Cut your energy bill

AGISTAR™ SSA reduces power consumption in pulp mill fiber recovery

Energy savings are high on the daily agenda. Our customer, a leading European pulp and paper producer, was keen to cut the energy bill by installing Sulzer’s AGISTAR SSA agitator.

Riverfront paper mill with large wood chip storage pile

The challenge

  • Saving energy in an optimized process
  • Cutting the energy bill without compromising the process up-time
  • Keeping the agitation level

The project

  • The AGISTAR SSA was installed in a fiber recovery tank in the wastewater treatment process with a pulp consistency of 2-5%.
  • The previous agitator was equipped with a variable speed drive and optimized with reduced speed.

The solution

We delivered an AGISTAR SSA to replace the existing cantilever type of agitator: 

  • Supply and install of one agitator AGISTAR SSA60
  • Application of newly developed high efficiency EX3 propeller
  • Sturdy bearing frame with a minimal bearing lifetime of 200 000 hours
  • Strong and reliable belt drive unit
  • The existing motor and frequency converter were utilized
We continuously strive to lower the environmental impact and increase the competitiveness of our customers. Patrik Kolmodin, Product Line Manager Agitators

Customer benefits

  • The pulp and paper mill was able to cut the power consumption with 3 kW, while keeping the same agitation level. This is a significant achievement, considering that the previous agitator already had reduced operating speed through a frequency converter.
  • New efficient EX3 propeller, robust construction, high flexibility, and service-friendly design
  • Smooth and quick installation
  • Very low vibration levels
  • AGISTAR SSA side-mounted agitators
    AGISTAR™ SSA side-mounted horizontal agitators are designed to decrease the power consumption with ground breaking efficient hydraulics.
Installation data


Agitator size SSA60-B
Propeller EX3-800 with adjustable blade angles
Seal Gland packing
Motor power 15 kW
Drive Belt drive unit with frequency converter
Tank volume 10 m³
Pulp consistency 2-5%
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