ICO3S valves are in operation in both upstream and downstream solutions, has global certifications, and due to their exceptional reliability are often found on Safety Instrumented Systems. The ICO3S direct-acting solenoid valve where the line media is applied to the inlet port A. When power is applied to the solenoid, the valve opens and there is flow to the outlet port B. When the power is removed, the spring closes the valve and the valve exhausts through port C.