Damper-actuator fail-safe for adjusting air dampers in technical building installations Air damper size up to approx. 0.8 m² Torque motor 4Nm Nominal voltage AC/DC 24V Control signal modulating 2...10VDC Position feedback 2..10VDC Running time motor: 150s Running time spring: 20s Delivery Lead Time: 1-2 weeks upon order confirmation