- Mobile Dust Collection (Filtration) Fans - Radial Bladed Impeller From Sheet Metal - Electric Motor Of Form B5 Flange - Rigid Construction In Sheet Metal. - Mobile filtration system has radial bladed impeller with an open front. �°t has one top filter bag, one bottom collection bag. Mobile machine on four castors. - This system is suitable for suction of sawdust, granular materials, woodchips, metalchips, etc. Sucked saw dust collected in the filter bags and it will be removed manually.