New sterile filter elements for demanding applications
Higher efficiency and process reliability
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Just after the introduction of the new Ultra-Filter generation, with which compressed air users can achieve substantial gains in efficiency and reduce their costs for compressed air, Donaldson has now presented a new series of sterile filter elements for process air treatment based on the same fundamental developments.
The heart of the filter element is the new deep filter medium with a hydrophobic plasma coating. The water-repellent coating gives the elements higher resistance in CIP processes and also reduces the differential pressure during drying after steam sterilisation. For the user, this means higher reliability and a long service life of the elements under the most diverse operating conditions.
The pleating of the filter medium also has the effect of increasing efficiency. This significantly increases the effective filter area with the result that a very high particle absorbance capacity is achieved and the differential pressure remains constant over long periods in use.
Extensive comparisons in the test laboratories at Donaldson and practical tests have shown that these design measures lead to a long-term reduction of the differential pressure. Conventional sterile filter elements have a substantially higher differential pressure both in compressed air filtration and in pressure filtration under atmospheric conditions, i.e. in simulated tank aeration.
Designated P-SRF N, the new elements achieve a high separation rate of 99.99998% with regard to oil droplets with 0.2 µm diameter (DOP test). The new filter was successfully tested by an independent institute (TNO / The Netherlands) for the filtration of bacteria (Brevundimonas diminuta) and viruses/phages (MS-2 coliphages). The filter elements can be used in a temperature range of 20 to +200 oC and are suitable for steam sterilisation as well as sterilisation with H2O2 (VPHP sterilisation).
The filter medium of the P-SRF N elements is chemically inert and is modified specifically for the filtration of bacteria, phages and viruses. The validated filtration rate ensured the highest degree of reliability for all aseptic process applications of compressed and process air, for example in food production, in packaging processes and in the aeration of tanks and fermenters in breweries, dairies and systems for biotechnology. Ten different sizes are available for flow rates from 60 to 3000 m3/h, and Donaldson naturally offers the matching filter housings for sterile compressed air filtration and tank aeration.
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Donaldson Filtration Deutschland GmbH
Industrial Filtration Solutions
Büssingstr. 1, 42781 Haan, Deutschland, Tel.: 02129-569-0
Fax. 02129-569-100 E-Mail: IFS-de@donaldson.com, www.donaldson.com
About Donaldson Company
Donaldson is a leading worldwide provider of air and liquid filtration systems and replacement parts that improve people's lives, enhance our Customers' equipment performance and protect our environment. We are a technology-driven company committed to satisfying our Customers' needs for diesel engine equipment and industrial filtration solutions through innovative research and development, superior technology, and global presence. Our 12,000 employees contribute to the company's success by supporting our Customers at more than 100 sales, manufacturing, and distribution locations around the world.
Donaldson is a member of the S&P MidCap 400 and Russell 1000 indices, and our shares trade on the NYSE under the symbol DCI. Additional information is available at www.donaldson.com.
