Rotary Lobe Pumps

Elmo Rietschle’s rotary lobe pumps are designed for high-performance, dry running vacuum and compression applications. Known for their robust construction and reliability, these pumps provide energy-efficient and maintenance-friendly solutions across a wide range of industries.

R Series – Rotary Lobe Blowers

The R Series includes R-WVB, R-WPB, and R-VWP models, featuring triple and twin lobe designs. These compact rotary lobe blowers operate as dry running positive displacement pumps, meaning there is no need for oil or grease in the compression chamber. Only the gearbox and bearings, which are completely separated from the pumping chamber, require oil lubrication.

Two non-contacting triple lobe rotors rotate against each other in the compression chamber, ensuring smooth conveyance of air or gas mixtures. This design eliminates pulsation problems commonly experienced in conventional blowers. Each blower is factory customised to meet the specific demands of individual applications, allowing flexible and efficient operation.

The blowers are available in several configurations:

• Basic units – Single blower stage, motor not included
• Compact units – Integrated motor for plug-and-play operation
• Compact units with acoustic enclosure – Reduced noise levels for sensitive environments

R-VWP – Twin Lobe Vacuum Pumps

R-VWP twin lobe pumps are ideal for applications requiring either coarse or fine vacuum. Two symmetrically shaped rotors rotate against each other, synchronised by a precision gear set. These pumps run completely dry in the compression chamber, while the gearbox and bearings remain oil lubricated.

A bypass valve integrated into the housing allows the pump to start together with a backing pump. This prevents motor overload at high differential pressures and ensures smooth system operation.

R-VPR and R-VPA – Vacuum Pump Stands

When both high suction capacity and end vacuum are required, Elmo Rietschle offers pump stands combining rotary lobe pumps with oil lubricated rotary vanes or screws as backing pumps.

• R-VPR – Oil lubricated rotary vanes with rotary lobe boosters, primarily used for industrial fine vacuum applications.
• R-VPA – Rotary vane backed booster sets, designed for industrial and chemical processes that require high-performance evacuation.

These pump stands deliver precise vacuum control and are engineered to meet the specific requirements of complex industrial operations.

Advantages at a Glance

• Robust and economical design
• Modular construction for easy maintenance and scalability
• Available as single aggregates or individually engineered pump sets
• Variable speed drive available for energy-efficient operation
• Dry running compression chamber reduces contamination risks
• Reduced noise and vibration for sensitive environments

Elmo Rietschle rotary lobe pumps are versatile and suitable for multiple industries, including:

Central Vacuum Systems

Rotary lobe pumps serve as efficient central vacuum sources for industrial and commercial operations.

Chemical Industry

Ideal for processes requiring precise vacuum and contamination-free operation, including solvent recovery, gas stirring, and vacuum filtration.

Coating Technologies

Used in vacuum coating systems, paint application processes, and surface treatment where uniform suction and pressure are essential.

Environmental Engineering

Applications include:

• Central vacuum systems
• Domestic wastewater treatment
• Drying and filter rinsing
• Gas stirring and sludge oxygenation
• Tank aeration
• Vacuum tankers

Food & Beverage Industry

Rotary lobe pumps provide dry, contamination-free vacuum for:

• Aeration
• Vacuum filling
• Packaging operations
• Drying processes

These pumps are suitable for aeration, dust extraction, drying systems, and general process vacuum applications.

• Process Engineering
  Rotary lobe pumps deliver precise and reliable vacuum for chemical reactions, laboratory systems, and production processes.
• Industrial Furnaces and Metallurgy
  Used in vacuum metallurgical processes and industrial furnaces to maintain controlled atmospheres.
• Pharmaceutical Industry
  Provide oil-free vacuum for sensitive pharmaceutical processes, including tablet coating, packaging, and sterilisation.
• Pneumatic Conveying
  Rotary lobe pumps are used in conveying powders, granulates, and other materials through vacuum-driven systems.

Elmo Rietschle rotary lobe pumps combine high reliability with low maintenance and energy-efficient operation. The modular and customizable designs allow easy integration into existing systems, and the dry running operation eliminates contamination risks. Variable speed drives improve efficiency and reduce energy consumption, while robust construction ensures long service life, even under demanding industrial conditions.

For industries requiring high vacuum performance, contamination-free operation, and reliable vacuum generation, Elmo Rietschle R Series rotary lobe pumps remain a trusted solution. Whether used as standalone units, compact assemblies, or pump stands with backing pumps, these rotary lobe systems deliver flexibility, efficiency, and consistent performance.

Pneumatics & Sensors Ireland are official distributors in Ireland for all Elmo Rietschle products and components. We have in-depth knowledge of all Elmo Rietschle products and their applications, and can advise on any installation or replacement. To learn more, contact us today.

Downloads

• R Series Catalogue