Liquid Ring Vacuum Pump: A liquid ring vacuum pump is a rotary positive displacement pump used to create vacuum by means of a rotating impeller and a sealing liquid, typically water or oil. The impeller is eccentrically mounted within a cylindrical casing partially filled with the sealing liquid. As the impeller rotates, centrifugal force forms a rotating liquid ring that creates variable-volume chambers between the impeller blades. Gas is drawn into these chambers through the suction port, comp