HOLED HYDRO TURBINE RUNNER REPAIRED WITH BELZONA

KHIA ID: 855
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
  1. Damaged runner with holes
  2. Damaged runner with holes
  3. Grit blasted clean and ready for coating
  4. 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.
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