KHIA headerKnow-How in Action


Belzona® Lobe Repairs Avoid Delays



Water / Wastewater (WATR)



Positive Displacement Pumps (PDP)


Customer Location:

Water treatment plant, Canada


Application Date:

February 2001


Application Situation:

Rotary lobe pumps used in waste water treatment plant. The lobes have a diameter of 70 cm and a thickness of 13 cm.



the rubber lobes wear but there is a delay of 4-6 weeks for the delivery of these lobes.



Belzona® 2131 (D&A Fluid Elastomer)





Application Method:

The application was carried out in accordance with Belzona Know-How System Leaflet PDP-9. A mould, lined with Belzona® 1341 was created from new lobes and used to cast replica lobes using Belzona® 2131 around the steel centres which are grit blasted to achieve maximum adhesion. 


Belzona Facts:

Many lobes have been produced using this process. This method is not cheaper but it reduces stock and saves a lot of production time by avoiding supply delays.


Photographs Description

  1. Preparation of the mould coated with Belzona® 1341 
  2. Lobe position in the mould 
  3. The newly cast lobe in the mould 
  4. The lobe is ready to be back in service.
Case study pic one


 Case study pic two


 Case study pic three


 Case study pic four


For more information about Belzona visit: