Closed Recirculating System Water Treatment

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Closed Recirculating System Water Treatment


Hot and chilled water loops, used for heating, refrigeration, and/or air conditioning, are typical of closed recirculating systems.  Cooling water, for example, is pumped through heat exchange equipment and warmed, then recirculated in a closed-loop to a cooling heat exchange system before returning to pick up more process heat.


While there are usually minimal make-up water requirements and exposure to the atmosphere, closed systems can experience corrosion, microbiological growth and metal oxide deposition.  If not addressed, these issues can have a negative impact on heat transfer efficiency, utility usage, process reliability and maintenance, system integrity and total cost of ownership.


Our solutions address the key issues of corrosion, microbiological growth and deposition to protect system integrity.


System Corrosion


Equipment corrosion can result in leakage, an increase in repair maintenance, a reduction in plant life and by-product deposit build-up. Corrosion inhibitors protect closed system integrity and help deliver a return on asset investment.


Microbiological Growth


Microorganisms can deplete corrosion inhibitor levels and cause biofouling.  Reduced protection and the growth of sulphate reducing bacteria increase the risk of excessive corrosion. Our team can advise the most suitable biocides to help control microbiological growth and biofouling in your system.


Deposit Build-Up

Accumulation of metal oxide deposits can damage pumps, restrict flow and reduce heat exchange efficiency.  Corrosion inhibitors, biocides and suspending agents prevent build-up of corrosion by-products for maximum operational efficiency with minimal maintenance.


Please contact your Diversey representative to confirm local product range and availability.