A flow control device for medical liquid is disclosed, comprising: a housing (1) having an inlet (2) and an outlet (3), and a channel (7) formed in an inner surface of the housing, said channel extending at least partly in axial direction a rotatable member (5) rotatable in relation to the housing without being axially displaced, said rotatable member having at least two apertures (9a-9c) and a core member (4) arranged inside said rotatable member, fixedly connected to said rotatable member. A helical flow path (8) being formed between the lateral surface of the core member and the inner surface of the rotatable member, said at least two apertures of the rotatable member being in communication with said helical flow path, and wherein each of said apertures debouches into the channel in at least one rotational position of the rotatable member. Further, a flow path is formed between the inlet and the outlet of the flow control device, the flow path comprising at least part of the helical flow path and the channel, wherein the flow is controlled by the rotational position of the rotatable member, determining which of said at least two apertures to be in communication with said channel, and thereby determining the length of the helical flow path to be comprised in said flow path between the inlet and the outlet.
