KHIA headerKnow-How in Action

VOL XXXII, NO 124

Belzona® Protects Pump Impeller From Cavitation

 
 

Industry:

Fluid Flow (FLOW)

 
 

Application:

Centrifugal Pumps (CEP)

 
 

Customer Location:

Chemical Plant, Scotland, UK

 
 

Application Date:

June 2013

 
 

Application Situation:

A pump impeller 

 
 

Problem:

A pump impeller was found to be suffering heavily from cavitation whilst in service. Characteristic cavitation damage was found on the impeller vanes. The cause of the cavitation issue could not be eliminated from the pump. 

 
 

Products:

Belzona 1311 (Ceramic R-Metal)

Belzona 1341 (Supermetalglide)

Belzona 2141 (ACR Elastomer)

 

Substrate:

Brass

 
 

Application Method:

The application was carried out in accordance with Belzona System Leaflets CEP-1 and CEP-3. The impeller was first grit blasted, then the damaged areas of the vanes were rebuilt using Belzona 1311. The impeller was then coated using Belzona 1341 and Belzona 2141 to protect from future damage. 

 
 

Belzona Facts:

The alternatives were weld repairs or replacement. Both would experience the same effects and become damaged as before. The Belzona 2141 system has excellent resistance to cavitation damage, avoiding costly replacement and extending the life of the current impeller. 

 
 

Photographs Description

1. Damage apparent over the impeller vanes

2. Close up of cavitating areas

3. Belzona coatings being applied

4. Finished application

 
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