The 3S multi-turn actuators have been constructed particularly for butterfly and ball valves with gears as well as for gate valves. The actuators are waterproof and installed directly into the ground beneath a standard street cap or a manhole cover by utilizing the patented 3S earth placement or alternatively flanged directly onto the valve according to EN ISO 5210. The valve can still be operated manually via a standard square-end on top of the actuator.
In any case, manhole or underground construction is not necessary. This makes retroactive automation of buried valves economically feasible.