Rotary Lobe Pumps

R Series – Rotary Lobe Blowers

R-WVB, R-WPB – Triple lobe These compact rotary lobe blowers belong to the group of dry running positive displacement vacuum pumps (R-WVB) and compressors (R-WPB). This means that there is no need for oil or grease in the compression chamber. Only gear box and bearings, which are separated from the pumping chamber, are oil lubricated. Two non-contacting triple lobe rotors rotate against each other in the compression room. The triple lobe rotors avoid pulsation problems while conveying air or gas mixtures.

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The blowers are factory customized to cater for the varying demands of our customers‘ applications.

The blowers are available as:

  • basic units (one blower stage, no motor)
  • compact units
  • compact units with acoustic enclosure R-

VWP – Twin lobe Rotary lobe vacuum pumps R-VWP can be used in many applications that need coarse or fine vacuum. Two symmetrically shaped rotors rotate against each other, synchronized by a pair of gear wheels. The pumps are dry running, and consequently the compression chamber is free of grease or oil. Gear box and bearings are oil lubricated. A bypass valve integrated in the housing enables the start of the pump together with the backing pump to avoid an overload of the motor at high differential pressures.

R-VPR, R-VPA – Vacuum pump stands Pump sets consisting of oil lubricated rotary vanes or screws as backing pump in combination with rotary lobe vacuum pumps as booster pump are used when both high end vacuum and suction capacity are required. The Elmo Rietschle R-VPR pump stand consists of oil lubricated rotary vanes and rotary lobe vacuum pumps; their main applications are to be found in industrial fine vacuum. The R-VPA standard pump sets use fresh oil lubricated rotary vanes as backup for the booster. Evacuation applications in industrial and chemical processes are their main field of use.

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Advantages at a glance

  • Robust and economical
  • Modular design
  • Available as single aggregate
  • Available as individually engineered pump sets
  • Variable speed drive available


  • Central vacuum systems
  • Chemical industry
  • Coating technologies
  • Environmental engineering: Central vacuum systems, Domestic wastewater systems, Drying, Filter rinsing, Gas stirring, Sludge oxygenation, Tank aeration, Vacuum tankers, Wastewater treatment
  • Food & beverage industry
  • Industrial applications: Aeration, Drying, Dust extraction
  • Process engineering
  • Industrial furnaces
  • Metallurgy
  • Pharmaceutical industry
  • Pneumatic conveying