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Angle
Thermocouple
Assemblies
-
::
Ceramic
Tube
- TYPes
Bn
E,
J,
K,
N, R'&:'s
Example:
The
part
number 8K6-P11F-l8-24-SH signifies an
angle assembly,
S
gauge,
Type K,
lS"
Mullite
P11F
tube
hot
leg,
24,'long cold leg,
and
a standard
weatherproof
aluminum head. Other combinations of thermocouples
and
ceramic tubes
can
be
specified depending on
your
application.
Note: lf
you woutdiixe
a
oraer
a
Type E,
J,
or N,
angle
assembly, substitute the
K
with an
E,
J,
or N, in
the
paft
number.
lf
you would
Iike to order
a
Type
B,
R, or
S,
asiembty
substitute
the
K
with
a
B, R,
or
S, and a 24 for the
I
in
the
part
number.
We
also offer
other
types
ceramic
tubes,
such
as
Zirconia
or
Alumina.
See
the
ceramic
tube section
of
this
catatog
if
you
would
like
to specify a
different
type of
protection
tube on
your
assembly.
t
Mullite
Porcelain
Mullite has
a
maximum service temperature of
2900'F (1590'C).
lt
is
considered
to be
better
than
Alumina for thermal
shock resistance.
Mullite tubes
should
be
used with care, since they have poor
mechanical
shock resistance.
Secondary metal
tubes can
be added for
protection from mechanical
damage.
Mullite tubes
are considered
gas tight at
high
temperatures.
All tubes which
are
used
in
horizontal installations and at elevated temperatures
should
be supported.
Mullite tubes should not
be
used
for
primary protection tubes on noble metal
(plati
num based) thermocouples.
Mullite
Porcelain
63.5 % Aluminum Oxide, balance
Silicon
Dioxide
Construction-
Single
tube,
O.D.11116" (17.5mm)
112"
xgl4"
NPT steel fitting.
8
8K6-P11F.H.C.SH
Silicon
Carbide
Silicon
Carbide
has
a
maximum service
temperature
of 2730"F
(1500"C).
lt
has excellent
resistance to thermal shock and the cutting action of
flames.
However, silicon
carbide
tubes
are
porous
so they should not
be
used if
a
gas tight
seal
is
required
for
protection of the thermocouple element.
Because of their porousity, silicon
carbide is
usually
used
as
secondary thermocouple protection
tube.
The SCI
Vpe
silicon
carbide
tubes
are
isopressed
around
a
steel inner protection
tube.
This creates
a
gas tight
unit,
which is then
considered a
non-
porous
tube.
Silicon
Carbide
90.0%
Silicon
Carbide
,
9o/"
Silicon
Dioxide
Construction-
Single tube,
O.D.1
314"
(44.5mm)
2.O"
NPT Machined
Steel
Bushing.
8
8K6.SCB.H.C-SH
Silicon
Carbide
90.0%
Silicon
Carbide
,
9"/"
Silicon
Dioxide
Construction-
Single
tube,
lsopressed over
a
112"
steel pipe.
O.D.
2.0"
(50.8mm).
8
8K6-SC112-H-C-SH
Silicon
Carbide
90.0%
Silicon
Carbide
,
9"/"
Silicon
Dioxide
Construction-
Single
tube,
lsopressed over
a
314"
steel pipe.
O.D.
2.0"
(50.8mm)
_
B
8K6-SCl34-H-C-SH
Silicon
Garbide
90.0%
Silicon
Carbide
,
9o/"
Silicon
Dioxide
Construction-
Single tube,
O.D.1
314"
(44.5mm)
FSC
1216
cast
lron
fitting with stainless steel screws.
8
8K6.SCP.H.C-SH
Alumina
Silica
Slip cast Alumina
Silica
refractory tubes have
a
maximum service temperature
of 1500"F (815'C).
These tubes
are
constructed by casting
the
refractory material around
a
1/2" steel protection
tube.
Alumina
Silica
refractory tubes
are
used
in
molten Zinc and Aluminum
die
casting applications.
Alumina
Silica
tubes have excellent thermal shock
and mechanical
damage
resistance
.
They are
non-wetting and will
not
contaminate the molten
metal
as a
stainless steel
or
iron protection
tube.
Alumina Silica
SliP Cast
41
.3%
Silicon
Dioxide,39.4"/o Aluminum Oxide,
9.4% Calcium
6.3%
lron
Oxide,3.8"h
Other
Construction-
Single tube, O.D.
2"
(50.Bmm)
Cast
over
a
112"
steel protection
tube.
Note:
lf
you would like to order
a 316
stainless steel
inner protection tube, substitute the
AS
with
ASSS
in the
part
number.
8
8
8K6.AS.H-C-SH
SK6.ASSS-H-C-SH
Hot
leS
of
thermocoupb =
H
Cold
leg of thermocouple =
C
Multiples of
6"
(152.4mm)
are
in stock.
Note: The steel balance
pipe
on
q/pe B,
R,
and S, assemblies
are
1/2"
pipe
size'
Page
66