A device for controlling or regulating various valves such as gate valves, plug valves, and control valves in open-loop or closed-loop control systems, with maximum protection rating of IP68. The 2SA30 switch-type electric actuator has an output torque range of 10 Nm - 400 Nm and a speed range of 5 - 160 rpm; the 2SA35 control-type electric actuator has an output torque range of 1 Nm - 2800 Nm and a speed range of 5 - 40 rpm.