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8. Start-up and operation
8.1 Start up
Ì! Start-up of the plate heat exchanger must
be undertaken slowly and smoothly to avoid
any pressure shocks/water hammering which
might damage the equipment or cause
leakage.
Do not allow pressure changes of more than
10 bar (150 psi) per minute. Temperature
changes may be harder to control but ideally
should be limited to less than 10 deg C (20
deg F) per minute. Cyclic hydraulic or
thermal conditions can cause serious
damage to the PHE.
If the plate heat exchanger is provided with
shut-off valves at the inlets, these should be
closed prior to start-up and then opened
slowly after pump start-up
For sanitary heat exchangers with multiple
sections, also read section 9.4 titled
Reassembly before proceeding.
8.2 Operation
The APV plate heat exchangers are
designed according to predefined
temperatures, allowable pressure drops,
design pressures and fluid compositions.
Ì! Exceeding the design temperatures and
pressures can be harmful to the equipment
and personnel, and must be avoided.
Deviations from the designated fluid composition
may cause corrosion of the plates and damage
on the gaskets, even if the deviations occur over
relatively short time periods.
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