Claw Pump

Operating principle of a claw pump.

Claw pumps have two rotors that turn synchronized in opposite direction in a compressor housing without contact. As the claw moves over the suction connection and the axial suction channel inlet the air is sucked into the compression chamber. As the rotors revolve, the air moves from the suction side to the pressure side. Then it is compressed by the reduction of the volume between the rotors until the lower rotor uncovers the discharge channel. This “internal compression” leads to high differential pressures at efficiencies of more than 60 %. The compressed air is discharged via the pressure connection. To remove the heat generated by the compression process, cooling air is sucked in between the compression housing and a silencing cover before it leaves the pump.

Image Explanation:

1. Claw 1
2. Claw 2
3. Inlet
4. Inlet channel
5. Compression chamber
6. Exhaust
7. Claw housing
8. Pump house