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