Biocide performance depends on reaching a concentration for long enough, and on not letting the population adapt. Both are control problems, not chemistry problems.
The Operating Reality
Open cooling circuits, towers and warm return lines dose oxidising and non-oxidising biocide on a rotating programme, with ORP confirming the oxidation dose landed.
Why It Matters
Biofilm shields organisms and insulates heat transfer. Under-dosing selects for survivors; running one mode continuously builds resistance. Manual programmes slip because the timing is inconvenient.
How It Works in Practice
- Scheduled, mode-alternating feed with ORP feedback confirms the oxidation dose landed.
- Dose is delivered at ±0.5% metering accuracy, avoiding the under-dose that drives resistance.
- Leak alarm within 2 seconds and dry-running protection suit biocide rooms with concentrated product.
Selection Checklist
- Choose the control signal (pH, ORP, conductivity or flow-proportional) before sizing equipment.
- Size the metering pump to the working dose with margin, not to peak demand.
- Confirm wetted-part compatibility for every chemical to be fed.
- Require leak detection, dry-running protection and containment in the installation.
- Plan integration with PLC, DCS or remote telemetry from the start.
Related Products
- Automatic Chemical Dosing System
- Automatic Condenser Tube Cleaning System (ATCS)
- Constant Pressure Water Make-up System
FAQ
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