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8
Cleaning
8 Cleaning
1. VALVE CLEANING WITH DETERGENTS:
The system in which the valve is installed must be cleaned by expert
personnel in observance of the following:
- Abide by the indicated detergent concentration values;
- Observe the instructions provided by the detergent manufacturer.
- Always wear protective safety glasses and gloves.
IMPORTANT!
- Accurately dose detergents to avoid excessive concentration;
- Always rinse thoroughly with clean water after washing.
- Check compatibility of valve materials.
WARNING!
Burns hazard. The valves and piping may be very hot. Wear protective
gloves
CAUTION
After installing a new or serviced valve, perform an internal washing
cycle before using the piping for food liquids. If it there has been any
welding work, passivation treatment must be carried out.
Phases
Initial rinse
Washing
Intermediate rinse
Washing
End rinse
Recommended washing product velocity = 2m/s
28
EXAMPLE OF INTERNAL WASHING CYCLE (CIP)
Temperature °C
Environment
Environment
Environment
70 °C
70 °C
Risk of
stainless steel
corrosion
Risk of damage
elastomers
Washing product
Chlorine- and chloride-free
water
Caustic soda (NaOH) at 1%
Chlorine- and chloride-free
water
Nitric acid (HNO3) at 0.5%
Chlorine- and chloride-free
water
EN-IST-BBZK-0821
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