DONALDSON AEROSPACE & DEFENSE UNVEILS NEW UNIVERSAL FILTER MODULE FOR S-61 AT HELI-EXPO 2012

ST. LOUIS, Mo., February 11, 2012 – Donaldson Aerospace & Defense, a division of Donaldson Company, Inc. (NYSE: DCI), will display an innovative self-contained universal filtration system at Heli-Expo 2012, Exhibit 8451. The Universal Filter Module (UFM) has been launched with its first application on the Sikorsky S-61; this is the first ever available IBF for the aircraft.

The UFM features a low-drag filtration solution mounted forward of the engine inlets, featuring three filter elements easily accessible and removable for service.  These filters include a 4,500-hour service life.  A translating forward-facing dome for emergency bypass provides protection from airborne solid particulate.

The scalable system, developed in conjunction with the Coulson Group, has the potential to be adapted for a wide range of heavy, twin-engine helicopters, according to Michael Scimone, President of Donaldson’s St. Louis office. A successful flight test program has been completed and the development team is evaluating next steps, including certification for commercial applications.

“Our UFM was developed in response to an industry need and customer requests - tremendous potential exists within this market segment,” Scimone said. “As the industry’s filtration leader, this development effort underscores Donaldson’s long-standing commitment to technology advancement.”

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.  To learn more, please go to www.DonaldsonAerospace-Defense.com.

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 12,900 employees contribute to the Company’s success by supporting our Customers at our more than 100 sales, manufacturing, and distribution locations around the world.