Heat Transfer Fluid

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Heat Transfer Fluid

Duratherm FG

  • "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've had zero failures in over a year-and-a-half since using Duratherm." — R. Barnett
  • "I would highly recommend this product over any other heat transfer fluid." — J. Cowger Jr.
  • "We have increased the time between oil changes and nearly eliminated any issues." — J. Smith

Duratherm FG is rated for use up to 620°F and is engineered and manufactured to comply with the demands of food grade applications.

Duratherm FG meets USDA requirements for incidental food contact and NSF registered HT1 and meets the requirements of 21CFR1783570.

Ideal for any application requiring food grade rated process oils such as food processing, bottling, food packaging etc.

The Difference

Our exclusive additive package, including a proprietary dual stage anti-oxidant, ensures long trouble free operation. Duratherm also incorporates metal deactivators, a seal and gasket extender, 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.

Environmental

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

System Cleaning

In our effort to truly service the heat transfer industry, we have developed 4 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.

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Duratherm FG Properties
Appearance: colorless, clear and bright liquid
Maximum bulk/use Temp. 620°F 326°C
Flash Point ASTM D92 440°F 227°C
Fire Point ASTM D92 466°F 241°C
AutoignitionASTM E-659-78 682°F 361°C
ViscosityASTM D445  
cSt at 104°F / 40°C 40.4  
cSt at 100°C / 212°F 6  
cSt at 600°F / 316°C 0.7
Pour Point ASTM D97 1°F -17°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 D189A 0.005 % Mass
Sulphur ContentX-RAY <.001 weight %
CU Strip CorrosionASTM D130 1a
Thermal Expansion Coefficient 0.0564 %/°C 0.1016 %/°F
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% 769°F (410°C)
  90% 930°F (499°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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