Basic Product Descriptions: PGI and PGI-HD Heat Transfer Fluids

PGI fluid is a formulation of 95.5 % propylene glycol, dipotassium phosphate and water. The fluid colorless (white water). PGI fluid has an operating temperature range of -50 F to 250 F. and solutions in water provide freeze protection to below -60 F and burst protection to below -100 F.

PGI-HD fluid is a formulation of 94.0 percent propylene glycol and a specially designed industrial package of corrosion inhibitors. The fluid is dyed bright yellow to aid in leak detection. PGI-HD fluid has an operating temperature range of -50F to 350F and solutions in water provide freeze protection to below -60F and burst protection to below -100F.

Both fluids are practically odorless and are low in acute oral toxicity. They offer good heat transfer characteristics, good freeze and corrosion protection, and low volatility. These fluids are hygroscopic at low temperatures, which means they attract moisture from the surrounding atmosphere. Both fluids are also non-flammable in solutions up to 80 percent glycol in water.

Typical Product Physical Properties

  Composition (% by Weight)
Propylene Glycol 95.5 94.0
Inhibitors and Water 4.5 6.0
Color Water White Bright Yellow
Specific Gravity (at 60/60F) 1.050 - 1.060 1.053 - 1.063
pH of Solution (50% glycol) 9.0 - 10.0 9.5 - 10.5
 
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