Seed sizers

High-Precision sizers for Seeds and Grains

Westrup graders deliver accurate size sorting for seeds and grains, ensuring uniform quality and optimal processing efficiency for any operation.

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A green industrial dust collector with white doors and black viewing windows, branded 'Westrup'.

Large white industrial machine with a sloped conveyor belt and control panel, used for processing or sorting materials.

Capacity: Up to 6.4 t/h
Designed to separate round seeds from flat seeds.

Capacity: Up to 18 t/h
Compact machine for accurate 4-fraction product sizing.

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benifits of seed sizers

Seed sizers improve seed processing by separating seeds according to size for better uniformity and quality. This helps achieve accurate planting, improved germination, better crop growth, and higher market value while removing undersized or damaged seeds.

flow of a seed sizers

The spiral separator separates round and flat seeds by exploiting differences in their rolling behaviour under gravity. The inclination of the spiral determines how quickly the seeds move down the separator. A lower inclination reduces the seeds' velocity, whereas a steeper inclination increases their velocity. The optimal inclination depends on the physical properties of the seeds, including their size, shape, and density, and is adjusted to achieve efficient separation.

faq on of seed sizers

A size separator is designed to separate round seeds from flat seeds by means of gravity.
The machine can be built with one, two, four, six, or eight spirals per cabinet, depending on the capacity. One spiral gives 2 fractions, one round and one flat.
The spiral separator is a vertical spiral where the flat seeds will stay inside the spiral and the round seeds will be pushed over the edge of the spiral by means of gravity.
A size separator can be used on all round seeds that are broken, such as soya bean, rape seeds, coriander etc.