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An air operated diaphragm pump (AODD pump) is a type of positive displacement pump that uses compressed air to move a flexible diaphragm, which in turn pumps a fluid. AODD pumps are often used in applications where the fluid being pumped is abrasive, corrosive, or viscous, as they are capable of handling difficult-to-pump fluids with minimal wear on the pump. They are also known as pneumatic diaphragm pumps, air diaphragm pumps, or diaphragm air pumps. AODD pumps are commonly used in a variety of industries, including chemical processing, water treatment, and manufacturing. They are known for their versatility, as they can be used for both high and low flow rates, and can be used to transfer liquids, gases, and slurries.