Bardiani Valvole VVF Series, Instruction, Use And Maintenance Manual, Page: 15 / 81

15
8 Cleaning
EN-IST-VVF-1220
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.
CAUTION!
Burns hazard. The valves and piping may be very hot. Wear protective
gloves
WARNING
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.
EXAMPLE OF INTERNAL WASHING CYCLE (CIP)
Phases Temperature °C Washing product
Initial rinse Environment Chlorine- and chloride-free
water
Washing 70 °C Caustic soda (NaOH) at 1%
Intermediate rinse Environment Chlorine- and chloride-free
water
Washing 70 °C Nitric acid (HNO3) at 0.5%
End rinse Environment Chlorine- and chloride-free
water
Recommended washing product velocity = 2m/s
8 CLEANING
Risk of
stainless
steel
corrosion
Risk of damage
elastomers