ATO is a trusted, U.S.-registered supplier specializing in high-performance industrial automation and control systems. Built around the core mission of helping global customers optimize their equipment procurement budgets, ATO enables businesses to bypass local dealer markups and purchase top-tier industrial hardware directly from experienced Chinese manufacturers. To ensure every system runs seamlessly, ATO provides complete pre-sales and after-sales support—giving you free direct access to professional application engineers for expert advice on product selection, wiring diagrams, and system commissioning.

Among our core fluid handling technologies, ATO offers a comprehensive catalog of Air Operated Double Diaphragm Pumps (AODD Pumps) designed to handle demanding, harsh, and hazardous pumping environments. Powered entirely by compressed air, our pneumatic diaphragm pump lineup covers fluid inlet and outlet port sizes ranging from 3/8", 1/2", 3/4", 1", 1-1/2", 2", 4", up to 5" (DN125 flange). These pumps provide versatile flow rates starting from 5 GPM for low-volume precision metering up to 275 GPM for heavy-duty industrial fluid transfer, with maximum working pressures reaching 100 to 120 PSI. To match diverse chemical compatibility requirements, ATO AODD pumps are available in cast steel, aluminum alloy, non-metallic, and corrosion-resistant stainless steel body materials.

Engineered with positive displacement technology and internal ball valves, ATO air-driven diaphragm pumps offer exceptional operational benefits over traditional electric pumps. Because they run on compressed air rather than electricity, they generate no electrical sparks, making them intrinsically safe for explosive atmospheres and flammable liquid transfers. The expansion of exhaust air during operation prevents thermal buildup, ensuring the pump runs cool without overheating risks. Furthermore, with self-priming capabilities, submersible operation support, and a seal-less design that eliminates dynamic seals, these pumps prevent costly seal leaks and maintain peak efficiency even after extended wear.

The versatility of ATO pneumatic double diaphragm pumps makes them an ideal choice across a wide spectrum of industries. They excel at conveying shear-sensitive, high-viscosity, and abrasive fluids—including lime slurry, sewage, crude oil, grease, paint, and soft sediment—without agitating or damaging the media. Whether deployed in water treatment plants utilizing BioFloc technology, chemical processing facilities handling aggressive acids and solvents, food and beverage processing, or laboratory testing setups, ATO AODD pumps deliver reliable, low-maintenance performance. Thanks to their 100% energy utilization feature, the pump automatically stops when the discharge line is closed, preventing pressure buildup and saving operational energy.

Whether you need a compact 3/8" AODD pump for localized chemical dosing or a heavy-duty 5" 275 GPM pump for volume transfer, ATO offers factory-direct pricing, robust build quality, and unmatched engineering assistance.