Posted by Bob on July 15, 2014 at 12:42:18 from (64.255.159.192):
In Reply to: Anti-freeze posted by prawn farmer on July 15, 2014 at 12:17:28:
My GUESS is that those machines are used around grain and other food product handling facilities and that propylene glycol is much LESS toxic then ethylene glycol (in case of a leak or a spill.
I looked a bit around the "net and it propylene glycol is a bit LESS efficient at carrying away heat, and there seems to be debate both ways on which products is less corrosive to aluminum and other metals as it ages and breaks down, so it doesn"t seem like it would be used for either of those reasons.
It will be interesting to see what other folks have to say on this one!
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