DIELECTRIC INSULATING MATERIALS
I²r stocks a complete inventory of high quality standard and custom Shunt/Yoke insulation materials, cut to size and packaged for quick, no waste installation for all steel shell and open frame furnace designs and manufacturers. Our Inventory Features:
- Gasket material for proven dielectric insulation between the coil and the shunt. We stock name brands such as Teadit®, Garlock®, and Klinger® all with high temperature and compression strengths. Sheet Dimensions = 59” x 126” x .125” Thick.
- Mica Silicone Bonded Insulation (NEMA 312) for most European, VIM, and special application Induction Furnaces, dielectric strength of over 700 Volts/Mil. Sheet Dimensions = 36” x 96” x .030” Thick.
- Teflon® PTFE for high temperature, high dielectric and chemical resistant applications. Sheet Dimensions = 500’ rolls x 36” x .030”.
- Ceramic mill-board, produced by Therm-Cut® for high temperature thermal protection between the shunt/yokes and the induction coil rated@ 2192° F insulation. Sheet Dimensions =55” x 55” x .250”.
- Maranite P in coreless furnace applications, Marinite P insulation can be used as a pallet to support upper refractory castables in an open frame coreless furnace rated @ 1700°-1800°F.
- ALL OEMs Supported.
TEADIT®
TECHNICAL SPECIFICATIONS view specs
| Teadit 1001 |
| Style NA1001
is a compressed non-asbestos sheet gasket material produced from a
combination of aramid and other synthetic fibers and bonded with nitrile
rubber (NBR). It is manufactured through the hot calender process under
rigorous quality control standards that are registered under ISO-9001
certification |
| Application / Service |
|
| Style NA1001 is
a very good general service gasket material that has numerous applications in
the process industries and in the water and waste water industry. It is also
commonly used in equipment such as valves and pumps. Style NA1001 is
suitable for service handling the following general media categories: |
| Mild inorganic acids |
Vegetable oils |
| Diluted alkalis |
Aromatic solvents |
| Aliphatic solvents |
Neutral solutions |
| Synthetic oils |
Concentrated alkalis |
| General chemicals |
Brine |
| Oxygenated solvents |
Animal oils |
| Mild organic acids |
Petroleum and Derivatives |
| Water |
Air |
| Industrial gases |
Refrigerants |
|
|
| Teadit 1001 Properties |
Specifications |
| Temperature Limits |
750°F (400°C) Max |
|
460°F (240°C)
Continuous |
| Pressure Limits (Vacuum) |
1595 psi (110 bar) |
|
725 psi (50 bar) |
| Color |
Green or White |
| Density |
109 ib/ft³ (1.75 gm/cc) |
| Compressibility |
7-17% |
| Recovery |
Min 45% |
| Tensile Strength Across Grain |
1670 psi (11.5 N /mm²) |
| Ignition loss |
Max 34% |
| Thickess increase after 5 hour immersion |
|
| ASTM IRM 903 @300°F (150°C) |
Max 12% |
| ASTM Fuel B @77°F (25°C) |
Max 10% |
| Weight increase after 5 hour immersion |
|
| ASTM IRM 903 @300°F (150°C) |
Max 15% |
| ASTM Fuel B @77°F (25°C) |
Max 15% |
| Creep Relaxation |
25% |
| Torque Relaxation (DIN 52913) |
28.N/mm² |
| Seal ability at 1000psi |
0.25 ml/h |
MUSCOVITE MICA (Yoke Insulation, and Slip Plane)
TECHNICAL SPECIFICATIONS view specs
| Muscovite Mica (Yoke Insulation,
and Slip Plane) |
