The product is continuously fed into the centre of the top screen, from where it spreads out evenly to the outside across the entire screening surface.  The finer products fall through the screen near the center and the coarser products successively move to the periphery. The material moves in a   spiral pattern with increasing acceleration of the particles the further they are from the centre, with the result that even those particles which are   almost the same size as the screen mesh are screened. All the separated fractions are discharged through the lateral outlets. The screening process   is repeated again and again on each layer.

ADVANTAGES

* Three-dimensional movement increases material/screen mesh contact time thus screening efficiency is highly improved

* Up to five layers, and largest model to diameter 2900mm, large capacity could be reached

* Low acceleration, long service life of all parts, low noise

* No mesh-blinding problem with screen-cleaning devices

* Ability to effectively screen irregularly shaped particles

* Easy operation, screen replacement would be much more easier with pneumatic lifting device, for maximum time saving when changing screens