MOL Thermol 46

MOL Thermol 46 is a mineral oil based heat transfer oil having high viscosity index and narrow boiling point range. The allowed maximum film temperature at the heat transfer surface is 350 °C, and in the system it is 330 °C. The service life of the heat transfer medium depends greatly on the design of the heat transfer system and on the operating conditions. The service life could be up to 5 years, if the system is designed properly, and when it is protected from extreme load conditions. The service life could be extended significantly if low pressure (1.2 - 1.5 bar gage pressure) inert gas atmosphere (nitrogen) is used in an expansion tank. For safety and economic reasons, it is recommended to check the condition of the oil on a regular basis, but once a year at least. Handling MOL Thermol 46 is safer than when handling most other synthetic oils, as it is not toxic and has a low vapour pressure. It can be collected as used oil after its application, for recycling or disposal. The physical properties considered to be important in terms of heat transfer are collected in a separate table, as a function of the temperature.