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 Maintenance requirement tags (yellow and white)
Valve wrench
Water squeeze bottle
Ultrasonic sound detector
Thermocouple thermometer
2 . 4 . 1 Description of Test procedure (see figure 1):
F i r s t close Valve (l). Then close valve (2), as this prevents back
feeding of steam from the condensate header. Open valve (3). Valve
( 3 ) is part of the test "T" which has been installed previously for
testing the steam trap. If steam blows out of test T, this is an
i n d i c a t i o n that trap is malfunctioning. If only condensate drips out,
t h i s indicates that the trap is functioning properly (Note that a
small amount of flash steam could come out). T h e n open valve (4). If
steam blows out of valve (4) under pressure, it means the trap is
holding steam and that there was steam up-stream of the trap during
test.
After the tests are complete, open (2), close (3), close (4) and
slowly open (1) for normal operation.
Note that there is no longer a by-pass around the steam trap. All
v a l v e s should be ball requiring 1/4 turn from fully open to fully
closed. All valves should have round handles instead of bar handles
f o r safety. Clothing could catch on a bar handle and accidentally
open the valve. The test "T" end pipe and the end pipe for valve (4)
should point down to the ground or in another safe direction.
2 . 4 . 2 Check-off List. The following is a summary of steps for routine
inspections that apply the methods outlined in paragraph 2.3.
( a ) For All Traps:
Is steam on?
Is trap hot - at operating temperature?
N e t test for signs of a hot trap. Squirt a few drops of water
on trap. Water should start to vaporize immediately. I f i t
d o e s not, this indicates a cold trap.
Tag cold traps with a yellow tag for maintenance check to
determine if it is a system or trap problem.
Blow down strainer.
3-33
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