AODD pumps are almost completely leak-free. Because there are only stationary seals between the wetted parts and the surrounding environment, leakage can occur only if one or both diaphragms fail. Diaphragms should be replaced on a regular basis as part of a general maintenance programme, according to the manufacturer’s recommendations. Because of the benefit of pressure balancing provided by the compressed air supply, diaphragms in an AODD pump wear less than those in a mechanically driven diaphragm pump.
AODD pumps can handle abrasive, highly viscous fluids, sludges, and slurries. Furthermore, because of the gentle pumping action, they are ideal for shear-sensitive fluids. The four internal check valves are typically designed with a ball (or cone)/seat or a flap. Ball valves offer a better seal and are less prone to wear than flap valves. Because flap-type valves are hinged, prolonged use causes fatigue at the flexing point. Because the ball is free to rotate during operation and settle in a different position on the seat, ball valves wear more evenly. Flap-type check valves have the advantage of being able to pass large solids entrained within the pumped fluid more easily.
An AODD pump can be run dry indefinitely because there are no internal seals or moving components that require lubrication or cooling. AODD pumps are self-priming, with some having a suction lift of up to 8m.
Because they are powered by compressed air rather than electricity, AODD pumps are suitable for use in hazardous areas. As long as the air vent is above the liquid level, an AODD pump can be safely submerged.