New 'All-in-One' three-stage filter offers high operating safety and reduces installation space
August 12th 2011

The new compressed air three-stage filter DF-T(hree) combines three purification stages in one filter: As a coalescing filter it retains oil aerosols and particles, as an activated carbon adsorber it removes oil vapours and other hydrocarbons. The DF-T is validated according to ISO 12500-1 and achieves an overall residual oil content of < 0.003 mg/m3. It is therefore still under the required limit value according to ISO8573-1:2010 to achieve the quality class 1.

The three-stage filter is based on the flow-optimized filter housings of the Donaldson Ultrafilter® brand and expands the proven Ultra- Filter series. The compressed air filtration by Donaldson therefore with immediate effect has a new "All-in-One" filter for removing oil aerosols, oil vapours and solid particles, which offers essential economic advantages at a high operating safety.

The triple function of the new filter significantly reduces the number of required filters and therefore needs less installation space. The integration of the three filtration stages in machines and equipment can be implemented considerably easier and more cost-effectively. When replacing a previously common combination of three filters by a three-stage filter DF-T, up to 60 % of installation space can be saved when compared to the triple combination. Of course, the installation and maintenance costs for an individual filter are also reduced when compared to the filter combination.

The use of the new DF-T filters is as interesting for point of use filtration in sensitive applications, such as the food production, the pharmaceutical industry, in laser cutting machines, as well as environmental technology as in the central compressed air treatment for performances up to 110 m3/h. The filter can be used especially advantageously as a compact treatment unit for small compressors, in order to generate pure compressed air in a simple way, for example in paint applications. The three-stage filter thereby enables the optimum adjustment of the compressed air quality to the consumer profile as requested by the users.

The new DF-T "All-in-One" filter removes oil aerosols, oil vapours and solid particles Up to 60 % installation space can be saved by a DF-T three-stage filter compared to a filter combination

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