Deltrol Controls is located in Milwaukee, Wisconsin, and is a wholly-owned subsidiary of Deltrol Corp. For over 50 years, we have designed and manufactured solenoids, relays, valves, and custom assemblies for a variety of applications. Our Milwaukee operation employs approximately 125 people, working out of a 110,000 square foot manufacturing facility. We also have manufacturing capabilities in other parts of the world that allow us to be a globally competitive supplier.