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ISO GRADE 68 HEAT TRANSFER OIL SPECIFICATION:
To insure maximum safety and performance, CIMLINE recommends you purchase your oil through
CIMLINE directly. CIMLINE heat transfer oil can be ordered in 5 or 30 gallon (19L and 114L) bulk
quantities and is also included when ordering a CIMLINE maintenance kit. PN 409185 (M1 & M2),
PN 409186 (M4, M4 Dual and MA4).
There are many different types of heat transfer
oils on the international marketplace. It is critical
that you use the proper oil to prevent poor
performance, oil flashing, or auto-ignition. To
conform to most government bids and to supply
a readily available product, ISO Grade 68 heat
transfer oil specifications listed should be the
same as the table to the right.
REFERENCE INFORMATION:
GENERAL DESCRIPTION - Due to the extremely high temperatures experienced in these
applications, the oil must provide excellent thermal stability to resist oxidation, while also providing
good resistance to carbon deposits (coking). CIMLINE heat transfer oil is fully formulated to provide
long service in closed low pressure heat transfer systems such as asphalt processing plants and
sealant material melter’s working at temperatures up to 550°F. Low volatility control enables
operation in closed high temperature, low pressure systems. Excellent conductivity provides rapid
heating and cooling properties in various operations while maintain longer life.
ISO GRADE - Is a viscosity index (ability to flow/thickness). An ISO Grade 68 oil can be an
engine oil, hydraulic oil, etc. The manufacturer uses different additives to make the oil conform to
different applications. YOU MUST CLARIFY WITH THE SUPPLIER that the oil is to be used in a
heat transfer system to avoid any potential problems. The correct and recommended oil is available
from CIMLINE in 5 and 30 gallon (19L and 114L) containers for ship-out.
FLASH POINT - Test in which a container of oil is heated until an open flame will flash when
passed over the fumes.
NOTE: CIMLINE melter applicators use an expansion tank (A),
when the oil heats up and expands, it flows into the expansion tank.
The expansion tank is cooler since it is not part of the oil jacketed
heating system and is surrounded by outside airflow. The only
exposure the hot oil has to the atmosphere is through a 3/4" vent/
overflow pipe (B). This is done so the oil in the oil jacketed tank can
run at higher than the flash point temperatures. Only the lower
temperature oil fumes are exposed to the atmosphere.
M-Series Heat Transfer Oil Specification
ISO Viscosity Grade 68
API Gravity 30.7
Viscosity cSt @ 40° C° 68
Flash Point, COC, F° 420° F
Pour Point, F° 10° F
Using oil that does not meet CIMLINE heat transfer oil
specification is cause for a voided warranty.
NOTICE
(A)
(B)
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