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No engineer has to be told that downtime of regulating valves is costly-and
a nuisance.
Nowadays the men who keep these
valves operating want to make sure
they aren't stuck with a maintenance
headache for the life of their valves.
That's why we are outlining this simple check list which covers three important features which keep maintenance costs down.
1. Stuffing boxes are probably the number one time consumer in valve maintenance. No matter how you figure it,
repacking stuffing boxes is costly.
That's one reason Spence uses a "bal-anced" diaphragm construction which
)eliminates stuffing boxes. Simple stem
guiding and large metal diaphragm op-
eration reduce sticking and binding to
a minimum.
2. Another problem is replacement of
seats and discs when they've been cut
by steam. Today you can forget about
this problem entirely by insisting on an
unconditional guarantee against wiredrawing. Spence, for instance, uses
SECO Metal seats and discs and gives
such a guarantee.
3. Any valve designed to control temperature and pressure within tight limits can be affected by dirt in the steam
lines. You can't get a guarantee against
this, but you can specify a valve that
makes trouble shooting easy. Here's
the tip:
Make sure your regulating valve is controlled by an external pilot. If trouble
develops, it is easy to find out if it is in
the pilot or the main valve with a sihl-pIe test.
If the trouble is in the pilot, you can
remove it without taking the main
valve out of the line.
The quickest way to get the regulator
working again is to install a spare pilot.
This is easy-and in the Spence design
it is not expensive to carry spare pilots.
Spence pilots fit all sizes of Spence
main valves.
These maintenance advantages plus
other advanced features are available
in a wide range of Spence automatic
regulating valves. For more information write for the Bulletin TE.
SPENCE ENGINEERING COMPANY, INC.
