AODD pump diaphragms wear out. Every engineer who specifies them knows this. What fewer understand is that the rate at which a diaphragm wears has more to do with how...
Dosing Technologies
Auto-Dosing Unit
Compact Dosing, Built to Run Unattended
An Auto-Dosing Unit (ADU) pairs a peristaltic dosing pump with a timer, controller, or programmable circuit board inside a single, wall-mountable enclosure. The peristaltic pump moves chemical by compressing a flexible tube against a rotor — a simple mechanism with no seals or check valves in contact with the fluid, which suits viscous, corrosive, or particulate-laden liquids well. The controller decides when and how much to dose: on a repeating schedule, on a signal from host equipment, or from a live process reading.
Peristaltic dosing — a rotor compresses a flexible tube to move chemical, so no pump seals are exposed to the fluid being dosed
Timer or controller-driven — dosing follows a programmable schedule, an external signal, or a live pH/ORP/chlorine reading, depending on the application
Compact and self-contained — pump and control electronics share one IP65-rated enclosure, ready for wall mounting near the point of use
Four application types — Self-Service Laundry, Enzyme Dosing, Dishwashing, and Swimming Pool, each matched to its own dosing profile
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All Application Types
Peristaltic Pump + Controller
Self-Service Laundry ADU
Dosing units for coin-op and self-service laundromats, dispensing detergent and softener into each wash cycle on a timed or signal-triggered basis. Multi-pump controllers run several wash programmes from one unit.
Peristaltic Pump + Controller
Enzyme Dosing ADU
Timed enzyme dosing for grease traps and drain lines in commercial kitchens, breaking down FOG (fats, oils and grease) and keeping lines clear. A weekly programmable timer schedules dosing automatically, with no daily intervention required.
Peristaltic Pump + Controller
Dishwashing ADU
Dual-pump dosing units for professional dishwashers, metering detergent and rinse aid independently, each set to match wash chemistry and rinse-cycle requirements.
Peristaltic Pump + Controller
Swimming Pool ADU
Digital pH, ORP and free-chlorine dosing controllers for pool water treatment, using dosing pumps driven by live probe readings to keep pool chemistry within range automatically.
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Latest Resources
Why the Point of Chemical Injection Affects Dosing Accuracy More Than the Pump Specification
A dosing pump specified to ±1% accuracy can deliver poor process results if the injection point is wrong. The pump delivers the correct volume. The chemical does not reach the...
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...
Understanding AODD Pump Curves: Why Flow Rate Drops Before You Expect It
The pump curve looked fine on paper. At the required flow rate and the available air pressure, the pump should have delivered comfortably. Then it was installed, and flow was...
AODD Pump Ball and Seat Maintenance: When to Clean, When to Replace
The balls and seats are the check valves in an AODD pump. They control the direction of fluid flow — open on intake, closed on discharge. When they wear or...
Why Flow-Proportional Dosing Is More Accurate Than Timer-Based Dosing for Variable Flow Systems
Timer-based chemical dosing looks simple on paper: set a pump to run for a fixed period at fixed intervals, inject a known volume of chemical, move on. The problem is...