The fan has the backward curved centrifugal wheel with its design optimized through CFD simulation and more accordant with the aerodynamic characteristics. High efficiency and more stable airflow are thus ensured.
The plasma cutting, positioning fixture of high precision and all-welding technique contribute to the smoothness, high strength and great reliability of the steel blades that has uniform stress distribution for long-term high speed running.
High Balance Quality Grade
Each wheel has been dynamically balanced up to G4.0 standard (Just G6.3 for general products domestically and internationally).Durability, stability and quietness are guaranteed.
Wide Performance Range of High Efficiency
The wheel has stable and flat performance curves over a wide range of operating conditions which can efficiently avoid performance drop as the operating point moves up or down.
There exists a maximum shaft power for the motor. When the motor is selected based on the maximum shaft power, motor power and motor service factor, the shaft power can never exceed the rated motor power as the fan runs within the operating range. The user can be rest assured in this respect.
· FEA-aided design helps enhance the structural reliability.
· The scroll and wheel are strengthened and leak-proof thanks to the all-steel continuous welding method. Operational safety is also significantly improved.
· The new shaft and coupling technology ensure accuracy during the assembly process and improve product reliability.
· The fan shaft has been treated through hardening and tempering and finish turning processes. Its maximum load is 35% more than the highest speed to ensure the long-term safe and continuous operation.
· The bearing seal can be lubricated. Its L10 rating service life is in excess of 80000 hours to ensure operational reliability and durability.
· The drive unit has a protective cover with a bright color for warnings to ensure safety.
· The product has undergone vibration tests before leaving the factory in order to achieve reliable and durable operation.
·The wheel cone is carefully matched to the inlet cone for precise running tolerances to reduce air leakage and turbulence and improve air performance.
·The design is optimized repeatedly through CFD simulation to ensure the aerodynamic performance accords with the flow field characteristics.
·The Fan Efficiency Grade reaches as high as FEG 80 (AMCA 205-10).
User Friendly Convenience
· Different drive types makes motor selection flexible.
· Some commonly used accessories are provided with the fan.
· A complete set of accessories are available for various applications.
The fan shall be of the single-inlet centrifugal type with the backward curved steel wheel. The drive types shall be direct, coupling or belt.
Standards and Codes
The design and manufacturing of the fan shall comply with JB/T 10563-2006 Technical Specification for General Purposes Centrifugal Fans; The wheel dynamic balancing test shall comply with JB/T 9101-1999 Fan Rotor Balance; The wheel overspeed test shall comply with JB/T 6445-2005 Overspeed Test for Industrial Fan Impeller; The air performance test shall comply with JB/T AMCA 210-99 Laboratory Methods of Testing Fans for Aerodynamic Performance Rating. The welding technique shall comply with JB/T 10213-2000 Technical Specification for Fan Welding Inspection; The fan safety shall comply with GB/T 19074-2003 Industrial fans--Mechanical safety of fans--Guarding.
The wheel shall be of the backward curved centrifugal steel type and all welded. The wheel shall be statically and dynamically balanced up to ISO 1940-G4.0 standard. Stable airflow and low sound should be ensured as the wheel is operating at the maximum allowable speed. Drop in performance shall be avoided as the operating point moves up or down. The wheel shall be readily removable for cleaning or maintenance.
The fan housing shall be constructed of steel and it shall be thick and strong enough to withstand the maximum operating weight of the fan. The housing shall be continuously welded and have an access door for removing possible foreign bodies.
The inlet shall be designed in line with aerodynamics. It shall be streamlined for better airflow movement and efficiency, reducing turbulence and sound.
Belt Drive and Coupling Drive
The fan shaft shall be treated through hardening and tempering and finish turning processes up to the hardness level of HB250-280. Its maximum load shall be 35% more than the highest fan speed. The shaft shall be supported by two bearings with L10 rating service life of over 80000 hours. It shall be sealed and can be lubricated under normal operating temperatures. The pulley shall be of cast iron type and shall be sized for a minimum of 150% of the driving power. There shall be pulley and belt guard. Flexible coupling equipped with a guard shall be used. The factor of safety of power transmission and torsion shall meet the design requirements.
The motor shall be carefully matched to the fan load. It shall be IP54 rated with class F insulation. Ball bearing that can be lubricated shall be used. The motor and drive mechanism shall be isolated from the airstream to avoid grease or dirt accumulation.
The surface of the fan shall be polished to remove any protuberances, welding spatters, burrs, sharp edges, scrap iron and greasy dirt before being finished with electrostatic grey 9006 epoxy coatings. The finished gloss level shall be greater than or equal to 70%. The surface shall be a level one without sags, cracks, cockles or detachment and shall remain free from corrosion and rust for at least ten years under normal operating conditions.
A permanently fixed aluminum nameplate shall clearly display the fan number, product model and serial number (a unique ID for each fan) so that the parts used can be traceable by customers.
No.55 Qingneng Road, Waigang Town, Jiading District, Shanghai, P.R. China