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Belzona® Repairs A Screw Pump



Pulp & Paper (PLPR)



Wall Problem Areas (WPA)


Customer Location:

Leningradsky District, Russia


Application Date:

October 2010


Application Situation:

Screw pump at a pulp and paper plant.



After more than 20 years in service, a 10 mm wide isolation joint between the gutter and screw extended to 20-30 mm due to concrete wearing out, which has led to a significant efficiency loss of the pump.



Belzona 4111 (Magma-Quartz)

Belzona 4911 (Magma TX Conditioner)

Belzona 5811 (Immersion Grade)





Application Method:

Gutter walls and sump were cleaned using high pressure equipment. Old concrete was removed from the gutter using a pneumatic tool. After the surface preparation, Belzona 4111 was applied on the gutter to restore the geometry of the surface. Belzona barrier coating was then applied on the gutter walls to provide chemical resistance.


Belzona Facts:

The repair was carried out with no disruption to the production, which was crucial for the client due to cost implications. Due to the complexity of the application, competitors offered to complete the repair in 2 to 3 months’ time as only two screw pumps were holding all the gutters at the plant and sewage treatment facilities were operating with no reserves. As a result of comprehensive maintenance experience and technical capabilities of the products, Belzona completed this repair in just 3 weeks, saving time and costs associated with work for the client.


Photographs Description

  1. General view of two screw pumps
  2. Cleaning of the gutter using high pressure equipment in progress
  3. The depth of the applied material shown
  4. Application of Belzona 5811
Case study pic one


 Case study pic two


 Case study pic three


 Case study pic four


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