XinFeng Classroom | Ventilator Series: XFB Series Backward-Curved Centrifugal Fans

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XFB Backward-Curved Centrifugal Fan Product Description  

The XFB series backward-curved centrifugal fans are a standard model designed by Xinfeng, ranking among the most efficient centrifugal fans in operation. The integrated design mounts the fan, transmission assembly, and motor onto a single rigid frame, thereby simplifying installation, reducing on-site commissioning time, and shortening overall installation schedules.

C-type fans can be equipped with integrated bearing housings, featuring well-lubricated bearings and extended service life. When paired with water-cooled bases, they can operate continuously under high-temperature conditions. C-type fans can be manufactured with non-standard rotational speeds to achieve customized parameter adjustments.

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 XFB Backward-Curved Centrifugal Fan Applications

    Applications: Widely used in large and medium-sized factories, civil buildings, large plazas, power plants, air handling equipment, and hot air circulation systems. 

 Gas Handling: Non-flammable, non-explosive, and non-corrosive gas media.

Airborne Dust: No viscous substances are permitted in the gas stream. If used for conveying fine particulate materials, the service life of the fan impeller will be reduced.  Normal Temperature: The fan's normal operating temperature should not exceed 80°C. For special application requirements, please consult our technical department.  03 

 Precautions for XFB Backward-Curved Centrifugal Fans  

Reading the fan manual before operation ensures proper equipment usage.  

Inspect all components and major parts before installation. Check for damage, wear, or friction.  

Address any abnormalities before commissioning.

Inspect the interior of the housing for any debris or tools left behind. Ductwork must be supported independently and should not rely on the fan to bear its weight. When installing Type C fans, ensure the impeller is correctly positioned within the fan casing and that the pulley is properly aligned and level. The base must be coaxial. 

When installing Type D fans, ensure the impeller is correctly positioned within the casing and that the motor and shaft drive assembly bearing housings are free of lubricant upon delivery to account for transportation. After installation, add lubricant to the bearing housings. For normal temperature operation, use No. 20 lubricant; for higher temperatures, use No. 30 lubricant. The oil level should be midway in the bearing housing sight glass. Immediately shut down the unit and inspect during trial operation if any of the following conditions occur. Restart only after troubleshooting is complete: 

① Smoke emission or excessive noise from the motor 

② Fan remains stationary while the motor emits abnormal sounds 

③ Significant metallic grinding noises are present 

④ Severe vibration occurs 

⑤ Bearing temperature rises to an abnormally high level within a short timeframe