The operation of a double diaphragm pump, or pneumatic diaphragm pump, is both simple and effective: they are pneumatic pumps suitable for transferring fluids with reciprocating motion. The pneumatic diaphragm pumps are equipped with two opposing pumping chambers, hermetically divided into two, one in contact with the compressed air and the other in contact with the pumped fluid. The diaphragms, placed between two pumping chambers and activated by the pneumatic motor, and the valves, designed to ensure the total passage of the fluid both inlet and outlet, are the only parts in contact with the fluid.
Air operated double diaphragm pumps, or air operated diaphragm pumps, are designed and manufactured to pump a wide range of fluids even with high viscosities and with suspended solids. They can also be used for heavy-duty applications such as environments with high humidity or potentially explosive atmospheres thanks to the ATEX Directive with which they are equipped. Unlike other types of pumps, the diaphragm pump for liquids has no limits of use, also adapting to dry operations, to mix fluids, in self-priming and submerged.