Weir Warman 650 M200-MCR-G, Руководство пользователя, Страница: 265 / 287

fluidtech
double filter 4.225
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P.O. Box 1248
·
41846 Wassenberg • Phone +49/2432/96600 • FAX +49/2432/966090
9
6 Service and Maintenance
6.1 Replacing the filter elements
As a result of clogging of the filter elements during operation, the filter pressure drop in-
creases over time. Our differential pressure indicators “deltaP®” type series 5.01 or 5.02 pro-
vide for easy and reliable monitoring.
When an installation-specific differential pressure is reached (marked in the display of the
deltaP® indicator) the clogged filter element of the active chamber must be cleaned (section
6.2: Cleaning of filter elements). For this, the respective chamber must be put out of opera-
tion (change-over lever indicates active chamber, see schematic illustration printed on type
plate)
The filter is a pressure vessel and as such to be handled with precaution.
Activate the stand-by chamber:
•
first, slowly turn the change-over lever from one stop position to the other
•
then, remove air from the chamber if necessary: open vent plug (loosen a few turns)
until fluid starts leaking, then close (tighten) it again.
The chamber put out of operation must be emptied completely by first opening the vent plug
(loosen a few turns – this ensures the chamber gets depressurised) and then opening the
drain plug. Use a vessel with sufficient capacity to collect the discharged fluid.
Using this discharge procedure, a carryover of polluted fluid from the “dirty” chamber to the
clean part of the filter is avoided. Such polluted fluid contains high amounts of filtered out
particles. Generally, contamination of the clean side must strictly be avoided.
The filter hood can be taken off after the 4 hexagon nuts have been unscrewed. The filter
element can then be dismounted from its fit, cleaned and re-inserted or replaced by another
clean element (see also section 6.3: Maintenance). Thereafter, the chamber can be closed
again and remains in stand-by operation.
Never remount an empty filter hood – always insert a clean, ready-for-operation fil-
ter element!
Otherwise, the empty chamber could accidentally be activated, letting the fluid pass without
filtration, so downstream system components can be damaged by dirt particles.
B 5922 EN 04.10
9/16