Ingersoll Rand ARO 666100-3C9-C Diaphragm Pump

Ingersoll Rand ARO 666100-3C9-C is a 1-inch metallic diaphragm pump from the Pro Series Metallic line, featuring an aluminum body designed for durability in demanding industrial service. It has 1-inch NPT inlet and outlet ports, a 1/4-inch NPT air inlet, and a single-port configuration that facilitates straightforward integration into transfer lines. The diaphragm is Hytrel, with polypropylene/Hytrel ball and seat materials, and the unit is built for reliable operation with a light-to-moderate fluid load. Rated up to 120 PSI, it can move water at about 22 GPM, with a maximum discharge flow specification around 35 GPM and air displacement up to 38 CFM, while the maximum head is listed near 270 feet. An unbalanced air valve design helps prevent stall during startup and under load, contributing to smoother, steadier performance. This combination of aluminum construction, Hytrel diaphragm, and 1" NPT ports supports general industrial fluid transfer tasks in manufacturing and maintenance environments where a compact air-operated diaphragm pump is appropriate.