Operators manual
© 2017 Honeywell International Inc.
Operators manual underground gas pressure reducing station
Type: HON COCON 13
Page 27
4.6
‐
Shutting
down
and
removal
of
the
cartridge
This
paragraph
describes
the
shutting
down
of
the
cartridge's
operations
and
the
removal
of
the
cartridge,
for
maintenance
or
correcting
malfunctions.
-
Close
the
valves
attached
in
the
supply
and
discharge
pipe,
located
within
5
meters
of
the
station
(block
valves).
-
Open
the
pit
cover
with
the
special
key
supplied.
-
Close
the
isolating
ball
valve
in
the
inlet.
-
Close
the
isolation
valve
4”
in
the
outlet.
-
Open
the
purge
valves.
-
Wait
until
the
pressure
gauge,
which
shows
the
inlet
pressure,
indicates
"0".
‐
Wait
until
the
pressure
gauge,
which
shows
the
outlet
pressure,
indicates
"0".
All
handles
are
now
turned
away
from
the
cover.
To
remove
the
cartridge,
proceed
as
follows:
-
Open
the
casing
cover.
-
Loosen
the
4
x
M16/M24
nuts
‐
Lift
the
cartridge
from
the
casing
by
the
handles.
Remark:
Take
care
of
your
back
by
following
proper
lifting
procedures,
while
installing
and
removing
the
cartridge.
See
paragraph
4.6
for
the
installation
of
a
spare
cartridge.
4.7
‐
Replacing
parts
The
following
paragraphs
describe
the
replacement
of
a
number
of
parts
in
the
cartridge.
The
following
parts
can
be
replaced
on
site,
by
the
operator.
-
The
upper
seal
ring
between
the
cartridge
and
casing
(paragraph
4.7.1);
-
The
two
lower
seal
rings
between
the
cartridge
and
casing
(paragraph
4.7.2);
-
Dust
filter
(paragraph
4.7.3).
The
seal
rings
have
to
be
replaced
in
case
of
a
leakage.
The
dust
filter
has
to
be
replaced
when
the
pressure
loss
over
the
filter
is
not
acceptable.
The
remaining
parts
must
be
replaced
by
a
qualified
maintenance
engineer
in
the
service
workshop.
Paragraph
4.6
describes
how
to
remove
the
cartridge
from
its
casing.
