Aerodynamic Performance of High Efficiency
— Airfoil blades with optimum aerodynamic performance are used.
— The hub is designed in vortex shape.
— CFD simulation technology is used for optimized design which is also validated through repeated trials.
— High-standard processes are used to reduce clearance between the impeller and the cylindrical fan body.
— The impeller has great efficiency that helps save operational cost
— The hub-to-tip ratio reaches 0.56.
— It has high pressure rise rates and airflow delivery efficiency gets improved.
— It helps reduce volume loss resulting from insufficient pressure.
— This design allows for airflow delivery over long distance.
— The casting process of high standard is adopted to ensure the manufacturing accuracy and stability.
— The impeller has the design CAE aided that goes through tests for optimization.
— The vortex-shaped hub has high-strength and makes operation more reliable.
— There is a creative way of hub connecting for safer operation.
— The impeller reaches G2.5 grade balancing level (whereas common products have only G6.3 level).
— It helps reduce vibration in operation and improves reliability.
— The sound is substantially down.
— There are totally 14 impeller specifications from 315 to 1400mm.
— There are 8 blade pitches all together from 0 to 35 degrees.
— There are four poles of 2/4/6/8 and 4 speeds available.
— Through optimized model selection, the upfront investment is reduced and operation costs lowered.
— Airfoil blades that have optimum aerodynamic performance are used.
— The smooth vortex-shaped hub reduces turbulence.
— High-standard processes are used to reduce clearance between the impeller and the cylindrical fan body so that greater efficiency can be achieved.
— There are guide vanes fitted at the back of the impeller.
– The advanced FEA-aided design is adopted for continuous optimization
— Core components use the casting process so that high strength can be ensured.
— By using the die-formed technology, high precision and great consistency are achieved.
— The higher balancing level helps create reliability in operation.
— The transmission efficiency is much higher.
— There are no quick wear parts and low maintenance is required.
— Maintenance work is convenient and efficient.
— Long working life can be achieved by using the bearings that are sealed and require no lubrication.
— Less space is needed as the product size is smaller.
— General ventilation
— Explosion-proof ventilation
— Positive pressure air supply/ Smoke exhaust
— Two-speed ventilation
— Base-mount: horizontally or vertically.
— Ceiling-hung: horizontally or vertically.
— Roof mounted: Flag-CloudTM weather hood is used for outdoor installation.
— Pickling, parkerizing and alkaline wash processes are used so that the surface can be clean and tidy.
— The modular film is processed in the high temperature furnace for strong adhesive properties.
— It is resistant to both large-area uniform corrosion and localized pitting corrosion.
Certifications
YFIAM fans have the AMCA certification for Sound & Air Performance & FEG and are TUV SUD certified to run for 120 minutes under 300°C.
The YFIAM fan shall be vane-axial type that has airfoil blades. It shall be of direct drive and the whole fan takes on a cylindrical shape. There shall be guiding vanes at the back of the impeller for smooth airflow. The guiding vane shall be 3D curved to conform to flow field characteristics to improve the aerodynamic performance and static pressure efficiency.
Tests shall be performed on YFIAM fans and certificates obtained under AMCA Standard 210 & 300. Each fan shall bear the AMCA Seal for Sound and Air Performance before leaving the factory. The manufacturer shall have the Production License for National Industrial Products and get the ISO9001, ISO14001 and OHSAS18001 certification.
The impeller shall be axial type that has airfoil blades of different blade pitches so that flexible model selection can be made to meet variable operating conditions. To avoid eddies, the vortex –shaped hub and airfoil blades of optimum aerodynamic performance shall be used. At the highest running speed, the impeller shall produce smooth airflow and low sound. The hub and blades shall be made of cast aluminum and they shall remain operational under a speed 120% of the highest speed for structural reliability and operational safety. The impeller shall undergo dynamic balancing tests and reach AMCA 204- G2.5 balancing level for greater stability and longer working life.
It shall be continuously welded with quality carbon steel and lap joint flanges are used. The carbon steel shall be over 2mm for the impeller diameter of less than 500mm; it shall be over 2.5mm for the impeller diameter of between 500 and 1000mm; and it shall be over 3mm for the impeller diameter of over 3mm. All this helps make the fan operate safely and reliably over a long period with its working life extended.
The fan surface shall be treated so that no protuberances, welding spatters, burrs, sharp edges, scrap iron and greasy dirt can be found. The processes of oil removal, pickling, parkerizing and applying putty are done and then electrostatic epoxy coatings shall be applied. Also for the corrosion-free operation in the long term, the surface shall be a level one without sags, cracks, cockles or detachment.
The motor adopts B5 or B14 installation type. It shall have a degree of protection standard IP55, an insulation class F (Class H Insulation for smoke exhaust) and Temperature Rise Class B. Its bearing shall be of ball type and require no lubrication. For safe fan operation, over 110% shall be chosen as the coefficient of power reserve in selecting the motor. An epoxy coated rain cover shall be used for outdoor installation. Appropriate external junction box shall be provided by the supplier.
The motor shall be of explosion-proof type. An AMCA 99 Type C Spark Resistant Construction shall be adopted. The fan shall have the Ex Certificate of Conformity and the Production License for Explosion-Proof Electrical Products shall be obtained.
As a fan used for smoke exhaust, the relevant requirements of GA 211-2009 High Temperature-Resistant Test Methods for Smoke and Heat Exhaust Ventilators and CNCA-C18-02：2014 China Compulsory Certification Implementation Rules – Fire protection products and CCCF-HZFH-03 China Compulsory Certification on Fire Protection Products and Smoke Exhaust Equipment shall be met. Under 280 degrees, the fan shall run for over 30 minutes and no mechanical or electrical failures occur. State authorized test agencies shall issue the type test report for the YFIAM fan and the fan shall have a CCCf certificate.
As a fan used for smoke exhaust, the relevant requirements of EN12101-3 Smoke and heat control systems- Part 3: Specification for powered smoke and heat exhaust ventilators shall also be met. Under 300 degrees, the fan shall run for over 120 minutes and no mechanical or electrical failures occur. Both the TUV SUD test report and Class 1A certificate of CoC shall be obtained.
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