Powertech pollution controls provides dust bag filters and dust collectors. These dust bag filters are fitted with non-woven polyester fabric capable of capturing dust particles as small as 10 microns. Some of the salient features include removes hazardous dust; fitted with manual de-dusting arrangement for in-situ dusting of filter bags; high filter efficiency of 98 per cent; can be fitted with anti-static; or fire retardant filter fabric, if required; and separate dust collection bin for easy disposal of dust. The dust bag filters and dust collectors can have application to capture dry or mildly wet particles from tool and cutter grinders, cast iron machining, graphite/ carbon machining, surface grinders, drilling, milling, deburring, polishing, mixing, etc.