The electric expansion valve (EXV) has the ability to follow load, in most cases, from about 5 to 115 percent of nominal load.
In addition, flash gas in the liquid line is less damaging to the operation of the system because the relatively large port and large stroke of the EXV allows them to open wide, purge the flash gas, and then re-establish the desired superheat. The advantages of the EXV are clear, but since the valve is an electric component, it requires some form of electric or electronic control.