Ethylene Glycol based water solutions are common in heat-transfer applications where the temperature in the heat transfer fluid can be below 32 o F (0 o C).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.
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
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.
Glycol Charts & About Glycol. ABOUT GLYCOL IN CHILLERS. A chiller will run without glycol as long as the fluid temperature in the system is above freezing. Glycol or other inhibitors are recommended for most process cooling applications even if the fluid temperature doesn’t reach temperatures near freezing.
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 ºF 32 26 18 7 -8 -29 -55 ºC 0 -3 -8 -14 -22 -34 -48
A Guide to Glycols 10 Glycol-based solutions can give excellent burst protection across a wide range of cold temperatures as indicated in Figure 1. Consideration should be given to having appropriate expansion space for the solution and to the need for an inhibited glycol-based product such as DOWFROST*,
Ethylene Glycol Product Guide. Ethylene Glycol 1 Table of Contents INTRODUCTION 2 .....Precautions ... Conversion Chart of Aqueous Solutions of Ethylene Glycol at 68°F (20°C) 13 .....Figure 2: Freezing Points of Aqueous Ethylene Glycol Solutions ... Vapor Pressures of Ethylene Glycol at Various Temperatures 17 .....Figure 6: Vapor Pressures ...
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
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.