With KCP vacuum pumps, two claw-shaped rotors turn in opposite directions inside the housing. Due to the shape of these claw rotors, the air or gas is sucked in, compressed and discharged. The claw rotors do not come into contact either with each other nor with the cylinder in which they are rotating. Tight clearances between the claw rotors and the housing optimise the internal seal and guarantee a consistently high pumping speed. A synchronization gearbox ensures exact synchronization of the claw rotors. KCP vacuum pumps are driven by a directly flange-mounted asynchronous motor, with an efficiency class IE2 / IE3.