AR filter belongs to Electrostatic Line and it is composed by modular units for the electrostatic air filtration from pollution like oil fogs, dusts, welding fumes and industrial smokes in general. A very important feature of AR filters is their modularity: the smallest 3module has a filtration capacity of about 2.000 m3/h and, combining opportunely the modules, we can obtain multiple air capacities, up to 48.000 m3/h. AR Electrostatic Filters are constructed with a strong structure of bent sheet metal, suitable for the installation on the floor. The units are equipped with an inlet flange for the connection with the pipeline of the system. The filter is also equipped with an electric board for the control of the electrostatic part and, for the model with the fan, also with the start/stop controls for the suction unit.

The modularity of AR filters also allows to be joined together with different filtering elements such as pocket filters, drops separators, activated carbon filters. In a very compact version, the AR can be equipped with a fan unit, by adding a back module to the electrostatic. There are two types of AR electrostatic filter for each configuration; one for the dry smokes and the other for the oil fogs. In the second version, there are a system for the unloading of the condensate collected by the electrostatic cells and a tank for the collection of the filtered oil. AR filters can be equipped with an activated carbon module “AR CA” or a fan module “AR M”, or both “AR CA M”. Electrostatic filters ensure the purification of the air from polluting elements like fumes, dusts, oil mists, welding and processing fumes. Those pollutants can have granulometry with values that vary from 10 to 0,01 micron. The flow resistance of the electrostatic filter can vary from 40 Pascal (filter clean) to 80 Pascal (filter dirty). The inlet concentration of the pollutant can be up to 50 mg/m. the temperature of the fluid must not exceed 60°C and the relative humidity can vary from 20% to 99%.

Operating principle
The polluted particles contained within the gaseous flow, passing through the ionising section, are charged with unipolar electricity (thanks to the tungsten wires fed with 10 kV direct current suspended between electrodes connected to the ground). In the collecting section (composed by pure aluminium plates fed with 5kV current, alternated with plates connected to the ground) the particles are repelled by the plates fed to the plates connected to the ground. Those last plates have the function to catch the polluting particles present in the fluid. The polluting particles kept in the filter must be periodically removed with simple maintenance operations.

Automatic Monitoring
The Automatic Monitoring System (AMS) is an electronic control device which allows to manage the filtering unit. Available with remote access and in two different versions for the models AR:

  • AMS Local: each single machine has its own AMS alphanumeric;
  • AMS Centralized: there is a centralized touch screen with all the graphic monitoring functions for more than one machines.