Duratherm HF

Engineered for its high flash point of 277°C (530°F) with an operating limit of 338°C (640°F), the Duratherm HF heat transfer oil offers a solution to those customers requiring the additional margin of safety needed to meet their own internal safety standards or those of their insurance carrier or government regulators.

  • 277°C (530°F) flash point
  • 338°C (640°F) maximum operating temperature
  • Extensive additives for extended service life
  • Strong resistance to oxidation
  • Keeps systems running clean and efficiently
  • Non-toxic and non-hazardous oil – requires no special handling
Temerature Ratings
Maximum Bulk/Use Temp 338°C
Maximum Film Temp 360°C
Pour Point ASTM D445 -9°C
Safety Data
Flash Point ASTM D92 277°C
Fire Point ASTM D92 306°C
Auto Ignition ASTM E-659-78 393°C
Thermal Properties
Thermal Expansion Coefficient 0.182 %/°C
Thermal Conductivity W/m·K
38°C 0.149
100°C 0.147
204°C 0.145
260°C 0.145
288°C 0.144
316°C 0.144
Heat Capacity kJ/kg·K
38°C 1.876
100°C 1.986
204°C 2.168
260°C 2.269
288°C 2.319
316°C 2.366
Physical Properties
Viscosity ASTM D445 cSt
40°C 104.26
100°C 12.46
204°C 2.36
260°C 1.47
288°C 1.22
316°C 1.04
Density ASTM D1298 d/ml
38°C 0.859
100°C 0.836
204°C 0.798
260°C 0.778
288°C 0.768
316°C 0.758
Vapour Pressure ASTM D2879 kPa
38°C 0
100°C 0
204°C 0.138
260°C 1.517
288°C 4.206
316°C 11.997
Distillation Range ASTM D2887
10% 446°C
90% 555°C
Average Molecular Weight 399
Specific Gravity @ 16°C .867

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