Closure device for flexible pouches

Closing device (20) for a flexible container containing a medical fluid comprising: - a section of the base (22) provided with a top wall (28), a bottom wall (29), said base section being adapted to adjusting said flexible container; - A support for the finger (26) connected to said base section (22) and adapted for a user to grip said closure device (20); - A cylindrical element (40) provided with a first hole (44) and a second orifice (42), said cylindrical member (40) being adapted to allow said medical fluid to flow therethrough and exit said flexible container ; - A first seal (46) covering said first opening (44), blocking said cylindrical member (40); and a second seal (70) covering said second hole (42); wherein a portion of said cylindrical member (40) between said first seal (46) and said second seal (70) defines a chamber (72), wherein said cylindrical member (40) extends through said section of the base (22) and said finger support (26); said first hole (44) being in said base section (22); said second hole (42) being in said finger support (36); said first gasket (46) comprises a weakened section (46) that can be broken; and said second seal (70) can be overcome.