Hysteresis Motor,synchronous motor,used in motorised valve for HVAC system,can also supply reversible type,popular 5w 5rpm ... to HAVC system,AC Hysteresis Synchronous Motor1, AC Hysteresis Synchronous Motor is used to HAVC system, Electric Valve, Riming Set ... type: Gear/Shaft 3, Hysteresis Synchronous Motor is used to HAVC system, Electric Valve, timing Set etc. Hysteresis Motor for Motorized Valve