A self-sealing bag valve

(57) the self-closing bag valve used with the rapid disconnection type tube fitting in the assembly object for bag-in-box (BIB) syrup distribution of a summary post mix type drink dispenser, It has a plastic spring assembly object (10) for always forcing the poppet (30) of a self-closing valve so that it may cooperate with the valve seat (38). The petal-like segment (14a --) which the spring assembly object (10) could vacate the interval equally, and has defined the channel in betweenIt has a petal-like disk (14, 16) which has 16a, a ring for maintenance (12) which secures the circumference portion of a petal-like disk in the fixed position of the hole of a self-closing valve, and the petal-like stem (18) extended from the disk so that it may cooperate with valve poppet. A petal-like disk has the 1st truncated cone portion extended on the ring and the concentric circular terminal line from the ring for maintenance, and the 2nd truncated cone portion extended from the circular terminal line to the petal stem. When it is always which was installed in a forcing position (closed position of a self-closing valve), the 1st and 2nd truncated cone portions, It has an inclination for opposite about a petal-like disk and a right-angled axis line, and in order to accept a bend of the component near Knee, the bend of the circumference of the circular terminal line which forms Knee in each petal-like segment is offered. In order to accept snap conformity (12a) of the ring for maintenance (12), a slot (50d) is prepared in the central hole of a valve housing.