Sealing Material Designed for Repeated Furnace Door Movement
Alumina Fiber Felt for Furnace Door is a lightweight refractory sealing material designed specifically for industrial furnace doors, furnace covers, and opening structures.
The product is made mainly from loose fiber cotton combined with organic and inorganic binders. It is formed through a wet vacuum filtration process.
The finished felt combines elasticity, toughness, and a semi-rigid structure. It can retain a defined shape while adapting to compression and changes in contact when the furnace door closes.
Its lightweight structure and thermal insulation performance make it suitable for high-temperature equipment where the sealing material is opened, compressed, inspected, or replaced periodically. The product is also designed to avoid obvious dust generation during normal handling and use.
Choosing a Grade by Door Temperature and Compression Conditions
The product is available in NC1260, NC1400, and NC1600 grades. All three have a bulk density of 150–250 kg/m³.
NC1260 is intended for relatively lower-temperature areas, while NC1400 is available for higher-temperature furnace doors and joints. NC1600 contains 70% Al₂O₃, with combined Al₂O₃ and SiO₂ content above 99.5%.
Their permanent linear change after heating also differs according to grade.
When selecting Alumina Fiber Felt for Furnace Door, buyers should consider hot-face temperature, opening frequency, sealing groove space, and expected compression condition rather than comparing classification temperature alone.
This helps match the sealing material more closely to the actual furnace door structure.
From Fiber Material to Custom Door Seal Dimensions
Nengcheng Crystal has production capabilities covering alumina fiber raw materials, wet forming, and finished-product machining. This allows the factory to support furnace door sealing projects from material selection through dimensional processing.
Before production, technical staff can discuss furnace door type, operating temperature, and installation position. During production, the factory arranges work according to the confirmed model and order quantity. After delivery, dedicated personnel continue to handle after-sales communication.
The factory has 11 years of operating experience, 45 employees, and its own R&D team. Both standard furnace door sealing felt and non-standard products developed from technical drawings can be supplied.
Sample Orders, Inspection and Transportation Handling
Alumina Fiber Felt for Furnace Door supports sample confirmation and orders starting from one piece. Different temperature grades can also be combined within the same order, which is useful for equipment manufacturers or maintenance teams preparing spare parts for different furnace types.
Products are normally inspected before packaging, and third-party inspection is accepted.
Packaging options include cartons, wooden cases, and wooden pallets. If compression or other transportation damage is found after delivery, buyers should keep product photos and videos. The factory can first arrange replacement, then investigate the reason and discuss the final solution.
According to the supplied information, this furnace door sealing felt is treated as a consumable or wear item and does not have a fixed warranty period. Buyers can therefore use samples and technical parameters before purchasing to reduce selection differences.
Product Specifications
|
Parameter |
NC1260 |
NC1400 |
NC1600 |
|
Classification Temperature |
1260°C |
1400°C |
1600°C |
|
Bulk Density |
150–250 kg/m³ |
150–250 kg/m³ |
150–250 kg/m³ |
|
Permanent Linear Change on Heating |
1000°C × 24h < 1.3% |
1150°C × 24h < 1.5% |
1500°C × 24h < 2.0% |
|
Al₂O₃ Content |
45% |
52% |
70% |
|
Al₂O₃ + SiO₂ Content |
99% |
99% |
>99.5% |
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