Spring Return Fail-Safe, On/Off Damper Control Actuator, Direct Coupled - 24 VAC/DC (No Aux Switch)

Features:

• Cut labor costs with simple direct coupling.
• True mechanical spring return - the most reliable fail-safe.
• Mount for clockwise or counterclockwise fail-safe.
• Check damper position easily with clear position indicator.
• Don't worry about actuator burn-out. Belimo is overload-proof throughout rotation.
• Need to change control direction? Do it easily with a simple switch (modulating actuators).
• Golden Point breather membrane optimizes performance in harsh airstream environments.
• Built-in auxiliary switch(s) is easy to use, offers feedback or signal for additional device (NFB24-S2 US has two switches, the NFB24-S US and NFB120-S US have one switch).
• Microprocessor-controlled brushless DC motor increases actuator life span and reliability, provides constant running time (modulating actuators).
• Rugged metal housing withstands rough handling in the mechanical room.
• 3 ft. appliance rated cable and conduit connector eases installation.

The NFB24 is used for On/Off, fail-safe control of dampers in HVAC systems. Actuator sizing should be done in accordance with the damper manufacturer's specifications. Control is On/Off from an auxiliary contact, or a manual switch.

The NFB series actuators provide true spring return operation for reliable fail-safe application and positive close off on air tight dampers. The spring return system provides constant torque to the damper with, and without, power applied to the actuator.