KHIA headerKnow-How in Action


Belzona® Repairs Vacuum Pump



General Industry (GIND)



Positive Displacement Pumps (PDP)


Customer Location:

Engineering Co., Svetogorsk, Russia


Application Date:

November 2008


Application Situation:

Liquid ring vacuum pump.



Pump casing, impeller and end plates damaged by erosion and corrosion as a result of  handling medium contaminating the water seal, leading to a rapid loss in efficiency.



Belzona 1311 (Ceramic R-Metal)

Belzona 1321 (Ceramic S-Metal)



Cast iron


Application Method:

The application was carried out in accordance with Belzona Know-How System Leaflets PDP-5 and PDP-6. The profiles were restored with Belzona 1311 before coating with Belzona 1321 to provide overall erosion-corrosion protection.


Belzona Facts:

Belzona was the first choice for the customer as a similar repair was completed by Belzona in 2000, which remained in a perfect condition following an inspection after 5 years in-service time with only insignificant colour change of the Belzona material. The client was impressed by the speedy application and long term performance of the equipment with no maintenance work required as a result of excellent protection provided by Belzona materials.


Photographs Description

  1. Surface preparation of pump impeller
  2. Repair of the damaged pump rotor in progress
  3. Close up view of restored side of the pump
  4. Completed repair of the pump rotor and casing
Case study pic one


 Case study pic two


 Case study pic three


 Case study pic four


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