Parker Hiross Hypercool WRN Benutzerhandbuch Seite 5

!
IMPORTANT
-Please note that stainless steel aftercoolers should not be
used with sea water. Static sea water is corrosive for stainless
steels and if the sea water is drained, allowing sea ambient air
to come into contact with the water side of stainless steel, cor-
rosion continues.
-Cupro Nickel aftercoolers can benefi t from being passifi ed
prior to use. Passivation is a one time operation achieved by
fl owing clean sea water, from open sea, for a minimum of three
days to create a protective fi lm on the metal surface. Note that
at low sea temperatures the protective fi lm takes longer to form.
Cupro Nickel alloys are sensitive to biological agents and pol-
lutants (sulphate reducing bacteria can produce sulphides that
can start corrosion and pitting) typically present in harbours,
ports and coastal waters and we recommend that for sea water
cooling of Cupro Nickel aftercoolers that there is constant water
fl ow through the aftercooler. If the Cupro Nickel aftercooler is
typically used on board vessels in port side water or dirty sea
water then we recommend fl ushing the aftercooler with clean
sea water as soon as the vessel leaves port and is in open wa-
ters as would occur if the water fl ow is constant as previously
recommended. If, however, the installation is permanently in
dirty water, for example a harbour installation or a fl oating sta-
tion, it is recommended to introduce a clean sea water fl ush
process or to install a secondary hydraulic circuit to ensure that
clean water is used through the aftercooler. Verify and clean the
aftercooler tube bundle at least quarterly.
-All water-cooled aftercoolers need to be protected against rust
or other solid particles entering the cooling water inlet of the
aftercooler. Avoid excessive water fl ow above 2-3 m/s which
can damage the compressed air/gas tubes at the water inlet
section.
- Avoid too leaving the water side drained of water. For remov-
able tube bundles do not use metallic brushes which can dam-
age the tubes.
English WRN/WRC/WRS/WRA/WRP 3