Fulton Vertical Coil (FT-C_S) Thermal Fluid (hot oil) Heater - Manual (Page 36)

© The Fulton Companies 2013
2-30
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.
withstand overpressure equal to the rating of the safety relief valves (normally
100 psig).
 Thermometers
Thermometers should read up to 650°F (343°C). For systems with higher
operating temperatures, thermometers should be selected accordingly.
 Valves
Adhere to the following for valve installation:
1. Use vent and drain valves that normally are 1/2” or 3/4” with internal seals
made from materials suited to use with thermal fl uids. They may be of the
screw type if installed on stalks not less than 12” (30.5 cm) long.
2. Use gasketing material specifi cally suited to the task.
3. Fit drain valves at all low points in the pipework system and ventilating
valves at all high points in the installation. Valves must be fi tted with either
the conventional packed stuffi
ng box seal or a bellows seal as required.
4. Where the stuffi ng box is specifi ed, it should be as deep as possible and
packed with Grafoil packing or equal. The valves should have a backseating
to allow re-packing without draining the system.
5. In all units, install a “Y” type strainer in the fl uid return line, between the
deaerator tank and the circulating pump. This strainer is provided on
all skid-mounted units. Valves must be provided (unless the heater has
been skid-mounted with the tank) so that the strainer can be isolated for
cleaning of the element. The strainer element should be 60 mesh and must
remain in place during normal operation of the system.
6. Check the pump suction pressure periodically, under similar operating
conditions. A vacuum reading on the suction gauge indicates that the
screen must be cleaned. For isolating purposes, globe, wedge, gate, ball, or
other shut-off valves should be used. When there is a likelihood that some
manual balancing will be required, a ball or globe valve should be used.
7. Ensure manual control and isolating valves are of the fl anged or weld type,
manufactured from cast or forged steel or ductile iron, with internals and
gland seals made from materials suitable for use with high temperature
fl uids.
8. When ordering valves, obtain the maximum possible service temperature
and type of fl uid. A partial list of manufacturers known to market valves of
acceptable quality follows:
 Stockham Valves and Fittings Company
 Velan
 Vogt Machine Company
 Worcester Valve Company