4
Insert the plates in alternate directions and
with the gaskets turned towards the frame
plate or pressure plate as specified on the
plate hanging list. Use the marked line that
was made when the heat exchanger was
opened, refer to 7 on page 35 in Opening on
page 33..
5
Press the plate pack together and put the
tightening bolts in their positions. Tighten the
bolts alternately in numeric order, 1 to 6
until.the plate pack measure A is 1.10.
Alternatively tighten the bolts alternately in
numeric order, 1 to 8 until.the plate pack
measure A is 1.10A. Make sure that the
frame plate and pressure plate are in parallel
during the closing procedure.
6
Tighten the bolts alternately in numeric order,
1 to 6. Alternatively tighten the bolts
alternately in numeric order, 1 to 8. Repeat
this procedure until dimension A is reached.
NOTE
Make sure that the frame plate and the
pressure plate are always positioned in
parallel (within maximum 10 mm).
6.6 Pressure test after maintenance
Neither of these processes are allowed unless performed by a person
authorized according to local laws and regulations and following applicable
standards. If no such person is internally available, a third party authorized
entrepreneur working per local legislation using proper equipment shall be
engaged.
Before the start-up of production, whenever plates or gaskets have been
removed, inserted or exchanged, it is strongly recommended to perform a
hydrostatic leakage test to confirm the internal and external sealing function of
the heat exchanger. In this test, one media side at a time must be tested with
the other side open to the ambient pressure. In a multi-pass set up, all
sections of the same side must be tested simultaneously. The recommended
test time is 10 minutes for each media side.
200000547-4-EN-GB 41
Maintenance 6 EN
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