The CORAL substation MECMODUL mod. is the modular sleeve type with automatic continuous discharge, for filtering shavings, dusts and sawdust. The structure is in strong galvanised sheet panels, bolted to each other and divided as follows: A) upper body containing cleaning devices, sleeve-holder frame, filtering sleeves with diameter of 220 mm and tube plate; B) lower body, with collection hopper and evacuation and unload systems (auger and star valve), mounted on legs.