The ABB-70 water-ring vacuum unit is designed to create a stable vacuum, necessary for machine milking cows in milking installations, for operation in temperate climates in rooms with a temperature of 0 to +30 ºС and an altitude of not more than 1000 m. The unit can work from any drive that provides power and rotor speed. The unit with a three-phase motor operates in continuous operation from an alternating current main with a nominal frequency of 50 Hz and a nominal voltage of 400 V.