Once required the quarter turn pneumatic actuator can be equipped with a manual emergency handwheel

The device can be integrated either in Double Acting and Spring Return versions.

For the proper functioning of the system and for the mechanical integrity of the device is essential to ensure that the pneumatic actuator is disconnected from the power lines of compressed air before performing any operation using the manual emergency handwheel

The manual emergency handwheel acts on the transmission of the primary mechanical transmission of the pneumatic actuator and with torques applied to the handwheel according to UNI EN 12570-2001

it releases output torque of equal value of the nominal torque of the actuator.