Suitable for ball and butterfly valves. Built by two concatenate worm gear reducer groups largely reducing operating time and giving a high outlet torque.
The design allows the disconnection of both reducers, thus the valves can be manually driven through the outlet reducer.
The fact that the end of stroke control group, whose levers joined to the shaft of the valve act on the micro switches, lies on the final power reducer only allows synchronization when working manually.
They work by means of a standardised three-phase, monophase or direct current electric engine.