Donaldson Appoints Avio-Diepen Exclusive Distributor of Aerospace Filtration Products in EMEA Market

MINNEAPOLIS, MN – December 6, 2010 – Donaldson Company, Inc. (NYSE:DCI), a worldwide manufacturer of filtration solutions and products, announced today that the company has appointed Avio-Diepen, a global leader in the aerospace industry, specializing in materials management and parts distribution, as an exclusive distributor of Donaldson aerospace filtration products in the Europe, Middle East, Africa (EMEA) market, as well as a portion of Asia.

Signed in August 2010, the distribution agreement includes Donaldson Aerospace & Defense filter products supporting the aviation industry.

"Avio-Diepen – a long-time distributor of our filtration products – has a great reputation as a global distributor and we are pleased to expand our relationship with them," said Pierre Habran, Director of Aerospace & Defence EMEA. "This new exclusive distribution agreement will offer increased availability of our Aerospace filtration products to Customers in the EMEA market and parts of Asia – further enhancing their overall experience with Donaldson. These same Customers will also benefit from the extensive sales network, market expertise, e-commerce tools and value-added services Avio-Diepen offers."

Headquartered in The Netherlands, Avio-Diepen has offices and distribution centers near Amsterdam, Atlanta, London, Dubai, Hong Kong, Beijing and Shanghai. Customers can contact Avio-Diepen at + 31- (0) 172-449759 or online at www.avio-diepen.com.

To learn more about Donaldson, visit www.donaldson.aero or contact us at 1-866-323-0394.

About Donaldson Aerospace & Defense

Donaldson Aerospace & Defense is a leading worldwide provider of filtration systems for the aerospace and defense industries. Our filtration solutions protect fixed wing aircraft, rotorcraft, military ground vehicles, electronic equipment, space vehicles, missiles, military shipboard systems, and amphibious vehicles. We are committed to advancing filtration technology, providing quality products and prompt Customer service. Our group serves Customers from sales, engineering, and manufacturing locations around the world.

About Donaldson Company

Donaldson is a leading worldwide provider of filtration systems 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 filtration solutions through innovative research and development, application expertise, and global presence. Our employees contribute to the company's success by supporting our Customers at our 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.