The invention relates to a compressed-air device for controlling valves, including, in a longitudinal direction: a first vane-type rotary actuator (1) having a front surface (2) as well as a back surface (4), said front surface (2) being provided with a rotatable head (3); and a second vane-type rotary actuator (10) having a front surface (11) as well as a back surface, each of said first (1) and second (10) actuators being supplied with compressed air via a compressed-air valve connected to two ports (7, 8, 14, 15) on each of said first and second actuators.