Air operated double Double Diaphragm Pump diaphragm pumps (AODD) operates with compressed air rather than an electrical motor, as the name suggests. Because of their particular operating characteristics, they can be employed in conditions when an electrically powered pump would be ineffective (e.g., when pumping flammable liquids). Therefore, Air operated double diaphragm pumps (AODD), pneumatic double diaphragm pump, positive displacement pump are some of the most sought out machines. However, these pumps, by their very nature, must be installed and maintained correctly to work as intended.