KHIA headerKnow-How in Action

VOL XXIII, NO 106, ELITE

Pump Diffuser Repair Surpasses All Expectations With Belzona®

 
 

Industry:

Power (POWR)

 
 

Application:

Centrifugal Pumps (CEP)

 
 

Customer Location:

National Electricity Provider, Malta

 
 

Application Date:

May 2000

 
 

Application Situation:

Sea water cooling system pump for a 60 MW turbine.

 
 

Problem:

Efficiency losses and pump breakdown due to severe erosion-corrosion of the single vertical axial flow pump (7090 m³/h). Prior to the Belzona solution, the client had to replace the pump components annually. As a significant local electricity supplier, downtime of this critical equipment caused major problems.

 
 

Products:

Belzona® 1311 (Ceramic R-Metal)

Belzona® 1321 (Ceramic S-Metal)

Belzona® 5811 (Immersion Grade)

 

Substrate:

Cast Iron

 
 

Application Method:

The application was carried out in accordance with Belzona Know-How System Leaflets CEP-1, CEP-3 and CEP-4.

 
 

Belzona Facts:

The customer was surprised that the eroded equipment could be repaired and delighted with the vastly improved reliability and performance. The pump casing and suction bell were also coated and protected internally and externally. After 9 years in service, the coating was found to still be in excellent condition.

 
 

Photographs Description

  1. Condition of the pump diffuser after 1 year in service
  2. Rebuilding of the vane profiles
  3. The finished application
  4. Application after 9 years 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