Roots series oil-free reciprocating vacuum unit

this is a new develop of vacuum unite, The main pump is a roots pump. Widely used in electronics , vacuum coating , chemical fiber, metallurgy,heat treatment, welding,vacuum distillation,crystallization drying , polyester chips. compare with the roots water cycle unit, 1, the high limit vacuum, long term stability 2, high vacuum pumping rate is large 3, motor power, low energy consumption 4,over-current part of the lubricating oil is conductive to the recovery of tail gas 5, no secondary pollution , reduce pollution stress