The Siemens GDE131.1U is a non-spring return damper actuator designed for precise floating control in HVAC systems. Operating at 24V with a 44 in-lb torque output, it modulates air dampers to maintain accurate airflow and temperature regulation. Commonly used in air handling units, VAV systems, and ventilation dampers, it ensures reliable performance and energy-efficient operation. https://www.partshnc.com/gde1311u-siemens-building-technology-damperact-24v-nsr-fltg-44inlb