The filtration with the active electrostatic system consists of a two-phase system thanks to which it’s possible to obtain the precipitation of solid or liquid particles contained in the air flow through the action of an electric field.
In a first stage, the air that passes through the FE System electrostatic filter is subjected to the action of an electric field with positive ionization, generated by a powered wire with high electrical voltage placed between two plates connected to ground: that field causes the liberation of positive ions, generating a phenomenon known as "crown discharge". The electrical charges that migrate between the electrode and the grounded surfaces collide with the air particles present in the air flow, giving to them part of their positive electric charge.
In the second phase, the previously loaded gaseous flow crosses the electric field of catchment: this is constituted by positively charged plates and by plates connected to ground, alternately arranged.
Thanks to that shape of the FE System electrostatic filter and to the participation of the electrostatic force, the solid particles contained in the air are attracted to the catchment plates, since they are negatively charged, and rejected by the positively charged plates.
Periodically, depending on the concentration of the pollutants, it’s necessary to wash the filter with a particular detergent, studied to guarantee a better performance and a longer life cycle of the product.
The efficiency of an electrostatic filter is very high, comparable to an absolute filter, since it’s usually used for fine particles with less than 1 micron in size. Typical pollutants are cigarette smoke 0.5 to 0.3 microns, oil vapors 1 to 0.2 m, PM10, PM2.5, PM1, etc. The electrostatic filter efficiency is measured and tested by taking as a reference the particles with 0.4 um in diameter average.