The machine set is applied to the industries such as chemical engineering, pharmacy and food

Compared with other Roots water-ring machine set, the machine set has the following characteristics:
 1.Solving the long standing problem of heating of Roots mercury (close to the water-ring pump) discharge port;
 2.Solving the problem of noise generated when the water-ring pump operates under a pressure close to the limiting pressure;
 3.Greatly widening the working pressure range;
 4.Greatly improving the air pumping speed (efficiency) in the range of working pressure.

Requirements on the corrosion resistant measures taken to the pumps forming the machine set
 1.Performing special scientific corrosion resistant treatment on the surfaces flown by gases in cavities of the Roots pump and the water-ring pump, using sealing materials with different characteristics aiming at different media so as to quite effectively prevent corrosive gases from damaging vacuum equipment in industries such as chemical engineering, pharmacy, smelting and electrics;
 2.Mechanically sealing the water-ring pump to form vacuum, tightly plating a tight and highly efficient corrosion resistant layer on the surfaces flown by gases or completely using stainless steel parts in order to prevent corrosion of corrosive gases in industries such as chemical engineering and pharmacy.