Fulton Vertical Tubeless (FT-A) Thermal Fluid (hot oil) Heater - Manual (Page 35)

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SECTION 2
FTA-IOM-2013-0227
INSTALLATION
2-29
!
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.
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
Automatic Fluid Control Valves
Because of the widely varied processes in which Fulton Thermal Fluid Heaters
are used, it is not possible to provide specifi c rules for the selection of automatic
fl uid control valves. Generally, these valves must satisfy the specifi c materials and
construction requirements.
The type of operation and design of porting are governed by the degree of
control required as well as the particular application.
By-Pass Valves
When process fl ow requirements do not match heater fl ow requirements, a by-
pass valve must be installed. If the process fl ow will vary with the system load, a
suitable bypass system can be recommended by Fulton Thermal Corporation.