The Yamada NDP-25BPS-PP is a versatile air operated diaphragm pump engineered for exceptional flex life and reliable chemical resistance when moving mild acids, caustics, and water-based industrial slurries. Combining a lightweight, corrosion-resistant polypropylene fluid body with durable Santoprene (TPO) diaphragms, check balls, and o-rings, this 1-inch NPT AODD unit delivers smooth, high-efficiency flow rates up to 46.2 GPM (174.8 L/min) at operating pressures up to 100 PSI. Driven by Yamada’s patented non-lubricated C-spool air valve design, this Yamada AODD pump offers stall-free, freeze-resistant performance without requiring continuous external air lubrication. Its leak-resistant bolted casing, threaded 1-inch NPT connections, and externally accessible air motor ensure quick online servicing, providing a cost-effective fluid handling solution for chemical processing, water treatment,