Omega Products PTRA-1114-24 User Manual

Ceramic Thermocouple
Protection
Tubes

Tube Length

For Metric Sizes

and Molten Metal

Applications,

See OMEGATITE

at omega.com

®

650

Tube Length

Tube Length for

Tube Length for

11

⁄

16

1

and

⁄

2

" or under

1

1

7

⁄

8

"

3

⁄

4

"

7

⁄

8

"

1

13

⁄

16

"

2

Open-end tubes
also available.

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) >300,000 >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) 6.2 x 10-6 3.3 x 10-6
24 to 500°C (75 to 930°F) 7.4 x 10-6 4.0 x 10-6
24 to 1000°C (75 to 1830°F) 8.5 x 10-6 5.0 x 10-6
24 to 1500°C (75 to 2730°F) 9.8 x 10-6 -

Approximate Thermal Conductivity
(BTU)(in)/(hr)(ft2)(°F)
24°C (75°F) 230 40
800°C (1470°F) 60 25

Maximum Service Temperature 1950°C (3540°F) 1750°C (3180°F)
Dielectric Constant (1MC) 9.29 5.80
Dielectric Strength (volts/mil) >230 250
Volume Resistivity (ohm cm) 1013 10
Te Value (Volume Resistivity of 1 mega Ω cm) 800°C (1470°F) 800°C (1470°F)
Hardness (Mohs Scale) 9 7.5
Fabrication Methods Cast Cast

13

Tube Length

2"

3

Typical Chemical Analyses

Al2O3 SiO2 MgO Na2O CaO Fe2O3 Cr2O3 TiO2 MnO ZrO2 K2O

OMEGATITE® 450 99.8 0.070 0.050 0.005 0.030 0.025 <.003 0.004 0.001 - <0.001
OMEGATITE® 300 60.0 38.0 0.2 0.2 0.1 0.5 - 0.5 - - 0.700

Note: All properties are average for test specimens. Tests were performed according to ASTM specifications.

A-139

Ceramic Thermocouple Protection Tubes

To Order Visit omega.com/ptra_ptrm for Pricing and Details

PTRA PTRM
Dimensions: inches OMEGATITE® 450 OMEGATITE® 300

Inside Outside
Diameter Diameter Tube Length* Model Number Model Number

12 PTRA-11618-12 PTRM-11618-12

1

⁄16

24 PTRA-11618-24 PTRM-11618-24
12 PTRA-564532-12 PTRM-564532-12

5

⁄64

24 PTRA-564532-24 PTRM-564532-24
12 PTRA-53214-12 PTRM-53214-12

5

⁄32

24 PTRA-53214-24 PTRM-53214-24
12 PTRA-31614-12 PTRM-31614-12

3

⁄16

24 PTRA-31614-24 PTRM-31614-24
12 PTRA-316516-12 PTRM-316516-12

3

⁄16

24 PTRA-316516-24 PTRM-316516-24
12 PTRA-1438-12 PTRM-1438-12

1

⁄4

24 PTRA-1438-24 PTRM-1438-24
12 PTRA-516716-12 PTRM-516716-12

5

⁄16

24 PTRA-516716-24 PTRM-516716-24
12 PTRA-51612-12 PTRM-51612-12

5

⁄16

24 PTRA-51612-24 PTRM-51612-24
12 PTRA-3812-12 PTRM-3812-12

3

⁄8

24 PTRA-3812-24 PTRM-3812-24
12 PTRA-7161116-12 PTRM-7161116-12

7

⁄16

24 PTRA-7161116-24 PTRM-7161116-24
12 PTRA-1234-12 PTRM-1234-12

1

⁄2

24 PTRA-1234-24 PTRM-1234-24
12 PTRA-5878-12 PTRM-5878-12

5

⁄8

24 PTRA-5878-24 PTRM-5878-24
12 PTRA-341-12 PTRM-341-12

3

⁄4 1 18 PTRA-341-18 PTRM-341-18

24 PTRA-341-24 PTRM-341-24
12 PTRA-78118-12 PTRM-78118-12

7

⁄8 1

24 PTRA-78118-24 PTRM-78118-24
12 PTRA-1114-12 PTRM-1114-12

1 1
24 PTRA-1114-24 PTRM-1114-24

300 mm PTRA-5MM7MM-12 PTRM-5MM7MM-12
5 mm 7 mm 450 mm PTRA-5MM7MM-18 PTRM-5MM7MM-18
600 mm PTRA-5MM7MM-24 PTRM-5MM7MM-24

Length: The tube lengths shown are standard lengths for a tube without any fittings. Special lengths are also available. Consult Sales.

*

Tolerance: ±5%. See omega.com for diagrams with fittings.

Important Ordering Notes

Fittings: When ordering tube with fitting specify the
fitting number (1, 2, 3) after the model number.

1⁄2 x 1⁄2" NPT: Fits tubes from 6.0 to 12.5 mm (1⁄4 to 1⁄2") OD

1.

1

2.

⁄2 x 3⁄4" NPT: Fits tubes from 8.0 to 19.0 mm (3⁄8 to 3⁄4") OD

7

3.

⁄8" x 27NS Brass Ferrule 50 mm (2") long: Fits tubes from 17.5 mm

(11⁄16") OD tubes to

Tube with any of the above fittings for an additional cost.

1

⁄8 18 PTRA-11618-18 PTRM-11618-18

5

⁄32 18 PTRA-564532-18 PTRM-564532-18

1

⁄4 18 PTRA-53214-18 PTRM-53214-18

1

⁄4 18 PTRA-31614-18 PTRM-31614-18

5

⁄16 18 PTRA-316516-18 PTRM-316516-18

3

⁄8 18 PTRA-1438-18 PTRM-1438-18

7

⁄16 18 PTRA-516716-18 PTRM-516716-18

1

⁄2 18 PTRA-51612-18 PTRM-51612-18

1

⁄2 18 PTRA-3812-18 PTRM-3812-18

11

⁄16 18 PTRA-7161116-18 PTRM-7161116-18

3

⁄4 18 PTRA-1234-18 PTRM-1234-18

7

⁄8 18 PTRA-5878-18 PTRM-5878-18

1

⁄8 18 PTRA-78118-18 PTRM-78118-18

1

⁄4 18 PTRA-1114-18 PTRM-1114-18

For Protection Tubes

with Custom Lengths or

Fittings Please Consult

Custom Engineering

Ordering Examples:
PTRM-11618-12, standard tube

with no fitting.
PTRM-11618-12-1, standard

1

⁄2 x 1⁄2" NPT fitting.

tube,

1

⁄4" OD

Discount Schedule

1 to 10 units ..........Net

11 to 24 units ........10%

25 to 100 units .......20%

101 to 500 units ......30%

Quantity discount applies to
like tubes. Other sizes,
materials, and configurations
by quotation.

A

A-140