Transcal LT is a high quality mineral oil combining low vapour pressure and high levels of thermal stability, specific heat and thermal conductivity with exceptional low temperature fluidity.


Transcal LT is recommended primarily for non-pressurized closed liquid phase heating systems that incorporate both heating and cooling branches (eg: where an exothermic or heat releasing reaction takes place). The low temperature fluidity ensures that adequate circulation occurs in the coolest parts of the circuit. The maximum recommended bulk fluid temperature for Transcal LT is 250°C, and the fluid also operates effectively in cooling systems down to bulk temperatures of 30°C. Before being commissioned, the system should be pressure tested for leaks and then thoroughly flushed with Transcal LT. Water should never be used.

Technical Data

Name Method Units Transcal LT
Density @ 15°C ISO 3675, ASTM D1298 g/ml 0.87
Flash Point (PMCC) ISO 2719, ASTM D93 °C 140
Flash Point (COC) ISO 2592, ASTM D92 °C 152
Kinematic Viscosity @ 40°C ISO 3105, ASTM D445 mm²/s 8.2
Kinematic Viscosity @ 100°C ISO 3105, ASTM D445 mm²/s 2.2
Pour Point ISO 3016, ASTM D97 °C -39
Autogenous-Ignition Temperature ASTM D2155 °C 310
Neutralization Value ASTM D974 mg KOH / g <0.05
Ramsbottom Carbon Residue ISO 4262, ASTM D524 % wt <0.05
Coefficient of Thermal Expansion   per °C 0.00077
Normal Operating Range of Bulk Temperatures   °C -30 to 250
Specific Heat @ 0°C   kcal / Kg *°C 0.45
Specific Heat @ 250°C   kcal / Kg *°C 0.65
Thermal Conductivity @ 0°C   Wt / m *°C 0.118
Thermal Conductivity @ 250°C   Wt / m *°C 0.102
Vapour Pressure @ 245°C   10³ Pa 10

The above figures are typical of those obtained with normal production tolerance and do not constitute a specification.

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