172-65473MA-03 (GT5C PowerTrap) 17 Jul 2019
28
Category
Cause
Procedure
D.
Faulty
piping
1. The exhaust is
abnormal
2. The pumped
medium inlet pipe is
too small
3. Not enough
pumped medium is
flowing through the
pumped medium
inlet valve
• Air-locking or vapor-locking has occurred. The exhaust
pipe is connected to the reservoir (inlet pipe), but the
pumped medium may not be exchanged for the
medium inside the PowerTrap for the following
reasons:
1. There are places that accumulate condensate
such as a U-shaped pipe between the exhaust
port and the reservoir (inlet pipe)
2. The inner diameter of the exhaust pipe or tube is
less than 8 mm (
5
/
16
”)
3. The fitting tube is not installed properly.
Change and correct the pipe
Refer to
“Installation Procedure”
• Normal pumped medium flow may not be obtained if
the pumped medium inlet pipe is too small or the valve
on the pumped medium inlet pipe is a needle valve or
one with a small Cv value.
• The pipe and stop valve size must be increased to the
design pipe size, and a full bore ball valve or gate
valve must be used
E.
Faulty
PowerTrap
1. Dirt or scale is
caught in the motive
medium intake-
exhaust valve or the
valve is worn
2. Dirt or scale is
caught in the intake-
exhaust valve seat
or the valve seat is
worn
3. The snap-action
unit is obstructed by
dirt or scale or its
operation is
otherwise faulty
4. The float is broken
or filled with water
5. Dirt or scale is
caught in the trap
unit, resulting in
faulty valve
opening/closing
• If the PowerTrap does not operate for long periods of
time, in spite of the fact that pumped medium has
collected in the reservoir or equipment, if there is no
sound at all of the operating medium flowing in the
motive medium supply pipe/tube and the exhaust
pipe/tube, it is possible that the PowerTrap is faulty.
Note, however, that this phenomenon will also occur
when the motive medium pressure is equal to or less
than the back pressure
• If the PowerTrap does not operate for long periods of
time and the sound of the operating medium can be
heard continuously in the motive medium supply
pipe/tube, the PowerTrap is faulty
Disassemble the PowerTrap, and inspect the following
items:
1. Raise and lower the float and check to make sure
the snap-action unit operates properly
2. Check the motive medium intake-exhaust valve and
valve seat to make sure there is no dirt or scale
caught or any other abnormality
3. Check other possible factors that might hinder
operation
After performing the above inspection, repair any
defects discovered or replace the PowerTrap
