028-A550-AB3 - air-operated double diaphragm pumps Mod. A550 in ALUMINIUM Gasket in ptfeair operated double diaphragm pumpshave long been recognized as the most flexible pumps of the industry for handing difficult liquids at relatively low pressures and flows. The range of applications is virtually limitless. Meclube AODDpumps come in many sizes and choices of materials of construction. Almost every type of liquid from highly corrosive acids through high viscosity paints and adhesives. to food and drink products can be pumped. "