Kromschroder Actuator IC50-30W20E 74215229

The Kromschroder IC50-30W20E actuator (SKU 74215229) is a rotary actuator designed for precise control of butterfly valves, such as the DKR, in applications involving hot air and flue gas flow. It operates with a three-point step signal and provides a torque of 20 Nm with a holding torque equal to the running torque. The actuator runs on 230 V AC at 50–60 Hz, has a duty cycle of 100%, and weighs 2500 g. It features a 0–90° adjustable angle of rotation, screw terminals for cables up to 2.5 mm², and a protection class of IP with safety class I. The device is certified to 2014/35/EU, 2014/30/EU, and EN 60730:2011, and is suitable for ambient temperatures from -20 to +60 °C (storage -20 to +40 °C) with no condensation permitted.

When selecting an actuator of this type, ensure the supply voltage, frequency, torque, and control signal (three-point step) match the application. The actuator must be mechanically compatible with the valve shaft and mounting flange, and the angle of rotation should be adjustable to the required range. Check the cable cross-section and line entrance size to ensure proper electrical connection. The ambient and storage temperature limits must be respected, and condensation must be prevented.

Common failures of such actuators include motor burnout due to overloading or continuous operation beyond duty cycle, gear wear leading to loss of torque or erratic movement, and electrical faults from moisture ingress or loose connections. Symptoms may include the valve not moving to the commanded position, slow or jerky operation, or the actuator overheating. Check for proper voltage, signal continuity, and mechanical binding, and inspect for condensation or water damage.