Cooling Water Treatment

Guardian Chemicals open recirculating cooling water treatment programs are designed to promote water conservation by maximizing cycles of concentration to ensure efficient and cost effective operation while minimizing maintenance and chemical costs.

AQUAGUARD 502 contains a complex blend of polymers, dispersants, phosphonates, corrosion inhibitors and alkalinity control agents. This blend helps prevent the corrosion of steel, galvanized metals, yellow metals such as copper or brass and their alloys while also effectively controlling scale by dispersing any suspended solids and preventing deposition. All of this is achieved at low dosages.

In addition, your Guardian Chemicals Representative can help you address any microbial issues with our AQUAGUARD 600 series of products.


  • Economical cost effective dilutions
  • Highly effective scale inhibition package designed for even the toughest water conditions
  • Corrosion inhibitors for both ferrous and non-ferrous system components
  • Dispersants designed to improve heat transfer in condensers and related heat exchange equipment by minimizing scale buildup
  • Reduces fresh water makeup requirements, conserving water and reducing operating costs
  • Ideal for open recirculating cooling systems


AQUAGUARD 502 is specifically formulated to handle the chemical requirements of smaller open recirculating cooling systems.

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