Paratherm™ GLT HTF
THERMALLY STABLE • LOW-TEMPERATURE START-UP
The Paratherm™ GLT heat transfer fluid is a thermally stable fluid with an alkylated aromatic based heat transfer fluid formulated for closed-loop liquid-phase heating systems to 550°F; Chemical equivalent and compatible with Therminol® 55.
OPERATING RANGE
| Minimum Startup Temp (300cSt) | Maximum Operating Temp |
|---|---|
| 12°F / -11°C | 575°F / 302°C |
FEATURES
- Low temperature pumpability
- Broad compatibility with synthetic aromatics
- Excellent thermal efficiency vs. standard mineral oil HTF’s
APPLICATIONS INCLUDE
THERMALLY STABLE
Paratherm™ GLT Heat Transfer Fluid is a thermally stable fluid that 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 thermally stable heat transfer 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.
COMPARISON OF PARATHERM™ GLT WITH THERMINOL 55*
Performance Data: Paratherm™ GLT vs. Therminol 55
ASTM D6743 – Thermal Stability of Organic Heat Transfer Fluids
Fluid samples held at 316°C (600°F) for 500 hours to assess stability to continuous thermal stress
The total degradation is determined by the total mass percentage of high boilers, low boilers and other decomposition products found in the thermally stressed sample. This value reflects the overall thermal degradation of the stressed fluid as a direct result of thermal stress.
A lower degree of decomposition is directly proportional to the overall thermal stability of the heat transfer fluid relative to other samples tested under the same conditions
RESULTS MATTER
Paratherm™ GLT exhibits superior stability with nearly half the total degradation experienced by Therminol 55 under demanding conditions
*Therminol 55 is a trademark of Eastman Chemical Company.
TYPICAL PROPERTIES*
| Chemical Name | Alkylated Aromatic |
| Appearance | Clear Amber Colored |
| Odor | Sweet |
| Maximum Recommended Film Temperature | 600°F / 316°C |
| Maximum Recommended Operating Temperature | 575°F / 302°C |
| Minimum Operating Temperature 20cPs (20 mPa-s) | 95°F / 35°C |
| Minimum Start-Up Temperature 300cPs (300 mPa-s) | 12°F / -11°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 Weight | 330 |
