GEA Aseptomag GD, Инструкция по эксплуатации

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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 using:
•
Hot water at max. 160 °C (320 °F) for 20 to 30 min
• 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 sterilisation is
mandatory. Steam sterilisation 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 sterilisation:
• Medium: saturated steam or hot water
• Temperature: >121 °C (250 °F)
• Holding time: 20 … 30 min
The valve must be brought to the closed position for a brief period
(min. 5 seconds) immediately after sterilisation with steam. During
commissioning, regularly check all sealing points for leaks. Replace
defective seals and repeat the sterilisation 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
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30 03.01.2018