Vacuum pumps and blowers from a rotating liquid ring are used for suction and discharge of gases and vapors at 100 ° C with the use of fluids with a viscosity of 80 mm ² / sec and a temperature of 80 ° C at the outlet; aggressive liquids will be located in the resistance corrosion of materials used for construction of the pump. They are used for producing vacuum in technological systems, priming siphon water, transport of bulk materials and in industrial processes in which gases are needed uncontaminated with oil: water supply industry, chemical, metallurgical, pharmaceutical, food, paper.