Ceramic Thermocouple Protection Tubes
PTRA
/ PTRM
Typical
Physical Properties
|
Properties
|
OMEGATITE®450
|
OMEGATITE®300
|
|
Composition
|
99.8%
Al2O3
|
85%
Mullite - 15% Glass
|
|
Water
Absorption
|
0.00
|
0.00
|
|
Specific Gravity KP/CM3
|
3.85
|
2.8
|
|
Gas
Permeability
|
Gas
Tight
|
Gas
Tight
|
|
Compressive
Strength (psi)
|
>30,000
|
>190,000
|
| Tensile
Strength (psi) |
30,000
|
18,000
|
|
Transverse
Strength (psi)
|
55,000
|
27,000
|
|
Coefficient
of Linear Thermal Expansion
|
|
24 to 250°C (75 to 480°F)
24 to 500°C (75 to 930°F)
24 to 1000°C (75 to 1830°F)
24 to 1500°C (75 to 2730°F)
|
6.2
x 10-6
7.4 x 10-6
8.5 x 10-6
9.8 x 10-6
|
3.3
x 10-6
4.0 x 10-6
5.0 x 10-6
-
|
|
Approximate
Thermal Conductivity (BTU)(in)(hr)(ft2)(°F)
|
|
24°C (75°F)
100°C (1470°F)
|
230
60
|
40
25
|
|
Maximum
Service Temperature
|
1950°C
(3540°F)
|
1750° (3180°F)
|
|
Dielectic Constant (1MC)
|
9.29
|
5.80
|
|
Dielectic
Strength (volts/mil)
|
>230
|
250
|
|
Volume
Resistively (ohm cm)
|
1013
|
1013
|
|
Te
Value (Volume Resistively of 1 MΩ cm)
|
800°C (1470°F)
|
800°C (1470°F)
|
|
Hardness (Mohs Scale)
|
9
|
7.5
|
|
Fabrication Methods
|
Cast
|
Cast
|
Tolerance:
±5%
Typical Chemical Analyses
| - |
Al2O3
|
SiO2
|
MgO
|
Na2O
|
CaO
|
Fel2O3
|
Cr2O3
|
TiO2
|
MnO
|
ZrO2
|
K2O
|
|
OMEGATITE®450
|
99.8
|
.070
|
.050
|
.005
|
.030
|
.025
|
<.003
|
.004
|
.001
|
-
|
<.001
|
|
OMEGATITE®300
|
60.0
|
38.0
|
.2
|
.2
|
.1
|
.5
|
-
|
.5
|
-
|
-
|
.700
|
Ceramic Thermocouple Protection Tubes
|
Dimensions
|
PTRA
OMEGATITE® 450
|
PTRM
OMEGATITE® 300
|
|
Inside
Dia.
|
Outside
Dia.
|
Tube
Length *
|
Model
Number
|
Model
Number
|
|
1/16"
|
1/6"
|
12"
|
PTRA-11618-12
|
PTRM-11618-12
|
|
18"
|
PTRA-11618-18
|
PTRM-11618-18
|
|
24"
|
PTRA-11618-24
|
PTRM-11618-24
|
|
5/64"
|
5/32"
|
12"
|
PTRA-564632-12
|
PTRM-564632-12
|
|
18"
|
PTRA-564632-18
|
PTRM-564632-18
|
|
24"
|
PTRA-564632-24
|
PTRM-564632-24
|
|
5/32"
|
1/4"
|
12"
|
PTRA-53214-12
|
PTRM-53214-12
|
|
18"
|
PTRA-53214-18
|
PTRM-53214-18
|
|
24"
|
PTRA-53214-24
|
PTRM-53214-24
|
|
3/16"
|
1/4"
|
12"
|
PTRA-31614-12
|
PTRM-31614-12
|
|
18"
|
PTRA-31614-18
|
PTRM-31614-18
|
|
24"
|
PTRA-31614-24
|
PTRM-31614-24
|
|
3/16"
|
5/16"
|
12"
|
PTRA-316516-12
|
PTRM-316516-12
|
|
18"
|
PTRA-316516-18
|
PTRM-316516-18
|
|
24"
|
PTRA-316516-24
|
PTRM-316516-24
|
|
1/4"
|
3/8"
|
12"
|
PTRA-1438-12
|
PTRM-1438-12
|
|
18"
|
PTRA-1438-18
|
PTRM-1438-18
|
|
24"
|
PTRA-1438-24
|
PTRM-1438-24
|
|
5/16"
|
7/16"
|
12"
|
PTRA-516716-12
|
PTRM-516716-12
|
|
18"
|
PTRA-516716-18
|
PTRM-516716-18
|
|
24"
|
PTRA-516716-24
|
PTRM-516716-24
|
|
5/16"
|
1/2"
|
12"
|
PTRA-51612-12
|
PTRM-51612-12
|
|
18"
|
PTRA-51612-18
|
PTRM-51612-18
|
|
24"
|
PTRA-51612-24
|
PTRM-51612-24
|
|
3/8"
|
1/2"
|
12"
|
PTRA-3812-12
|
PTRM-3812-12
|
|
18"
|
PTRA-3812-18
|
PTRM-3812-18
|
|
24"
|
PTRA-3812-24
|
PTRM-3812-24
|
|
7/16"
|
11/16"
|
12"
|
