Short Description: 2 barrels, integrated with separator for pre-filtering, “TORAY” polyester PTFE coated HEPA filter. Applies to continuous working condition, small size and large amount dust. Specially applies to the floor grinding and polishing industry. Main features: Three Ametek motors, for controlling the on/off independently. Continuous drop-down folding bags system, easy and fast loading/unloading. 2 barrels, pre-filter is cyclone separator, filtering more than 98% dust, make fewer dust to enter in vacuum cleaner, prolong the vacuums working time, to protect the filters in vacuum and extend the life time. PTFE coated HEPA filter, low pressure loss, high filter efficiency