AODD Pump Diaphragm Maintenance Intervals: The 100K / 1M / 20M Cycle Schedule
Most people don’t think about diaphragm maintenance until the pump leaks. By that point, the diaphragm has failed and chemical is either in the air circuit or on the floor. The Fluimac Phoenix manual defines a three-stage maintenance schedule tied to cycle count, not calendar time — and the logic is worth understanding, because cycle […]
Static Electricity and AODD Pumps: Grounding Requirements and the Real Explosion Risk
An AODD pump moving flammable solvent through a non-conductive plastic casing generates static charge. The fluid moves at velocity, contacts non-conductive surfaces, and charge accumulates — on the fluid, on the pump body, on the connected hose. If the pump isn’t grounded, that charge has nowhere to dissipate. It builds until it discharges. In the […]
Why Rigid Pipe Connections Destroy AODD Pumps
AODD pumps generate pulsating flow. Every stroke pushes a slug of fluid through the outlet — not a smooth stream. If you hard-pipe straight into the pump manifold with rigid metal or rigid plastic connections, those pulse forces have nowhere to go. They transfer directly into the pump body, the manifold flanges, and the pipe […]
ATEX Zone 1 vs Zone 2 for AODD Pumps: What the Codes on the Label Actually Mean
Specifying a pump for an explosive atmosphere without understanding what the ATEX marking actually says is a compliance risk and a safety risk. The label on a Fluimac Phoenix carries a full ATEX and IECEx code, and every element of that code has a specific meaning that determines where the pump can legally and safely […]
How to Read a Fluimac Phoenix AODD Pump Model Code
A Fluimac Phoenix AODD Pump model code looks like a random string of letters and numbers at first glance. It isn’t. Every character specifies something — pump series, size, casing material, diaphragm material, ball material, seat material, o-ring material, connection type, and ATEX zone. If you’re ordering a replacement, requesting a quote, or trying to […]
AODD Pump Viscosity Limits: Negative Suction vs Below-Head Suction and What the Numbers Actually Mean
AODD pumps handle viscous fluids that centrifugal pumps can’t touch — but they’re not without limits. The Fluimac Phoenix technical specifications draw a clear distinction between two installation types, each with its own viscosity ceiling. Get this wrong at the selection stage and you’ll spend months dealing with slow cycles, diaphragm wear, and suction-side starvation […]
Solid Particle Size Limits in AODD Pumps: What You Can Actually Pump and at What Model Size
One of the reasons engineers specify AODD pumps for slurry and suspension duties is the ability to pass solid particles that would immediately block a centrifugal pump or damage a gear pump. But that capability has hard limits that vary by model size — and using a pump outside those limits doesn’t just reduce performance, […]
Air Quality Requirements for AODD Pumps: Why Lubricated and Wet Air Will Destroy Your Pump
Most AODD pump failures traced back to the air supply get blamed on low pressure. Pressure is easy to measure, so that’s where people look first. What actually damages the pneumatic circuit in most cases isn’t pressure — it’s air quality. Lubricated air, wet air, and contaminated air all destroy internal components that are designed […]
Why Snap-On Air Fittings Cause 90% of AODD Pump Stalls
Your AODD pump stalls. You check the air pressure — it reads fine at the regulator. You check the diaphragms — intact. You check the pneumatic exchanger — no obvious fault. The pump restarts when you disconnect and reconnect the air supply, then stalls again an hour later. The problem is almost certainly the snap-on […]
The Pneumatic Exchanger in an AODD Pump: What It Does and Why It Fails
When an AODD pump stalls for no obvious reason, most people check the air pressure first, then the diaphragms. The component that actually caused the problem — the pneumatic exchanger — gets checked last, if at all. That’s backwards. The pneumatic exchanger is the brain of the pump, and it fails more often than people […]