GEA Aseptomag AV, Translation From The Original Operating Manual

Page: 29 / 72

9 Cleaning
9.1 Cleaning
The valve is suitable for CIP (Cleaning in Place); recommended cleaning speed
in the valve is at least 2 m/s.
All parts in contact with product must be cleaned at regular intervals. Always
observe the safety data sheets issued by the cleaning agent manufacturers. Only
use cleaning agents which do not cause damage to the seals and the inner parts
of the valve. When the pipe is cleaned, the cleaning medium also flows through
and cleans the valve housings.
With respect to the cleaning method and parameters like detergents,
temperatures, times, and intervals, the component manufacturer can merely
make recommendations but cannot provide any generally applicable details.
Method and parameters should be determined and defined by the operator in
accordance with the relevant process and product.
The cleaning effect must be checked regularly by the operator!
9.2 Sterilisation
The valve is suitable for SIP sterilisation (sterilisation in place). The following data
applies for valves equipped with TEFASEP
®
and silicone sealing materials.
Sterilisation is possible with:
• Hot water, max. 160 °C (320 °F)
•
Steam at max. 160 °C (320 °F) for 20 to 30 min
• Chemicals (e.g. H
2
O
2
)
Hint!
When TEFASEP
®
valve seat seals are used, hot sterilization is
mandatory. Steam sterilization allows the seal to be perfectly fitted
into the valve seat, thus ensuring optimum sealing against the
maximum closing pressure specified.
Operating conditions for steam sterilization:
•
Medium: saturated steam
• Temperature: >121 °C (250 °F)
• Holding time: 20 … 30 min
The valve must be placed in the closed position immediately after
steam sterilization for a short period (minimum 5 seconds). During
commissioning, regularly check all sealing points for leaks. Replace
defective seals and repeat the sterilization process.
9.3 Passivation
Before commissioning a plant, passivation is commonly carried out for long pipes
and tanks. Valve blocks are usually excepted from this.
Passivation is typically performed using nitric acid (HNO
3
) at approx. 80 °C (176
°F) at a concentration of 3 % and a contact time of 6 to 8 hours.
Cleaning
Cleaning
430BAL011547EN_2
08.07.2019 29