Marlotherm® LH

TEMPERATURE RANGE -30℃ TO +330℃

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Marlotherm® LH is often used for indirect heating of reactors and process installations, which are both heated and cooled by means of a central heat transfer system and systems where different users must be provided with different temperatures.
The thermal oil system must be designed and used in accordance with the recommendations of DIN 4754 “thermal installations operating with organic heat transfer fluids”.

Marlotherm® LH can also be used at operating temperatures above 280℃ in pressurized systems. The advantage of using Marlotherm® LH in this temperature range compared to pressureless systems with Marlotherm® SH should be assessed separately for each individual situation.
Due to the very narrow boiling range of 4℃, Marlotherm® LH can also be used in the gas-liquid phase, for example for reactor cooling or in exothermic processes.

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]

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