High consistency refiner segments

By optimizing the refining process and refiner segments, mills operational costs and product quality can be greatly affected.

In the field of refining, Valmet is continuously developing new refiner segment technology to improve customers’ competitiveness. As a result of this we can now present a new unidirectional segment concept called ServoNavitas.

Combining a number of innovations

Valmet’s new concept combines a number of patented innovations and details. The use of features in ServoNavitas is made based on customer needs and refiners operation.

ServoNavitas offers an effective patented, segment design toolbox to change the basics of refining. Energy consumption, fiber quality and segment lifetime can all be tuned to new levels.

Valmet can optimize your refiners

Valmet has a long tradition of serving customers on all continents. We have gained detailed knowledge for most types of refiners, both self installed as well as those made by our competitors. We are now willing to start collaborating with our customers and committing ourselves to optimizing refiner processes with new technology.

Custom-made segments

Valmet offers customers an extensive contact network, experienced refiner specialists, effective refiner segment design toolbox with patented features and the most effective research and development support. Our philosophy is that every refiner is unique and needs custom designed refiner segments

There is always a higher level

There are limits. But honestly, do we know exactly when the limit is reached? Our brains create solutions to problems based on the information at hand and then we think we’ve reached the limit. We regard this as “state-of-the-art” technology. We optimize the processes and then often stabilize them at that level. Some engineers might feel satisfied at this point, but at Valmet we don’t.

Where do you want to go?

There is always a higher level

Valmet has developed superior refiner segment concepts for all processes.



production cost reduction

Refiner Segments – Turbine segments

Energy-saving designs involve spreading the wood flow evenly over the segment rings without loosing speed.

Refiner Segments - Attack bar

Inclined bars for sharper leading edges and cleaner grooves as well as energy saving over segment lifetime.

Refiner Segments – Low energy

In the Low energy segments the bars form a pumping angle at a very critical area in the disc gap.

Refiner Segments – Quattro feed

Utilizes CD stator inlet in a new way for further improved feeding and more unified fiber distribution.


Improved fiber quality

Refiner Segments - Shive clean

This new technology takes benefit from the fact that in the disc gap steam and fibers are behaving differently.

Refiner Segments – Holdback

Flow optimized feeding pattern.

Refiner Segments - Mild defibration

Innovation for longer and stronger fibers.

Refiner Segments – Edge lock

The unique two-step bar leading edge design of the Edge lock segments makes possible more effective refining of fibers.

Refiner Segments - Low shive

With Low shives segments pulp quality can been improved, shive content reduced and refiners’ operation kept stable.

Refiner Segments - Soft bar

Ensuring smooth and gentle feed, leveling out incoming feed variations.


Optimized refiner operation

Refiner Segments - Super feed

Super feed and Turbine segments center plate improves feeding at the eye of the refiner.

Refiner Segments – Steam lock

Forms a fiber pad to prevent flow back steam entering to refiner feed.

Refiner Segments - High fibrillation

High fibrillation segments give better control of the disc gap and improve the loadability of the refiners.

Refiner Segments - Selective segments

Selective segments feed steam forward in the refiner disc gap.

Refiner Segments - Wear cap

Cap in stator segments shield against hits caused by impurities in fiber flow.