Marlotherm® N has proven to be extremely stable over the entire temperature range as mentioned above. At high temperatures, thermal decomposition can lead to the formation of “low and high boilers”, however in acceptable quantities. The “low boiler” fractions can easily be discharged via the expansion vessel during normal working hours or during a maintenance stop. To guarantee safe operation of the installation, it is necessary to avoid a high concentration of these “low boilers”.
Other degradation products will remain in solution in the thermal oil. When the quantities of “high Boilers” reach the 15% level (seen on every chemical analysis) the filling must be renewed.
Marltherm® N, when used as recommended, will not produce highly viscous or solid dirt particles (solids).
As an organic thermal oil, Marlotherm® N is relatively stable in contact with oxygen. The product, especially suitable in heat transfer systems in the process industry, calenders, etc. where contact of the thermal oil and oxygen cannot always be prevented due to the construction of these types of machines. The viscosity of Marlotherm® N allows normal use with standard centrifugal pumps at temperatures as low as -10 ° C without problems.
Marlotherm® N can be pumped without any problems during a refill or start up, even in less favorable weather conditions. The construction and operation of a thermal oil installation must comply with the recommendations of the DIN 4754 standard.
The condition and chemical stability of the thermal oil should be checked at least once a year by chemical analysis. This analysis is carried out by the Eastman laboratory and can be requested via [email protected]
The analysis is free, if you even take the oil sample (according to our conditions).