Material is metered into the cylindrical sifting chamber by means of a feed screw which discharges into a rotating helical paddle. Centrifugal force accelerates the movement of the particles against the screen. The rotating paddles, which do not contact the screen, break up soft agglomerates and propel individual particles through the screen while rejecting hard lumps and trash. The screen is attached to its supporting basket in such a manner that it can vibrate freely. This method of suspension also gives the screen resilience which enables it to safely absorb considerable impact from tramp material Application For all processes that must prevent agglomerate and / or foreign particles from contaminating the product. The units are suitable for the Food, Pharmaceutical, Chemical and synthetic material industries. Execution The units are available in mild steel, in V2A and V4A (304 and 316 stainless steel) and in various confi gurations allows adaption of individual requirements. The sieve meshes can be supplied in SS or nylon, with different aperture sizes, to suit customer needs and product specifi cations.