Electric switch function: open or close the core of electric control valve according to the control signal of room thermostat; 

Dynamic balance function: when opened, the valve is able to dynamically balance the pressure change of the system within the range of operating differential pressure, so that the flow is always maintained constant regardless of system pressure fluctuation.

Keep the flow rate constant at the design flow: It can be set when leaving factory according to the design flow of end equipment, so that the flow rate is always maintained at the design flow required by the end equipment.