VALVE
A vale (1) for restricting and closing plastic tubing, comprising a base (2) having a surface (10) for holding a plastics tube, two side guides (6,8) extending from the base, a top (4) provided with a restriction member (12) and means (20,22) for raising and lowering the restriction member on to a seat (10) . One of the side guides (8) is pivotally connected to the base and connectable to the top. The top having a bifurcation (34) to accept the guide, a seat (36) being provided on the bifurcation to hold a head (30) on the side guide. The valve can be placed round a plastics tube and the restriction member positioned to set the flow through the tube . To remove the valve from the tubing, depression of the top releases the head of the side guide from its seat opening the valve .