Kinney vacuum pumps come in several types such as liquid ring, dry vacuum, rotary vane two-stage and piston single & two-stage, and vacuum boosters. The rotary Kinney vacuum pumps are heavy duty pumps capable of producing an ultimate vacuum of .2 microns (0.0002 Torr). These are made for demanding applications where high resistance to abrasion and corrosion is required. Typical applications include air conditioning & refrigeration, evacuation, epoxy degassing, a holding pump for diffusion pumps, lasers, etc. The Liquid ring Kinney Vacuum pumps remove gasses by means of an impeller rotating freely in an eccentric casing. Various construction materials, such as cast iron casing with bronze or stainless steel impellers or all 316 stainless steel, are available on Kinney vacuum pumps to meet corrosion concerns.