Paratherm™ GLT Heat Transfer Fluid

Paratherm™ GLT Heat Transfer Fluid

Thermally Stable • Low-Temperature Start-Up

The Paratherm GLT heat transfer fluid is an alkylated aromatic based heat transfer fluid formulated for closed-loop liquid-phase heating systems to 550°F.

Applications Include…

Thermally Stable

Paratherm GLT Heat Transfer Fluid exhibited almost 40% less degradation when exposed to 600°F (316°C) for 500 hours than a widely used competitive fluid. Although very few heaters expose the fluid to the maximum film temperature for extended periods, this level of stability helps insure that your system operates trouble free during operating upsets.

Low Temperature Capability

Minimum startup temperature is a realistic measure of a fluid’s low temperature capability since 300 cps is the maximum viscosity that a centrifugal pump can handle. Paratherm GLT Heat Transfer Fluid has a lower minimum start-up temperature 18°F (-6°C) than any mineral-oil based fluids that cover a similar temperature range.

Typical Properties*

Chemical NameAlkylated Aromatic
Appearance Clear Amber Colored
Maximum Recommended Film Temperature600°F / 316°C
Maximum Recommended Operating Temperature550°F / 288°C
Minimum Operating Temperature 20cPs (20 mPa-s)95°F / 35°C
Minimum Start-Up Temperature 300cPs (300 mPa-s)17°F / -8°C
Viscosity @ 60°F / 15.5°C cSt (mm2//sec)63
Density @ 60°F / 15.5°C lb/gal (kg/m3)7.4 (880)
Flash Point Pensky-Martens Closed Cup (D93)>340°F (171°C)
Boiling Point (14.7 psia/101 kPa)>700°F (371°C)
Vapor Pressure @ maximum Operating Temp. psia (kPa)3.5 (25)
% Volume expansion over recommended operation temperature per 100°F (°C)6.0 (10.8)
Average Molecular Weight330


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