| Properties |
Units |
Specifications |
| Color |
|
Ruby / green / White |
| Density |
gm/cm³ |
2.6-3.2 |
| Specific Heat |
|
0.21 |
| Hardness |
Moh scale |
2.8-3.2 |
| |
Shore Test |
80-105 |
| Breakdown Voltage |
KV/mm |
120 - 200 |
| Coefficient of expansion per °C perpendicular to cleavage plane |
|
9x10⁻⁶− 36 x
10⁻⁶ |
| Thermal conductivity perpendicular to the
cleavage plane |
Gm.cal/sec/cm²/°C/cm |
about 0.0013 |
| |
BTU/hr/ft²/0f/ft |
about 0.31 |
| Water of Constitution % |
|
4.5 |
| Moisture absorbtion |
|
Very low |
| Volume Resistivity |
25°C (77°F) ohm cm |
4 x 10¹³- 2 x 10¹⁷ |
| Acid Reaction |
|
Affected by Hydrofluric acid |
| Insulation resistance |
x 10¹³ ohm/cm |
4 - 20000 |
| Calcining temp |
°C |
700 - 800 |
| Max. operating Temp |
°C |
500 - 600 |
| Optical Axial angle |
degrees |
55 - 75 |
| Tensile Strengths |
MN/m² |
175 |
| Shear Strengths |
MN/m² |
220 - 270 |
| Compression Strengths |
MN/m² |
190 - 285 |
| Modulus of Elasticity |
Kgfcm2 x 10⁻³ /
ibf/in²x
10⁻⁶ |
1400-2100 /
20-30 |
| Loss tangent |
x10⁻⁴ |
.0001 - .0004 |
| Permitivity at 15°C (60°F) |
|
6--7 |
TEFLON® SHEET DATA view specs
| Teflon sheet is a transparent,
thermoplastic film that can be heat sealed, thermoformed, vacuum formed, heat
bonded, welded, metallized, laminated, and used as an excellent hot-melt
adhesive. This wide variety of fabrication possibilities combines with the
following important properties to offer a unique balance of capabilities not
available in any other plastic film. |
| Teflon film is a chemically
inert and solvent resistant to virtually all chemicals, except molten alkali
metals, gaseous fluorine, and certain complex halogenated compounds, such as
chlorine trifluoride at elevated temperatures and pressures |
|
|
Typical Valve |
| Property |
Test Method |
SI Units |
English Units |
| Tensile strength at break |
ASTM D-882 |
21 N/mm² |
3000 psi |
| Elongation at break |
ASTM D-882 |
300% |
| Yeild point |
ASTM D-882 |
12 Mpa |
1700 psi |
| Elestic Modulus |
ASTM D-882 |
480MPa |
70,000 psi |
| Impact Resistance |
Pneumatic impact tester |
6.2 x 10⁴ |
14 in . Lb / mil |
| Folding Endurance |
ASTM D-2176 |
100,000 cycles |
| Tear strength - Initial (Graves) |
ASTM D-1004 |
4.90 N |
500 g |
| Tear strength - Propagating (Elmendorf) |
ASTM D-1922 |
0.74 N |
75 g |
| Melt Point |
ASTM D-3418 (DTA) |
302-310°C |
575-590°C |
| Thermal Conductivity |
Cenco-Fitch |
0.195 W / (m.k) |
1.35 Btu . In / (h.ft²°F) |
| Specific Heat |
- - |
1172 J/ (kg.K) |
0.28 Btu . In / (h.ft²°F) |
| Dimensional Stability |
30 min @ 150°C (302°F) |
MD = 1% Shrinkage / TD = 1% Shrinkage |
| Oxygen Index |
ASTM D-2863 |
95% |
| Dielectic Strength, short time, in air at
23°C (73°F), 6.35 mm (1/4 in)
diameter electrode, 0.79mm (1/32 in) radius, 60HZ, 500v/s rate of rise:
0.025mm (1mil) film |
ASTM D-149 Method A |
260 kV/mm |
6500 V / mil |
| Dielectric Constant, 25°C (77°F), 100Hz to
1 Mhz |
ASTM D-150 |
2 |
| Dissipation Factor, 25°C (77°F), 100Hz to
1 Mhz |
ASTM D-150 |
0.0002 - 0.0007 |
| Volume Resistivity, -40 to 240°C (-40 to 464° F) |
ASTM D-257 |
>1 x 10¹⁷
ohm-cm |
| Moisture Absorption |
⁻ |
<0.02% |
| Permability, Gas: |
ASTM D-1434 |
cm³ / (m²-24 h-atm) |
