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Backward Curved SWSI Centrifugal Fan - Wheel Type R - YFBCSR

Airflow Range: 490~400,000 m³/h

Static Pressure Range: 70~7 500 Pa

Drive Configurations: Direct/ Belt/ Axial

Installation Methods: Base Mount

Applications: Industrial/ Explosion Resistant

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Optimized Design

The fan adopts advanced technology. The design of backward curved centrifugal wheel is optimized by means of CFD hydro-field simulating. The design is more accordant with the aerodynamic characteristics, high efficiency, and stable airflow.


Advanced Process

All steel laser cut blades are welded and positioned accurately. The overall strength of the blades are designed and welded to withstand long hours high speed operation.


High Balancing Level

Each wheel is subjected to dynamic balance test. The balancing level is kept at G4.0 (Typical products are balanced to G6.3 only). Durable, stable and quietness are guaranteed.


High Performance Curve

The wheel has a stable, smooth air performance curve which can efficiently avoid performance drop caused by the deviation of the working point.


Surge Protection

The fan shaft power will not exceed the motor rated power regardless the operation point of the stable working range. Customers can use it without any worries.



High Reliability

ü  Our products use advance FEA-aided design to enhance the reliability of structure.

ü  The hub and the wheel are strengthened and leak-proof thanks to the all-steel continuous welding method. Safety is also significantly improved during operation.

ü  The new shaft and coupling technology ensuring the accuracy during the assembly process while maintaining high reliability.

ü  Maximum load surpasses 35% of limit speed to ensure the long-term continuous operation of the security.

ü  Bearing seal can be lubricated. Service life is more than L10:80000 hours to ensure operation reliability and durability.

ü  The drive unit has a protective shield using eye-catching warning color to ensure personal safety.

ü  All our machines underwent vibration tests prior leaving the factory in order to achieve reliable and durable operation.


High Efficiency

ü  Venturi inlet shall match the front disc precisely to avoid turbulent flow and air leakages, so that the air flows more smoothly to improve aerodynamic performance.

ü  Optimized design repeatedly of CFD flow field simulation to ensure aerodynamic performance complied with the flow field characteristics.

ü  Excellent aerodynamic performance, the maximum efficiency is up to 81%.


·     User Friendly

ü  Flexible motor allocation.


ü  Wide range of standard accessories available.



  • Fan Type

    The fan shall be single inlet with steel backward curved centrifugal wheel. The drive type shall be direct drive, coupling drive and belt drive. Structure of the fan shall allow convenient withdrawal of the wheel for maintenance and cleaning.

  • Quality Standards

    Glass fiber reinforced plastic anti-corrosion fan shall be tested in accordance with AMCA Standard 210 and 300. The manufacturer must own the Production license for industrial Product and ISO9001 quality system authentication.

  • Wheel

    The wheel shall be steel backward curved centrifugal and fully welded. The wheel shall be statically and dynamically balanced to level G4.0 in accordance with AMCA204. When the wheel is operating at the highest allowable speed, the volume shall be stable and the noise shall be low. Wheel features shall be able to avoid performance downgrade resulting from sliding of the working points. Wheel material shall be Q235 for the temperature under 60 degrees centigrade, Q345 for the temperature between 61 and 250 degrees centigrade, and 304SS for the temperature between 251 and 450 degrees centigrade to ensure the wheel’s strength and no creep deformation in high temperature and high speed running in working condition.

  • Fan Housing

    The fan housing shall be steel, the thickness and strength shall be adequate to support fan max running weight. The volute shall be continuously welded and equipped with access door for removing possible foreign objects entered into the scroll.

  • Inlet

    Fan inlet shall be strictly designed according to aerodynamic performance, constructed of glass fiber reinforced plastics. The surface shall be smooth and streamline with good rectification results, reduce turbulence effectively to improve fan efficiency and reduce noise.

  • Coating

    Fan surface shall be polished and cleaned up to remove particulates, welding slag, burrs, sharp edge, iron, oil, then epoxy coating or high temperature coating for high temperature environments use, fan surface shall be free of sags, wrinkle, blisters, exposed metal or peeling after coating. It shall be no corrosion and rust at least 10 years in allowable working condition.

  • Transmission Device (Only for belt drive type)

    Fan shaft shall be heat treated through soaking furnace to the hardness level between 251 and 450 degrees centigrade, and the maximum load is 35% higher than that of the max RPM, the shaft shall be furnished with cover. The material of shaft shall be 40Cr when the working condition temperature under 250 degrees centigrade, and shall be 35CrMo when the working condition temperature between 251 and 450 degrees centigrade. The support structures shall be whole drum-type bearing box. The bearings shall be selected for a minimum (L-10) life in excess of 80,000 hours at maximum cataloged operating speed. The bearing lubrication shall be adopted thin oil between N32 and N46, the amount of lubrication oil shall be according to the requirements of the oil level mark. The Bearing box shall be equipped with water cooling device for choosing whether or not through water according to the conditions in the field for the temperature between 61 and 250 degrees centigrade. The Bearing box shall be equipped with water duct and through water for the temperature up to 250 degrees centigrade, the water consumption increased as the temperature varies, generally can be considered as 0.3~1m3/h. The pulley shall be constructed of cast-iron; Fan pulleys shall be sized for a minimum of 130% of driving power. The pulley and belt shall be furnished with cover. The coupling shall be elastic coupling with cover, too. Its safety of conveying power and torsion shall meet the design requirements.

  • Motor

    Motor shall be closely matched to the fan load, IP54, and insulation class F.Motor and drives shall be out of airflow, avoiding erosion of corrosive gas, extending durability..

  • Explosion-proof Structure (Only for explosion-proof type)

    Fan shall conform to Spark C explosion-proof structure according to AMCA99 Standard. The inlet shall mount copper ring and the motor shall adopt explosion-proof type. The whole fan should own CNEX certification and the manufacturer must own the production license for anti-explosion electric products.

  • Nameplate

    Permanently fixed aluminum nameplate shall be fixed on fan body clearly display fan mark, product model and serial number (i.e.: unique ID for each fan), so that the customer can use this number to find out the parts used.

  • Acceptable Manufacturers

    Qualified suppliers shall have an AAA credit rating. Providing INFINAIR or similar products, with their design based on BCSF models of INFINAIR.


No.55, Qingneng Road, Waigang Town, Jiading District, Shanghai, P.R. China

Zip Code:

201 806


+86 21-3918 5688 EXT-6896


[email protected]

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