The sauter ASF 113S is a spring return actuator for controlling air dampers and other similar devices. It offers precise positioning and easy installation, making it ideal for various applications in the HVAC industry. The actuator features a compact and robust design, suitable for use in harsh environments. With its high torque and adjustable stroke, the ASF 113S can handle a wide range of damper sizes and requirements. Additionally, it comes equipped with auxiliary switches for position indication and end position feedback, allowing for accurate control and monitoring of the damper position.