Lobee Pump and Machinery Company
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LobeeSelf Priming Liquid Ring Pumps

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The Lobee liquid ring pumps operate opposite how typical liquid rings pumps do… They do not compete with the volumetric output and efficiencies of dedicated air/gas liquid ring pumps. The Lobee LR pump handles a higher liquid flow and a minor air/gas flow against a negative pressure environment. So, compared to other manufacturers which can flow a large volume of air/gas at various vacuum levels, our liquid ring pumps of comparable HP will pump only 15-20% air/gas volume in the same vacuum environment…but ours will pump 1,000% more lower viscosity liquids (40 SSU or less).

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Conventional liquid ring pumps deliver a higher ACFM air/gas with a minimal liquid flow capability, whereas the Lobee LR pumps deliver minimal air/gas with a higher fluid flow. Historically our pumps have been used to augment processes in which a stand alone vacuum pump cannot handle the amount of fluid that needs to be evacuated. So the dedicated vacuum pump evacuates the air/gas mass at what ever requirement and our liquid ring handles or evacuates the liquids. An example would be the plastics industry for this type of application.

On applications where the air/gas evacuation demand is low, say < 20 ACFM, but fluid evacuation is relatively higher, our liquid ring works very well because it handles this ratio of air/gas to liquid very efficiently…

Lobee Liquid Ring Pumps are ideal for many applications not practical for other pumps. They will pump small capacities at high heads and self prime up to 28 foot maximum suction lift (sea level) producing its rated capacity despite air pockets or siphons in the suction line. Pumps water, air, vapor or any combination of each without hammering or pounding.
Simple in construction, only one moving part, and foolproof in operation. It requires no priming chamber, no foot or check valves, no springs, pistons or gears. Complete axial and radial balance of impeller reduces bearing loads to a minimum. Impeller is keyed to shaft but is free to float axially and center itself in the casing, maintaining liquid films between its faces and the casing walls requiring no need for adjusting the clearance.
The liquid being pumped acts as a piston in the pump. Without metal-to-metal contact, there is little wear or maintenance.

  • Refineries-fluid transfer
  • Machine Tool-coolant & lubricant circulation
  • Marine-bilge pump, fresh water
  • Agriculture-water, fertilizer
  • Plastics-vacuum holding, forming
  • Manufacturing Facilities-fluid transfer, portable or stationary filtration pump systems
  • Power Plants & Utilities-fluid transfer
  • Priming systems for centrifugal pumps
  • High suction lift
  • Vacuum heating systems
  • Condensate service
  • Residential/basement water pumps
  • Oil transfer service
  • Sanitary drinking water supply
  • Volatile non-hazardous liquids
  • Foaming liquids
  • Non-lubricating liquids