Fulton Vertical Electric (FT-N) Thermal Fluid (hot oil) Heater User Manual
Page 40
Fulton Thermal Corp.*Electric Thermal Fluid Heaters Manual* Version 2010-0423
Page 40
5. Special care must be taken when consulting fluid manufacturers’
literature, as maximum fluid temperatures quoted are the actual limit to
which any of the fluids may be subjected. It is important to remember
that in any fired heater there exists a “film temperature” which is higher
than the temperature of the “bulk” of the fluid.
6. It is the BULK fluid temperature and NOT the FILM temperature that is
indicated by the instruments.
7. As a general guide, the following list of fluids that have given satisfactory
service over many years is provided.
8. This is by no means a complete list. Any fluid specifically designed for
heat transfer use may be considered; multipurpose oils are not
acceptable.
a.
AMOCO
Transfer
Oil
4199
b. CHEVRON
Teknifax
c.
DOW
Dowtherm
A
or
G
d.
EXXON
Caloria
HT
43
e.
MOBIL
Mobiltherm
603
or
605
f. MONSANTO
Therminol
g.
MULTITHERM
PG1, IG4, IG1
h.
PARATHERM
Paratherm NF or HE
i.
PETROCANADA
CalFlo, AF, Purity FG,
CalFlo LT
j.
SHELL
Thermia
23
k.
TEXACO
Texatherm
9. Any fluid specifically designed for heat transfer use must also exhibit
these characteristics:
a. Be a stable and homogenous liquid to a temperature of at least
100°F over and above the maximum intended temperature of
utilization, compatible with metals used in the installation, and
tolerating contact with atmospheric air.
b. The absence of any solid matter in suspension.
c. Non-toxic in the case of leakage.
d. Sufficient lubricity, i.e. not likely to cause seizure.
10. The thermal fluid manufacturer must guarantee the characteristics of the
product, and verify that the fluid bulk temperature limitation exceeds the
expected operating temperature.
11. After a fluid is selected, refer to the manufacturer’s recommendations,
published in compliance with OSHA.
12. If the fluid expansion volume from 50
o
F to 600°F exceeds 20% of the
initial fluid volume, consult Fulton Thermal Corporation.