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Belzona® Repairs Oil Leaks On Wind Farm Transformer



Power (POWR)



Gaskets, Seals and Shims (GSS)


Customer Location:



Application Date:

September 2017


Application Situation:

Transformer for a wind farm was leaking oil through the main flange and flange bolt holes. Approxiately 120 bolts were leaking.



The transformer was leaking oil and required a fix which could be carried out within a short outage (5 days).



Belzona 1161 (Super UW-Metal)

Belzona 5811 (Immersion Grade)



Mild Steel


Application Method:

Application was carried out in accordance with a modified version of Belzona Know-How System Leaflet GSS-8. Stainless steel caps were fabricated to fit over the bolt heads and the nuts. The gap in between the transformer body and the top cover was filled with Belzona 1161. The caps were filled with Belzona 1161 and clamped onto the bolt heads and nuts. The repair was coated with Belzona 5811


Belzona Facts:

The alternative to the Belzona repair was a cover lift of the transformer and fitting a new gasket. This would have taken several weeks and would have come at a much higher cost. The Belzona solution was completed in 5 days.


Photographs Description

1. General view of the transformer

2. Leaking oil on the flange

3. Flange face filled with Belzona 1161 and caps installed

4. Completed section

Case study pic one


 Case study pic two


 Case study pic three


 Case study pic four


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