Aluminum alloy Pneumatic Theroy Spray Pump Diaphragm Pump High-Pressure Double Acting Diaphragm Pump. Using air pressure range. The highest use coating stress. The measure of the spit out. The largest use paint viscosity. Using the temperature range. Used in fine chemical industry in a variety of precious liquid, high harmfulness, high corrosion resistance and other dangerous material transportation, because we have no dynamic seal structure of pneumatic diaphragm pump, completely separated from the outside world, and no material leakage on the ground without a foundation, is very small, easy to install and the economy.