Propylene Glycol 96 4 Color Colorless Specific Gravity 15/15°C (60/60°F) 1.050-1.060 pH of Solution (50% glycol) 9.0-10.0 Reserve Alkalinity (min.) 10.0 ml Secondary heating and cooling Freeze and burst protection of pipes Various deicing, defrosting, and dehumidifying
Glycol Percentage Relative to Freeze Point Propylene Glycol www.ClenAir.com Freezing Point Propylene Glycol Solution (%) 0% 10% 20% 30% 40% 50% 60% Glycometer™ Temperature (F)° 32° 26° 18° 7° (-8°) (-29°) (-55°) Ethylene Glycol
For many heat-transfer applications it is necessary to use a heat-transfer fluid with lower freezing point than water. The most common antifreeze fluid - ethylene glycol - must not be used where there is a chance of leakage to potable water or food processing systems. In food processing systems the common heat-transfer fluid is based on propylene glycol.
PROPYLENE GLYCOL - WATER SOLUTION SPECIFIC GRAVITY, CONCENTRATION AND FREEZING POINT CHART Specific Gravity – SG 60ºF 1.000 1.008 1.017 1.026 1.034 1.041 1.046 Propylene Glycol Solution % by mass 0 10 20 30 40 50 60 by volume 0 10 19 29 40 50 60 Freezing Point Temperature
Freeze protection is required so ice crystals do not form and cause severe damage to both the water and refrigeration system. CHOOSING THE PROPER GLYCOL: For getting the most efficiency from your system, a propylene glycol such as “DowFrost” is a must. DowFrost contains
Propylene Glycol Contains DOWFROST™ heat transfer fluid. Freeze protection is required if a system is going to be actively pumping fluid at the lowest ambient temperature and/or where there is no room in the system for expansion to accommodate an ice/slush formation.
propylene glycol; ethylene glycol; can be used to freeze protect water based heat transfer fluids or brines where the temperature in the fluid is below 0 o C (32 o F). Typical advantages and disadvantages for the freeze protection fluids are listed below. Note! Check the related documents listed below for details. Ethanol. low corrosiveness
For freeze protection, the required concentration of inhibited glycol fluid in the system depends on the operating conditions of the system and the lowest expected ambient temperature. To obtain adequate freeze protection, the glycol solution must maintain a freezing point at least 5°F below the lowest anticipated temperature.
%P = Present Glycol Concentration in Circuit (in percent…determine by refractometer). G = Approximate amount (gallons) of Freez-Kontr'l 95/5 or Freez-Therm to add to circuit. Please note this same amount of existing glycol must be removed from the system to accommodate the Freez-Kontr'l 95/5 (Propylene) or Freez-Therm(96/4 Ethylene).
An ethylene glycol freezing point chart shows the freezing point of a solution consisting of ethylene glycol and another fluid. The most common example of such a solution is the antifreeze solution used in automobiles.