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For my microbrewery system, what type of glycol is most recommended for my chiller?

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6 answers

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We recommend USP propylene food-grade glycol with inhibitors to prevent corrosion.
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Propylene glycol is an antifreeze.  The glycol you use should be one that is recommended for use in food applications.  The major standards in the industry are set by the United States Pharmacopeia, so any propylene glycol with an USP grade should be appropriate.
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USP Food Grade Propylene Glycol mixed with whatever percentage of water depending on size.
You can use inhibitors for protection against corrosion.
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Use USP propylene glycol mixed with water in the correct percentages for your brewery. Check with your glycol provider for recommended percentages. 

For most chiller systems, use 15F degrees colder than the coldest glycol temperature for which you will operate or the lowest possible outdoor, winter ambient temperature for your area, whichever is lower.
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We only sell a USP food grade inhibited propylene glycol concentrate which is your best value.  Not all glycol's are created equal. The volume required by each manufacturer is dependent on the manufacturer's dilution rate of water. You can buy a premix but you are mostly paying for water and the higher cost of shipping. Water/Glycol. A concentrate is your cheapest insurance against freezing. Freezing will rupture your braze plate heat exchanger's which will than cause water to mix with your refrigerant and you will say goodbye to your chiller.  
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USP grade propylene glycol is a food grade glycol used in brewing and dispensing industry
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