Operators manual
© 2017 Honeywell International Inc.
Operators manual underground gas pressure reducing station
Type: COCON 13
Page 9
The
hinged
pit
lid
cover
(10)
is
fitted
with
a
stainless
latch
that
is
securely
plugged
for
the
prevention
of
unauthorized
entry.
An
isolating
ball
valve
(09)
is
mounted
to
the
inlet
of
the
casing.
When
this
ball
valve
is
open,
its
handle
prevents
removal
of
the
Plexiglas
cover.
A
dust
filter
(07)
is
connected
under
the
cartridge.
The
gas
then
passes
through
a
safety
shut
‐
off
device
upstream
of
the
regulator
within
the
modular
cartridge:
‐
The
device
consists
of
a
ssd
valve
(06)
and
a
ssd
controller
(03).
The
controller
sits
on
top
of
the
cartridge.
If
the
regulator
fails
in
the
open
position,
the
relay
will
detect
an
increase
in
line
pressure
and
release
the
spring
‐
loaded
valve,
cutting
off
the
gas
supply.
It
is
also
fitted
with
a
manual
emergency
release
button.
Gas
pressure
reduction
is
achieved
by
a
pilot
operated,
diaphragm
regulator
(05).
The
required
outlet
pressure
is
set
and
controlled
with
the
pilot.
A
valve
(11)
is
attached
to
the
outlet
flange.
The
valve
can
be
operated
without
removing
the
cover
of
the
casing.
However,
as
a
safety
feature,
if
this
valve
is
open,
then
it
is
not
possible
to
remove
this
Plexiglas
cover.
The
installation
of
a
relief
valve
is
an
option.
Transducers
can
be
installed
in
the
protection
of
the
enclosed
space,
for
the
remote
measurement
of
pressures.
Close
indication
of
the
slam
shut
valve
by
means
of
a
proximity
switch
is
also
available.
The
station
is
fitted
with
two
pressure
gauges
which
read
the
inlet
and
outlet
pressures.
These
gauges
are
situated
under
the
protection
of
the
Plexiglas
cover
but
are
visible
when
the
pit
lid
cover
is
opened.
Purge
valves
for
depressurization
of
the
unit
are
mounted
on
the
cartridge.
A
handle
is
attached
to
the
cartridge,
so
the
cartridge
can
be
easily
removed
from
the
casing.
