Donaldson Aerospace & Defense Expands in St. Louis for Future Growth

ST. LOUIS, Mo., June 19, 2011 –Donaldson Aerospace & Defense, a division of Donaldson Company (NYSE:DCI), announced today that its Saint Louis office and manufacturing plant has relocated to a larger facility, enabling the company to handle current business and future growth. The expansion allows the industry leader to more efficiently address customer requirements while expanding its product line.

“Our team has made remarkable things happen in our previous location, and this move allows us to be positioned for even more success now and in future,” said Michael Scimone, President of Donaldson St. Louis’ Office. “With new opportunities on our doorstep, additional engineering, operations and manufacturing space was paramount to address all of our military and commercial helicopter customer requirements. St. Louis continues to be an ideal location for our operation with its high density aerospace workforce and supplier base.”

The new 35,000-square-foot location is in an existing structure located in Chesterfield Valley - a western suburb of St. Louis, Missouri. Donaldson’s Saint Louis office provides military and commercial engine inlet filtration solutions and related products for helicopters in service worldwide. All Internet, email and phone contacts remain unchanged. The new address is 17891 Chesterfield Airport Road, Chesterfield, MO 63005.

To learn more about the Donaldson Aerospace & Defense, visit www.DonaldsonAerospace-Defense.com or contact the company at +877-314-9640.

About Donaldson Aerospace & Defense

Donaldson Aerospace & Defense is a leading worldwide provider of filtration systems for the aerospace and defense industry. 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.