Our Product
Elmo Rietschle
Oil Free Rotary Claw Vacuum Pumps C-Series
Advantages at a glance
- High efficiency
- Contact-less oil-free operation
- Air Cooled
- Precision German designed
- Variable speed drives available
- Low sound level
Dry Claw Vacuum Pumps – How It Works
Much like rotary vane and rotary lobe pumps, the claw compressors and vacuum pumps of the C-Series are based on a static compression system. In contrast to rotary lobes, compression happens internally by volume reduction.
A claw pump consists of two rotors, which turn in opposite directions in a compressor housing without contact with very tight clearances. They are synchronized via a precision gear. As the claw moves over the suction connection and the axial suction channel inlet the gas is sucked into the compression/pumping chamber.
As the rotors revolve, the gas moves from the suction side to the pressure side. It is then 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 %.
Afterwards the pre-compressed gas 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
C-VLR Claw Vacuum Pumps
Capacities ranging from 60 to 1140 m3/hr and ultimate vacuum at continuous operation is 100, 150 or 200 mbar (abs). Highly efficient, oil-less and contact free operation. Excellent pumping capacities throughout the entire vacuum range.
Integrated air-cooling without the need for water cooling. Available with optional variable speed drive and low maintenance; wide range of applications.
C-DLR Claw Compressors
Capacities ranging from 56 to 600 m3/hr; maximum pressure in continuous operation up to max. 2.0 bar. Highly efficient, oil-less and contact free operation. Excellent pumping capacities throughout the entire vacuum range. Integrated air-cooling without the need for water cooling. Available with optional variable speed drive and low maintenance; wide range of applications.
C-KLR Claw Combination Pressure Vacuum Pumps
Capacities ranging from 80 to 140 m3/hr, vacuum up to 18 in, Vacuum up to – 0.6 bar and pressure up to+ 1.0 bar. Highly efficient, oil-less and contact free operation.
Vacuum and pressure operating points are virtually independent of each other with excellent flow capabilities. Integrated air-cooling without the need for water cooling. Integrated after cooler for low temperature compressed air delivery. Low maintenance; wide range of applications.