The Roots blower / Vacuum pump consists 2 triple lobe of rotors and rotate in synchronous and opposite direction by two timing gear. The two rotors are assembled with casing two side plates and keep small gaps and no contact rotation between the casing and two rotors and two side plate .When motor output to drive rotor and start working. The two rotors rotate in synchronous and opposite and continue to turn and suction a quantity of gas between the rotating rotors, casing and side plates continue rotation carry the trapped volume around the rotor and casing out the discharge port.
Twin Lobe Compressors use a pair of rotors for compressing the medium. These rotors are held in accurate alignment by antifriction bearing housed in rigid main covers. A pair of precision backlash corrected gears mounted externally to the main covers, turn the rotors in unison. There is no rubbing or contact between the rotors themselves or between rotors and the casing. The internal surfaces run dry. These machines have limited compression ratio usually 2, for pressure or vacuum service but handles very large volume of the medium. Absence of any suction or delivery valves, constitute a real economical advantage.
