KHIA headerKnow-How in Action

VOL XXII, NO 12

Cavitation Damage In Pump Repaired

 
 

Industry:

Power (POWR)

 
 

Application:

Centrifugal Pumps (CEP)

 
 

Customer Location:

Power Plant / NE Oklahoma

 
 

Application Date:

March 2007

 
 

Application Situation:

Suction bell of pump found to be cavitated during 1 week outage.

 
 

Problem:

Severe cavitation erosion above and below wear ring. limited time to restore pump.

 
 

Products:

Belzona® 1221 (Super E-Metal)

Belzona® 2141 (ACR Elastomer)

 

Substrate:

Cast carbon steel (5% Nickel)

 
 

Application Method:

Application carried out in accordance with Belzona Know-How System Leaflets CEP-3 and CEP-5. Rebate grooves were cut to terminate coating.

 
 

Belzona Facts:

Belzona repair and protective coating combined with 1-week turnaround saved approx. $15,000 versus purchase of new unit with much longer lead time. Improved resistance to cavitation anticipated.

 
 

Photographs Description

  1. Extent of cavitation damage to suction bell, above and below wear ring 
  2. Repairing damage back to original dimensions 
  3. Repaired surface rebated, taped and half coated with Belzona® 2141 
  4. Finished job ready for bushing installation then into service
 
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