Subsea shut-off device

A subsea shutoff device, in particular for use in water depths of more than 30 m for operating a valve with a gate, said subsea shutoff device comprising:

• a housing, which is waterproof and oil filled;
• a crank mechanism arranged in the housing;
• and
• a rotary actuator,
• wherein the rotary actuator is adapted to operate the gate of the valve via the crank mechanism,
• wherein the crank mechanism comprises a thrust crank mechanism with a crank, a thrust rod and a joint rod with a first and a second end, wherein the first end of the joint rod is fixed on the crank, and the second end of the joint rod is connected with the thrust rod via a joint, and the thrust rod is adapted to operate the gate of the valve,
• wherein the crank comprises a first end stop and a second end stop, and a rotational movement of the crank is only possible between the first and the second end stop,
• wherein the first end stop and the second end stop define a maximum angle of rotation for the crank of more than 180°,
• wherein the first end stop and the second end stop define a maximum angle of rotation for the crank, and the maximum angle of rotation is less than 240° max, and
• wherein the rotary actuator comprises an electric motor and a transmission.