172-65637MA-05 (GP5C PowerTrap) 8 Jun 2020
26
Causes and Corrective Measures
Category
Cause
Procedure
A.
A valve on
the pipeline
is closed
1. The valve on the motive
medium supply pipe is
closed
2. The valve on the
exhaust pipe is closed
3. The valve on the
condensate inlet pipe is
closed
4. The valve on the
condensate outlet pipe
is closed
• Slowly open the valve, using the proper procedure
Check valves around the PowerTrap. If they are open,
check other valves on pipes connected to the
PowerTrap, as the valve may have been left closed due
to other repairs or maintenance
B.
The strainer
is clogged
1. The strainer on the
motive medium supply
pipe is clogged
2. The strainer on the
condensate inlet pipe is
clogged
• Clean the strainer
Please note that a large amount of rust and/or scale
may accumulate during initial startup of seasonal-use
equipment.
C.
Faulty
motive
medium
pressure,
back
pressure or
pressure
inside
equipment
1. The motive medium
supply pressure is less
than the back pressure
• When the motive medium pressure is decreasing,
adjust the pressure reducing valve on the supply pipe
or connect to a separate high-pressure line
• If the back pressure has increased, check to see if a
steam trap connected to the condensate recovery line
is blowing (see
“Steam System Example”) and check
for any valves that have been left closed on the
condensate recovery line
• The motive medium pressure should be equal to or
greater than 0.05 MPa (7 psi, 0.5 bar) higher than the
back pressure.
2. Insufficient motive
medium
• If the motive medium supply pipe is too small, change
to a larger size pipe; the pipe should be at least 15 mm
(½ in) near the PowerTrap
• In case a tube is used for connecting the motive medium
pipe to the PowerTrap, the tube
’s inner diameter
(including valves and fittings in between) should be at
least 8 mm (
5
/
16
in) and within 3 m (10 ft) length.
3. Pressure inside
equipment or motive
medium supply pressure
exceeds maximum
operating pressure of
PowerTrap
• When the pressure inside the equipment or the motive
medium supply pressure exceeds the maximum
operating pressure of the PowerTrap, the intake-
exhaust valve stays closed, which results in inability to
discharge condensate. Reduce the pressure to lower
than the maximum operating pressure
• Check the reason that the pressure inside equipment or
motive medium supply pressure has increased, and
take any necessary measures to fix it
