Pressure and vacuum in single stage from claw pump
A
Rietschle Thomas product story
Edited by the Engineeringtalk editorial team
Jul 12, 2001
Rietschle's Zephyr KLR pressure/vacuum pump series, on show at PPMA 2001, is the first claw pump capable of producing pressure and vacuum in a single stage.
Centrepiece of Stand No 655 at PPMA 2001 is a cut-away model from Rietschle's Zephyr KLR pressure/vacuum pump series.
Other non-contact designs on display include the high capacity Shark rotary lobe range, plus Covac and Bora side channel designs.
These dry-running compressors and vacuum pumps have applications across industry.
At the heart of the Zephyr KLR is a patented, three lobe claw system, making it the first claw pump capable of producing pressure and vacuum in a single stage.
The use of intermediate suction ports makes it a highly efficient pressure/vacuum design, and unlike single claw pumps it offers constant compression.
The triple-lobe claw also dampens pulsation in the suction and discharge pipe work, further reducing the noise level of the pump.
Unlike traditional rotary lobe designs, the operating efficiency of the Zephyr KLR - and hence its low installed motor power, is achieved by internal compression of the gas.
The multi-claw has no (wear sensitive) discharge valves, since the rotation of the claws opens and closes the suction and discharge channels.
Maintenance is kept to a minimum, since the contra-rotating claws operate without contact.
Fine tolerances are maintained by a high precision gear drive and hence, neither lubrication, nor wearing part replacements are needed in the pump chamber.
Zephyr KLR offers vacuum up to 600 mbar (abs), and pressure up to 1 bar overpressure, simultaneously, during continuous operation.
Five models offer nominal capacities from 100m3/hour to 500 m3/hour, and an optional integral frequency converter is offered to exactly adjust capacity and vacuum/pressure, to customer requirements.
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