The ROOTS™ RGS high vacuum boosters covered in this manual are intended especially for use in the first stage of a vacuum pumping system, in combination with a suitable fore-pump or roughing pump, to produce vacuum conditions in the micron range. It is not suitable for duty as a normal pressure blower.
Principle design features of the basic ROOTS™ rotary lobe blower are used in the booster. Two impellers are mounted on parallel shafts, and rotate in opposite directions within a cylinder closed at the ends by head plates. The impellers are positioned one above the other, while the cylinder has inlet and discharge piping connections located on opposite vertical sides.
The basic high vacuum booster is constructed with a close-grained grey iron cylinder, alloy steel timing gears, ductile iron impellers and anti- friction bearings
RGS High Vacuum Boosters have four pressure lubricated single-face seals, one at each shaft, between the bearing and pumping compartment
Gears and bearings are under atmospheric pressure
A shaft driven oil pump supplies clean, cool lubricating oil to gears,bearings and seals