The QBY series air operated diaphragm pump is the present home most novel one kind pumps the kind. Regarding each kind of corrosive liquid, the belt pellet, the high viscosity, are easy to volatilize, to be flammable, explosive, the violently poisonous liquid, the ceramic porcelain glaze thick liquid, the glue water, the oil tanker bilge oil recycling, temporary and so on the liquid can give to draw out completely attracts. Its performance parameter and Germany's WLLDENPUMPS, US'S MARIOWPUMPS is close. The pump body has flowed the part material quality to use the stainless steel, the aluminum alloy, the engineering plastics, the mutual lack of understanding basis different liquid separately uses the Ding eyeball rubber, the fluorine rubber, the chloroprene rubber and the teflon four kinds. The QBY series air operated diaphragm pump, uses the compressed air, the steam, the industry waste gas is a power supply, 7m, lifts 0 - 50m steplessly, current capacity 0.8 - 30m3/h may move.