Overview of a Primary Product
Features
I
Heavy
duty cast
bronze
or forged
brass
body
I
Forged brass
cover,
union
nut and
tailpiece
I
Corrosion
resistant
seat and
plug
with option
of
stainless
steel
I
Allworking
parts
factory calibrated
within
"Cage
Unit"
ensuring
absolute
uniformity
of
performance
f
100%
factory tested
under
live
steam &
condensate.
I
Available
in angle, straightway
or
vertical
piping
patterns
|
,1r,,,
%"
and
1,,
pipe
sizes
I
Also available,
t7r"
inlet
x
%"
outlet
design.
Description
The
purpose
of a steam
trap
is to
prevent
steam
from
passing
its
point
of
use and
to allow condensate
to
be expelled
as
soon as
it forms.
Barnes
& Jones'thermostatic
steam
traps
perform
this function better
than any other
traps
available
today.
Ours
are
the only
factory
calibrated
thermostatic
steam traps;
a
claim
that
cannot
be matched
by
Dunham
Bush, Sarco,
Hoffman,
lllinois or
any other
manufacturer.
Calibration
ensures
that
each
of our
thermostatic
traps
snaps
shut to
steam and
opens
to condensate
with
a uniform
sensitivity
that
has been
proven
under live
steam
in
our
factory
test
facility.
You no longer
have
to
worry about
the iolerances
of individual
parts,
such as
the
"screw
in" seat,
lock
washers, element
and
cover
of other
traps.
lt is our
one
piece,
fully removable,
thermostatic
element,
the Cage
Unit, that
is
the
heart of our
trap.
The body
of the
trap
acts
merely as a
housing
for
the Cage
Unit,
which
performs
all
the
work.
Additionally,
testing
of this
element
can be
performed
out
of its original
trap body,
in
a test
body,
due to
its stand
alone,
calibrated
construction,
thereby
eliminating
the
need to take
the
trap off
line for
testing
or
repair and
greatly
simplifying
your
preventive
maintenance
program.
Operation
Using
a diaphragm
or bellows,
within
which is a
volatile
liquid, sealed
under
vacuum,
the trap
opens
and
closes
in a modulating
manner
dependent
upon
the
temperature
affecting
it. The trap's
normal state
is
that
of being
wide open
to
expel air
and
condensate.
When surrounded
by steam
at saturated
temperature,
the
volatile
fill
has flashed,
creating an
internal
pressure
equal
to the
surrounding
pressure.
This equalization
of
pressures
allows
the bellows
to expand
to
its natural
length or
"closed"
position,
preventing
steam
from
passing.
The
presence
of condensate
sufficiently
cools
the bellows
to condense
the vapor
within. Once
again
the
external
pressure
is
greater
and the
bellows
reverts
back to its
contracted,
or
"open" position,
allowing
the condensate
to drain
from the trap,
permitting
more steam
to
enter the
radiator
and thus,
the
modulating
action
of the
trap.
-Adaptations
of the
"Cage
Unit"
are available
to
renew all
manufacturers'thermostatic
steam
traps. Call
for
"Steam
Trap Repair
Guide."
v
tx
ts!_g_e]izzz
"Cage
Unit"
lnterior*
TSTLM93
91
Pacella
Park
Drive
.
Randolph,
MA 02368
.
TEL 7S1-96t-8000
*