DA0054HY HVAC electric motor 24v damper actuator Overview: This spring return air damper actuator is special designed for small and medium-sized air damper as well as for terminal control unit of air volume system. It is usually used in somewhere space limited because of its small size and flexible control. Feature: l Can be single control l Set up independent running time l Screw terminal connection l Universal adapter:circular shaft,maxφ18mm l optional rotation angle l With two groups of floating auxiliary switch l Valid for set in advance l Adopt steady,compact,anti-collision steel shell l Permanently sealed shell conform to Standard IP54