The discharging system (S) according to the present invention comprises a fixed body (1); a movable body (2) which is movably connected to the fixed body (1) by means of movement pin (9), and which comprises a lower part (6) where the said cylinder (T) is placed and an upper part (7) which is located on the lower part (6) in such a way that there exist a space therebetween; a discharging arm (3) which moves in such a way that it gets close to the cylinder (T) to be placed on the lower part (6) from the said upper part (7) towards the lower part (6) and moves away from the cylinder (T), which has an arm connection (10) that settles on the valve (T1) of the cylinder (T) as it gets close to the cylinder (T) and which constrains the cylinder between itself and the lower part (6); and which discharges the combustible gas in the cylinder; a transfer line for transferring the combustible gas received by the discharging arm (3) to a storage unit; and a movement element (5) which ensures that the cylinder (T) placed on the movable body (2) takes an upside-down position by moving the movable body (2) relative to the fixed body (1).