The FRN class nominal filter cartridges are made of polypropylene. Thanks to unique technology of production the cartridges ensure filtration efficiency level of 95 % for particle sizes encoded in the identification markings. FRN cartridges consist of a single layer of fibres wound on a polypropylene core.

The FRN class nominal filter cartridges are made of polypropylene. Thanks to unique technology of production the cartridges ensure filtration efficiency level of 95 % for particle sizes encoded in the identification markings. FRN cartridges consist of a single layer of fibres wound on a polypropylene core. The porosity of the layer varies in such a way as to minimise pressure drop and maximise cartridge absorption.

Perfect for applications where effective protection against such contaminants is required. They protect household appliances, installations, heating systems and fittings, prolonging their service life. The filter is made entirely of pure high-quality polypropylene, FDA-approved. It retains all the advantages of the original material including: high chemical, mechanical and thermal resistance. The internal filter structure is obtained without the addition of any plasticizing agents, adhesives or other binder components. Due to “melt-blown” production technology, these cartridges offer excellent efficacy, and in addition small flow resistance, very high absorption capacity and stiffness of the whole structure. They operate correctly even at high differential pressures. The FRN cartridges use their entire volume for filtration and therefore they have a very long service life, while offering high performance and constant efficiency. Additionally, they have an inner core, which significantly increases their resistance to pressure spikes. In the case of mechanical damage to the cartridge, the core also prevents the release of fibres to the filtered liquid. Due to filtration effectiveness, FRN cartridges belong to the group of the so-called nominal filters. This means that the filtration efficiency for example for a particle size of 1 micron is over 95%, that is only 1 in 20 particles of a given size can pass through the filter. FRN cartridges are used mainly for semi-industrial or home applications for water treatment. They are used with Standard and Hydro series filter housings, type FP2 and FP3.