IMPELLER AT NUCLEAR PLANT REPAIRED AND PROTECTED WITH BELZONA

KHIA ID: 1409
Industry: Power (POWR)
Application: CEP-Centrifugal Pumps (CEP)
Substrate: Aluminum Bronze
Customer Location: Nuclear Power Plant, North Carolina
Application Date: August, 2009
Products:

Belzona® 1341 (Supermetalglide)

Belzona® 1121 (Super XL-Metal)

Belzona® 2141 (ACR Elastomer)

Problem: A combination of de-Alumininification over the surface of the impeller and cavitation at root of the vanes was causing a significant reduction in the efficiency of this pump.
Photograph Descriptions
  1. Impeller before application of any product
  2. Application of the 1st layer of Belzona® 1341
  3. Application of the smoothing layer of Belzona® 1121
  4. Belzona® 2141 applied to complete the job
Application Situation
Cooling tower Recirculation pump impeller.
Application Method
The application was carried out in accordance with Belzona Know-How System Leaflets CEP-1, -3, -5 & -10. Belzona® 1121 used to smooth the surface prior to application of Belzona® 1341 system. Belzona® 2141 was then applied 8" on either side of the vanes to protect from cavitation.
Belzona Facts
The cost of labor and product was much lower than the cost to replace the impeller. From current draw, the application has also increased the efficiency of the pump, but no formal efficiency increase have been calculated.
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