HOLED HYDRO TURBINE RUNNER REPAIRED WITH BELZONA
Industry: Water / Wastewater (WATR)
Application: CEP-Centrifugal Pumps (CEP)
Substrate: Steel
Customer Location: Hydroelectric plant, Vermont
Application Date: January 2007
Products:
Belzona® 1121 (Super XL Metal)
Belzona® 1341 (Supermetalglide)
Problem: Entrained solids and cavitation caused severe damage to the edges of the runner. Holes and pitting are evident on the runner vanes.
Photograph Descriptions
- Damaged runner with holes
- Damaged runner with holes
- Grit blasted clean and ready for coating
- Finished runner
Application Situation
Hydro Turbine runner with severe erosion damage
Application Method
Application carried out in accordance with CEP-3 & CEP-5. In-situ blast to near white metal finish, rebuilding to fill pits and holes finally overcoating with two coats Belzona® 1341.
Belzona Facts
Runner replacement would be a several million dollar process involving total removal of the generator sets and dismantling of the penstock. It was not an option. Rebuilding and protection with Belzona will prolong service life.
