ETHYLENE GLYCOL HYDROMETER SCALE - For cooling systems larger than shown, use double the quantity of antifreeze/coolant required for a system one-half as large. For systems smaller than shown, use half the quantity of antifreeze/coolant required for a system twice as large. Ethylene Glycol-Based Engine Antifreeze/Coolant Protection Chart
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
Ethylene glycol is also commonly used in heating applications that temporarily may not be operated (cold) in surroundings with freezing conditions - such as cars and machines with water cooled engines. Ethylene Glycol is the most common antifreeze fluid for standard heating and cooling applications.
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.
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.
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
DOWFROST heat transfer fluids, the glycol affects the refractive index of the fluid in a similar fashion. aFreezing points are below -50°C ( 60°F). NOTE: Generally for an extended margin of protection, you should select a temperature in this table that is at least 3°C (5°F) lower than the expected lowest ambient temperature.
You may remember that about 93% of most coolant is ethylene glycol, another few percentage points are water and/or a solvent to keep rust/corrosion inhibitors in solution and the remainder are those inhibitors. The inhibitors make a huge difference, and they're what all the arguments are about. Didn't we talk about all these coolants last year?
The use of a water-glycol mixture is needed when the operator desires a process temperature below 48°F. 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:
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