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Alfa Laval S 921 - Page 57

Alfa Laval S 921
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8.4 Interface Description 8 Technical Reference
375 Inlet for discharge and make-up liquid
Processing in all modes:
It is recommended to supervise the supply
pressure. If pressure is too low (see Connection
List), start should be interlocked and if it
happens in PRODUCTION or CLEANING turn
over to STAND BY should take place.
Signal processing in STARTING:
Below 85 % of synchronous bowl speed no
water supply may be made.
When coming from PRODUCTION a discharge
shall be initiated to remove sediment from bowl
to avoid problems due to solidification, see
Connection List.
Signal processing in PRODUCTION:
Automatic discharges shall be initiated by timer
or ALCAP system.
Signal processing in CLEANING:
Automatic discharges shall be initiated by timer
or CIP-control system.
Signal processing in NORMAL STOP:
Discharges should not be made.
Signal processing in SAFETY STOP and
EMERGENCY STO P:
Discharges should not be made.
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