Niro Soavi S.p.A
2.13.2.1 STERILIZING THE MACHINE
Before starting up the machine following an extended period of standstill - or at
first start-up - we recommend sterilizing the areas to be maintained aseptic with
live steam (max temperature 150 °C at 3.8 bar) and with the machine stopped:
to do so, open the steam on/off tap without sending any water to the exchanger.
After sterilizing cool down the system by flowing the sterile condensate obtained
from steam condensation through the aseptic circuit.
This operation should be performed with the machine stopped to avoid
damaging irreparably the seal packings of the plungers.
The machine’s product circuit can be sterilized using live steam or pressurized
water, with a maximum temperature of 150 °C and for maximum 30 minutes. To
avoid damaging the seal packings of the plungers and thus reduce their life, we
recommend that you stop the machine before sterilizing it or that you alternate 1
minute operation phases with 10 minute stops (in case of fixed flow rate/speed
machines), or with the lowest speed possible in case of operation with
frequency converter.
During the sterilizing phase the alarm for " HIGH CONDENSATE
TEMPERATURE" may go on: you may either exclude it or just switch it off.
2.13.2.2 REGULATING THE FLOW OF COOLING WATER
During operation, the cooling water on/off valve (whether manual or solenoid)
should remain open.
An additional manual valve on the outlet of the exchanger has been provided to
control the water flow and obtain sterile condensate at a temperature of 40 to
50°C. This has the extra advantage of helping reduce any waste of softened
water.
2.13.2.3 DESCALING AND WASHING
The use of water – even when softened - for steam condensation inevitably
produces some deposits of lime in the exchanger.
Whenever a reduced exchange power is noticed - evidenced by an insufficiently
cooled condensation - a descaling of the aseptic system is required.
It is impossible to predict the frequency of this operation, since the formation of
lime deposits depends largely on the hardness of the water available.
For more details on maintenance operations, see Section 4 - MAINTENANCE.
2C001E0C.DOC 2.13.3
To Next Page
Loading...
