Breather filters are used to allow for the passage of air under pressure from hoppers or silos, while averting powder leakage. The size of their filtering surface is based upon the pressure of the air volume and on the filtering speed. The kind of filtering element is defined based upon the product to filter (powder, granules, flakes…).
The filtering elements can be smooth or of round bag type, or plaited or made in the shape of a cartridge.
Filtering round bags guarantee lesser friction with the product to be filtered and therefore facilitate the flow along their surface, they are, as a result, appropriate for all those products that have clogging or hygroscopic features, or that, in any case, are sensitive to climatic change.
When the diameter is the same, the cartridge-like filtering elements allow to reach filtering surfaces that are larger compared with the filtering round bags, however they are recommended only for products that are not especially hygroscopic, fine or clogging, they are not recommended for abrasive products
Suction filters are used every time it is necessary to suck powder so that it is not dispersed into the working ambience. Through the aspirator or the ventilator a depression is created that guarantees the suction of the powder, which, otherwise, would be dispersed into the environment.
They are used for centralised suction modalities on working stations, or on process machines such as mixers, packaging systems, sack-breaker stations.
The size of the aspirator is based on the depression and on the necessary air capacity, once said variables have been defined, the filtering speed is determined and, as a result, the required filtering surface.
The kind of filtering element is defined based on the product to be filtered (powder, granules, flakes…).
The filtering elements can be smooth, of the roud bag type, plaited or cartridge-like.
Filtering roud bags guarantee lesser friction with the product to be filtered and, therefore, facilitate its running on their surface, they are therefore appropriate for all those products that have non-runny, hygroscopic features, or that, anyhow, are sensitive to climatic variations.
If the diameter is the same, the cartridge-like filtering elements allow to reach filtering surfaces that are larger than in the case of filtering roud bags, they are however recommended only for those products that are not especially hygroscopic, fine or non-runny, nor are they to be used with abrasive products either.