in the design and manufacture of quality solenoid valves. ASCO products are designed to control the flow of air, gas, water, oil and steam. Our heritage of innovation has resulted... in an extensive line of ASCO products that range from two position on/off valves to entire flow control solutions designed to meet requirements of thousands of customers. Whether you... need a minor modification of a core product or a complete flow control solution, we can help. ASCO offers the world's largest selection of standard valves to handle virtually any...