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It is a kind of vacuum pumps system in which Roots pump is the main pump and single stage or multi stage rotary pump is the pre-pump. It is widely used in electric power station, chemical works, and metallurgy industry and electronics realm.
It is suitable to vacuum; vacuum oil and vacuum dry in transformers or electric power equipments

Work pressure: 133~5 Pa

It can supplement vacuum pump or imported Roots pump if necessarily.
My factory also can design exclusively according to the special demands.

Handle transformer oil at the normal temperature –Replacement of the purifie