PTRA-7161116-12
|
PTRM-7161116-12
|
|
18"
|
PTRA-7161116-18
|
PTRM-7161116-18
|
|
24"
|
PTRA-7161116-24
|
PTRM-7161116-24
|
|
1/2"
|
3/4"
|
12"
|
PTRA-1234-12
|
PTRM-1234-12
|
|
18"
|
PTRA-1234-18
|
PTRM-1234-18
|
|
24"
|
PTRA-1234-24
|
PTRM-1234-24
|
|
5/8"
|
7/8"
|
12"
|
PTRA-5878-12
|
PTRM-5878-12
|
|
18"
|
PTRA-5878-18
|
PTRM-5878-18
|
|
24"
|
PTRA-5878-24
|
PTRM-5878-24
|
|
3/4"
|
1"
|
12"
|
PTRA-341-12
|
PTRM-341-12
|
|
18"
|
PTRA-341-18
|
PTRM-341-18
|
|
24"
|
PTRA-341-24
|
PTRM-1341-24
|
|
7/8"
|
1 1/16"
|
12"
|
PTRA-78118-12
|
PTRM-78118-12
|
|
18"
|
PTRA-78118-18
|
PTRM-78118-18
|
|
24"
|
PTRA-78118-24
|
PTRM-78118-24
|
|
1"
|
1 1/4"
|
12"
|
PTRA-1114-12
|
PTRM-1114-12
|
|
18"
|
PTRA-1114-18
|
PTRM-1114-18
|
|
24"
|
PTRA-1114-24
|
PTRM-1114-24
|
|
5 mm
|
7 mm
|
12"
|
PTRA-5MM7MM-12
|
PTRM-5MM7MM-12
|
|
18"
|
PTRA-5MM7MM-18
|
PTRM-5MM7MM-18
|
|
24"
|
PTRA-5MM7MM-24
|
PTRM-5MM7MM-24
|
*Length:
The Tube lengths shown are lengths for a tube without any fittings.
Special lengths are also available. Consult Sales.
|
 |
|
|
|
† All dollar amounts on this site are shown in US currency.
Note: Fittings may be ordered by contacting our sales department. When ordering tube with fitting, specify the fitting number (1, 2, 3) after the model number.
1. 1/2" x 1/2" NPT: Fits tubes from 6.0 to 12.5 mm (1/4" to 1/2") O.D.
2. 1/2" x 3/4" NPT: Fits tubes from 8.0 to 19.0 mm (3/8" to 3/4") O.D.
3. 7/8" x 27NS Brass Ferrule 50 mm (2") long: Fits tubes from 17.5 mm (11/16") O.D. tubes ONLY.
For tube with any of the above fittings add $30 to the price of the tube.
Ordering Example: (1) PTRA-11618-12 standard tube, 12" length, 1/8" OD, 1/16" ID, with no fitting = $27
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Part Number Builder |
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Option Descriptions
|
|
(1)
|
Model
|
| |
Select
PTRA for OMEGATITE® 450
PTRM for OMEGATITE® 300
|
(2)
|
Inside Diameter
|
| |
Select
564 for 5/64 in.
532 for 5/32 in.
116 for 1/16 in.
316 for 3/16 in.
516 for 5/16 in.
716 for 7/16 in.
38 for 3/8 in.
58 for 5/8 in.
78 for 7/8 in.
14 for 1/4 in.
34 for 3/4 in.
12 for 1/2 in.
1 for 1 in.
5MM for 5 mm
|
(3)
|
Outside Diameter
|
| |
Select
532 for 5/32 in.
516 for 5/16 in.
716 for 7/16 in.
1116 for 11/16 in.
18 for 1/8 in.
38 for 3/8 in.
78 for 7/8 in.
14 for 1/4 in.
34 for 3/4 in.
12 for 1/2 in.
1 for 1 in.
118 for 1 1/8 in.
114 for 1 1/4 in.
7MM for 7 mm
|
(4)
|
Tube Length
|
| |
Select
12 for 12 in.
18 for 18 in.
24 for 24 in.
|
(5)
|
Optional Fittings
|
| |
Select
Nothing(leave field blank) for no fitting (standard)
-1 for 1/2 x 1/2 NPT (fits 1/4 to 1/2" OD)
-2 for 1/2 x 3/4 NPT (fits 3/8 to 3/4" OD)
-3 for 7/8 x 27NS brass ferrule (fits 11/16 to 1/4" OD)
|
| NOTE: All combinations may not be valid, check spec sheet for valid part numbers. |
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