FHL-VAC® Modules & Panels
FHL-VAC® Cylindrical Insulation Segments
Vacuum-formed cylindrical segments for pit, bell and tube-type furnace linings from ID 100 mm.
FHL-VAC® Cylindrical Insulation Segments are vacuum-formed ceramic fiber half-shells and segments shaped to line cylindrical furnace chambers. They replace traditional heavy insulations with a low-mass, low-conductivity lining that ramps and cools rapidly.
Up to 1550°CKey features
Precision-formed cylindrical geometry — tight, gap-free linings
From ID 100 mm up to customer requirement
Easy to handle, cut and fit on site
Three temperature grades
Optional hangers and hardware provisions
Segments are manufactured from ID 100 mm upward to customer requirement, in all three FHL-VAC® grades, and can be supplied with hangers and hardware provisions.
Custom-Built Parameters
- Thickness
- 50 / 75 / 90 / 100 / 125 / 150 mm standard · other thickness can be customised
- Inner diameter
- From ID 100 mm up to customer requirement
- Grades
- FHL-M 1150 · FHL-Z 1325 · FHL-HT 1550
Typical Applications
Technical data
Published grade data for FHL-VAC® insulation. Values are typical for the grade; confirm design values with our engineers for your duty cycle.
Technical Data — FHL-VAC® Modules & Panels
| Parameter | FHL-M 1150 | FHL-Z 1325 | FHL-HT 1550 |
|---|---|---|---|
| Classification Temperature (°C) | 1260 | 1425 | 1650 |
| Max. Continuous Working Temp. (°C) | 1150 | 1325 | 1550 |
| Density Range (kg/m³) | 200 – 240 | 200 – 240 | 200 – 240 |
| Linear Shrinkage % (24 h at Continuous Working Temp.) | < 1 | < 1 | < 1 |
Chemical Composition (%)
| Component | FHL-M 1150 | FHL-Z 1325 | FHL-HT 1550 |
|---|---|---|---|
| Al₂O₃ | 47 | 37.5 | 66 |
| SiO₂ | 53 | 49.5 | 33 |
| Zr | — | 13 | — |
Thermal Conductivity (W/mK)
| Mean Temperature | FHL-M 1150 | FHL-Z 1325 | FHL-HT 1550 |
|---|---|---|---|
| At 200°C | 0.065 | 0.065 | 0.065 |
| At 600°C | 0.13 | 0.13 | 0.14 |
| At 1000°C | 0.27 | 0.28 | 0.24 |
| At 1200°C | 0.40 | 0.38 | 0.33 |
| At 1300°C | 0.48 | 0.47 | 0.39 |
| At 1400°C | — | 0.53 | 0.45 |
| At 1500°C | — | — | 0.51 |
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View specificationsLet's build your upgrade
Need Cylindrical Segments built to your drawing?
Send us your chamber dimensions, temperature and cycle — we will respond with a technical proposal and quotation.