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    Freeze Protection & DOWFROST™

     
    Daniel Cohen 
    Sr. Market Developer - Dow Glycol Heat Transfer Fluids
Winter weather can be beautiful – but it can also be incredibly powerful and the intense cold can damage fluid-based systems.  In the case of water-glycol systems, winter weather can slow down or entirely freeze up processes.  Learn how to avoid frozen or burst systems with DOWFROST™ Inhibited Propylene Glycol.

What is Freeze Protection? How do I keep my system safe? 


The basic definition of freeze protection is pretty self-explanatory – the ability to keep a fluid flowing and resist ice crystal formation.  In regard to thermal systems, antifreeze protection is necessary for applications where the fluid must be pumped at the lowest anticipated temperature.  This is especially true for systems that cannot withstand any ice crystal formation or lack the expansion space required for a slush/liquid mixture.
 
In order to provide adequate freeze protection for any heat transfer system, the propylene glycol and water solution must maintain a freezing point at least 5°F (3°C) below the lowest expected ambient temperature.  A chart is listed below for recommended glycol concentrations for DOWFROST™ and DOWFROST™ HD.
 
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What is Burst Protection – How does it differ from Freeze Protection?


Burst protection accounts for temperatures that fall well below the lowest anticipated ambient temperature freezing and ice crystals begin to form.  Fluids remain flow-able as a slush-liquid mixture and systems are protected as long as expansion volume is accommodated.    
 
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