Anchiale HTO-32 is a heat transfer oil having high viscosity index and narrow boiling point range. The allowed maximum film temperature at the heat transfer interface is 340 °C, and in the system it is 310 °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. The physical properties considered to be important in terms of heat transfer are collected in a separate table below, as a function of the temperature. Anchiale HTO-32 features the following properties:

• Excellent thermal stability and low vapor pressure
• Good oxidation stability
• Limited deposits in the installation
• Non-corrosive and non toxic