Maintaining headquarters in New Berlin, Wis., ACS Group Sterling provides technical services and auxiliary products, including cooling towers, chillers and steam traps, for the plastic industry and other markets. With manufacturing facilities located in Milwaukee, Wis., South Attleboro, Mass., and Wood Dale, Ill., the company employs more than 600 trained employees. Additionally, ACS Group Sterling maintains a worldwide sales network. Founded in 1916, the company s main business was manufacturing valves, traps and condensate pumps for steam and hot water systems.