PTRA-11618-12 OMEGA | Alldatasheet
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Technical content
Al2O3 SiO 2 MgO Na2O CaO Fe2O3 Cr 2O3 TiO 2 MnO ZrO 2 K 2O 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)(ft 2)(°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 13 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 Typical Chemical Analyses Note: All properties are average for test specimens. Tests were performed according to ASTM specifications. Tube Length Tube Length for ⁄16 and 3⁄4" Tube Length Open-end tubes also available. ⁄8" Tube Length for 1⁄2" or under 113 ⁄16 For Metric Sizes and Molten Metal Applications, See OMEGATITE ® 650 at omega.com Tube Length ⁄8"
A A-140 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 1⁄8 18 PTRA-11618-18 PTRM-11618-18
24 PTRA-11618-24 PTRM-11618-24
12 PTRA-564532-12 PTRM-564532-12
5⁄64 5⁄32 18 PTRA-564532-18 PTRM-564532-18
24 PTRA-564532-24 PTRM-564532-24
12 PTRA-53214-12 PTRM-53214-12
5⁄32 1⁄4 18 PTRA-53214-18 PTRM-53214-18
24 PTRA-53214-24 PTRM-53214-24
12 PTRA-31614-12 PTRM-31614-12
3⁄16 1⁄4 18 PTRA-31614-18 PTRM-31614-18
24 PTRA-31614-24 PTRM-31614-24
12 PTRA-316516-12 PTRM-316516-12
3⁄16 5⁄16 18 PTRA-316516-18 PTRM-316516-18
24 PTRA-316516-24 PTRM-316516-24
12 PTRA-1438-12 PTRM-1438-12
1⁄4 3⁄8 18 PTRA-1438-18 PTRM-1438-18
24 PTRA-1438-24 PTRM-1438-24
12 PTRA-516716-12 PTRM-516716-12
5⁄16 7⁄16 18 PTRA-516716-18 PTRM-516716-18
24 PTRA-516716-24 PTRM-516716-24
12 PTRA-51612-12 PTRM-51612-12
5⁄16 1⁄2 18 PTRA-51612-18 PTRM-51612-18
24 PTRA-51612-24 PTRM-51612-24
12 PTRA-3812-12 PTRM-3812-12
3⁄8 1⁄2 18 PTRA-3812-18 PTRM-3812-18
24 PTRA-3812-24 PTRM-3812-24
12 PTRA-7161116-12 PTRM-7161116-12
7⁄16 11⁄16 18 PTRA-7161116-18 PTRM-7161116-18
24 PTRA-7161116-24 PTRM-7161116-24
12 PTRA-1234-12 PTRM-1234-12
1⁄2 3⁄4 18 PTRA-1234-18 PTRM-1234-18
24 PTRA-1234-24 PTRM-1234-24
12 PTRA-5878-12 PTRM-5878-12
5⁄8 7⁄8 18 PTRA-5878-18 PTRM-5878-18
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 1⁄8 18 PTRA-78118-18 PTRM-78118-18
24 PTRA-78118-24 PTRM-78118-24
12 PTRA-1114-12 PTRM-1114-12
1 1 1⁄4 18 PTRA-1114-18 PTRM-1114-18
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 Ceramic Thermocouple Protection Tubes * 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. Ordering Examples: PTRM-11618-12, standard tube with no fitting. PTRM-11618-12-1, standard tube, 1⁄2 x 1⁄2" NPT fitting. Important Ordering Notes Fittings: 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") OD 2. 1⁄2 x 3⁄4" NPT: Fits tubes from 8.0 to 19.0 mm (3⁄8 to 3⁄4") OD 3. 7⁄8" x 27NS Brass Ferrule 50 mm (2") long: Fits tubes from 17.5 mm (11⁄16") OD tubes to 1⁄4" OD Tube with any of the above fittings for an additional cost. Quantity discount applies to like tubes. Other sizes, materials, and configurations by quotation. Discount Schedule For Protection Tubes with Custom Lengths or Fittings Please Consult Custom Engineering