The Schneider Electric (Erie) AP33A000 is a cutting-edge 24V non-spring return actuator that will transform HVAC system control. It provides accurate modulation for valves, dampers, and other HVAC equipment when using a 0–10V DC or 4–20mA control signal. https://www.partshnc.com/ap33a000-schneider-electric-erie-24v-nsr-0-10vdc-or-4-20ma