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Rotary Twin Lobe Blowers / Compressors follow the well established principle of the roots-type machine. Operation is both simple and effective. Two 8-shaped Rotors / Impellers, mounted on parallel shafts and contained within casing rotate in opposite directions. The Shape of the impellers is such that a small accurately gauged clearance is maintained at all times between the impellers and casing. As they rotate, air is drawn in to the space between the impellers and the casing, where it is trapped as the tip of
the impellers passes the edge of the inlet opening. Continuing its rotation, the opposite tip of the impeller passes the edge of the outlet opening and the trapped air is pushed through the outlet into the air line. This action is repeated twice for each revolution of the impeller, or four times for each revolution of the drive shaft, for each size of compressor a calculated amount of air moves at any given speed and pressure. This makes it simple to select the speed at which the blower / compressor should operate to supply the required volume of air.