Operation English
Plate Heat Exchanger 7
eng
Unit in operation
During operation, check that
media temperatures and pressures are within
the limits stated on the PHE-drawing
no leakages appear due to faulty tightening
of the plate pack or to defective or damaged
gaskets
carrying bar and guiding bar are kept clean
and greased
the bolts are kept clean and greased.
Always consult your local Alfa Laval office for
advice on
• new plate pack dimensions if you intend to
change number of plates
• selection of gasket material if operating temper-
atures and pressures are permanently
changed, or if another medium is to be proc-
essed in the PHE.
Shut-down
Slowly close the valve controlling the flow-
rate of the pump you are about to stop.
When the valve is closed, stop the pump.
Repeat steps 1–2 for the other side.
If the heat exchanger is shut down for sev-
eral days or longer, it should be drained.
Draining should also be done if the proc-
ess is shut down and the ambient temper-
ature is below freezing temperature of the
media. Depending on the media proc-
essed, it is also recommended to rinse and
dry it.
Note!
Adjustments of flowrates should be made
slowly in order to protect the system
against sudden and extreme variations of
temperature and pressure.
No leakage
Clean and
greased
Note!
If several pumps are included in the system,
make sure you know which one should be
stopped first.
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