Overview
The Belimo NF24A-VST is a spring return rotary fail-safe actuator specifically designed for Volume Regulation Units (VRU) in HVAC systems. It provides 90 in-lb of torque with IP54 enclosure protection.
Features
- Spring return mechanism guarantees safety positioning upon supply voltage loss
- Engineered for smooth integration with VRU air management equipment
- Overload protection prevents motor damage during stall conditions
- IP54 rated housing protects internal electronics from dust and moisture
Specifications
- Actuator Type: Spring return fail-safe
- Torque: 90 in-lb [10 Nm]
- Voltage: AC/DC 24 V
- Running Time (Motor): 120 s
- Ingress Protection: IP54
- Angle of Rotation: 95°
Applications
- Fail-safe airflow control in Volume Regulation Units (VRU)
- Commercial VAV and CAV ventilation system dampers


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