Elmo Rietschle
Liquid Ring Vacuum Pumps

Extreme conditions, which prevail in humid and wet processes, lead to lime scale or abrasion, and hence to a considerable reduction in the performance of the pump. Elmo Rietschle liquid ring pumps, however, meet these challenges.  The use of high-quality materials such as stainless steel and ceramics ensure utmost reliability and constant operating characteristics – for years to come.
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Operating Principle L-Series
Compression in L-Series pumps follows the liquid ring principle. The impeller is the only moving part inside the pump. It rotates without contact within the pump casing. A rotating liquid ring seals the impeller on the front and seals its blades against one another. In order to keep the liquid ring stable, liquid is also permanently sucked into the compression chamber and is output together with the conveyed gas.The excentrical arrangement of the impeller within the casing creates variable compression chambers between the impeller blades during rotation, which causes the conveyed gas to be compressed within a full revolution.Since the pumps always create a pressure difference during operation, they can also be used as compressors when pumping gas from the surrounding atmosphere.The L-BV product line features a patented discharge-air cooling system which returns the condensate to the operating liquid.

Elmo Rietschle Liquid Ring Vacuum Pumps
L-BV2

  • The monoblock construction is particularly suited for use in the plastics and medical industries.
  • Available in combinations of materials such as stainless steel, bronze, ceramic and cast iron with ceramic coating.
  • Long-term resistance to erosion and corrosion.
  • Reinforced stainless steel shafts in the pump section.
  • Roller bearings with additional lubricant reservoir provide safe and maintenance-free operation even under heavy loads.
  • Volume flow 15.9 to 85.3 cfm
  • IE3 / Nema Premium is standard

Please contact CompreVac for application assistance with vacuum pumps and associated equipment.

Elmo Rietschle Liquid Ring Vacuum Pumps L-BV2

Elmo Rietschle Liquid Ring Vacuum Pumps
L-BV5

  • Up to 50% less water consumption
  • Pump body also available in full stainless steel
  • Long-term resistance to erosion and corrosion.
  • Reinforced stainless steel shafts in the pump section.
  • Roller bearings with additional lubricant reservoir provide safe and maintenance-free operation even under heavy loads.
  • Volume flow 52.9 to 352.9 cfm
  • Suction pressure up to 33mbar(a)

Please contact CompreVac for application assistance with vacuum pumps and associated equipment.

Elmo Rietschle Liquid Ring Vacuum Pumps L-BV5

Elmo Rietschle Liquid Ring Vacuum Pumps
L-BV7

  • Up to 50% less water consumption
  • Pump body also available in full stainless steel
  • Long-term resistance to erosion and corrosion.
  • Reinforced stainless steel shafts in the pump section.
  • Volume flow 15.9 to 85.3 cfm
  • Suction pressure up to 33mbar(a)

Please contact CompreVac for application assistance with vacuum pumps and associated equipment.

Elmo Rietschle Liquid Ring Vacuum Pumps L-BV7

Elmo Rietschle Liquid Ring Vacuum Pumps
The Amazing and Unique L-BL2

  • The L-BL2 range comprises compact plug-and-play systems for easy on-site installation.  Can be used for Portable Vacuum Pump anywhere in your facility.
  • Closed water circuit - no need to supply fresh water
  • The pumps are air-cooled, 100 % oil-free and do not require additional water during operation.
  • In addition, the vacuum pumps provide a much higher resistance to water and steam than alternative systems.
  • Thanks to contact-free compression, they are virtually wear-free in operation and need no periodic maintenance.
  • The patented discharge-air cooling system ensures that the pumps will not heat up by more than 15 K above room temperature.
  • The pumps work reliably in continuous operation and are steam resistant and insensitive to condensation of the pumped air.
  • Volume flow 15.9 to 705.9 cfm
  • Suction pressure up to 33mbar(a)

Please contact CompreVac for application assistance with vacuum pumps and associated equipment.

Elmo Rietschle Liquid Ring Vacuum Pumps L-BL2

Compact version
Also known as the Elmo Rietschle "pump in the box", these portable units are oil-free and air-cooled. They include an L-BV liquid ring pump, an industrial electric motor, discharge separator, seal water cooler and discharge air cooler.

Split units
The L-BL2 split range family of pumps allow the user to take advantage of the L-BL technology in applications where higher air volume is needed or for special process requirements.  They are suitable for applications involving aggressive suction materials and can also be implemented e.g. in the food & beverages industry where they are available in versions made entirely of stainless steel.  We also offer versions equipped with all the valves including tubing required for integration into a CIP cleaning process.  Air-to-water heat exchangers or plate heat exchangers are also available.