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Graco Husky 515 air-operated double diaphragm pumps come in 12.7mm (1/2 inch) porting size and can operate on as little as 7 bar. The pumps feature a stall-free low pulsation air valve, providing a smooth and rapid changeover. The bolt-through fluid cover design eliminates leaks, making the Husky 515 safer and more reliable than other AODDs.
Husky 515 pumps are available in different materials of construction, including polypropylene, acetal and PVDF construction to suit various working fluids.

Graco air-operated double diaphragm (AODD) pumps use compressed air as a power source. The compressed air is shifted from one chamber and then to the other side by a linked shaft. This movement allows the chambers to move simultaneously. This back-and-forth motion forces liquid out of one chamber and into the discharge piping while simultaneously filling the other chamber with liquid. These pumps use reciprocating elastomeric diaphragms and check valves to pump fluid. The liquid chambers are filled and emptied by fluid that is drawn through a common inlet and discharged through a single outlet.