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Strai
g
ht Thermocou ple
Assembli$ffp:
Ceramic Protection
Tubeg
-"7
Easy
to
Order-
1
-
State quantity
2 -
Specify
the
part number
(ours
or
competitive)
3 -
Specify
the
length
.
multiples
of 6" (152.4
mm)
are
stocked
4
-
Add
letters
for
mounting attachments
5
-
For Double
Element
Assembly add
D
to
the
to the
part number.
(1
4K4D-P11
F-12)
Example:
The part number describes the thermocouple
giving
the
gauge,
type
of wire, construction,
tube
length
and
mounting
device,
if
any.
The
part num-
ber
8K4-P11F-24 signifies
an
8
gauge, Type
K
complete assembly,
11116" OD
Mullite
tube,24"
long,
a
112"
x3l4"
steel fitting, and
a
screw cover
head.
Other
combinations
of
thermocouples and tubes
can be
specified depending
on
your
application.
I
Ngre:
tf
you
would tike to order
a
Type
E,
J, or
Type
N
asse
mbly, iust
substitute
the
K
with
a
E,
J, or
N
in
the
part numbers listed on
this page.
Mullite
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.
3/8"
(9.Smm)
3/8"
NPT steel hex
nipple 1
112" long
.
With
pl4
3!q_Jggk
14
14K4-PO6HXPJ.K3-*
Mullite Porcelain
63.5
% Aluminum Oxide, balance
Silicon
Dioxide
Construction-
2
Single
tube,
O.D.11116" (17.5mm)
112"
x314"
NPT steel fitting.
I
14
8K4-P11F-*
14K4-P11F-*
Mullite Porcelain
63.5
% Aluminum Oxide, balance
Silicon
Dioxide
Construction-
3
Single
tube,
O.D
.
11116)
(17.5mm
314"
NPT steel
nipple
2112"
long
8
14
8K4-P11 N-
14K4-P11
N
Mullite
Porcelain
63.5
% Aluminum Oxide, balance
Silicon
Dioxide
Construction-
Single tube,
O.D
.11116" (17.5mm) with alloy
sleeve
4
314"
NPT alloy
600
nipPle sleeve
Specify sleeve length
(Z)
8
14
gK4-P11 Ng-Z-.
14K4-P11Ng-Z-.
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-
5
Single tube,
O.D. 1
314"
(a4.Smm)
2.0"
NPT Machined
Steel
Bushing.
8
14
gK4-SCB-.
14K4-SCB-*
Silicon
Carbide
90.0%
Silicon
Carbide,
9"/"
Silicon
Dioxide
Construction-
6
Single
tube,
lsopressed over
a
112"
steel pipe.
O.D.
2.0"
(50.8mm).
8
14
8K4-SC112-
14K4-SCt12
Silicon
Garbide
90.0%
Silicon Carbide
,
9o/o
Silicon
Dioxide
Construction-
C,
Single tube, lsopressed over
a
314"
steel pipe.
O.D.
2.0"
(50.8mm)
8
14
8K4-SCl34-*
14K4-SCl34-.
Silicon
Carbide
90.0%
Silicon
Carbide,
9o/"
Silicon
Dioxide
Construction-
7
Single tube,
O.D. 1
314"
(aa.Smm)
FSC1216 cast
lron
fitting with stainless steel
scEq9.
8
14
8K4-SCP-
14K4-SCP
- Add
the required thermocouple length (-) as the
suffix
Multiples of
6"
(152.4mm) are in stock.
Page
16