Flow controlling device for controlling the amount of a fluid flowing through a duct

The flow control device (1b) controls of fluid (M) passing in a flow direction (FR) through the flow channel (2). Two diverting elements (4a, 4b) can turn on central axes (ZA) between a first position (I) in which the channel is closed, and a second position (II) in which it is open. The diverging elements can be controlled separately from each other.