Alfa Laval Industrial Series, Instruction Manual

Page: 46 / 46

• Greasing of the tightening bolts
• Metal port covers
• Protection of the plate pack and gaskets
• The packing
7.2 Taken out of service
If, for any reason, the heat exchanger is shut down and taken out of service
for a long period of time, follow the precautions in
Indoor storage on page 45.
However, before storage the following actions must be done.
• Check the measurement of the plate pack (measure between frame plate
and pressure plate, the A dimension).
• Drain both media sides of the heat exchanger.
• Depending on media, the heat exchanger should be rinsed and then dried.
• The connection should be covered if the piping system is not connected.
Use a plastic or plywood cover for the connection.
• Cover the plate pack with non-transparent plastic film.
Start-up after long-term out of service
If the heat exchanger has been taken out of service for an extensive period of
time, longer than one year, the risk of leakage when starting up increases. To
avoid this problem it is recommended to let the gasket rubber rest to regain
most of its elasticity.
1. If the heat exchanger is not in position, follow the instructions in Installation
on page 19.
2. Note the measurement between frame plate and pressure plate ( A
dimension).
3. Remove the feet attached to the pressure plate.
4. Loosen the tightening bolts. Follow the instructions in Opening on page 33.
Open the heat exchanger until the plate pack measure is 1.25× A .
5. Leave the heat exchanger for 24–48 hours, the longer the better, for
gaskets to relax.
6. Re-tighten according to the instructions in Closing on page 38.
7. Alfa Laval recommends a hydraulic test should be carried out. The media,
usually water, should be entered at intervals to avoid sudden shocks to the
heat exchanger. It is recommended to test up to the Design Pressure.
Refer to the PHE drawing.
200000418-2-EN-GB 46
7 Storage of the heat exchanger EN