ID Backward Inclined Centrifugal Fan

Type B Centrifugal Fans are designed for industrial applications where the air delivered by the fan has corrosive fumes or light, erosive dust particles. It uses a special Type B backward inclined flat-bladed wheel that’s sturdier and more resistant to erosion and corrosion. This means they need less maintenance even when dealing with contaminated air.

Wheel Design: Backward Curve Wheel

Type B Centrifugal Fans have tough steel blades welded to a streamlined wheel cone and a sturdy steel backplate They work efficiently, with over 80% of their power being used, and they maintain a steady pressure.

Performance Characteristics

1. Pressure to 14 Inches WG
   The static pressure ranges from half an inch to 14 inches, with airflow capacities reaching up to 118,000 cubic feet per minute (CFM), and the temperature can go up to 800°F.
2. Steep Pressure Characteristic
   If the initial estimate of the system resistance is underestimated by 30%, the Type B fan would still provide at least 90% of the originally intended airflow volume.
3. Low Motor Horsepower
   The Type B fan, being highly efficient, requires much less horsepower compared to radial blade fans. This means smaller motors are needed, resulting in reduced power consumption.
4. Non-Overloading Horsepower
   The motor can be tailored to match the fan’s operating horsepower without being oversized, thereby enhancing motor efficiency.
5. Low Speed
   With the Type B wheel, the fan speed is 8% lower compared to the Airfoil wheel, which helps reduce maintenance further.

Performance Curves

Types of ID Centrifugal Fans:-

i – SISW Type Wheel

ii – IRT Type Wheel