STC develops & distributes high performance advanced precision solenoid process valves for air, gas, water, liquid & steam. As a solenoid valves manufacturer, we offer air solenoids, solenoid water valves, stainless steel solenoid valves, electric solenoid valves, air valves, 2 & 3 way solenoid valves, pneumatic valves & more. Excellent prices & service. Choose from inventory & custom options.