Air Storage Tank plays an important role in the field of industrial and mining, petroleum, chemistry, pharmacy, slub, building and furnace, which has the function of air-compressor and pressure stabilizer. It can eliminate or reduce the periodical air flow pulsation of the air compressor, stabilize the pressure in pipe, supply power to pipeline to finish the pneumatic program operation after machine halt. Meanwhile the Air Storage Tank can compres s air, dewater, defaecate, etc.