Technical Data Sheet
MARLOTHERM® LH Heat Transfer Fluid
Product Description
Marlotherm LH is a low-viscosity, synthetic organic heat transfer medium for use in both the liquid and vapor phase for closed, forced-circulation heat transfer systems. Marlotherm LH offers outstanding performance and thermal stability at 330°C, which results in reliable, consistent performance over a long period of time. Marlotherm LH is recommended to be blanketed with an atmosphere of inert gas to protect against the effects of fluid oxidation on its performance and life expectancy.
Typical Properties
Property
Test Method
Typical Value, Units
Appearance
Liquid, clear
Composition
Benzyltoluene
Recommended Bulk Temperature
330 °C (625 °F)
Extended maximum use temperature
360 °C (680 °F)
Maximum film temperature
380 °C (715 °F)
Normal Boiling Point
278 °C (532 °F)
Pumpability
@ 300mm2/s (cSt)
-67 °C (-88 °F)
@ 2000 mm2/s (cSt)
<-70 °C (<-94 °F)
Flash Point
COC
ASTM D92
132 °C (270 °F)
Autoignition Temperature
ASTM E659
473 °C (883 °F)
DIN 51794
510 °C (950 °F)
Pour Point
ASTM D 97
-79 °C (-110 °F)
Minimum liquid temperatures for fully developed turbulent flow (NRe > 10000)
10 ft/s, 1-in. tube (3.048 m/s, 2.54-cm tube)
1 °C (34 °F)
20 ft/s, 1-in. tube (6.096 m/s, 2.54-cm tube)
-17 °C (1.4 °F)
Minimum liquid temperatures for transitional region flow, (NRe > 2000)
10 ft/s, 1-in. tube (3.048 m/s, 2.54-cm tube)
-37 °C (-35 °F)
20 ft/s, 1-in. tube (6.096 m/s, 2.54-cm tube)
-48 °C (-54 °F)
Heat of Vaporization
@ 360°C
259 kJ/kg (111 Btu/lb)
Coefficient of thermal expansion
@ 200°C
0.000981 /°C (0.000545 /°F)
Viscosity, Kinematic
@ 40°C
ASTM D 445
2.78 mm
2
/s
@ 100°C
ASTM D 445
1.08 mm
2
/s
Molecular Weight (Average)
182.3
Pseudocritical temperature
499 °C (930 °F)
Pseudocritical pressure
35.2 bar (510 psia)
Pseudocritical density
336.7 kg/m
3
(21.02 lb/ft
3
)
Liquid Density
@ 25°C
ASTM D 4052
992 kg/m
3
(8.28 lb/gal)
Copper Corrosion
ASTM D 130
1a
Moisture Content, maximum
ASTM E-203
300 ppm
Dielectric Constant
@ 23°C
ASTM D-924
2.7
Comments
Properties reported here are typical of average lots. Eastman makes no representation that the material in any particular shipment will conform exactly to the values given.
Eastman and its marketing affiliates shall not be responsible for the use of this information, or of any product, method, or apparatus mentioned, and you must make your own determination of its suitability and completeness for your own use, for the protection of the environment, and for the health and safety of your employees and purchasers of your products. No warranty is made of the merchantability of fitness of any product, and nothing herein waives any of the Seller's conditions of sale.
8/26/2020 4:57:52 AM