Thermal oil installations filled with Marlotherm® LH can even be started up at -30℃ without problems with centrifugal pumps with a rotating mechanical seal or a permanent magnetic drive or so-called “canned motor pumps”.
The technical characteristics of a filling with Marlotherm® SH can also be adapted to the requirements of a system
and optimized by mixing with Marlotherm® LH.
Marlotherm® LH filled installations and covered with an inert (usually nitrogen) gas with a pressure of less than 100 mbar on the expansion vessel is strongly recommended. Such a nitrogen blanket is the best protection against oxidation formation and the prevention of moisture in the installation.
When operating above the boiling point of Marlotherm® LH, it is necessary to regulate a Nitrogen gas pressure on the expansion vessel so that the thermal oil remains in the liquid phase to prevent the liquid from evaporating via the expansion vessel.
To check the condition of the thermal installation, thermal oil samples should be taken from the main flow of the oil circuit at recommended intervals and sent to the Eastman laboratory for analysis.
For more technical data of Marlotherm® LH, please request the MSDS (Material Safety Data Sheet) to consult. Or for specific or urgent questions you can send them to: [email protected]