9
Cleaning
9.1
Cleaning
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. For further information on the resistance of the individual sealing
materials, see . The valve housings support flow-through and are cleaned during
the pipe cleaning.
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 operating company!
9.1.1
Cleaning Process Examples
Typical Cleaning Parameters in Dairy Operations
Example of a two-phase cleaning process:
•
Sodium hydroxide solution and sodium hydroxide based combination
products in concentrations from 0.5% to 2.5% at 75 °C (167 °F) to 80 °C (176
°F).
•
Phosphoric or nitric acid, and combination products based thereon in the
concentrations of 0.3 % to 1.5% at approx. 65 °C (149 °F).
Example of a cleaning operation in one cleaning step:
•
Formic acid and formic acid-based combination products at up to 85 °C (185
°F).
Typical Cleaning Parameters in Breweries
•
Sodium hydroxide solution and sodium hydroxide based combination
products in concentrations of 1% to 4% at about 85 °C (185 °F).
•
Phosphoric or nitric acid, and combination products based thereon in the
concentrations of 0.3 % to 1.5% at 20 °C (68 °F).
9.1.2
Cleaning effect
The cleaning effect depends on the following factors:
•
Temperature
•
Time
•
Mechanics
•
Chemicals
•
Degree of soiling
These factors can be combined in such a way as to make an optimal cleaning
result probable.
Cleaning
Cleaning
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Summary of Contents for D-tec D
Page 66: ...Fig 39 Maintenance Assembling the valve 430BAL013307EN_8 66 04 08 2022...
Page 69: ...Fig 41 Maintenance Assembling the valve 430BAL013307EN_8 04 08 2022 69...
Page 85: ...Fig 55 Housing Parts list D tec double chamber valve type D DV 430BAL013307EN_8 04 08 2022 85...
Page 91: ...Fig 58 hard seal Parts list D tec valve insert D DV SV NC NO 430BAL013307EN_8 04 08 2022 91...
Page 99: ...Fig 61 Dimension sheet double chamber valve type D DV 430BAL013307EN_8 04 08 2022 99...
Page 105: ...Appendix 430BAL013307EN_8 04 08 2022 105...
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