Heat Transfer Fluid

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Heat Transfer Fluid

Duratherm XLT-50

  • "We have had no issues with Duratherm versus the old oil we were using." — J. Cowger Jr.
  • "I commend you on the quality and longevity of your products." — H. Blair
  • "Duratherm G is working excellently!" — Ian Smiley
  • "Duratherm is working great." — J. Cowger Jr.
  • "Duratherm was one of the best moves we made. Working great!" — Neil McDivitt
  • "Yet another bonus was that the pricing was below comparable fluids." — S. Bailey Sr.
  • "Duratherm is working great." — K. Rose
  • "I've had zero failures in over a year-and-a-half since using Duratherm." — R. Barnett
  • "Duratherm HF has been performing remarkably well." — Raghu Kamath
  • "Duratherm 600 is the best fluid we’ve ever used!" — John Wanninger
  • "Our oxidation problems have disappeared." — H. Blair
  • "Duratherm saves money in the long run." — J. Smith
  • "The heat transfer works better than any of the other fluids we have tried." — Lars Hvalby
  • "This will definitely be my go-to fluid for future projects." — Ryan Seward
  • "Duratherm provides excellent heat transfer characteristics." — Ryan Seward
  • "This stuff is pretty amazing." — Ryan Seward
  • "Duratherm XLT-120 is exactly what we needed!" — Luke Colby
  • "I would highly recommend this product over any other heat transfer fluid." — J. Cowger Jr.
  • "The fluid is still clear … I can see the bottom of the tanks." — S. Bailey Sr.
  • "The fluid is working better than expected." — Dick Livingston
  • "We have increased the time between oil changes and nearly eliminated any issues." — J. Smith
  • "I've even recommended Duratherm to the equipment manufacturer." — Ed Slack
  • "A few companies along the way have been helpful, but none like Duratherm." — K. Rose
  • "The difference between Calflo and Duratherm was amazing." — J. Gerbec
  • "Duratherm is the best heat transfer fluid we've ever used." — Larry Daniels
  • "Duratherm does not sludge up at all." — Bill Corbett
  • "These products performed exceptionally well for us." — S. Poletto

Duratherm XLT-50 is engineered for long-term operation in heat transfer applications requiring precise temperature control ranging from -50°F up to 350°F (-45°C to 176°C).

Ideal for cryogenic applications, Duratherm XLT-50’s economical cost and wide operating temperature also makes it well-suited for heating and cooling applications found in the food processing, pharmaceutical and chemical industries.

Trouble-Free Operation

Duratherm XLT-50 heat transfer oil does not require monitoring of concentration or additive levels.

Longevity

Duratherm XLT-50 heat transfer oil utilizes our exclusive additive system for long-term, trouble-free operation at any temperature, high or low.

Environmental

Duratherm XLT-50 heat transfer oil is plant- and user-friendly. Low odor, high flash point and no SARA-reportable substances make XLT-50 the wise choice for worker health and safety.

Disposal

After its extensive service life, Duratherm XLT-50 heat transfer oil can be disposed of through local waste oil recycling programs. Check your local regulations.

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Duratherm XLT-50 Properties
Appearance: clear liquid, slight yellow tint
Maximum bulk/use Temp. 350°F 176°C
Minimum bulk/use Temp. -50°F -45°C
Flash Point ASTM D92 210°F 99°C
Fire Point ASTM D92 240°F 115°C
Viscosity ASTM D445  
cSt at -22°F / -30°C 20.2  
cSt at 86°F / 30°C 1.9  
cSt at 350°F / 176°C 0.6
Pour Point (estimated) -140°F -70°C
Density ASTM D1298 lb/ft3 g/ml
at -22°F / -30°C 53.8 0.863
at 86°F / 30°C 52.0 0.832
at 350°F / 176°C 40.0 0.640
Carbon Residue ASTM D189 0.005 % Mass
Sulphur ContentX-RAY <.001 weight %
CU Strip Corrosion ASTM D130 1a  
Thermal Conductivity BTU/hr F ft W/m K
at -22°F / -30°C 0.080 0.138
at 86°F / 30°C 0.077 0.133
at 350°F / 176°C 0.067 0.115
Heat Capacity BTU/lb F kJ/kg K
at -22°F / -30°C 0.465 1.946
at 86°F / 30°C 0.495 2.072
at 350°F / 176°C 0.597 2.499
Vapor Pressure ASTM D2879 psi kPa
at -22°F / -30°C 0.00 0.00
at 100°F / 38°C 0.02 0.13
at 350°F / 176°C 9.26 63.84
Distillation Range ASTM D2887 10% 358°F (181°C)
  90% 546°F (285°C)

*The values quoted in the table above are typical of normal production. They do not constitute a specification.

Technical Papers

Heat Transfer Fluid Basics

Selecting a Fluid

Using a Heat Transfer Fluid

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