Np hydropneumatic systems designs and manufactures industrial dust collectors. An industrial dust collector, is a marvelous machine, marked by high performance, multistage-operation, blower -exhausters, varying from 3 to 7.5 hp. These industrial dust collectors, are housed in robust and compact, powder coated, mild steel enclosure, and are provided with a dust-collecting chamber, with fine mesh, separator filter of either woven or non woven fabric for high filtration, efficiency. The dust collecting chambers are provided with easy opening doors, for facilitating dust and trash-removal. The complete unit of an industrial dust collector, is mounted on two fixed wheels and 2 swivel castors.