Products
aro-logo-desktop.png

What Does AOD Pump Stand For?

Understanding the Benefits of Air Operated Diaphragm Pumps in Industry

What Does AODD Mean?

"AODD" stands for "Air Operated Double Diaphragm." ARO's air operated diaphragm pumps are known for their reliability and versatility. These pumps are a type of positive displacement pump, capable of handling a wide range of fluids, including abrasive, viscous, and corrosive materials.

 

What Is the Principle of an Air Operated Double Diaphragm Pump?

An  air operated double diaphragm pump (AODD pump) operates through the reciprocating action of flexible diaphragms and check valves. Compressed air enters the air chamber on one side of the diaphragm, causing a discharge stroke. This movement expels the fluid through the pump's outlet.

Simultaneously, the diaphragm on the opposite side creates suction, pulling liquid into the pump. A common shaft links the diaphragms, ensuring they move in sync. The air valve alternates air pressure to each side of the diaphragm, enabling continuous operation.

ARO’s pumps are engineered for reliable fluid transfer. Their design avoids complex parts, ensuring minimal maintenance. The robust air distribution system keeps air consumption efficient, and the pumps are safe to use in explosive or hazardous environments. Additionally, they are a cost effective solution for many industries requiring dependable performance. Learn more about  How Air Operated Diaphragm Pump Work?

aodd-blog-1

How to Operate an AODD Pump?

  1. Installation: Ensure secure connections and check for leaks.
  2. Air Supply: Attach the air source and adjust pressure with a regulator.
  3. Starting: Open the air supply valve to begin operation. The pump moves the diaphragms to transfer fluid.
  4. Monitoring: Observe for consistent performance or irregularities during use.

ARO’s AODD pumps simplify fluid transfer, making them ideal for industries needing dependable and efficient solutions.

Can an AODD Pump Run Dry?

One of the key benefits of ARO's AODD pumps is their ability to run dry without damage. The pump design separates air and liquid, so the pump does not rely on fluid for cooling or lubrication.

This capability ensures smooth operation even when fluid levels fluctuate. ARO's pumps are built with durable materials, enabling them to handle tough conditions. While they can run dry temporarily, prolonged dry operation should be avoided to prevent wear.

Key Features of ARO AODD Pumps:

  1. Seal-less Design: Prevents leaks and contamination.
  2. Self-priming: Moves fluids with high viscosity or solids without manual priming.
  3. Variable Flow Rate: Adjustable air pressure allows control over the flow.
  4. Dry-running Capability: Operates safely without fluid.
  5. Hazardous areas: Most ARO diaphragm pumps are ATEX certified (CE Ex11 2GD X).
aodd-blog-2

What Are the Disadvantages of AODD Pumps?

AODD pumps have some limitations:

  • Energy Efficiency: Compressed air increases operating costs due to higher air consumption.
  • Flow Rate: Lower flow rates than centrifugal pumps limit rapid fluid transfer.
  • Pulsation: Discharge stroke creates pulsating flow; dampeners add cost.
  • Noise: Noisier than other pumps, unsuitable for quiet environments.
  • Freezing: Air exhaust may freeze in humid conditions, needing maintenance.

How Do Positive Displacement Pumps Work?

Positive displacement pumps move fluids by trapping a fixed amount of liquid and forcing it through the outlet. AODD pumps use flexible diaphragms and check valves to achieve this. The diaphragms compress and expand, controlling the flow of fluid during each discharge stroke.

What Is the Maximum Discharge Pressure of an AODD Pump?

ARO’s air operated double diaphragm pumps provide flexible pressure capabilities. Most models deliver up to 120 psi (8.3 bar), sufficient for diverse applications like transporting fluids over long distances or through filtration systems.

Additional Features of ARO AODD Pumps:

  • Unbalanced Air Valve: Ensures stall-free performance, even at low pressures.
  • Quick Dump Valves: Prevent freezing by releasing cold air effectively.
  • Bolted Construction: Offers leak-free performance for handling hazardous fluids.