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We have a solution for
lifetime problems on impellers
by means of protective coatings!

  2. Applications
  3. Pumps / Fluid-Flow-Technology
  4. Impellers - Protective Coatings

Abrasion & Cavitation Protection for Pump Impellers

Pump impellers operate under severe mechanical and hydraulic stress. Solid particle impact, varying liquid viscosity, and abrasive loading continuously attack the blade surfaces and quickly reduce pump efficiency. 

As wear increases, performance drops and maintenance intervals become shorter.

MetaLine® Series 700 coatings provide a permanent elastic, energy-absorbing surface that protects impellers against corrosion, erosion and cavitation.  Instead of deflecting impact energy like hard coatings, the elastomeric material absorbs it and prevents equipment material removal.
MetaLine Series 700 – MetaLine Series 700 coatings absorb destructive impact energy through permanently elastic material properties. Coating thickness is adapted individually to the stress parameters and flow conditions of the pump design. This usually results in 4–5 times higher lifetimes for impellers coated with MetaLine compared to unprotected cast iron designs. Depending on the actual impeller size, coatings up to rotational speeds of approximately 1.500 rev/min. are recommended. The solid content of the pumped medium can be well over 50 %. Constant liquid temperature should not exceed 60 °C (140 °F) on average. Ideal for saltwater (offshore) applications.

Scope of application:

Open impellers
Closed impellers
Single-blade and multi-blade impellers
Non-clogging impellers
Screw impellers
Rubber and polyurethane impellers

 

KSB® Pumps Test Winner

The elastomeric MetaLine coating technology is the great winner of the "KSB® Pumps (Germany) coating test".
In comparison with about 25 international competitors, our energy absorbing material process has established itself with an up to 35 (!) times higher wear resistance!

As the only (!) synthetic coating at all, MetaLine has been classified by KSB® as "... a functional cavitation protection ..."! The erosion resistance was even rated twice as high as the special alloy "Noridur" from KSB®!

The reason for this performance advantage lies in particular in the fact that we rely on energy-absorbing (soft) rather than energy-deflecting (hard) surface properties. This is a great success, but it comes at a price: simply “brush on by yourself” will not lead to success. It is a multi-stage process that must be applied by trained hands!

 

More information

Pump impeller coating
Pump impeller coating – the largest pump impeller ever coated with MetaLine 785. 10 tons of steel being protected by our leading elastomeric spray technology

Technical solutions in detail

MetaLine Series 700 –

MetaLine Series 700 coatings absorb destructive impact energy through permanently elastic material characteristics. The coating thickness is individually adapted to the load parameters and the flow speed of the pump design. As a result, MetaLine coated impellers generally have 4–5 times the service life of unprotected gray cast iron components.

Depending on the actual impeller diameter, our coatings are recommended up to a rotational speed of approximately 1,500 rpm. The solid content of the pumped slurry can be well over 50 %. The fluid temperature should not exceed 60 °C (140 °F) on average. Ideally suited for saltwater (offshore) applications.

 

Product details