Phase separating tube

A phase separation centrifuge tube for separating fluids, the tube comprising an inlet and an outlet for fluid, and a cavity for receiving fluid, the outlet interconnected by a first passageway in fluid communication with the cavity through which fluid may flow out of the tube, the tube further comprising a fluid control valve comprising:

• i) a second passageway extending substantially transverse to the first passageway and a plug disposed within the second passageway, the plug movable between a valve-closed position in which the plug seals the first passageway, and a valve-open position in which the first passageway is continuous to enable the flow of fluid from the cavity out of the tube;
• or
• ii) a plug disposed within the first passageway, the plug further comprising an inlet, outlet and a continuous channel extending therebetween, the plug movable between a valve-closed position in which the plug seals the passageway, and a valve-open position in which the continuous channel is in fluid communication with the first passageway to enable the flow of fluid from the cavity out of the tube,
• wherein the first passageway is defined by a first section extending from the cavity and a second section in fluid connection with the first section, wherein the first and second sections are not coaxial with each other such that the passageway is non-linear, and wherein the first and second sections are substantially parallel with the longitudinal axis of the tube,
• and wherein the first passageway further comprises a junction, fluidly connecting the first and second sections, which junction is substantially perpendicular to the first and second sections.