KHIA headerKnow-How in Action

VOL XXV, NO 21

Belzona® Refurbishment Of Fan Hub Saves Time And Money

 
 

Industry:

Buildings & Structures (BSTR)

 
 

Application:

Centrifugal Pumps (CEP)

 
 

Customer Location:

Power Plant, Turkey

 
 

Application Date:

December 2010

 
 

Application Situation:

Cooling Tower Fan Blade case, diameter 1854mm, width 537mm

 
 

Problem:

Erosion/Corrosion following failure of previous coating. If allowed to continue could cause severe damage to the fan.

 
 

Products:

Belzona® 1111 (Super Metal)

Belzona® 1391(Ceramic HT)

 

Substrate:

Steel

 
 

Application Method:

application was carried out in accordance with Belzona Know-How System Leaflets FBC-4 & FBC-2. Formers were used to achieve correct profile for blade sockets.

 
 

Belzona Facts:

Belzona restored the eroded surfaces. Alternative method by welding might cause distortion and its machining process is laborius and expensive, besides thermal stress could have a negative effect on balance as fan operates at 750rpm. Belzona solution is corrosion resistant, straight forward, time and cost effective. It saved time and avoided start-up delay.

 
 

Photographs Description

  1. Badly corroded case especially bottom side of fan blades
  2. Wire mesh and formers cut by CNC used to achieve correct profiles
  3. Application of Belzona® 1111 to case with templates in place to form fan pockets
  4. Finished application. Rebuild and protective coating applied. Checking each hole by installing fan blade
 
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