EGW Wordle

Many customers ask us what concentration of ethylene glycol we recommend they use in their chillers, cooling systems, and/or liquid cooling loops. It depends quite a bit on your thermal and mechanical requirements, such as required thermal performance, how often you replace your fluids, if you are concerned about corrosion, etc. For most applications, however, we recommend using a solution consisting of 30% ethylene glycol and 70% water (EGW). Water has the best thermal performance, while the inhibited glycol provides freezing point suppression and corrosion protection.

When higher concentrations of glycol are used, it can cause problems within your cooling loop. Over time, the concentration of glycol will increase due to evaporation of water from the system. When the glycol concentration is too high, glycol will collect in pump seals forcing them apart and creating a leak path.

What concentration of glycol are you using? Have you experienced any problems in the past because of your glycol concentration? Please share your experiences.