The dry vacuum pump works without lubrication. It can be also used as blower, providing a clean, dry air, uncontaminated with oil. Thanks to these facts, the dry vacuum pump has a large of applications: food industry, pharmacy industry and other fields needing a vacuum at about 0,6 bar. In case of using it simultaneous both as vacuum pump and blower, it is recommended that the sum of pressures, in the pump stage and the blower stage, to be equal or lower than 0,6 bar