Servo Motors BPZ:SQN72.4A4B20

Siemens Servo Motor | Damper Actuator SQN72.4A4B20

The Siemens SQN72.4A4B20 is an electromotoric damper actuator — also known as a servo motor — used to position gas/air dampers and fuel-air ratio control linkages on oil and gas burners and heating plant. It completes a 90° stroke in 12 seconds (50Hz), delivers 2.5Nm of nominal torque, and permits a maximum rotation angle of 160°. The unit carries two free auxiliary switches plus two end switches, is rated IP54, and runs on a 230V~, 50-60Hz, 6VA supply. Manufactured by Siemens AG, Germany, and supplied by R.K. Instruments & Controls.