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Aquatrac Dosing Unit

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Feedwater dosing unit
Collective Auction


Cooling Water Treatment

Without effective water treatment, a cooling water system can suffer from scale formation, corrosion and fouling and may become a breeding ground for harmful bacteria such as those which cause Legionnaires' Disease. This reduces efficiency, shortens plant life and makes your operation unreliable and unsafe.

Poor control can not only put your cooling process at risk, but can also squander £1,000s in wasted energy, chemicals and water charges.

Cooling Water Treatment Basics

The purpose of a cooling water treatment programme is essentially 3 fold: to protect the system against damaging corrosion; to control scale formation and fouling which will impair cooling efficiency; and to control the growth of harmful microbes like legionella bacteria.

These problems are interrelated and it is therefore essential that the treatment programme tackles all of them.

Concentration Factor & Bleed-off Control

An evaporative cooling system works by transferring heat from the process being cooled to the recirculating cooling water at a heat exchanger and then rejecting that heat at the cooling tower by evaporating a small proportion of the water. Evaporating just 1.8% of the recirculating flow achieves a temperature reduction of 100C. Since water is evaporated as pure H2O the dissolved minerals (TDS) in the remaining cooling water become more concentrated.

Some increase in the concentration factor is often beneficial since it tends to makes the cooling water less corrosive but if this is allowed to go unchecked it can lead to scale formation and fouling. It is therefore often necessary to control the concentration factor by bleeding-off or blowing down a proportion of the cooling water and replacing it with less concentrated make-up water. This is best done using a conductivity controlled bleed-off system which automatically controls the concentration factor at the desired conductivity.

An effective cooling tower dosing system to control your cooling water chemical treatment programme is essential if problems with corrosion, scale formation and Legionnaires’ Disease are to be avoided.

Aquatrac's MultiFLEX water treatment controllers exemplify the latest in water management technology.

Packed with features, the MultiFLEX line of products are designed to provide the highest degree of control and flexibility.

With one MultiFLEX you can control and monitor multiple towers, multiple boilers, or tower/boiler combos.

pdf icon Print / Download Aquatrac Dosing Unit Datasheet