The DV231 industrial vacuum cleaner combines the advantages of robustness , power and filtration efficiency of a real industrial vacuum cleaner, with the handling, comfort and user-friendliness of a typical commercial vacuum cleaner. The DV231 has a powerful single phase motor, a very solid steel chassis and a completely modular multi-stage filtration system. Thanks to a modular design, this vacuum cleaner can be equipped with a high efficiency filter bag, a primary cartridge filter with a large filtering surface.