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Products

Roof Top Centrifugal Exhaust Fan-RTC

● Wheel Specification: 300~1,000
● Installation: rooftop mounted
● Volume range: 600~52,000 m³/h
● Static pressure range: 100~1,000 Pa
 
● 4G Wind-surfer backward inclined centrifugal wheel,high efficiency,low noise and non-overloading.
● All Aluminum construction,light and high intensity.
● Balance quality grade up to G2.5 (AMCA 204).
● Patented positive cooling technology, motor durability extended.
● Elegant appearance matched with the modern architectural design.
● Various transmission ways for flexible selection and allocation.
● Sound and air performance certified by AMCA international.

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Novel design overturning the tradition
-- Excellent aerodynamic characteristics
-- Leading efficiency and noise advantage
-- Highly efficient area width, no overload

Internationally advanced process is adopted for better conformity with characteristics of the flow field
-- Flow passage components are spin formed, in replacement of the traditional process
-- The blade is formed at one time by pressing, having ensured the processing quality
-- Special machine, mould and tooling design have ensured the molding and positioning precision

Carefully selected materials applicable to fire-fighting and coastal occasions
-- The strength is designed to be 200% of the highest rotating speed, and may fully satisfy the fire-fighting requirement
-- The material is resistant to neutral salt spray, and is widely used in the coastal regions
-- The rigorous experimental tests win trustworthiness.

Wind-Surfer wheel comes to its fourth generation (4G)
-- Continuous improvement, constant promotion
-- Higher energy efficiency, lower energy waste
-- Less noise, more quietness

Whole aluminum alloy, light weight and inborn explosion-proof
-- Metal texture promotes the taste
-- Light weight accounting for only 1/3 of that of the traditional
-- Having reached the highest explosion-proof class SPACK A(AMCA 99)

Feature

Independent motor chamber: extra long lifetime
-- Drive located in an independent chamber, contamination contact free.
-- Suitable for lubrication grease, kitchen grease, dust and VOC exhaust.
-- Stable performance and lifetime longer than 10 years.

Patented in design, practical& artistic
-- Elegant profile design, balanced proportion and sophisticated craftwork.
-- Silver white metallic lustre casing, harmonious with different building colors.
-- Modernize buildings with enhanced taste.
-- Blade falling resistant, prevent condensation falling into room.
-- Even if blades break accidentally, blade pieces shall not fall into inside room without safety guard installation.
-- Condensation will flow along blade to the outside instead of inside, available used in coastal and humid area.

Light: suitable for steel structure roofdeck
-- Housing and wheel: aluminum alloy material.
-- Effectively reduce roof load: investment on steel structure is saved.

Patented positive cooling technology
-- Auxiliary blades suck in air: negative pressure in drive chamber.
-- Fresh cool air continuously pushing in to drive chamber: cool the motor bearing.
-- Motor and bearing life extended effectively.

Widely applied to needs
-- Explosion-proof exhaust, all aluminum construction.
-- Smoke removal application.
-- Coastal high-salt condensation.

Naming

Naming Convention:

Stucture

  • RTC
  • RTC-D
Roof Top Centrifugal Exhaust Fan-RTC
Roof Top Centrifugal Exhaust Fan-RTC-D

Photo

Roof Top Centrifugal Exhaust Fan
 
Roof Top Centrifugal Exhaust Fan

Tech Spec

RTC Technical Specification

Fan Type
Fan shall be rooftop centrifugal exhaust type with aluminum backward inclined centrifugal wheel. 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 AMCA204 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 Material
The fan housing, wheel and curb shall be constructed of aluminum alloy. The exterior color of the fan shall be silver white to be harmony with the building.

Structure
Hood: The hood shall be rigid to bear heavy wind load and protect the fan from leaking of heavy rain or snow melting.
Motor, Drives and Wheel Support Panel: Motor and drives support panel shall use an anti-corrosion treated steel panel. Using the same material as that of the housing is prohibited. The column shall be aluminum stick to make sure the support is stable.
Internal Wiring Conduit: Fan shall be furnished with a conduit to lead the power supply wiring through the curb to the motor chamber. (Limited to non smoke removal type)
Curb cap with Mounting Holes: The roof curb cap shall have pre-drilled holes at its side by which the fan could be fixed.
Galvanized Bird Screen: Galvanized bird screen shall be furnished to protect the fan discharge from birds when the fan is not running.

Fresh Air Cooling Motor

Fresh air shall be induced into the motor chamber from the area without exhaust air to cool the motor. Fresh air shall be induced into the motor chamber via auxiliary wheel blades from the gap below motor cover.

Transmission Device (Only for belt drive type)
Shaft: Fan shaft shall be heat treated through soaking furnace to reach the hardness level of HB250, 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. Motor pulleys shall be adjustable for final system balancing. Conical (QD) type bushings shall be equipped for easy removal of the pulleys.
Bearing: Bearings shall be selected of metallic to avoid vibration directly applied to motor. The motor 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 heavy gauge steel and mounted on vibration isolators. The belt tension shall be adjusted through motor support plate to make sure the fan shaft and motor shaft always parallel.

Explosion-proof Structure (Only for explosion-proof type)
Fan shall conform to Spark A explosion-proof structure according to AMCA99 Standard. Whole aluminum alloy structure 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.
Fire fighting Certification (Only for smoke removal duty)
The fan shall be tested OK in complying with the General Usage Centrifugal Fan technical Specification (China National Standard JB/T 10563-2006). A test report issued by licensed authorities shall be provided. The fan must be tested according to China National Standard GA 211-2009, Fire Fighting Smoke Removal Fan High Temperature Testing Method, running continuously over 30 minutes when the main duct air temperature is 280 degrees centigrade. The high temperature resistance character must be qualified by presenting an official certificate.

Motor
Motor shall be carefully matched to the fan load, IP54, and insulation class F. Motor bearings shall be lubrication-free ball bearing type. Motor and drives shall be out of the air stream to avoid grease or dirt accumulation. Motor chamber shall be fixed through stainless steel clips for easy maintenance.

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 RTC models of INFINAIR.

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