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Donaldson Company's Emission Reduction System Earns EPA Approval for Heavy-Duty Diesel Engine Retrofits

28 May, 2003
Donaldson is the only company in the United States to receive EPA approval

MINNEAPOLIS--(BUSINESS WIRE)--May 28, 2003-- Donaldson Company Inc. (NYSE:DCI), today announced that the United States Environmental Protection Agency's Office of Transportation and Air Quality has approved Donaldson's Diesel Oxidation Catalyst ("DOC") muffler and Spiracle crankcase ventilation filter. The DOC muffler and crankcase filter combination dramatically reduces diesel engine emissions by 25 to 50 percent from the tailpipes and engine crankcase vents of medium and heavy-duty trucks and school buses.

Donaldson is the only company in the nation to be approved by the EPA's rigorous Environmental Technology Verification Program. It will enable Donaldson to offer its DOC muffler and crankcase filter solution for retrofitting a broad range of engine/vehicle combinations manufactured since 1991.

"We are extremely pleased to receive EPA approval for our diesel emission reduction system," said Steve Schmeichel, emissions general manager, Donaldson Company. "We continue to see growing interest in a combined system that provides substantially more reductions than a DOC muffler alone. Since up to 25 percent of emissions come from the open crankcase on diesel engines, tailpipe-only solutions ignore a big contributor to the problem. Donaldson is the only approved company offering the combined crankcase/tailpipe approach."

Donaldson's DOC muffler and Spiracle products are available through many engine and heavy-duty truck dealers and distributors. For additional information, contact Donaldson Company at 1-800-887-3835, or visit Donaldson's Web site at www.donaldson.com.

About Donaldson Company

Donaldson Company, Inc., headquartered in Minneapolis, is a leading worldwide provider of filtration systems and replacement parts. Founded in 1915, Donaldson is a technology-driven company committed to satisfying customer needs for filtration solutions through innovative research and development. Donaldson serves customers in the industrial and engine markets including dust collection, power generation, specialty filtration, compressed air purification, off-road equipment, industrial compressors, and trucks. More than 8,500 employees contribute to the company's success at 40 manufacturing locations around the world. In fiscal year 2002, Donaldson reported sales of more than $1.1 billion and achieved its 13th consecutive year of double-digit earnings growth. Donaldson is a member of the S&P MidCap 400 Index and Donaldson shares are traded on the New York Stock Exchange under the symbol DCI. Additional company information is available at www.donaldson.com.

CONTACT:
Padilla Speer Beardsley Inc., Minneapolis Patty Hoffman, 612/455-1781
E-mail: phoffman@psbpr.com
or
Donaldson Company, Inc., Minneapolis Rich Sheffer, 800/374-1374
E-mail: rsheffer@mail.donaldson.com

SOURCE: Donaldson Company, Inc.

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