Siemens 18Nm GCA Series Fail Safe Damper Actuators

Siemens Electronic motor driven actuators for two-position, three-position, and modulating control.

• Nominal torque 18 Nm, with spring return, self-centering shaft adapter
• Mechanically adjustable span between 0...90°
• Prewired with 0.9 m long connection cables.
• Type-specific variations with adjustable offset and span for the positioning signal, position indicator, feedback potentiometer and adjustable auxiliary switches for supplementary functions. 
• For damper areas up to 3 m2, friction-dependent.
• Use In ventilation sections where the actuator must move to the zero position (emergency position) during power failure.