JZJ Roots water ring vacuum unit (details of the consultation http://www.zbjzzk.com) use water ring pump as a backing pump, vacuum pump is more favorable than the other, look at it together. 1, to overcome the single water pump when using extreme pressure difference, at a certain disadvantage of low pressure pumping speed while retaining the Roots pump can work quickly, there is a greater advantage pumping rate; 2, when fitted with explosion-proof and comply with the relevant safety rules under the motor and electrical, but also pumping flammable gas; 3, extreme pressure unit has greatly improved over the water ring pumps. JZJ Roots water ring vacuum unit can accommodate a large number of pumping condensable vapors, especially when gas ballast pump mechanical seal exclude condensable vapor lack of capacity, or the solvent used to make pump oil to deteriorate while performance impact.