58 | INSTALLATION, OPERATION and MAINTENANCE MANUAL
12.3. Cleaning
The APV GPHE can be cleaned without opening (i.e., clean-in-place, also called CIP)
and manual cleaning. The purpose of cleaning is to remove deposits or trapped product
on the plates.
12.4. Manual Cleaning
Manual cleaning is normally accomplished by washing the plates with a soft non-metal
brush, water, and a cleaning agent (Figure 45).
Cleaning agents must not be aggressive or corrosive to the plates or the
gaskets. If in doubt, contact SPX FLOW.
Cleaning agents should always be used according to safety regulations and as specified
by the supplier.
It is recommended to lay the plate on a flat surface during brush cleaning to avoid the
risk of bending the plate.
If the APV GPHE is heavily fouled, care must be taken to remove all debris from the
gasket sealing surfaces when the heat exchanger is reassembled. Any debris will
most likely lead to sealing failures. Do not forget that for glue free gaskets, gasket
sealing surfaces must be checked at the top as well as bottom surface of the gasket.
Figure 45: Manual cleaning
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