The Johnson Controls VA9203-BGA-2 is an electronic valve actuator designed to automate ball valves in HVAC systems, namely zone control and air handling units. This compact and lightweight (2.71 lbs) machine has a spring-return mechanism. When powered by 24V AC power, the motor moves the valve to a specific on or off state (2-position control) within 75 seconds. https://www.partshnc.com/24v-75s-2pos-sr-actuator