AJR Filtration, part of the AJR Group family of companies, has been proudly manufacturing in the USA since 1997. We have grown to become a leading US-based manufacturer of high-quality engineered liquid and dust filtration products made in the USA, serving the distribution, reseller and OEM markets. Our 140,000 square foot facility located in West Chicago, Illinois is centrally located for transportation routes serving the United States and Canada. At AJR Filtration, we take personal pride in our superior customer service and comprehensive technical support. Our goal is to achieve a "Most Valued Supplier" status with every customer. Fastest Lead Times! AJR maintains a large in-house inventory of raw materials and components and we offer free stocking programs to get filters out the door as quickly as possible and on their way to you.