ARO Pro Series of diaphragm pumps

The 2- and 3-in. ported metallic models in the ARO Pro Series of diaphragm pumps are now available in additional materials of construction. Previously offered only in aluminum, the Pro Series now includes cast iron and stainless steel models. Like their aluminum counterparts, the new models feature patented air-valve technology that eliminates pump stalling by utilizing an unbalanced design — by creating an optimal pressure differential, air valves do not center, even under low air inlet pressures. Unbalanced valves reduce production loss and downtime by providing better shift signals and delivering faster trip-over with more flow (172 gal/min and 237 gal/min, for 2-in. and 3-in. models, respectively). With bolted construction and a variety of material options, these pumps feature leak-tight integrity and excellent chemical compatibility. O-rings and U-cups prevent air leakage by providing a positive seal as the air valve shifts. Air flow stops when the fluid flow stops.