The filter unit consists of tubular filters (socks) with a top mounted shaker cleaning motor. This maintains optimum filter performance by means of an automatically controlled cleaning system. The filtering is by means of a series of polyester antistatic filter socks, fixed down to a cell plate.
The dusty air is fed to the inside of the filters, via a plenum, due to this, most dust spirals down into the container / hopper section. Finer particles are separated by the filter, and clean air is passed through to atmosphere.
When the fan is switched off, the auto cleaning cycle commences. This refreshes the filters ready for the next use. The cleaning cycle duration is adjustable by a timer located in the control panel. This should be set at time of commissioning, according to the type, size, and load of dust being collected. Under heavy loads of fine dust the filter may reduce the airflow. In this case the unit should be switched off to initiate the cleaning cycle.
Recommended cleaning time is 3 to 10 minutes. However, the final time program can be adjusted according to the type of dust being filtered and the volume of dust that is extracted.
Ratio of filter surface area to the airflow and the high permeability of the polyester fitter media provides low pressure losses which in turn results in economical running compared to traditional fabric such as cotton.
The IMF filters have been designed with a view to keep the overall size small in relation to the filter surface area, while not compromising the free flow of air within the filter. This again keeps pressure losses to a minimum.