KHIA headerKnow-How in Action

VOL XXIV, NO 22, ELITE

Belzona® Proven Cavitation Protection To Francis Turbine

 
 

Industry:

Power (POWR)

 
 

Application:

Centrifugal Pumps (CEP)

 
 

Customer Location:

Hydroelectric plant, Slovakia

 
 

Application Date:

2004 and 2007

 
 

Application Situation:

Francis turbine runner

 
 

Problem:

Cavitation had caused erosion of the metal and loss of turbine performance. Belzona® 1311 and Belzona® 1341 had been applied in 2004, but had suffered further cavitation, so system upgraded by applying more cavitation resistant Belzona® 2141.

 
 

Products:

Belzona® 1311 (Ceramic R Metal)
Belzona® 1341 (Supermetalglide)
Belzona® 2141 (ACR Elastomer)

 

Substrate:

Cast Iron

 
 

Application Method:

Application was carried out in accordance with Belzona Know-How System Leaflets CEP-3 and CEP-10

 
 

Belzona Facts:

Inspection of the Belzona Ceramic coating in 2006 showed damage from cavitation, so specification was changed to Belzona® 2141. Futher inspection after 2 years showed no damage on the turbine runner.

 
 

Photographs Description

  1. Cavitation damage to turbine runner 
  2. Belzona® 1341 showing some cavitation damage 
  3. Belzona® 2141 being applied to the runner 
  4. After 24 months service Belzona® 2141, inspection shows no further cavitation damage
 
Case study pic one

 

 
 Case study pic two

 

 
 Case study pic three

 

 
 Case study pic four

 

 
 
For more information about Belzona visit: www.belzona.com