Asco Controls offers a wide range of products and is the leader of solenoid valves. We combine 100 years of experience with technology. Asco Controls offers the largest selection of 2, 3 and 4-way solenoid valves. A solenoid valve, the electromagnetic part of the valve which consists of a coil. The valves of Asco Controls supplied by ITT Controls are made to the most demanding fluid control applications to execute.