| Carbon Dioxide |
|
14 x 10³ |
| Nitrogen |
|
2.0 x 10³ |
| Oxygen |
|
6.7 x 10³ |
| Permability, Vapors |
ASTM E-96 |
g / (m²-d) |
g / (100 in² - 24 h) |
| Water |
|
2 |
0.13 |
| Teflon® is
chemically inert and solvent resistant to virtually all chemicals, except
molten alkali metals, gaseous fluorine, and certain complex halogenated
compounds such as chlorine trifluride at elevated temperatures and pressures. |
| Density |
ASTM D-1505 |
2150 kg/m³ |
134 lb/ft³ |
| Coefficient of Friction
Kinetic (Film-to-Steel) |
ASTM D-I 894 |
0.1-0.3 |
| Refractive Index |
ASTM D-542 |
1.35 |
| Solar Transmission |
ASTM E-424 |
96% |
THERMAL NON-ASBESTOS MILLBOARD
TECHNICAL SPECIFICATIONS view specs
| Thermal Millboard is a
high temperature material for use in gasketing, insulation, personal
protection, heat and flame barriers, dryers, parting media, and expansion
joints. It is intended for use in applications with maximum continuous
operating temperatures up to 1260°C (2300°F)and it resists melting up to 1760°C
(2300°F). Commonly used to replace NAD-11
insulators in Steel Shell coreless induction furnaces. Available in
1/4" thicknesses and cut to desired width(2). |
| Property |
Method |
Specifications |
| Density, g /cc (lb/cu.ft) |
ASTM F-1315 |
0.56 (35) |
| Compressibility, % (at 12MPa) |
ASTM F-36 |
20 |
| Tensile Strength MD, Mpa (psi) |
ASTM F-152 |
5.17 (750) |
| Tensile Strength AMD, Mpa (psi) |
ASTM F-152 |
2.07 (300) |
| Thermal Conductivity, W/m.K |
ASTM-433 |
0.09 (at 260°C), 0.11
(at 430°C) |
0.15 (at 700°C), 0.19
(at 870°C) |
| Weight loss on Ignition, % (@538°C) |
ASTM-F495 |
8 |
| Chemical Analysis |
|
|
| Silicone Oxide, % by Weight |
|
51.25 |
| Aluminum Oxide, % by Weight |
|
43.5 |
| Other Oxides, % by Weight |
|
5.25 |
MARANITE P
TECHNICAL SPECIFICATIONS view specs
| Maranite P Combines structural
strength with high thermal insulating values. This insulation offers
excellent resistance to compression as well as high tensile, shear, and
transverse strengths. The material will not decay or rust. It is
incombustible, highly damage resistant, non-corroding, and extremely water
resistant. Maranite P panels also provide fire safety, uniform temperature
control, minimal maintenance: and it's machinable. |
| Composition: |
|
|
| An oven dried structural
insulation board formed from calcium silicate with inert fibers and
reinforcing agents. |
| Property: |
Method: |
Specifications: |
| Density |
|
60lbs/ft³ - 961 kg/m³ |
| Maximum Operating temperature |
|
1200°F (649°C) |
| Shrinkage during initial heating |
|
|
| Length & Width |
|
0.60% |
| Thickness |
|
2.10% |
| Compressive strength - for 10% deformation |
|
3050 psi |
| Modulus of rupture |
|
1400 psi (98Kg/cm²) |
| Pandux, Durometer Hardness |
|
|
| Die side |
|
75 |
| Screen Side |
|
78 |
| Normal Moisture content |
|
3% |
| Thermal Conductivity |
|
1.173BTU-in/ft², hr,°F @
400°F (0.16W/mK @ 538°C) |
|
|
1.17 BTU-in/ft², hr,°F @
400°F (0.17W/mK @ 538°C) |
| Fire Hazard Flame Spread |
|
|
| Flame Spread |
|
0 |
| Smoke Developed |
|
0 |
| Volume resistivity |
ASTM
D-257 |
5.0 x 108 ohm-cm |
| Dielectric strength |
ASTM
D-495 |
46 v/mil |
| Screw holding strength @ 7/8"
penetration |
|
500 lbs (227kg) |
|
|
