Oscillating sieve with aspiration system
Size-based separation to protect equipment and stabilize roasting
Sieving equipment sorts out small and large materials while integrated aspiration removes dust and light particles. This protects downstream machines and ensures that only correctly sized beans continue through the process.
How it works
Coffee enters the oscillating sieve and passes across two screening decks. The Ø11 mm perforated top deck retains oversized material. The Ø2 mm wire mesh bottom deck removes fine fragments. The middle fraction - whole beans - continues downstream.
Integrated aspiration extracts light dust during separation, with airflow directed to a cyclone and filtration system for controlled dust handling. A magnet at discharge removes ferrous contamination before clean coffee exits the machine.
When it makes sense
The Sieve with aspiration system is relevant when intake quality varies and consistent pre-roast cleaning is required before storage or production. It provides stable mechanical separation of oversized and undersized material, reducing variability in the product stream before roasting.
It is typically installed upstream of destoners or optical sorters to stabilize flow and protect downstream equipment. In moderate dust environments, integrated aspiration may replace a separate Wind Sifter. In higher dust conditions, both systems can operate in sequence.
Key benefits
Defined size separation
Removes contaminants larger than 11 mm and smaller than 2 mm, stabilizing the product flow before storage or roasting.
Removal of oversized and fine material
Retains sticks, large stones, burlap strings and other oversized foreign objects on the upper deck, while extracting dust, small fragments and broken bean chips through the lower mesh.
Equipment protection
Prevents large debris and fine particles from entering roasters and conveying systems, reducing the risk of blockage and mechanical wear.
Integrated dust control
Built-in aspiration extracts light material during separation, limiting dust circulation and reducing load on downstream equipment.
Technical specification
Download our sieve cleaning brochure- Capacity up to 4 t/h
- Maximum air extraction approximately 35 m³/min
- Power 0.75 kW
- Sieve dimensions: 500 mm width, 1200 mm length
- Total dimensions: approximately 2255 × 1000 × 1650 mm
- Configuration includes Ø11 mm deck, Ø2 mm deck, ball cleaning bottom, sight glass with light, magnet with cleaning valve and IE3 motor with brake limiter.
- Optional alternative sieve decks, ATEX Zone 22 configuration, stainless steel 1.4301 construction and spare parts packages available.
Maintenance & service
The oscillating sieve incorporates a ball-cleaning bottom that reduces mesh clogging and lowers manual intervention. Routine service focuses on screen inspection, vibration settings, magnet cleaning and airflow verification. Designed for intensive industrial use, it provides predictable maintenance intervals.
Questions? We're here to assist.
Yes. Alternative sieve decks can be installed to match impurity profiles and specific cleaning objectives.
No. The sieve removes size-based impurities. Density-based stone removal requires a destoner installed downstream.
In moderate dust environments, the integrated aspiration is often sufficient. In very dusty conditions, a dedicated wind sifter installed upstream can further improve air cleanliness and reduce dust load.
Need help choosing the right cleaning solutions?
Every roastery and growth plan is different. Talk with us and design your optimal cleaning architecture.