What is an AODD pump and how does it work?

An AODD (Air Operated Double Diaphragm) pump uses compressed air to alternately flex two flexible diaphragms, drawing fluid in and pushing it out through one-way ball or flap valves. Sealless design, self-priming, dry-run safe, and explosion-proof — ideal for chemicals, slurries, and viscous fluids.

What is the difference between metallic and non-metallic AODD pumps?

Metallic AODD pumps (Aluminum, Stainless Steel, Cast Iron) handle high pressures, hot fluids, and abrasive media. Non-metallic AODD pumps (Polypropylene, PVDF, Acetal) handle aggressive chemicals like acids, alkalis, and ultra-pure fluids where metal contamination is unacceptable. Choose based on chemistry, temperature and pressure.

What is the maximum flow rate of Sandpiper AODD pumps?

Sandpiper AODD pumps deliver flow rates up to 285 GPM (1080 LPM) in the largest 3-inch metallic models. Non-metallic variants typically deliver up to 220 GPM. Pump sizes start from 1/4 inch (6 GPM) for chemical dosing applications, scaling up through 1/2, 1, 1.5, 2 and 3 inch models.

Are AODD pumps self-priming?

Yes — AODD pumps are inherently self-priming and can lift fluids from depths up to 5-8 metres. They handle dry-run conditions without damage, making them ideal for tank emptying, drum unloading, and intermittent service. No external priming pump or vacuum system needed.

What is the difference between AODD and EODD pumps?

AODD pumps run on compressed air; EODD (Electric Operated Double Diaphragm) pumps run on electric motors. EODD pumps deliver up to 75% energy savings versus AODD for the same flow because compressed air has only 10-15% energy efficiency, whereas electric motors operate at 85-90% efficiency. EODD also runs quieter.

AODD Pumps | Sandpiper Air Operated Double Diaphragm Pumps

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