W.S. Darley & Co. (Darley), founded in Chicago in 1908 by William Stuart Darley
W.S. Darley & Co. (Darley), founded in Chicago in 1908 by William Stuart Darley, is a fourth-generation family-owned global manufacturer and distributor of equipment for military and first responders, headquartered in Itasca, Illinois. Initially focusing on municipal supplies, Darley began concentrating on fire equipment in the 1920s, manufacturing fire pumps, apparatus, and later, Compressed Air Foam systems and water purification systems. The ISO 9001:2015 certified company, which was the first pump manufacturer to receive ISO 9001 certification, serves over 125,000 customers in more than 100 countries and is a major government contractor




