The Yamada NDP-800BSS is a heavy-duty, ultra-high-capacity 3-inch air-operated double diaphragm pump engineered for high-volume fluid transfer and long-lasting mechanical endurance. Equipped with female 3-inch ANSI Flange connections, it integrates seamlessly into heavy-duty threaded piping systems for high-flow, leak-free operation. Constructed with a cast 316 stainless steel housing paired with durable Santoprene (TPO) diaphragms, this unit delivers exceptional flex life, high abrasion resistance, and excellent chemical compatibility with acids, bases, and water-based process fluids. Driven by Yamada’s patented, oil-free C-Spool air-valve technology with an external reset button, the NDP-800BSS guarantees reliable, stall-free operation without requiring air motor lubrication. Delivering maximum flow rates exceeding 300 GPM while handling suspended solids up to 13/32” (10 mm), this seal-less liquid handling solution is ideally suited for chemical processing, industrial wastewater treatment, acidic slurry handling, and high-demand fluid circulation.