Rough pre-cleaners

Rough Pre-Cleaners for Efficient Grain Processing

Rough pre-cleaners are designed to remove large impurities and oversized particles from grains before further processing. They ensure higher efficiency in downstream cleaning and sorting, protecting equipment and improving product quality. Durable and easy to maintain, they are ideal for any grain handling operation.

Capacity: Up to 200 t/h
Drum cleaner separates coarse impurities from the main seed.

Capacity: Up to 250 t/h
Straw Separator for crops harvested with a lot of straw

Capacity: Up to 15 t/h
Grain de-awner is used for pre-treatment of various grain types.

Removes dust, impurities from seeds with controlled airflow.

Capacity: Up to 4 t/h
Mainly used for grass seeds before pre-cleaning, or with high-capacity machines handling barley.

Capacity: Up to 25 t/h
Grain de-awner with low power-consumption ideal for grains.

benifits of Rough Pre-Cleaners

Rough pre-cleaners improve seed processing by removing large and coarse impurities such as sticks, stones, husks, and plant residues early in the process. This protects downstream machines, increases efficiency, reduces clogging and wear, and ensures smoother and more effective further cleaning operations.

flow of a Rough Pre-Cleaners

Various rough pre-cleaners are available on the market, and Westrup offers machines designed for different processing requirements. Regardless of the application, the goal is the same: efficiently remove large and coarse impurities from the product stream before further cleaning and processing.

The process flow of a de-awner with beaters is shown below.

CW De-Awner

faq on Rough Pre-Cleaning

  • De-awners are used for pre-treatment of various grain types; the purpose of the de-awning operation is to remove awns on barley kernels, loose husks from wheat and to clip oat kernels.

    The de-awner can be used where heavy de-awning is required but also for products where only a light de-awning is needed. The degree of de-awning depends on the amount of time the product takes to pass through the housing of the machine which can be adjusted when the machine is in process.

  • The straw separator is an efficient pre/ rough-cleaner suitable for intake plants with high moisture-content crops containing a particularly high amount of straw/ pods and coarse impurities.

    The large diameter rotating straw drums and manually adjustable product flow plates gives an optimal removal of straw and other large particles in combination with a strong airflow to catch light impurities. Two mesh sizes are available to meet the requirements of any crop.

    The straw separator is suitable for intake sections and silos to relieve the following machines and conveyors.

  • The drum cleaner (DC) is used to remove large impurities from grain in the milling and similar industry to prevent damage of equipment later in the flow.

    The drum pre-cleaner (DP) is used to remove very large impurities, such as paper, pieces of wood, bushes or corn cobs from the main product.

  • Brushing machines are useful in vegetable and grass seed installations, especially for splitting twin kernels and polishing seeds and leaves. The machines are easy to clean and therefore very suitable for basic seed plants and installations to produce flower and garden seeds.

    The rotating shaft can be installed with different types of brushes or steel beaters to ensure a highly efficient treatment of a wide range of products, with easy adjustment of the distance of brushes to the mantle.

contact westrup

We operate globally in more than 30 countries, with local offices in Denmark, Germany, France, the USA, Kazakhstan, and Australia.

Contact your local representative at one of our offices, or get in contact with an authorized distributor near you.

REcommended reads



We guide you to the right equipment based on your main crop.

Explore our large machine portfolio with machinery for companies of all sizes.


Read stories from our customers on their experience with working with Westrup.