The Micro Matic 60703-55 is a 55-gallon drum of USP-grade propylene glycol, the food-safe coolant used to fill the glycol loops in commercial draft beer cooling systems. Polar Flo is Micro Matic's spec'd product for their draft cooling equipment and the right call for any system where food-grade coolant is required (which is most draft installations, where coolant routes are in proximity to product lines).

Why USP Grade

USP (United States Pharmacopeia) grade propylene glycol meets purity standards established for pharmaceutical and food applications. The alternative, industrial-grade propylene glycol, is cheaper but contains impurities that are unacceptable for food-contact-adjacent applications. For commercial draft systems where glycol lines are bundled with beer trunk lines, USP grade is the correct call from a food-safety, insurance, and code-compliance perspective.

System Sizing

A typical commercial draft system holds 10-30 gallons of glycol in its cooling loops depending on trunk-line length. A 55-gallon drum covers a full system fill plus reserve for maintenance top-offs. For very large multi-zone systems, multiple drums may be required.

Use Notes

Typical glycol dilution for draft beer cooling is 30-40% glycol to 60-70% water, with the exact ratio depending on the lowest expected ambient temperature in the cooling loop's environment. Higher glycol percentage = lower freeze protection but worse heat transfer. Refer to your power-pack manufacturer's specifications.