The Siemens GMA161.9E is an electromotive rotary actuator with spring return for fail-safe function, designed for controlling 2-port and 3-port control ball valves in heating, ventilation, and air conditioning (HVAC) systems. It is compatible with valves featuring internally or externally threaded connections (DN15 to DN50). The GMA161.9E is suitable for modulating control with a DC 0…10 V positioning signal. This actuator is built with robust, brushless DC motors, ensuring reliable operation and long-term maintenance-free performance. It also includes spring return functionality for power failure scenarios, moving the actuator to its mechanical zero position.

Key Features:

• Nominal torque: 7 Nm
• Spring return for fail-safe operation
• Modulating control with DC 0…10 V positioning signal
• Operating voltage: AC 24 V / DC 24…48 V
• Maintenance-free, low-noise operation

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