Selection of Sealing Materials for Pyrolysis Furnace Doors

Selection of Sealing Materials for Pyrolysis Furnace Doors

1. First Consider Working Conditions

Temperature: Choose ceramic fiber or graphite for ≥800℃; glass fiber or high-temperature rubber is applicable for ≤600℃.

Medium: Select graphite or fluororubber if oil vapor or corrosive gas is present.

Pressure: Adopt metal wound gaskets for high-pressure flange doors; use graphite packing or ceramic fiber tape for micro-negative pressure quick-opening doors.

2. Match Furnace Door Structure

Flange bolt doors: Prioritize metal wound gaskets or graphite composite gaskets.

Quick-opening doors: Choose graphite packing or ceramic fiber rope (good resilience, resistant to frequent opening and closing).

Small test furnaces: Use glass fiber packing or ordinary ceramic fiber tape.

3. Consider Operation and Maintenance

Frequent opening/closing: Adopt metal foil-reinforced ceramic fiber tape or graphite packing (wear-resistant and durable).

Infrequent operation: Use conventional ceramic fiber or glass fiber (low cost).

Easy maintenance: Select pre-cut gaskets or packing for convenient replacement.

4. Safety and Environmental Protection

Use materials with high temperature resistance and non-toxicity at high temperatures; prioritize graphite and ceramic fiber.

Choose non-toxic and recyclable materials to avoid secondary pollution.

5. Common Combinations

High temperature + frequent operation: Graphite packing + metal foil-reinforced ceramic fiber tape

High-pressure flange doors: Metal wound gaskets

Medium/low temperature + oil vapor: Fluororubber gaskets + graphite packing

Small test furnaces: Glass fiber packing