Sealing valve arrangement for a shaft furnace charging installation

A sealing valve arrangement for a shaft furnace charging installation, said sealing valve arrangement comprising:

• a shutter that cooperates with a valve seat;
• a shutter-actuating device for moving said shutter between a closed position in sealing contact with the valve seat and an open position remote from said valve seat;
• wherein said shutter-actuating device comprises:
• a tilting shaft connected to said shutter;
• an electric motor with an output shaft connected to said tilting shaft, said electric motor disposed between a braking device and said tilting shaft;
• said braking device associated with said electric motor, said braking device being configured for stopping said output shaft of said electric motor from rotating;
• and
• a transmission means arranged between said output shaft of said electric motor and said tilting shaft, wherein said transmission means comprises a backlash configured for having a predetermined amount of allowed rotation between said output shaft of said electric motor and said tilting shaft, whereby a rotational movement of said tilting shaft is absorbed by the transmission means and not transmitted to said output shaft or to said braking device such that said output shaft is immobilized by said braking device.