The Siemens S55155-A110 Non-Spring Return Valve Actuator is a small and efficient actuator for precision HVAC system management. This actuator, which runs on a 24VAC/DC power source, is designed to deliver dependable performance in a range of HVAC applications. Its 0–10VDC control signal enables smooth valve position modulation, guaranteeing ideal flow control and energy efficiency in... https://www.partshnc.com/s55155-a110-siemens-ssc16105u-261-24v-non-spring-return-electronic-valve-actuator-fail-in-place