KHIA headerKnow-How in Action


Belzona® Repairs Cyclone Inlet



Pulp & Paper (PLPR)



Solids Handling Machinery (SHM)


Customer Location:

Paper Mill, Michigan U.S.A.


Application Date:

October 2008


Application Situation:

 The pulp cyclone removes scrap metal, stones, glass and other heavy abrasive debris from the pulp prior to screening.



The inlet to the pulp cyclone showed severe erosion corrosion after only 8 months of service. It had already been patched once and had holed through again.



Belzona® 1812 (Ceramic Carbide FP)
Belzona® 1321 (Ceramic S Metal)


Cast Iron


Application Method:

Application carried out in accordance with Belzona Know-How System Leaflet SHM-11. A polycarbonate flange form was bolted on the casting and Belzona® 1812 applied to fill the eroded shell and rebuild the damaged flange area. The interior was coated with Belzona® 1321 to provide a smooth the surface and the flange form was removed.


Belzona Facts:

A replacement fitting was quoted at $25,000 and six weeks delivery. The Belzona material used in this repair cost less than $2,000. When the fitting currently in use is replaced by this fitting, it too will be repaired with Belzona abrasion resistant lining. The mill thus has a low cost durable back-up part ready for service.


Photographs Description

  1. The fitting in the repair area
  2. Flange form installed. Internal damage evident
  3. Belzona® 1321 being applied over the Belzona® 1812
  4. Completed repair
Case study pic one


 Case study pic two


 Case study pic three


 Case study pic four


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