Price: $845.00. Dungs 4-20 mA Actuator. Actuator, LF24-SR US. Price: $249.00. Belimo Damper Actuator, 35 in/lb, Spring Return, 24V, Modulating. Damper Motor, Honeywell M436A 1116. Price: $387.00. Honeywell Spring return Damper Motor for two-position back draft, zone, or minimum position damper control. 120 volt. Damper Motor, LF120 US.