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How to maintain rotary lobe pumps


  1. Rotary lobe pumps usually have both bearings and geared motors both the bearings and gears require lubricating on a regular basis.
  2. Many rotary lobe pumps use mechanical seals these need regular inspection. Particularly if the mechanical seal has bearing oil on the outboard side that could leak into the fluid being pumped.

If you encounter a reduction in performance over time be this flow or pressure, then the internal components may have worn. The solution to this issue is to replace the lobes/wings with oversized replacements and reduce the internal wall thickness to maintain the original tolerances.

PD Pumps Team
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