The Siemens SSB81U is an advanced electro-mechanical actuator designed for precise control in HVAC systems. This 3-position floating valve actuator operates on a 24V power supply and offers reliable performance for managing various HVAC components. The Siemens SSB81U is a 3-position floating valve actuator that provides accurate and dependable control for HVAC systems. https://www.partshnc.com/24v-elect-mech-3posfltvlvact