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Therminol VLT*
Coolant/Heat Transfer Fluid



Product Bulletin

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Therminol VLT is a synthetic liquid phase heat transfer fluid with excellent heat transfer and fluid properties for extremely low temperature applications. This fluid is ideally suited for single fluid heating and cooling systems between -115 °C and 175 °C. Performance features of Therminol VLT include:
  • Very Low Temperature Operation – Therminol VLT has excellent heat transfer performance at -115 °C and offers the benefits of liquid coolant temperature control.
  • Cooling and/or Heating Operation - Therminol VLT allows a single fluid to be used in many general purpose processes where both cooling and heating are required. The properties of Therminol VLT allow the same equipment to be used over its wide range of operation.
  • Easy Operation – Using Therminol VLT avoids problems of using multiple fluids in the same piece of equipment and allows low temperature operation with normal centrifugal pumps.

Applications
Therminol VLT can be used in a wide variety of industries, such as:
  • Pharmaceuticals
  • Chiral Chemistry Processes
  • Fine Chemicals
  • Specialty Chemicals
  • Environmental Test Chambers
For more information on Therminol VLT systems and applications, . e-mail us or contact the Therminol Technical Service Hotline at 1-800-433-6997.

Detailed Properties
Click here to download the product bulletin containing detailed physical and transport properties for Therminol VLT.

Typical Properties
Appearance Water-white liquid
Composition Methylcyclohexane/trimethylpentane mixture
Moisture Content, Maximum (ASTM E203-75) 80 ppm
Total Acidity (ASTM D664-81) < 0.2 mg KOH/g
Chlorine Content < 10 ppm
Copper Corrosion (ASTM D-130) << 1 a
Flash Point, Tag Closed Cup (ASTM D-56) -7 °C
Fire Point (ASTM D-1310) -7 °C
Autoignition Temperature (ASTM E-659) 264 °C
Kinematic Viscosity
   at -100 °C
   at 0 °C
   at 100 °C
 
19.0 mm2/s (cSt)
1.14 mm2/s (cSt)
0.41 mm2/s (cSt)
Liquid Density at 25 °C 743.3 kg/m3 (6.20 lb/gal)
Vapor Density at 25 °C 0.2845 kg/m3 (0.01776 lb/ft3)
Coefficient of Thermal Expansion at 100 °C 0.00142/°C
Average Molecular Weight 102
Cloud Point -135 °C
Pumpability, at 300 mm2/s -126 °C
Minimum Temperatures for Fully Developed Turbulent Flow, (Re = 10000)
  10 ft/sec, 1-in tube (3.048 m/s, 2.54-cm tube)
  20 ft/sec, 1-in tube (6.096 m/s, 2.54-cm tube)
 
-76 °C
-93 °C
Minimum Temperatures for Transition Region Flow, (Re = 2000)
  10 ft/sec, 1-in tube (3.048 m/s, 2.54-cm tube)
  20 ft/sec, 1-in tube (6.096 m/s, 2.54-cm tube)
 
-108 °C
-118 °C
Normal Boiling Point 99.2 °C
Heat of Vaporization at Maximum Use Temperature of 175 °C 252.3 kJ/kg (108.6 Btu/lb)
Optimum Use Range -115 ° to 175 °C
Maximum Bulk Temperature 175 °C
Maximum Film Temperature 210 °C
Pseudocritical Temperature 299 °C
Pseudocritical Pressure 35.0 bar (521.7 psia)
Pseudocritical Density 267.8 kg/m3 (16.72 lb/ft3)

*Patent Pending.


NOTICE: Although the information and recommendations set forth herein (hereinafter "Information") are presented in good faith and believed to be correct as of the date hereof, Solutia makes no representations or warranties as to the completeness or accuracy thereof. Information is supplied upon the condition that the persons receiving same will make their own determination as to its suitability for their purposes prior to use. In no event will Solutia be responsible for damages of any nature whatsoever resulting from the use of or reliance upon Information or the product to which Information refers. Nothing contained herein is to be construed as a recommendation to use any product, process, equipment or formulation in conflict with any patent, and Solutia makes no representation or warranty, express or implied, that the use thereof will not infringe any patent.

NO REPRESENTATIONS OR WARRANTIES, EITHER EXPRESS OR IMPLIED, OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR OF ANY OTHER NATURE ARE MADE HEREUNDER WITH RESPECT TO INFORMATION OR THE PRODUCT TO WHICH INFORMATION REFERS.

Therminol® is a registered trademark of Solutia Inc.

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