The ScreenX RS vibrating sieves or rectangular sieves are equipped with an “MFVexcite” multi-frequency vibration mode mesh-cleaning device. Especially eff ective for the separation of powders, granules and liquids considered non-screenable, obtaining maximum screening precision and the possibility of using mesh down to 20 microns. Mainly used in the chemical, ceramics, ecology and recycling, plastics, petrochemical, construction, and mining and quarry sectors for screening of sand.