The difference is that the electric device is the original device that controls the valve switch by the motor's forward and reverse rotation. It cannot be adjusted accurately, and the torque cannot meet the great requirements. The actuator was developed on his basis to meet the actual application. High-end, more stable and practical

Valve electric actuator mainly refers to "electric push rod", also known as "linear actuator", used to adjust and accurately control the opening and closing position of the valve.

Valve electric device is the title of the whole set, including electric push rod. Valve electric actuator

Electric actuators are a "subset" of electric actuators for valves.

Respectively: 1. Different driving energy sources 2. Different cut-off mechanisms