Gasket Replacement - CIAT ITEX Manuel D'instructions

ENGLISH

5.7 - Gasket replacement

• Remove the old gasket without using cutting tools, which
could irreparably damage the plate.
• Make sure that the plate and gasket are thoroughly clean
and dry alongside the gasket slot.
5.7.1 - Plug-In® Design gaskets
• Press the gasket onto the plate (Fig. 6), making sure that
the leak detector vents, "A", are facing up and check that
the Plug-In® tabs are hooked into their respective notches
(Fig.7). Make sure that the gasket is properly seated in its
notch, then turn the plate over to check again that all the
Plug-In® tabs are correctly in place.
5.7.2 - Plug-In® Design gaskets which may require the use
of glue
• Plug-In® Design gaskets, for initial plates, intermediate turn-
ing plates (for multi-pass heat exchangers only) and final
plates, may require a limited use of glue. These types of
plates, complete with gaskets mounted at the factory, can
be supplied as spare parts. Alternatively, for the substruc-
tion of the gaskets, proceed as described below.
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A: Leak detector vents
are notches in the
surfaces of the gasket
sections around the
portholes which
vent any leaks to the
atmosphere so that
they can be detected.
Fig.6
Fig.7
Initial plate
Cut two gaskets along the vertical axis and use the two parts
with sealing rings inside the holes (Fig.8) to form a complete
initial gasket. Discard the other two halves.
Fig.8
Fig.9
• The half of the gasket for which it is possible to correctly
place all Plug-In® tabs in their corresponding notches, can
be mounted as described in 5.7.1.
• On the other half, use shears to remove all the Plug-In®
tabs and, if present, all the connecting bridges between the
diagonal and the sealing ring (Fig.9 b).So, following the pro-
cedure described in point 5.7.3, attach the gasket, exclud-
ing the sealing rings.
ENGLISH
Intermediate turning plate
(for multi-pass heat exchangers only) and end plate
1. Models equipped with Plug-In® tabs inside the sealing rings:
using shears, cut the Plug-In® tabs inside the sealing rings
(Fig. 9 c) corresponding to the closed holes only. Then, fol-
lowing the procedure described in point 5.7.3, attach only
the connecting bridges between the diagonal and the ring.
2. Models without Plug-In® tabs inside the sealing rings: no
cutting is necessary; proceed as described in point 5.7.1.
NOTE: On some models it might be necessary to remove all
the Plug-In® tabs (not only those inside the sealing rings). In
this case, if permitted, remove the entire gasket.
NOTE: For the DN200 models it is recommended, if permit-
ted, to attach the entire gasket.
5.7.3 - Gluing
• Using the appropriate epoxy glue (supplied as a spare part,
on request), spread a strip of glue (2-3 mm) onto the plate
in the gasket slot.
• Leave to dry for 5 minutes in a suitably ventilated room,
then position the gasket on the plate, making sure that it is
perfectly contained in the slot and that there is no excess
glue escaping from the slot.
• Place a counterweight on the glued plates (without defor-
ming the plastic), ensuring that the whole gasket is evenly
compressed for at least 2 hours.
EN
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