Transcend Cleantec - Rootx Blower - Brochure

Roots blowers mechanism: The Roots-type blower is a positive displacement lobe pump which operates by pumping a fluid with a pair of meshing lobes resembling a set of stretched gears. Fluid is trapped in pockets surrounding the lobes and carried from the intake side to the exhaust. The Roots is a valve less positive displacement mechanism in which a pair of lobed rotors, interlocked and synchronized, rotate in opposite directions moving past each other and the stator wall with small clearance. AIR / Gas is trapped in front of each lobe and swept around the stator periphery from inlet to outlet. Very large displacement (above 20000 m3/h) and the mechanism has proven very effective in the pressure region from 10 to 10"3 mbar, but only when delivering against low pressure differentials. As a displacement machine and not a true compressor, the Roots mechanism is not suited to discharging to near atmospheric pressure (i.e with significant differential pressure).