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Backward Curved SWSI Centrifugal Fan - Wheel Type O - YFBCSO

Airflow Range: 1,490~109,500 m³/h

Static Pressure Range: 475~10 900 Pa

Drive Type: 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 be undone easily for maintenance and cleaning


    Quality Standards

    The Design and manufacture of the fans are in compliance with the following standards:

    ü  JB/T 10563-2006(Technical Specification for General Purposes Centrifugal Fans)

    ü  JB/T 9101-1999 (Fan Rotor Balance)

    ü  JB/T 6445-2005(Over speed Test for Industrial Fan Impeller)

    ü  JB/T AMCA210-99 (Laboratory Testing & Fans Evaluation Method)

    ü  JB/T 10213-2000(Technical Specification for Fan Welding Inspection)

    ü  GB/T 19074-2003 (Industrial Ventilation Fans- Mechanical Safety Standard for the protection case)



    The wheel shall be steel backward-bladed centrifugal and fully welded. The wheel shall be statically and dynamically balanced to level G4.0 in compliance with ISO standard 1940. Steady air-flow and noise should be minimal when the wheel is operating at the maximum allowable speed. The performance of the fan will not be affected because of the special characteristics of the wheel.


    Fan Housing

    The fan housing shall be made in steel and its thickness and strength should be able to withstand the maximum running weight of the fan. The volute shall be continuously welded and equipped with access door for removing possible foreign objects entered into the scroll.



    Fan inlet shall be aerodynamic design round curved section to transit the air to the wheel cone smoothly, it shall have good commutated effect to reduce turbulence, improve fan efficiency and reduce noise.



    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.


    Belt drive and Coupling drive

    Fan shaft shall be heat treated through soaking furnace to the hardness level between HB250-280, and the maximum load should be 35% higher than the maximum fan operational speed. Two bearings should be used to support the fan shaft. The service life

    span of them should be longer than L-10: 80,000 hours at the maximum operating speed. It should be sealed and lubricated under normal temperature. The pulley shall be made of cast-iron and its construction size is determined corresponding to 130% of the driving power. The pulley and belt should be furnished with cover. The coupling shall be elastic coupling with cover as well. The safety of conveying power and torsion shall meet the design requirements.



    Motor is carefully matched to the fan load, protection level IP54, and insulation class F. Motor ball bearings are used and lubricated. Motor and drives are isolated from the air stream to avoid grease or dirt accumulation.


    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.



    Aluminum manufacturer name plates each containing serial number and model type are mounted permanently on all fan bodies. All name plates are traceable by customers.


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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