12
INNER SCREENS
Screen perforation at each
section (mm)
KDC 8000 1 - 2 - 3 - 4 - 5
KDC 4000 1 - 2 - 3
Maize
(corn)
Wheat Barley
Oat
Rye
Soya
beans
Sun-
flower
Peas
Rape
seed
Ø17/Ø17/Ø15/Ø15/Ø15
Ø17/Ø17/Ø5
Ø15/Ø15/Ø13/Ø13/Ø13
Ø15/Ø15/Ø11
Ø13/Ø13/Ø11/Ø11/Ø11
Ø13/Ø13/Ø11
Ø11/Ø11/Ø9/Ø9/Ø9
Ø11/Ø11/Ø9
Ø9/Ø9/Ø7,4/Ø7,4/Ø7,4
Ø9/Ø9/Ø7,4
Ø8/Ø8/Ø7,4/Ø7,4/Ø7,4
Ø8/Ø7,4/Ø7,4
Ø7,4/Ø7,4/#5,2/#5,2/#5,2
Ø7,4/Ø7,4/#5,2
Ø7/Ø7/#5,2/#5,2/#5,2
Ø7/#5,2/#5,2
Ø6,5/Ø6,5/#5,2/#5,2/#5,2
Ø6,5/#5,2/#5,2
#5,2/#5,2/Ø4,3/Ø4,3/Ø4,3
#5,2/#5,2/Ø4,3/Ø4,3
Ø4,3/Ø4,3/Ø3,5/Ø3,5/Ø3,5
Ø4,3/Ø4,3/Ø3,5
Ø3,5/Ø3,5/#2,75/#2,75/#2,75
Ø3,5/Ø3,5/#2,75
Oblong holes 5 x 20 (all sections)
Oblong holes 10 x 30 (all sections)
Screen program:
To obtain optimal efficiency, it is important to use
screens of correct slot/hole dimensions.
A range of screen sizes suitable for ordinary crops is
available.
If more crop is filled into the cleaner, than the inner
screen can handle, the kernels that do not fall through,
will come out together with the large impurities.
Screens for inner drum
On the inner drum, the crop is to pass through the
screen and the large impurities be arrested.
Screens with a small hole diameter will therefore en-
sure optimum separation of large impurities; at the
same time, however, the capacity will be reduced. A
large hole diameter, on the other hand, will result in a
high capacity and reduced separation of large impuri-
ties.
On KDC4000 it is recommended, as standard, to use
the same hole diameter on the first two inner sections.
However, in the event of low capacities, a better sepa
-
ration will often be obtained by using a smaller hole
diameter on the 2nd section. Still, the main part of the
crop is to pass through 1st and 2nd sections of the in-
ner screen.
It is important to avoid kernel waste, that most of the
kernels have fallen through the inner screens before
section 3.
On KDC8000 it is recommended, as standard, to use
the same hole diameter on the first two inner sections.
On sections 3 - 5 are usually used screens with slight-
ly smaller holes.
However, most of the crop must pass through the
innner screen of the 1st to 4th sections.
It is important to avoid kernel waste, that most of the
kernels have fallen through the innner screen before
section 5.
In case of lower capacity operation, screens can be
chosen on the inner drum with smaller holes, so that
impurities with smaller oversize relative to the kernels
are also sorted.
Max. capacity
Reduced capacity
1 2 3 4 5
1
2
3
KDC 8000
KDC 4000
