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Page 11
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Inlet/exhaust filter
A735-01-840 Issue B
4.4.3
Inspection and replacement of the element
CAUTION
At high temperature (in excess of 250 ºC) tip seal wear product will begin to decompose, giving rise to gaseous
fumes which can produce unpleasant symptoms.
The filter may be contaminated with the process chemicals that have been pumped during operation. Ensure that
the pump is decontaminated before maintenance and that adequate precautions are taken to protect people from
the effects of dangerous substances if contamination has occurred.
Renewal of the element is recommended regardless of the level of contamination. If the element is heavily
contaminated with tip-seal dust it must be replaced or cleaned in order to avoid a build up of dust that may adversely
affect the pump performance. Rinse the element if necessary with lukewarm water and mild detergent. Observe local
guidelines to advise the safe disposal of PTFE dust.
Fitting the new element is the reverse of removal.
WARNING
Take all necessary precautions if toxic or dangerous substances have been pumped. Wear PPE
when handling contaminated filters and filter elements.
Table 6 - NW25/NW40 filter element replacement kit
Product description
Ordering information
5 micron element
A505-97-802
1 micron element
A505-97-803
