44
45
holes before removing the remainder of the bolts. Remember to mark the position of
the cover plate relative to the shell to ensure that the plate pack is put back in the same
position.
The plate pack is fixed to the cover plate. Pull the cover plate carefully out from the
shell using the lifting lugs and try to protect the flow directors.
NB
Ensure that the exchanger is supported properly and that it remains stable and upright
while service and maintenance are being carried out.
Fig. 4. Vertical overhauling of the plate pack (option 1)
Option 2
When pulling the plate pack out, keep it horizontal, if necessary by using lifting straps.
Place the straps in the lifting lugs on the blind flange. When the plate pack is almost
entirely out of the shell, place two wooden blocks under the plate pack to protect the
flow directors. Place the lifting straps in such a way that they support the plate pack,
as in Figure 5.
Fig. 5. Horizontal overhauling of the plate pack
5.3.3 Mounting the plate pack
Before reinstalling the plate pack, the flow directors must be checked, and if necessary,
corrected. If the flow director rubbers are damaged and need replacing, please contact
Vahterus.
Change the gasket between the cover plate and flange; details of the gasket can be
found on the Technical Data sheet.
COLD OUT
GUIDE BAR
GUIDE BAR
GUIDE BAR
SUPPORT
PULL
WOOD BLOCKS
