1. Mostly importantly make sure that the
filter is isolated. Double blocking and
spade blinding is required when any hot
work is desired to be carried out on the
filter. Spading is recommended where
process flammable fluids are employed.
2. Drain out any hydrocarbon to the
close system.
3. Open the vent and air purge to the
atmosphere. However, flammables are to
be flared until no traces are notice when
work or entry is required.
4. Open the man ways and authorize
entry when its safety is guaranteed.
These are only some of the basic
maintenance preparation requirement
for process filters found in diverse use.
C onclusion
Different types of filters are installed in
various locations of process plants which
can be small in size like the instrument air
filters, average in size like the flush filters
and the lube oil filters, or large enough
like the sand filters and rotary vacuum
filters.
A very good thinking is to discover the
operating procedure of each of them that
is characteristically different. However,
operators need not to border about filter
maintenance as filters basic maintenance
requirement is cleaning or replacement
of the bulk media.
Filter efficiency is very important. This
reduces the rate of cleaning as well as
the frequency of switching of filters
assembled in parallel during operations.