Honeywell M6435A1004 1/2-3/4" S/R Floating Actuator is used with 24V V58XX valves in HVAC system applications. This actuator is a key element in controlling the movement of fluids in HVAC learning systems including the movement of water or the refrigerant. It works by getting a 24 volt electrical signal from a thermostat or control system. The actuator’s internal mechanism is activate... https://www.partshnc.com/24vsr-fltgactforv58xx-12-34-2