Glycol Dosing

Is your chilled water system ready for another deep freeze?

Chiller systems without trace heating coils require anti-freeze dosing.  Now is the time to have your system analysed to make sure you can protect against the extremes in temperature we experienced last year.

How much glycol should be in a chilled system?
For external systems we would recommend a minimum of 20-25% glycol and this normally gives adequate frost protection for the UK (-9° to -13°C).

If the system has trace heating does it still need glycol?
No, the trace heating (which is electrical current passed through wires along the lagging) will prevent freezing so no glycol is needed.

Which glycol do I choose?
The most common choice is Monoethylene Glycol but the occasional system has propylene glycol.  In addition an inhibitor should be used to give corrosion protection.

We also offer DOWCAL products which are an ‘all-in-one’ glycol and inhibitor.  This can be useful to dose if you have a large system and have no inhibitor or glycol – you can then top the system up yourself with only one chemical on site.

What do we charge for glycol?
The price can vary due to supply and demand (and weather conditions) as it is a commodity chemical.

Please contact us to arrange a no-obligation analysis and quotation.