Donaldson® Company Acquires AirCel® Corporation to Strengthen Production Capability and Product Offering to Compressed Air & Gas Industry


MINNEAPOLIS, MN - January 20, 2006 -- Donaldson® Company, Inc. leading maker of industrial filtration systems, announced today that is has acquired AirCel® Corporation, a privately held manufacturer of dryers and purification equipment for compressed air and other gases.

"The acquisition of AirCel will dramatically strengthen our production capability and product offering to the compressed air and gas industry in North America," Jim Giertz, Senior Vice President of Donaldson's Industrial Filtration Solutions business, said. "By manufacturing in North America, we can cut lead times and realize several economic advantages. Our Donaldson® Ultrafilter® brand is a strong line of compressed air filtration products, and AirCel's dryer products extends our range of both refrigeration and regenerative dessicant dryers for our North American customers."

"AirCel's patented VariCel® refrigerant dryers perfectly complement the Donaldson Ultrafilter compressed air filters and coalescers," Mike Zarif, a co-founder and Vice-President, Engineering of AirCel, explained.

AirCel also manufactures N2Cel® nitrogen generators for use in tire inflation. "Using compressed nitrogen for tire inflation offers both safety and mileage advantages over normal compressed air," Robert Olson, co-founder and President of AirCel, stated. "We are pleased to work with a company that has the global reach and resources of Donaldson as we further develop our product offering."

AirCel is based in Maryville, TN with a modern facility that produces a full line of compressed air& gas purification equipment. AirCel's refrigerant dryers all use R134a, the latest environmentally friendly refrigerant that is required to be used in all industrial products by 2010. Both AirCel and Donaldson are members of the Compressed Air and Gas Institute (CAGI).
For an updated catalog of Donaldson products under the brand names Donaldson Ultrafilter (http://www.donaldson.com/en/compressor/index.html) and Donaldson AirCel (http://www.aircel.biz/), call 1-800-543-3634.

Further product information can be found at www.aircelintl.com and .n2cel.com.
Donaldson is a leading worldwide provider of filtration systems and replacement parts. Donaldson is a technology-driven company committed to satisfying customer needs for filtration solutions through innovative research and development. Donaldson serves customers in the diesel engine and industrial markets including in-plant air cleaning, compressed air and gas purification, power generation, disk drive filtration, off-road equipment and trucks. Our 11,000 employees contribute to the company's success at over 30 manufacturing locations around the world. Donaldson is a member of the S&P MidCap 400 Index and Donaldson shares are traded on the NYSE under the symbol DCI. Additional company information is available at www.donaldson.com.

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