Belimo 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 system...