Heat Transfer Fluid

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Heat Transfer Fluid

Duratherm 630

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

Duratherm 630 is a high-performance, efficient and environmentally friendly fluid engineered for applications requiring high temperature stability to 630°F. Offering precise temperature control, it’s a great alternative to high-temperature aromatic fluids, at a fraction of the cost.

It is ideal for a wide range of applications, including high-temperature batch processing, chemical reactions, pharmaceutical and resin manufacturing, among others.

The Difference

Our exclusive additive package, including a proprietary dual-stage antioxidant, ensures long, trouble-free operation. Duratherm also incorporates metal deactivators, a seal and gasket extender, and defoaming and particle-suspension agents.

Lasts Longer

In the heat transfer fluid industry, cost is always a concern. However, fluid longevity and resistance to harmful fouling are of equal importance.

Air contact is normally detrimental to a fluid. Oxidation can cripple your system and, if left unchecked, will ultimately cause catastrophic failure. Unscheduled downtime due to oil failure has a high cost and negative effect on production.

The Duratherm product line was developed with this in mind. Most other fluids fall short in their protection from oxidation and can quickly foul a system. Duratherm is engineered to give unsurpassed levels of protection and service life.

Runs Cleaner

In our effort to truly service the heat transfer industry, we have developed unique and specific heat transfer system cleaners. Ranging from preventative-maintenance system cleaners to emergency-downtime system revivers, we have a cleaner that fits your needs and schedule.

Environmental

Duratherm 630 is environmentally friendly, non-toxic, non-hazardous and non-reportable. Worker health and safety is of great concern,  Duratherm 630 poses no ill effect to worker safety. After its long service life, it can easily be disposed of with other waste oils.

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Duratherm 630 Properties
Appearance: colorless, clear and bright liquid
Maximum bulk/use Temp. 630°F 332°C
Flash PointASTM D92 444°F 229°C
Fire PointASTM D92 472°F 244°C
AutoignitionASTM E-659-78 693°F 368°C
ViscosityASTM D445  
cSt at 104°F / 40°C 36.2  
cSt at 212°F / 100°C 7.0  
cSt at 600°F / 316°C 0.7
Pour PointASTM D97 -1°F -18°C
DensityASTM D1298 lb/ft3 g/ml
at 100°F / 38°C 52.8 0.845
at 500°F / 260°C 43.4 0.695
at 600°F / 316°C 41.2 0.659
Average Molecular Weight 395
Carbon ResidueASTM D189 0.005 % Mass
Sulphur ContentX-RAY <.001 weight %
CU Strip CorrosionASTM D130 1a  
Thermal Expansion Coefficient 0.0562 %/°F 0.1011 %/°C
Thermal Conductivity BTU/hr F ft W/m K
at 100°F / 38°C 0.082 0.141
at 500°F / 260°C 0.075 0.129
at 600°F / 316°C 0.074 0.128
Heat Capacity BTU/lb F kJ/kg K
at 100°F / 38°C 0.471 1.971
at 500°F / 260°C 0.646 2.704
at 600°F / 316°C 0.686 2.872
Vapor PressureASTM D2879 psi kPa
at 100°F / 38°C 0.00 0.00
at 500°F / 260°C 0.39 2.68
at 600°F / 316°C 1.64 11.30
Distillation RangeASTM D2887 10% 727°F (386°C)
  90% 902°F (483°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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