The Cimbria destoners are used for separating dry granular material according to specific weight into two fractions. The goal is the elimination of heavy impurities, such as stones, metallic particles and other objects from, for example, coffee, grain or pulses.

Grains or particles of almost identical size are fed continuously onto the separating deck to ensure a uniform bed of material over the whole width of the deck surface. For better feeding results, two decks with a separate pre-bin are used.

The deck is fluidised by a completely uniform pressurised air system that lifts the light material, while the heavy material sinks towards the bottom and comes into contact with the deck surface.