9.1.3
Cleaning the Leakage Cavity
Cleaning the leakage chamber of the double seat valve type K is not possible.
This valve is therefore primarily used in the CIP and gas area. The switching
leaks are discharged via the leakage pipe in the lantern.
9.2
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
Passivation
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Summary of Contents for VARIVENT K
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