The emergency hand control for hydraulic and pneumatic actuators is an optional element that enables manual operation of the valve in the event of an anomaly in the actuator cylinder or lack of motor fluid preventing the valve from operating.

It is fitted on the housing of the actuator on the opposite side from the cylinder and on the same geometric axis, forming a single unit along with it.

The emergency hand control is constructed in two different ways, depending on the operating torque and on the diameter and series of the valves.