Installation, Thermal fluids, Thermal fluids at elevated temperatures – Fulton Vertical Coil (FT-C_S) Thermal Fluid (hot oil) Heater User Manual

Page 18: Selecting a thermal fluid

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© The Fulton Companies 2013

2-12

INSTALLATION

FTCS-IOM-2013-1114

SECTION 2

!

WARNING

All information in this manual is for
reference and guidance purposes,
and does not substitute for required
professional training, conduct,
and strict adherence to applicable
jurisdictional/professional codes and
regulations.

If a fi re does occur, extinguish using
CO

2

, foam or dry chemical. DO NOT

USE WATER.

4

CAUTION

Some plastics can be dissolved by
thermal fl uid.

frequency.

For 3-phase motors, the line to line full load voltage must be balanced
within 1% of the rated motor voltage. If the motor is rated 208-230V, the
voltage deviations must be calculated from 230V. Operation outside of
these limits will degrade motor performance. 575V rated motors cannot be
operated at voltages above 600V. Depending on the motor manufacturer,
a 208V rated motor may not be able to run below the design voltage.

Electric elements will have an increase n watt density if the applied voltage
is higher than the element design voltage. Therefore, electric elements
have a 0% tolerance for operation over design voltage. Electric elements
can tolerate a lower than design voltage but the kW must be derated
accordingly.

Normal supply will be 460 volts, 3 phase, 60 Hz, AC unless otherwise
specifi ed.

Thermal Fluids

Thermal Fluids at Elevated Temperatures

Personnel must be familiar with the nature of potential hazards when working
with thermal fl uids at operating temperatures. Unlike steam or high-pressure
water systems, thermal fl uid attains extremely high temperatures without a
corresponding increase in pressure.

Adhere to the following:

1. Be aware that certain types of thermal fl uid may have operating

temperatures reaching 650°F (345°C) and above, so all exposed pipework is
hazardous and should be insulated.

2. Check that fl anged joints are tight during and after the fi rst warming up of

the system. Turn Burner and pump off before fi ttings are tightened. After
these checks, exposed hot fl anges, pumps, valves and fi ttings should be
fi tted with some sort of shield.

3. Remember that there is pressure generated in the system by the circulating

pump. Care should be exercised when opening any drain or vent valves in
the system. This is especially important during commissioning, when any
air trapped in the system is vented at high points, and when water, which
will fl ash into steam, is either expelled from the deaerator vent or drained
off at low points.

Selecting a Thermal Fluid

The selection of the thermal fl uid most suited to your application is very
important. Factors to be considered include effi

ciency, thermal stability,

adaptability to various systems, and physical properties, including vapor
pressure, freezing point, and fl ash and fi re points.

Heat transfer fl uids of both mineral and synthetic origin have been specially

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