that feature sliding vanes in a rotor rotating within a cavity. Rotary vane pumps never experience internal metal-to-metal contact, so they are able to self-compensate for wear.

They have lower maintenance requirements and maintain peak performance longer than other types of vacuum pumps. Kalbro's oil-less rotary vane vacuum pumps are an excellent choice for medium or variable vacuum range applications.