Series EBV Actuators have many clear and important advantages:

•  Manual override is direct to valve -- not through a gear train -- to eliminate potentially hazardous conditions. Do not consider a valve actuator without manual override unless you have a convenient and regularly tested shutoff capability as backup.
•  Many "discount" actuators are not thermally protected. They could potentially run and run until overheating leads to failure or even fire.
•  Series EBV position indicator is mechanically attached to the valve shaft and the running lights are wired to the motor. Indicator lights on most low cost actuators are electrically wired to your supplied signal. If the valve is jammed, if the motor burns out, if the gear box strips -- the light will not indicate the position of the valve -- it simply indicates your electrical signal.