Glycol, or anti-freeze, needs to be added to water in closed circuit cooling systems, ie air blast coolers or free cooling systems, when exposed to ambient temperatures below freezing.Glycol, or anti-freeze, needs to be added to water in closed circuit cooling systems.
To prevent the shell and tube or plate type evaporators in chillers from freezing, it is necessary to introduce a percentage of anti-freeze to the water, below a set point water leaving temperature of 4ºC.
If the chiller is sited outside, operating at set point temperatures above 4ºC, but exposed to ambient temperatures below freezing and unprotected by trace heating, it will require the addition of an antifreeze solution.
Please refer to our technical support desk for advice on percentages required for your particular need.
Two types of anti freeze are available:
- Industrial Grade (IG), and
- Food Grade (FG)
Both developed specifically for use with chillers and both with effective, compatible, corrosion inhibitors, to protect all metals commonly found in modern chillers and cooling systems systems.
Anti-freeze added in the correct percentages will guard against freezing, will maintain high thermal efficiencies and guard against corrosion