KIESELMANN GmbH | Operating instruction
Commissioning, service and maintenance | 6
4x3x_TWBV_EN
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6.2 Service
RECOMMENDATION
Replacement of seals
To achieve optimal maintenance cycles, the following points must be observed!
–
When replacement of seals, all product-contacting seals should be replaced.
–
Only original spare parts may be installed.
Maintenance interval
The maintenance intervals depend on the operating conditions "temperature, temperature-intervals,
medium, cleaning medium, pressure and opening frequency". We recommend replacing the seals 2-
year cycle.The user, however should establish appropriate maintenance intervals according to the
condition of the seals.
Lubricant recommendation
EPDM; HNBR; NBR; FKM; k-flex
- Klüber Paraliq GTE703*
Silicone
- Klüber Sintheso pro AA2*
Thread
- Interflon Food*
*) It is only permitted to use approved lubricants, if the respective fitting is used for the produc-
tion of food or drink. Please observe the relevant safety data sheets of the manufacturers of lub-
ricants.
6.3 Cleaning
In order to ensure continuous flawless function during operation, the surfaces between the valve
body and the ball must be cleaned.
Open and close the valve several times from the open position. With an angle of rotation of
≥
20°,
cleaning fluid flows into the area between the ball and casing. A time-dependent actuation in the
angle of rotation range 20°-45° makes the cleaning process more efficient. The duration and the
number of actuations should be adjusted according to the type of dirtying and the degree of dirty-
ing.
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