Liquid filling machine can be divided into two kinds of atmospheric pressure and pressure, atmospheric pressure filling machine is under atmospheric pressure by liquid self-weight filling, this kind of filling machine is divided into timing filling and fixed capacity filling two kinds of filling machine is only suitable for filling low-viscosity liquids that do not contain gases, such as milk, white wine, mineral water and so on. Pressure filling machine is higher than the atmospheric pressure for filling, the pressure in the storage cylinder is higher than the pressure in the bottle, the liquid flows into the bottle by the pressure difference, the high-speed production line is mostly used in this way. Pressure filling machine is suitable for filling liquids containing gas, such as beer, soft drinks, champagne and so on. *