Why the “Best” Diaphragm Material Failed at Daihatsu Perodua — And What Replaced It
Daihatsu Perodua Engine Manufacturing was already a customer of ours — we had been supplying them Dosatron units for mixing their metalcutting fluid — so when I visited one day and asked, as I usually do, whether they also use AODD pumps, the conversation went somewhere interesting. Yes, they said. And they asked if we […]
Nine Years Without a Spare Part: An AODD Pump Case Study at Top Glove
We have been supplying Dosatron units to Top Glove for a long time — for the dilution of nitric acid and alkaline in their former washing and dipping lines — so when they came to us asking whether we also carry AODD pumps, we already had some sense of how their facility operates. What they […]
Why AODD Pump Diaphragms Fail: A Guide to Mechanical Stress & Strain Damage
If you operate Air-Operated Double Diaphragm (AODD) pumps, you already know that the diaphragm is the heart of the pump. It is the component that does all the work — flexing thousands of times per hour, pushing fluid through your system, and taking the full brunt of every pressure cycle. When it fails, everything stops. […]
Pumping Sulphuric Acid 98% with an AODD Pump: Challenges and How to Avoid Frequent Diaphragm Failure
Sulphuric acid at 98% concentration is one of the most demanding fluids you will ever ask an AODD pump to handle. It is not just corrosive — it is dense, with a specific gravity of 1.84, nearly double that of water. It generates heat on contact with moisture. And it will destroy the wrong pump […]
The Impact of Specific Gravity on AODD Pump Selection and Operation
When engineers and operators select an AODD pump for an application, the conversation almost always starts with flow rate, pressure, and chemical compatibility. Specific gravity, if it is considered at all, is often treated as an afterthought. This is a mistake that leads to undersized pumps, premature diaphragm failures, check valve problems, and frustrated customers […]
3 Mistakes That Cause Premature AODD Pump Failure — And How to Avoid Them
The AODD pump is one of the most commonly used chemical transfer pumps in Malaysian industry. Walk into any factory that handles chemicals in significant quantities — gloves, oleochemical, water treatment, pharmaceutical — and you will find them running. Considering how critical they are to operations, it is worth understanding why they fail prematurely. In […]
High Inlet Pressure: One of the Most Misunderstood Causes of AODD Pump Diaphragm Failure
When an AODD pump diaphragm fails prematurely, most operators look at the usual suspects first. Wrong chemical compatibility. Dry running. Worn out from age. But one of the most common and most destructive causes of diaphragm failure is one that many operators never even consider: high inlet pressure from the suction side. This is particularly […]
PVDF AODD Pump: When Is It the Right Choice of Material?
More often than not, when I visit factories in Malaysia that are handling aggressive chemicals, I find them using polypropylene (PP) AODD pumps for fluids that require PVDF. The reason is always the same: PP is cheaper. It is understandable. But cheap is not always cheaper. A PP pump running with Nitric Acid 68% or […]
Why Engineers in Chemical Processing Keep Choosing AODD Pumps Over Centrifugal
Walk into any chemical plant, glove factory, or water treatment facility in Malaysia and you will find AODD pumps running. Not because they are the cheapest option. Not because they are the simplest. But because for a specific set of conditions — and those conditions are extremely common in chemical handling — they outperform the […]
5 Factors That Determine Which AODD Pump Is Right for Your Application
Most AODD pump problems — premature diaphragm failure, poor flow rate, excessive air consumption, early seal wear — can be traced back to the selection stage. The wrong pump going into an application is a problem that no amount of maintenance will fix. Here are the five factors that must be considered before specifying an […]