3997 The most powerful, the biggest! - Available also ATEX certified Designed for the heavy industry Model 3997 is the most powerful mobile industrial vacuum in Nilfisk range, it has been designed for heavy-duty use thanks also to its reliable threephase suction unit. The great filter efficiency, granted by the wide filter area and the effective devices built to mantain the filter cleaned, such as the electric filter-shaker in the 3997 and the electric-pneumatic filter cartridge in the 3997WC, makes these industrial vacuums efficient and autonomous. In particular, the filter can be monitored in real time thanks to a specific tool, the vacuum-gauge, capable to show the remaining filter capacity; moreover a differential vuotometer switches off the machine when the filter is totally dirty. The control panel contains the on-off device, the hour-counter and the vuotometer. The vacuum is also equipped with lifting brakets, forklift brakets and accessories basket. HEPA filter, category “C” filter, Class “M”filter, Class “H” filter, PTFE filter, epitropic filter, painted or stainless steel structure versions are available. The container extraction through a particular release device system, makes the disposal of the collected material a very fast and easy operation while the large front wheels and the rear pivoting ones with brakes, make the moving of the vacuum a light operation.
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