Richiger EA 910, Operator'S Manual, Page: 33 / 76

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The grain flow concept
The aptitude of different kinds of grain to flow
can be approximately determined by the
angle formed by the sides of a mound lying on
the ground. A steep angle indicates bad grain
flow (Fig. 39) whilst a shallow angle indicates
a good flow rate (Fig. 40).
Some of the factors that contribute to good grain flow are the following:
Remember: the whole working principle of the unloader rests upon the flow characteristics of grain.
Corn above 22% moisture
Soybeans above 22% moisture
Wheat above 20% moisture
Sunflower
Oats
Barley
Paddy rice
Chickpeas
Grains that flow with more difficulty should be extracted at a slower pace as the higher speeds cannot be
attained and if attempted the unloader could suffer mechanical damage. Examples of these grains are:
Corn below 21% moisture
Soybeans below 21% moisture
Wheat below 19% moisture
Examples of grains with good flow characteristics that can be unloaded at higher speeds are:
Low
heap
angle
Bigger grain size
Smooth outer surface
Round shaped grain
Dry grain
Clean grain
Smooth flow,
higher rate of
extraction
Fig.39 Fig.40
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