mercury oils

Heat Transfer Fluids


Hitherm FG

Premium food grade heat transfer fluid

Hitherm FG is made with food grade synergistic blends of severely hydro treated and hydro cracked hydrocarbon base fluids. It is formulated to be very thermally and oxidative stable and is further enhanced with proprietary additives that greatly extends the life time over normal and other synthetic food grade heat transfer fluids. It provides exceptional performance in a number of food related Heat Transfer applications.
Hitherm FG is non-toxic and non- hazardous, it meets US FDA 21 CFR 178.3570 lubricants for incidental food contact and is NSF HT-1 approved. It is compatible with mineral and PAO oils.
Hitherm FG is used as a Heat Transfer medium in numerous food related applications,  designed for systems operating at a maximum temperature of 305 °C. The maximum film temperature is 325 °C.

  • Excellent thermal & oxidation stability which contributes to long life at very high temperatures
  • Very high flash, fire & auto-ignition temperatures for added safety
  • Very low volatility and vapour pressures
  • High heat capacity and thermal conductivity
  • Very good deposit control to help keep system clean
  • Low viscosity at operating temperatures for improved pumping efficiency
  • Excellent demulsibility and cold flow properties for smoother start ups

Typical performance data

  HTF 32
Density @ 20°C, g/ml 0.84
Viscosity @ 40°C, cSt 41
Flash point, °C 240
Pour point, °C -10
Carbon residue, % 0.05
Thermal conductivity @ 40 °C, (W/ m.K) 0.132
Thermal conductivity @ 200 °C, (W/ m.K) 0.120
Coefficient of thermal expansion, per °C 0.0008
NSF registration 138898
Kosher approval Yes


Download Data Sheet