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Products

Centrifugal Utility Set-CUS

● Wheel Specification: 300~1,000
● Installation: hanging, floor-mounted
● Volume range: 500~550,00 m³/h
● Static pressure range: 136~1,600 Pa
 
● 4G Wind-surfer backward inclined centrifugal wheel,high efficiency and non-overloading.
● Fully welded, high strength and leak-tightness. Balance quality grade up to G2.5 (AMCA 204).
● Fan size reduced, expensive mechanical room space saved.
● Integral motor cover suitable for outdoor installation.
● Various transmission ways for flexible selection and allocation.
● Sound and air performance certified by AMCA international.

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Effect of the 4rd generation Wind-SurferTM wheel series
-- Excellent aerodynamic characteristics and noise characteristics.
-- High-efficient area width without overloading.
-- Balance quality grade up to G2.5(Typical products are balanced to G6.3 only).

Air performance design
-- Optimized design of CFD flow field simulation,repeatedly validated.
-- Front disc and inlet venture tube according with folw field characteristic.
-- Flow passage control:matched each other to restrain the air flow better.
-- Optimize the blade angles.

Structure performance design
-- Stress analysis of FEA to improve performance.
-- Selected the strengthen structure according to different specifications to improve reliability.
-- Using riveting technology to avoid stress.

Improved wheel
-- Continues improvement:The wheel has the 4rd generation.
-- Compared with the 2rd generation:Performance increased by 5-10% in the same parameters.
-- Compared with the 2rd generation: Noise reduced 2-3 dB(A)in the same parameters.

Advanced process
Inlet venture tube & Front disc:spun process to ensure streamlines aerodynamic characteristics.
Inlet venture tube: replace bell mouth to ensure smooth air flow.
Blades:once punch forming to ensure process quality.
Tooling:dedicated fixture to ensure precise install of the blades.

Feature

Wide performance range
Wheel diameter :300~1000mm
Wheel rotation speed range, easy to select
Pulley can be adjusted turns or replaced, motor is replaceable: fine tone
Fan performance range easily

Housing can be rotated at jobsite
Scroll is fixed by 8 housing bolts ; within limited angle

Spark B resistant construction
Aluminum wheel & inlet Natural explosion resistant
AMCA standard:Spark B

Continuously Welded Housing
Continuously welded housing:rigid structure
Suitable for wet or contaminated air compared with mechanical “pittsburg” lock-seam housing
Will not leak when liquid gathered inside the scroll
Suitable for exhaust wet or grease contaminated air

Easy maintenance
Access doors are available on both sides of motor chamber
One screw driver finishes all electrical and mechanical inspection :easily and quickly
Standard scroll access door available

Suitable for outdoor installation
Optional weather cover: protect the whole drive
Avoid sunshine , rain , snow directly impact on running parts
Climate factor on durability and safety of the outdoor-installed
Fan is reduced

Compact profile

Belt drive : AMCA arrangement 10 (motor is under the shaft). Direct drive: AMCA arrangment 4.
Fan size reduced expensive mechanical room space saved
Belt length reduced and belt life extended
The low center height of scroll leaves more space for duct installation

AMCA Seal:sound and air performance certified
The sound & air performance is approved by AMCA
Sound & Air Performance Seal is applied to each fan

Naming

Naming Convention:

Tech Spec

Fan Type
The fan shall be direct drive and belt drive. Fan wheels are centrifugal, backward inclined, and constructed of aluminum. The inlet Venturi shall have round curved section to smoothly transit the air to the wheel cone. The wheel shall be statically and dynamically balanced to Level G2.5 as per AMCA 204 standard.

Quality Standards
The fan shall be tested in accordance with AMCA Standard 210 and 300 and AMCA licensed according to AMCA Publication 211 and 311 for sound and air performance.  And each fan shall be affixed with AMCA sound and air performance seal. The manufacturer must own the production license for industrial products and ISO9001 quality system authentication.

Fan Structure
The fan housing shall be constructed of steel, the thickness shall be adequate to support drive and motor. The scroll shall be fully welded and shall be provided an access door for removing possible debris inside of the scroll. The fan shall be installed on a stable level platform via vibration isolators. Any pre-embedded fixing devices shall not be required.    

Coating
Fan surface shall be polished and cleaned up to remove particulates, welding slag, burrs, sharp edge, iron, oil, then epoxy coating [options: colour changes are available], 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)
Shaft: Fan shaft shall be heat treated through soaking furnace to the hardness level of HB370, and the surface shall be hard film corrosion treated. The fan shaft shall be balanced together with the wheel, and the shaft design speed shall at least exceed 25% of the maximum fan operation speed.  
Pulleys: Fan pulleys shall be sized for a minimum of 150% of driven power. Pulleys shall be cast iron, keyed and securely attached to the wheel and motor shaft. Motor pulleys shall be adjustable for final system balancing. Conical (QD) type bushing shall be equipped for easy removal of the pulleys. 
Bearing: Two bearings shall be used to support fan shaft to avoid wheel vibration directly applied to motor. The bearings shall be selected for a minimum (L-10) life in excess of 80,000 hours at maximum cataloged operating speed. Bearing type shall be permanently sealed, lubricable pillow block metal ball bearings.  
Drive support: Drives shall be supported by powder coated (corrosion resistant) heavy gauge steel, and mounted on vibration isolators. The belt tension shall be adjusted through motor support plate, the design shall make sure the fan shaft and motor shaft always parallel.  
Protection cover: A shaft/bearing cover and a belt cover shall be provided as standard configuration for indoor application. If the fan is outdoor installed, the motor and other drive parts shall be covered by weatherhood to assure lasting durability.   

Motor
Motor shall be carefully matched to the fan load, IP54, and insulation class F. Motor bearings shall be re-lubricable ball type. Motor and drives shall be out of the air stream to avoid grease or dirt accumulation.

Explosion-proof Structure (Only for explosion-proof type)
Fan shall conform to Spark B explosion-proof structure according to AMCA99 Standard. The wheel and the inlet shall be constructed of aluminum 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 CUS models of INFINAIR.

 

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