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AODD Pumps


What is a AODD Pump?

An Air-Operated Double-Diaphragm (AODD) pump is a type of positive displacement pump characterized by its two flexible membranes and versatility in pumping a wide range of fluids. Operated by compressed air, these pumps employ an air distribution system that alternates pressure between the two diaphragms. This action causes one diaphragm to draw fluid in through the inlet valve while the other diaphragm pushes fluid out through the discharge valve, ensuring continuous fluid flow.

The operation of AODD pumps is remarkably efficient due to the presence of only stationary seals, reducing the likelihood of leaks and allowing the pumps to run dry without damage. This feature, coupled with their self-priming capability, makes AODD pumps highly reliable for various industrial applications. Whether you’re transferring abrasive fluids, dealing with chemical processing, or need precise dosing, an AODD pump can handle the task with ease.

The design of AODD pumps allows for easy maintenance, contributing to a lower total cost of ownership. The absence of electricity in their operation also makes them inherently safe for use in explosive environments, a consideration for many industries. With their ability to maintain constant flow rates and adapt to differential pressure between the air supply and pumped fluid, AODD pumps offer a versatile and efficient solution for managing fluid movement in a multitude of settings.

Product Working

How does an Air Operated Double Diaphragm Pump Work?

AODD pumps, or Air-Operated Double-Diaphragm pumps, utilize a simple yet highly effective mechanism driven by compressed air to move fluids. Within the pump, two diaphragms are connected by a shaft, each positioned within its own chamber that features inlet and outlet valves, usually in the form of ball valves. These components play a pivotal role in directing fluid flow through the pump.

The process begins as compressed air from an external source enters the pump’s air distribution system. This system channels the air to one diaphragm, causing it to extend and generate a vacuum in its chamber. This vacuum action opens the inlet valve, drawing fluid into the chamber. Concurrently, the extension of this diaphragm forces the fluid out of the opposite chamber by compressing its diaphragm, pushing the fluid through the outlet valve.

Once the air distribution system switches the air flow to the opposite diaphragm, the cycle reverses, ensuring a continuous and synchronized pumping action. This dual-action, characterized by one diaphragm filling as the other empties, allows the pump to maintain a steady flow of fluid. AODD pumps are adept at handling a wide array of fluids, from thin and watery to highly viscous or abrasive, effectively minimizing the risk of damage to the pump.

Key to their efficiency and reliability are the pump’s stationary seals, which drastically reduce leakage risks and enable the pump to run dry without damage. The ability of AODD pumps to self-prime and regulate fluid flow and pumping speed by adjusting the air supply pressure further enhances their versatility, making them a robust solution for diverse industrial applications. Check out this video to learn more!

AODD Pump Series

The History of AODD Pumps

The Air-Operated Double-Diaphragm (AODD) pump story began in 1955 with Jim Wilden’s innovation in a California walnut grove. Addressing a flooded steel factory’s need, Wilden invented the AODD pump to efficiently handle water, slurry, and other substances. This marked the start of Wilden Pump & Engineering Company, pioneering in pump technology.

Throughout the 1960s, Wilden improved manufacturing processes, significantly reducing production times and laying the groundwork for future AODD models. The company expanded, moving into a larger facility to accommodate growth.

The 1970s tested Wilden with economic challenges, yet the company maintained its workforce and expanded product lines as the economy recovered, emphasizing employee welfare and innovation.

The 1980s and 1990s witnessed Wilden’s global expansion and the introduction of new air distribution systems, securing its leadership in the AODD pump market. Despite Jim Wilden’s passing in 1989, the company continued to innovate, focusing on energy efficiency and global market needs.

Entering the new millennium, Wilden embraced energy-efficient solutions and maintained its commitment to high performance and customer satisfaction. The introduction of the Pro-Flo® SHIFT ADS exemplifies Wilden’s ongoing dedication to innovation and excellence in pump technology. Wilden remains a trusted name in the AODD pump industry, known for its quality, reliability, and innovative spirit.

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Why Choose Advanced Pump?

Advanced Pump Company is your regional pump, motor and air compressor expert serving the Northeast USA. For over 30 years, we have worked closely with all major pump and motor manufacturers to supply our industrial, commercial, and municipal customers with quality name-brand pumps, motors, compressors, and engineered systems.