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CORROSION PROTECTION

It is the constant contact with salt water and salty atmospheres which requires the use of
components with enhanced corrosion protection.
The ranges of the materials used allow appropriate anti-corrosion protection of the
external parts of the valve.

K8: 500 -1000 H SALT SPRAY TEST
All external elements on the valve which are in contact with 3 1 1
the environment are surface-treated with a zinc-nickel coating
or are made of stainless materials. Control knobs and partially
knurled nuts are made of plastic.
K8 will increasingly become the normal standard in the future.
Only the valve flange bodies are painted and the screws zinc
coated.

1 5 1 1

K9: > 1000 H SALT SPRAY TEST
All external elements, apart from the solenoids, are made of 3 1 1
stainless materials. Stainless, acid-resistant AISI 316L high-
grade steels are used if feasable. The solenoids are zinc-nickel
coated.

1 4 2 2

K10: > 1000 H SALT SPRAY TEST
All extermal elements are made of stainless materials or 3 2 1
coated with stainless materials. Stainless, acid-resistant AISI
316L high-grade steels are used if feasable.

2 4 2 2

Pos Corrosion protection
1 Zinc-nickel coated
2 Stainless steel AISI 316L
3 Nickel coated brass
* The salt spray test exposes the valve to a salt spray with a 4 Stainless steel screws
five percent NaCl solution in accordance with ISO 9227. The Zinc coated screws
number of hours it takes for red rust to appear is measured. 5

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