Donaldson Comapny, Inc.

Giancarlo M Izzi

Robert M Rogers

Brad E Kahlbaugh

Davis B Moravec

Gregory S Tronnes

Qiong Gao

Jason A Tiffany

Richard Patrick DeJong

Timothy O Winters

Keith Alderson

Chad M Goltzman

Richard Patrick Dejong

Fibrous filter medium that includes a surface-loading filter layer comprising fine fibers having an average diameter of less than 1 micron; a depth loading filter layer; and a support layer; wherein the layers are configured and arranged for placement in a gas stream with the surface loading filter layer being the most upstream layer.

Filter media, elements, and methods

Disclosed are filter media packs having a single layer of a high loft filter media and a single layer of a low loft filter media, the filter media pack characterized by the absence of oil added to the filter media pack, the filter media pack capable of filtering air laden particulates from an air stream at greater than 94% efficiency at air stream flow rates of between about 100 feet per minute and 3000 feet per minute. Also disclosed are filter assemblies formed from the filter media pack, and methods of using the filter assemblies.

Filter media pack, filter assembly, and method

Growing community of inventors

Minneapolis, MN, United States of America

Giancarlo M Izzi