High Temperature Fan, a sort specially designed to perform in high temperature environments, operates on similar principles as regular fans but adopts unique materials and design for withstanding extreme temperatures.

1. Impeller: The impeller is usually constructed from high temperature resistant alloys such as Inconel, Hastelloy or ceramics, providing robust strength, resistance to corrosion and high heat tolerance. Its shape is designed for optimal airflow efficiency and reduced turbulence.

2. Cabinet: Fabricated from high-temperature resistant materials like stainless steel, cast iron or ceramics, the cabinet offers a sealed space for the impeller, safeguarding external parts from high-temperature gases.

3. Bearing: High Temperature Fans employ custom-designed bearings, built to run smoothly at elevated temperatures typically made of ceramics or graphite using special lubricants.

4. Motor: These fans harness high temperature motors, tailor-made for operation in high temperatures. Motors are often made with high-temperature insulation and equipped with cooling systems to prevent overheating.

5. Cooling System: A cooling system, comprising external fans or water/oil cooling systems, is commonly incorporated into high temperature fans to protect component overheating.

6. Seals: High Temperature fans utilize high temperature seals to prevent gas leakage. These seals are typically formed of graphite, ceramic, or special polymers.

Here’s how they work:

1. An electric motor propels the impeller.

2. Impellers spinning introduce gas into the fan inlet.

3. This accelerating gas generates pressure.

4. It’s expelled through the fan outlet.

These fan types can sustain all kinds of high temperature gas including smoke, exhaust, hot air and process gases equitably.