Centrifugal Fans for High-Temperature Environments:

When used for conveying high-temperature gases, centrifugal fans must be made from materials that can withstand such conditions. Ordinary carbon steel rapidly loses its mechanical properties at temperatures above 300°C, so heat-resistant materials should be chosen for such environments.

• For temperatures above 700°C, high-temperature alloy steels (e.g., nickel and chromium-containing steel) are recommended to ensure fan stability and durability.

Explosion-Proof Fans:

In environments where flammable and explosive gases are present, explosion-proof centrifugal fans are essential. Common applications include the transport of petroleum gases, chemical gases, and other flammable substances.

• Explosion-proof fan housings are typically made from steel plates, and the impellers are often made of aluminum to prevent sparks caused by collisions or friction, which could lead to an explosion. For highly flammable gases, both the impeller and housing must be made from aluminum alloy materials to minimize the risk.

Abrasion-Resistant Centrifugal Fans:

When conveying gases containing dust, sand, or other particulate matter, centrifugal fans are prone to wear and tear. To ensure the fan’s longevity and stability, abrasion-resistant materials should be chosen, or a dust removal device should be installed at the intake to reduce damage caused by particles.

Comprehensive Material Selection Considerations:

When designing and selecting materials for centrifugal fans, several factors must be taken into account:

• Medium Temperature: High temperatures demand heat-resistant materials.
• Corrosiveness: The material must be resistant to corrosion if the conveyed gases are chemically aggressive.
• Abrasion Resistance: For applications involving particles, materials should be durable enough to withstand wear.
• Explosive Risk: In volatile environments, explosion-proof materials are necessary for safety.

For specialized applications, choosing the right materials not only enhances the operational efficiency of the equipment but also improves safety and stability. Proper material selection ensures that the fan can operate effectively and safely in challenging environments.