The Balcrank CenterFlo CF65 air-operated double-diaphragm pump features a patented reversed air/fluid design compared to conventional diaphragm pumps. The fluid path flows through the center of the pump with the air motor to the outside, allowing improved suction and performance. The CF65 is designed for use in commercial heavy duty trucks and fleets as well as other applications. CenterFlo pumps are now available in sizes from 10 gal/min to 65 gal/min in poly, aluminum and mixing models.