KHIA headerKnow-How in Action


So-Called "Unrepairable" Pumps Restored With Belzona



Steel (STEL)



Centrifugal Pumps (CEP)


Customer Location:

Copper Processing Plant, Bulgaria


Application Date:



Application Situation:

2 ten-year-old 500 LNN 1000 (single stage, double sction) pumps.



The pumps had to work 24 hours per day for a continuous period of 5500 hours (approximately 229 days). They were experiencing serious corrosion and some erosion from the cascade of return water from the dam containing active chemical reagents (pH from 2.5 to 8), as well as a small amount of solids.



Belzona 1311 (Ceramic R-Metal)

Belzona 1341 (Supermetalglide)



Stainless Steel


Application Method:

Application was carried out in accordance with Belzona Know-How System Leaflets CEP-1, CEP-2 and CEP-3. 104 kilos of Belzona 1311 and 22 kilos Belzona 1341 were used.


Belzona Facts:

The cost of purchasing  a new pump of the same size was about €35,000 - €40,000 (and only offering a 12 month warranty) compared to Belzona restoration and protection at €9,000.


Photographs Description

1&2. The corroded pumps
3.  The Belzona application underway with Belzona 1311 used to restore original profiles

4. The completed application with Belzona 1341 applied to provide overall corrosion protection

Case study pic one


 Case study pic two


 Case study pic three


 Case study pic four


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