Spartan Valves ME7140 Tri-State Floating Actuator 24VAC

The Spartan Valves ME7140 Tri-State Floating Actuator is an electric component used in standard heating, ventilation, and air conditioning systems. Operating on 24VAC control power, it provides floating three-point control to position valves incrementally based on controller signals. Installed in HVAC systems, it is typically mounted on the terminal unit or zone valves to regulate the flow of heated or chilled water through coils. It modulates flow control, coordinates valve positioning with control inputs, and helps maintain stable thermal output and balanced distribution across different zones during normal operation.