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6.Maintenance
13
6.2.3.
Spare parts
To request spare parts, it is necessary to indicate the type of valve, the position and the description of the part which
can be found in the
Technical Specifications
chapter 8.
6.3.
CLEANING
The use of aggressive cleaning products such as caustic soda and nitric acid may cause burns
to the skin.
Use rubber gloves during the cleaning process.
Always use protective goggles.
6.3.1.
CIP (Clean-in-place) cleaning
If the valve is installed in a system provided with the CIP process, its disassembly will not be required.
Cleaning solutions for CIP processes.
Only use clear water (chlorine-free) to mix with the cleaning agents:
a) Alkaline solution:
1% by weight of caustic soda (NaOH) at 70ºC (150ºF)
1 Kg NaOH + 100 l. of water = cleaning solution
or
2.2 l. 33% NaOH + 100 l. of water = cleaning solution
b) Acid solution:
0.5% by weight of nitric acid (HNO
3
) at 70ºC (150ºF)
or
0.7 litres HNO
3
at 53% + 100 l. of water = cleaning solution
Check the concentration of cleaning solutions; this may cause the deterioration of the seals
within the valve.
To remove any remains of cleaning products, ALWAYS perform a final rinse with clean water on completion of the
cleaning process.
Before beginning the disassembly and assembly work, clean the valve inside as well as
outside.
6.3.2.
Automatic SIP (sterilization-in-place)
The steam-sterilisation process is applied to all equipment.
DO NOT operate the equipment during the steam-sterilization process.
The parts/materials will not suffer damage provided the instructions set out in this manual are followed.
Cold liquid cannot be introduced until the equipment temperature is below 60
o
C (140
o
F).
Maximum conditions during the steam or superheated-water SIP process
a)
Max. temperature:
140°C / 284°F
b)
Max. time:
30 mins
d)
Cooling:
Sterilised air or inert gas
c)
Materials:
EPDM / PTFE / VMQ
FPM (not recommended)
