ST series Automatic barrel outer brushing machine specially work with 5 Gallon barreled water producing line. It is used for reducing the settling caused by the mineral water itself and some algae substances in the process of mineral water producing. With the omni-directional cleaning including the bottom, inner and outer of the barrel, the machinery improves the cleaning efficiency remarkably and reduces the possible pollution caused from manual washing and decreases the worker’s pressure. The machine is made of excellent stainless steel with the advantage of easily-rinsing and corruption-resistance. The main electrical elements adopt the products with brands of SIEMENS and OMRON. Pneumatic elements adopt the products with brand of AIRTAC. The machine works reliably and efficiently based on the compact structure and high automatic technology. It is the fully automatic barreled water producing equipment combined with machine, electronic and pneumatic components.