Fault tracing
Fault tracing
Pressure drop problems
If the pressure drop has increased.
Action
1.Check that all valves are open including non-return valves.
- Measure the pressure and the
fl
ow rate directly in front of
the inlet and after the outlet of the heat exchanger.For viscous
media use a membrane manometer with a diameter of at
least 30 mm.
- Measure or estimate the
fl
ow rate if possible. A bucket and a
watch showing seconds may be suf
fi
cient for small
fl
ow rates.
For larger
fl
ow rates, use a
fl
owmeter.
Correction
YES
-
NO
-
Action
2.Compare the pressure drop observed with the speci
fi
ed
fl
ow rate (see data printout). Is the pressure drop higher than
speci
fi
ed?
Correction
YES
Check the temperature program, see step 3
NO
If the pressure drop corresponds to the speci
fi
cations,
there is no need for action. If the pressure drop is
lower than speci
fi
ed, the pump capacity is probably
too small or the observation may be wrong. See pump
instruction manual.
Action
3.Check the thermometer readings. Do the readings
correspond to those speci
fi
ed?
Correction
YES
The heat transfer surface is probably clean enough,
but the inlet to the heat exchanger may be clogged by
some objects. Check the port area.
NO
Heat transfer is obviously dropping below
speci
fi
cations, because of deposits on the heat
transfer surface, which at the same time also
increases the pressure drop, since the passage
becomes narrower.
If a Cleaning-In-Place (CIP) system is available, follow
the instructions and use it to wash out the deposits.
Document ID
Language
Edition
34566980-01 EN
2018-01
Instruction Manual -
Fusion-bonded plate heat exchangers
25
EN
Summary of Contents for AlfaNova 14-76, AXP AN
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