54
55
Problem
Cause
Checks
Action
NB!
Pressure
shock
Check the
process
data, if
available
Contact the
manufac-
turer
Mechanical
wear
Pressurise
shell and
find leak.
Localise
leak e.g. with
colouring
agent
Contact the
manufac-
turer
Very poor
perfor-
mance and
very high
pressure
difference
Shell or plate
side chan-
nels clogged
with accu-
mulation of
debris or
scale
Carefully
measure
pressure
loss on both
sides to find
the cause of
the problem.
Clean
exchanger
according to
instructions
(section 5)
Run sched-
uled mainte-
nance/ check
work plan
Filter
clogged
Open filter
and check
its condition
Clean/
change filter
Problem
Cause
Checks
Action
NB!
Issue with
valve and
process
controls
Check
operation of
valves
Open, adjust
or change
valves
Gradual
decline in
heat transfer
performance
Slow build-
up of impuri-
ties on plate
surfaces on
the plate or
shell side
Remove the
plate pack
(openable
model) and
examine the
heat transfer
surfaces.
Welded
models can
be checked
using an
endoscope.
If the shell
side is clean,
fouling of
the plate
side is re-
sponsible for
the retarda-
tion of heat
transfer
Clean
exchanger
according to
instructions
(section 5).
Replace
gasket and
plate pack
(openable
model)
Run sched-
uled mainte-
nance/ check
work plan
