The suction unit of the side channel blower type, manufactured in Germany by reputed manufacturer, with direct coupling between the fan and the motor shaft and no transmission system. It is thus completely maintenance free, fit for round-the-clock 24 hours duty, very silent and provides outstanding suction performances; a safety thermal switch cuts off the motor in case of overheating The control board is placed inside a casing, in a safe position at the back, and includes two independent ON and OFF switches (protection IP55), a safety emergency stop button and a soft start device, to reduce the amp drawing when starting the motor. A safety cartridge filter, placed between the motor and the main filter, protects the motor from contact with dust in case of dust accidentally passing through the main filter; a vacuum indicator enables constant checking of the suction performance, and detecting possible clogging of the filter. A pressure relief valve protects the motor from overheating in case of clogging of the filter or other blockings in the suction system; a diffuser filter reduces the speed and noise of the air on the exhaust outlet.
The filter is placed and protected inside the steel filter chamber; ; the polyester star filter provides a filter surface of 7 to 12m2, and high filtration efficiency (Antistatic class M, 1 micron). The Self clean automatic filter cleaning enables the user to clean the filter efficiently, so as to detach most of the dust and maintain the filter clean, in order to increase its life and maintain the suction performance of the machine. The tangential aluminium die-cast suction inlet, placed below the filter, makes it possible to vacuum at the same time dust, solid and liquid material, with no need to change or take out the filter. A cyclone welded inside the filter chamber conveys most of the dust directly in the container, and protects the filter from cutting or tearing.
The vacuumed material is placed inside a drop-down bin mounted on wheels (160 to 220 litres capacity), which makes it possible to dispose easily and safely of the sucked material, if need be collecting it directly into a plastic bag.
The vacuum is mounted on a sturdy steel chassis with two pivoting wheels, one of which with brakes; all metal parts of the vacuum are epoxy painted.