Wind sifter (Pre-cleaning)
Removal of dust and light contaminants to stabilize production.
Dust and light contamination spread through conveying, roasting, and packaging unless removed at the source. The Wind Sifter separates light material from green coffee using controlled airflow before storage or screening. By extracting dust and low-density debris early in the process, it reduces airborne contamination, stabilizes downstream equipment, and lowers overall maintenance load across the roastery.
How it works
Coffee falls through a vertical airflow chamber. Beans, being the heaviest fraction, drop directly into the clean product stream while lighter material follows the airflow. Adjustable air guide rails regulate separation intensity.
Within the integrated expansion chamber, contaminants are separated again. Light material is directed to a cyclone and fan for filtration, while heavier particles drop into an airlock and reject bin. Magnets at discharge remove ferrous contamination.
When it makes sense
Wind sifting is relevant when dust load is high, when coffee is received in jute bags, or when roaster maintenance is strongly affected by fines accumulation. It becomes particularly valuable in roasteries above three tonnes per day or where optical sorting requires stable, dust-free feeding.
It does not replace sieving. Sieves remove oversized and undersized material; wind sifters remove light contaminants.
Key benefits
Cleaner production environment
Captures dust directly from the product stream, removing fines, jute fibres, burlap strings, light chaff, parchment flakes, paper fragments and other low-density debris before they circulate through the roastery.
Reduced equipment wear
Lower dust circulation decreases buildup inside roasters, conveyors, filters, and packaging equipment, reducing cleaning frequency and limiting abrasive wear on moving components.
Improved optical stability
Removing fines and light contaminants upstream stabilizes color sorting accuracy, reduces false rejects and lowers cleaning requirements inside optical inspection chambers.
Controlled air separation
Adjustable airflow and integrated secondary separation allow the system to adapt to varying dust loads without affecting bean integrity.
Technical specifications
Download our wind sifter brochure- Air volume: approximately 95 m³/h
- Power supply: 230/400V 50Hz
- Feeding motor: 0.25 kW
- Discharge motor: 0.25 kW
- Dimensions: approximately 1850 × 770 × 2000 mm
- Supplied with magnets, shatterproof glass, 5 adjustable air guide rails, prewired motors and lighting, food-compliant configuration and documentation
- Cyclone and fan required for operation (not included)
- ATEX Zone 22 electrical configuration (optional available)
Maintenance & service
Maintenance is limited to airflow adjustment, inspection of air guide rails, magnet cleaning and verification of cyclone and fan performance. The integrated secondary separation reduces dust load on downstream filtration components and keeps maintenance predictable.
Questions? We're here to assist.
Yes. Local extraction removes airborne dust. A Wind Sifter removes dust directly from the coffee stream before it spreads.
No. A wind sifter separates by density, not by size.
Yes. Removing dust upstream improves inspection stability and reduces internal cleaning.
Need help choosing the right cleaning solutions?
Every roastery and growth plan is different. Talk with us and design your optimal cleaning architecture.