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 described was straightforward enough on the surface: one of their AODD pumps had been consuming spare parts every four to six months, and they had tried switching between several different brands over the years without any improvement in reliability.
The first thing we noted internally was that the brands they had tried are reputable, well-established names — not cheap off-brand units. And if an AODD pump from a quality brand is failing every few months, repeatedly, across multiple brands, then the pump is almost certainly not the problem. When we assess these situations, we try to do it without bias, even when that means acknowledging that a competitor’s product is not at fault. It’s the only way to actually arrive at a useful answer.
We asked if we could visit the site and have a look at the installation.
What We Found
The chemical being transferred was thickener — a fluid with high viscosity that places considerably more mechanical load on the pump’s wetted components compared to a water-like fluid. Viscosity affects how hard the pump has to work on every single stroke, particularly during the suction phase when the diaphragm has to pull a thick, resistant fluid into the chamber.
Beyond the fluid itself, the discharge pipe run was long and had a number of bends along the way. This matters because of something fundamental about how AODD pumps work: they do not produce a steady, continuous flow the way a centrifugal pump does. Every stroke pushes a slug of fluid through the outlet, and every one of those slugs generates a pressure wave that travels down the discharge line. In a short, relatively straight pipe, that wave dissipates quickly and isn’t much of an issue. In a long pipe with multiple changes in direction, the pressure waves from each stroke accumulate and reflect back, and the pump ends up working against a compounding, fluctuating back-pressure load on every cycle. This pulsating nature of AODD flow is also precisely why the connection to the pump must never be rigid — the mechanical impulses have to go somewhere, and if the piping gives them nowhere to go, they go into the pump itself.
Taken individually, each of these factors — a viscous fluid, a long discharge run, a winding pipe layout — is manageable. Taken together, on top of the inherently pulsating output of an AODD pump, they create a genuinely difficult operating environment. The pump was not failing because it was a bad pump. It was failing because the cumulative strain on the system was too high, and no pump — regardless of brand — was going to last long under those conditions without something in the system changing.
The Solution
Once the root cause was clear, the solution was relatively straightforward: we recommended the installation of a pulsation dampener on the discharge side of the pump.
A pulsation dampener is a vessel with an internal bladder or membrane — one side is in contact with the process fluid, the other side is pre-charged with compressed air to a set pressure. When each pump stroke pushes a slug of fluid into the dampener, the bladder compresses and absorbs the pressure spike. During the interval between strokes, the bladder releases that stored energy back into the flow, smoothing out the pulses into something closer to a steady stream. The effect downstream is a significantly more even pressure profile, which reduces both the fluctuating back-pressure load on the pump and the mechanical fatigue on the discharge pipework.
In this installation, that was the change that made the difference. Not a different brand of pump, not a larger pump, not a rebuild — just the addition of one component that addressed the actual problem, which was pulsation interacting with a long, winding discharge line and a viscous fluid.
The Outcome
The pulsation dampener was installed in 2017. We check in with Top Glove every year as part of following up on our installations, and every year the answer has been the same: the pump is still running, and not a single spare part has been replaced since the dampener was added. That is nine years as of June 2026 — compared to a previous cycle of failure every two to three months.
What This Illustrates
The instinct when a pump keeps failing is to find a better pump. And it is a reasonable instinct — but it is also the instinct that keeps leading people to the same outcome when the pump is not actually what is broken. What solved this case was not a pump selection. It was taking the time to understand the whole system: the fluid properties, the discharge conditions, the pipe routing, and how all of those interact with the fundamental operating characteristics of an AODD pump.
The other thing worth noting is that this kind of diagnosis requires a willingness to look at the situation fairly — including being honest when the previous brands the customer used were not at fault. That is a harder conversation to have than simply offering a replacement, but it is the conversation that leads to an actual fix rather than a temporary one.
If you have an AODD pump installation in Malaysia that has been giving you reliability issues and you want a second opinion on the system setup, feel free to reach out to us at info@autoflotechnology.com.