1. Product Overview of HTFC Cabinet‑type Centrifugal Fan
1.1 The HTFC cabinet‑type centrifugal fan is a high‑efficiency, low‑noise cabinet‑mounted centrifugal fan. It consists of a low‑noise forward‑curved multi‑blade centrifugal fan, motor, bearings, transmission components, noise‑reducing cabinet and other parts.
Twelve different air‑inlet and air‑outlet orientations are available to accommodate diverse on‑site installation requirements. Two models (Type A and Type B) are offered for fire‑smoke exhaust and general ventilation respectively.
- Type A: Motor is mounted outside the cabinet, designed for fire‑smoke exhaust. It has passed the high‑temperature resistance test conducted by the National Quality Supervision and Inspection Center for Fire‑fighting Equipment in accordance with GA211‑1999 Test Method for High‑temperature Resistance of Fire‑smoke Exhaust Fans, and can operate continuously for more than 60 minutes at 300 ℃.
- Type B: Motor is installed inside the cabinet, for general ventilation and air exchange.
1.2 There are thirteen sizes ranging from 9” to 40”. The air volume ranges from 1650 m³/h to 85000 m³/h, and total pressure ranges from 180 Pa to 1000 Pa.
The HTFC cabinet‑type centrifugal fan is categorized into Type Ⅰ, Ⅱ, Ⅲ, Ⅳ: ‑ Type Ⅰ and Type Ⅲ are single‑speed models. ‑ Type Ⅱ and Type Ⅳ are two‑speed models equipped with dual‑speed motors to realize two‑speed regulation for performance adjustment under different working conditions.
Variable‑frequency motors and frequency controllers are also optional for variable‑frequency speed regulation. The operating frequency is recommended to be locked within 25 Hz‑50 Hz.
1.3 Explosion‑proof version is available with explosion‑proof grade Ex d Ⅱ BT4, suitable for locations with flammable and explosive gas.
1.4 To meet various on‑site noise requirements, silencers of different lengths can be configured. The noise‑reducing cabinet can also be thickened to lower operating noise.
1.5 Primary‑efficiency, medium‑efficiency or high‑efficiency filters can be fitted to improve air cleanliness. Pressure loss caused by filters shall be taken into account, and the cabinet length shall be extended accordingly.
2. Operating Conditions
- Continuous operating temperature: ‑20 ℃ ~ +40 ℃
- High‑temperature resistance: 100 ℃ for continuous operation of 20 hours; 300 ℃ for continuous operation of 60 minutes
- Relative humidity: ＜90 %
- Transport medium: Air
- Power supply: 3‑phase, 380 V / 50 Hz
3. Applications
The fan is widely used for ventilation and smoke exhaust in hotels, restaurants, auditoriums, cinemas, basements, industrial‑mining enterprises, office buildings and other facilities. It is especially suitable for applications requiring low‑noise and large‑air‑volume ventilation & smoke exhaust.
4. Configurations
4.1 Standard Configuration
‑ Impeller ‑ Pulley & belt ‑ Cabinet housing (housing, inlet cone, support bracket) ‑ Belt guard (Type A only) ‑ Motor ‑ Noise‑reducing cabinet ‑ Housed bearing assembly ‑ Motor adjustment rail ‑ Main shaft ‑ Inlet & outlet flanges
4.2 Optional Accessories (Specify upon order)
‑ Vibration‑damping devices ‑ Control box ‑ Silencer ‑ Adapter flange ‑ Filter ‑ Motor rain cover (Type A only)
5. Manufacturing Process
5.1 Fan impellers and housings are made of high‑quality galvanized steel sheet, produced by mould‑based mass production. Riveting and lock‑seam joining processes are adopted. Surfaces are smooth and clean without welding deformation.
5.2 The noise‑reducing cabinet adopts frame‑and‑panel assembly structure. The frame is one‑piece formed by advanced metal cold‑bending machine (aluminum alloy profile is optional upon customer request). Cabinet panels are color‑coated steel sheets with smooth appearance and good corrosion resistance. The inner layer is aluminum foil, and the interlayer is polyurethane foam for enhanced noise reduction. On‑site disassembly and assembly are supported.
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