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Benefits
• Low operating cost
Evolution Defibrator™ series
• Low electric energy
consumption
• Excellent dewatering
capacity, saves energy in
the dryer
• Low steam consumption
Valmet’s professionals around
the world work close to our
customers and are committed
to moving your performance
forward – every day.
• Minimal water consumption
• Uniform fiber flow,
saves resin
• Easy to operate and
maintain
• Short time to production
• Global service network
• Continuous development.
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Focus on energy reduction
As a result of the latest development
in low-energy unidirectional refiner
segments, Valmet has developed a
unidirectional refiner-grinding
house. The helical fiber path combined with a blow valve that opens in
the direct fiber flow facilitates smooth
discharge possible without any loss
of energy due to turns or choking of
the fiber flow. The optimized spacing around the rotor combined with
highly effective rotor wings minimizes fiber buildup in the housing.
Operation with this geometry – with
normal unidirectional segments –
creates a specific energy saving of
between 25-50 kWh/ton for softwood
fiber at a fiber quality level for furniture panels.
Development of the new generation Defibrator focused entirely on
enhancing efficiency to maximize energy reduction and ensure minimum
resin consumption. Experience from
the L, M and P series was the basis for
the practical operational and maintenance improvements when the new,
evolutionary EVO-series Defibrator
was being designed.
Energy saving EVO helical discharge
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Traditional radial discharge
3
Specifications in this document are subject to change without notice.
Product names in this publication are all trademarks of Valmet Corporation.
© Valmet Corporation, MFDU_B_2018_699-02 05/2016.
Unique helical discharge
New EVO46
to complete
the range
Evolution
Defibrator
When focus is on
operating cost
• Major energy
savings
Disc gap
control
• Revolutionary
design
Safe remote
control of your
Defibrator™
In order to meet market demands, Valmet has developed a
new model of EVO machine, the EVO 46. EVO 46 is
designed with Valmet latest technology. The capacity
range from 8 tph to 18 tph and segment availability
between 40” to 46 “
• Superior infeed
geometry
• Unique helical
discharge
Evolution Defibrator series
90
2
Major energy savings
Revolutionary design
Superior infeed geometry
Our EVO family Defibrators have all
reduced the specific energy consumption with minimum 10 % compare
to the other system and is one of
the reasons why customer choose
Valmet. The energy savings comes
from good distribution of chips in to
the grinding zone (wings at feeder),
better distribution of fibers between
the segments (due to even pressure
distribution inside the housing),
more efficient fiber flow out from the
housing (helical housing), lower friction in bearings (as a result of roller
bearings compared to hydrodynamic
bearings).
The key features of the EVO-series
Defibrator is the advanced helical
discharge from the refiner housing as
well as new refiner segment technology, a new roller bearing system with
zero axial play, an exterior design that
contributes to thermal stability and
perfect parallellity during operation.
The design is made for good access
to enable easier and quicker maintenance, i.e change of segments. The
EVO Defibrator system also includes
a new high-capacity and high dewatering screw feeder system with a
dewatering plug pipe.
The new Defibrator features a highspeed feeder that, combined with a
new infeed geometry in the coarse
breaker bar section of the segment
area and a high performance center
plate, provides for an unique low
energy and smooth, uniform furnish
flow into the fiber-grinding zone.
The flow pattern of furnish, steam
and fiber in the refiner is essential
in the fiber preparation process.
Smooth, uniform infeed and discharge not only influences fiber
quality but also the consumption of
electric energy for grinding, steam
consumption for discharge, resin
consumption and dryer energy consumption.
Production, t/h
Since launching, the EVO series has been expanded to include EVO models with segments
ranging in diameter from 46 to 74”. And since its launch at Ligna 2005, the EVO series has
been a great sales success. In fact, it’s now operational on all of the world’s continents.
EVO 46
EVO 50
EVO 56
EVO 64
EVO 70
EVO 74
Ø 40-46”
Ø 46-50”
Ø 52-56”
Ø 58-64”
Ø 66-70”
Ø 70-74”
90
80
80
70
70
60
60
50
50
40
40
30
30
20
20
10
10
0
1500 rpm
0
5