M&E offers used Diaphragm Pumps designed for reliable transfer of fluids in food, chemical, pharmaceutical, and wastewater applications. These air-operated double diaphragm (AODD) pumps are ideal for handling viscous liquids, slurries, and solids-laden materials, offering self-priming capability and the ability to run dry without damage. Commonly used for batching, unloading, and process transfer, diaphragm pumps provide flexible operation across a wide range of flow rates and materials of construction. Our inventory may include equipment from leading manufacturers such as Wilden, Sandpiper, ARO, Versa-Matic, Graco, and Pulsafeeder, known for durability and consistent performance. With access to one of the largest inventories of used pumps available, M&E can help you find the right diaphragm pump to match your flow, pressure, and application requirements.