The machine operation system is when press start to operating. The system will control Pneumatic Cylinder to move down for pulling the Filling cylinder. Working is absorbed the liquid from mixer tank come filling head valve will be opened. The liquid is filled in filling cylinder will inject liquid into the bottle till finish all the cylinder as the quantity is adjusted. Finish one round of system then continue to next round. The operation of this machine is the mainline of Gravity filling system. The difference and qualification of the machine depend on filling nozzle, quantity are the cause and result of different qualification.