Maintenance - Emerson Spence B Series Instruction Manual

B Series

Maintenance

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WARNING
To avoid personal injury, property
damage or equipment damage caused
by sudden release of pressure or
explosion of accumulated gas, do
not attempt any maintenance or
disassembly without first isolating the
steam trap from system pressure and
relieving all internal pressure from the
steam trap.
Steam traps that have been
disassembled for repair must be
tested for proper operation before
being returned to service. Only parts
manufactured by Emerson should be
used for repairing this steam trap.
Due to normal wear or damage that may
occur from external sources, this steam
trap should be inspected and maintained
periodically. The frequency of inspection
and replacement of parts depends upon
the severity of service conditions or the
requirement of local, state and federal
rules and regulations.
Do not remove cover while the trap is
very hot. Wait until steam pressure has
dropped and trap can be comfortably
touched with bare hand.
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Never open a steam shut off valve
rapidly. Condensate always collects
at the upstream side of a closed,
untrapped steam valve. Waterhammer,
destructive to equipment, piping and
traps, can be initiated by quick opening
of such valves.
4
CAUTION
1. Adopt a reasonable "Preventive Maintenance"
program to schedule all traps for internal
inspection and cleaning.
2. Do not drop traps or spare bellows.
3. Do not use a Stillson or Monkey wrench to remove
or replace bellows or tighten them excessively in
trap cover.
4. Do not store, pile or carry bellows with tools and
pipe fittings.
5. Most trap operating difficulties and failures are
caused by circumstances which the trap cannot
control. Some examples are pipe scale, dirt,
water-hammer, corrosive condensate, improper
installation and inaccessible location. Try to avoid
or correct these detrimental conditions.
6. Ensure to regularly blow down and clean strainers
and dirt pockets.
Testing
1. Periodically test the operation of all traps, which
are piped so the discharge will not be observed.
Use a three-way test valve for visual discharge.
A stethoscope or ultrasonic device can be utilized
for testing intermittent discharge types of traps.
If test valves have not been installed, check
temperatures of inlet and outlet piping close to
the trap. Use a surface pyrometer or an infrared
temperature device to detect temperature. Check
for the following conditions:
a. If inlet piping is hotter than outlet piping,
with temperature of latter rising and falling
in sequence with trap discharge, trap
is satisfactory.
b. If inlet piping is considerably cooler than
known temperature of the steam supplied
to equipment drained, trap is either not
discharging or is too small for the application.
2. The recommended frequency of trap testing
depends on the importance of each application
and the operating conditions.