Check to make sure that the pipes connected to the trap have been installed properly.
1. Is the pipe diameter suitable?
2. Has the trap been installed within the allowable inclination and with the arrow on the body
pointing in the direction of flow?
3. Has sufficient space been secured for maintenance?
4. Have maintenance valves been installed at the inlet and outlet? If the outlet is subject to
back pressure, has a check valve been installed?
5. Is the inlet pipe as short as possible, with as few bends as possible, and installed so that the
condensate will flow naturally down into the trap?
6. Has the piping work been done correctly, as shown in the table below?
5. Piping Arrangement
Requirement
Diameter is too
small.
Diameter is too small
and inlet protrudes
into pipe.
Rust and scale
flow into the trap
with the condensate.
Condensate
collects in the
pipe.
Correct
Incorrect
Install a catchpot of the
proper diameter.
Make sure the flow of
condensate is not
obstructed.
To prevent rust and scale
from flowing into the trap,
connect the inlet pipe
25 - 50 mm (1 - 2 in) above
the base of the T - pipe.
When installing on the blind
end, make sure nothing
obstructs the flow of
condensate.
6. Operational Check
Normal:
Condensate is discharged continuously with flash steam and the sound of
flow can be heard. If there is very little condensate, there is almost no
sound of flow.
Blocked:
No condensate is discharged. The trap is quiet and makes no noise,
and the surface temperature of the trap is low.
Blowing:
Live steam continually flows from the outlet and there is a continuous
metallic sound.
Live steam is discharged through the trap outlet together with the
condensate and there is a high-pitched sound.
A visual inspection can be carried out to aid in determining the necessity for immediate
maintenance or repair, if the trap is open to atmosphere. If the trap does not discharge to
atmosphere, use diagnostic equipment such as TLV TrapMan or TLV Pocket TrapMan (within its
pressure and temperature measuring range).
(When conducting a visual inspection, flash steam is sometimes mistaken for steam leakage. For
this reason, the use of a steam trap diagnostic instrument such as TLV TrapMan is highly
recommended.)
Steam
Leakage:
Continued on the next page
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English
