An actuating system for a quarter-turn rotary valve

A device (1) for controlling a position of a rotary valve, comprising:

• a rotatable element (11) configured to control the position of the rotary valve based on a rotation in a direction or in an opposite direction;
• and
• means (21, 22, 30, 50, 54, 52) to cause said rotation of the rotatable element (11), said means comprising,
• a first and a second antagonist feeder conduits (2, 3) that generate a linear motion,
• a first septum (30) slidingly disposed to have a linear motion inside the first feeder conduit by action of a pressurized fluid,
• a second septum (52) slidingly disposed to have a linear motion inside the second feeder conduit, and
• a biasing member acting on the second septum to cause the second septum to return to an initial position after the first feeder conduit is depressurized,
• wherein said rotatable element (11) is a pulley and said means (21, 22, 30, 50, 54, 52) further comprises a wire (21, 22) anchored to the pulley and to said first and second septa to cause a rotation in a direction or in an opposite direction of the pulley due to application of a pre-determined traction on the wire obtained through the linear motion generated by said first and second feeder conduits.