A flow control device for medical liquid including a housing having an inlet and an outlet, and a channel formed in an inner surface of the housing, the channel extending at least partly in axial direction; a rotatable member rotatable in relation to the housing without being axially displaced, the rotatable member having at least two apertures; and a core member arranged inside the rotatable member, fixedly connected to the rotatable member. A helical flow path is formed between the lateral surface of the core member and the inner surface of the rotatable member, the at least two apertures of the rotatable member being in communication with said helical flow path, and wherein each of the apertures debouches into the channel in at least one rotational position of the rotatable member.