Glycol Percentage Relative to Freeze Point Propylene Glycol www.ClenAir.com Freezing Point Propylene Glycol Solution (%) 0% 10% 20% 30% 40% 50% 60%
DOWFROST heat transfer fluids, the glycol affects the refractive index of the fluid in a similar fashion. a Freezing 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
Freezing points of propylene glycol based heat-transfer fluids - suitable for the food processing industry Sponsored Links For many heat-transfer applications it is necessary to use a heat-transfer fluid with lower freezing point than water.
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
Freezing Point Propylene Glycol Solution (%) by mass 0 10 20 30 40 50 60 by volume0 10 19 29 40 50 60 Temperature oF 32 26 18 7 -8 -29 -55 oC 0 -3 -9 -16 -23 -35 -48 Due to slush creation propylene glycol and water solutions should not be used close to the freezing points.
Under normal conditions, propylene glycol and its homologs set to glass-like solids, rather than freezing. The addition of water to a glycol yields a solution with a freezing point below that of water. This has led to the extensive use of glycol-water solutions as cooling media at temperatures appreciably below the freezing point of water ...
to operate at temperatures below the freezing point of water. It then becomes necessary to suppress the freezing point in order to protect the system from freezing or bursting pipes. In these types of applications, adding propylene glycol to the water will achieve the desired operating temperature.
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.
Even through they do lower the freeze point, plain glycols are even more corrosive than water. The corrosion rate of plain ethylene glycol on iron, for example, is more than 2.5 times faster than plain water.