16
7. Maintenance
(0) 2018/05
7.2.2.
Storage
Valves should be stored in an enclosed location under the following conditions:
Temperature from 15ºC to 30ºC
Ambient humidity < 60%
Equipment
MAY NOT
be stored outside.
7.2.3.
Spare parts
To order spare parts, you must indicate the valve type and the position and description of the part, as
found in chapter 8. Technical specifications.
7.3.
CLEANING
The use of aggressive cleaning products such as caustic soda and nitric acid may burn the
skin.
Wear rubber gloves during all cleaning procedures.
Always wear protective goggles.
7.3.1.
CIP (Clean-in-Place) cleaning
If the valve is installed in a system with a CIP process, its disassembly will not be required.
EPDM
is the
standard seal material that will be used for CIP cleaning, both in alkaline mediums and in acid mediums.
The other two options (
HNBR
,
FPM
) are not recommended.
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 H
2
O = cleaning solution
or
2,2 l of 33% NaOH + 100 l of H
2
O = cleaning solution
b) Acid solution:
0,5% by weight of nitric acid (HNO
3
) at 70ºC (150ºF)
0,7 l of 53% HNO
3
+ 100 l of H
2
O = cleaning solution
Check the concentration of the cleaning solutions; incorrect concentrations may lead to the
deterioration of the valve seals.
To remove any traces of cleaning products, ALWAYS perform a final rinse with clean water at the end of
the cleaning process.
Before starting disassembly and assembly tasks, clean the entire interior and exterior of the
valve.
