Installation steps for roof axial flow fans in industrial plants:
1. Foundation verification: Confirm that the reserved holes and embedded parts on the roof match the fan dimensions, and the surface is flat and firm.
2. Bracket fixation: Align the fan base/bracket with the embedded parts, tighten the bolts, and apply anti-rust treatment.
3. Fan positioning: Position the hoisting machine, adjust the horizontal and vertical alignment, and ensure a tight fit with the bracket.
4. Sealing treatment: Apply waterproof sealant to the gaps between the fan and the roof and the base to prevent water leakage.
5. Pipe connection: Connect the air duct and rain cap, fix and seal the interfaces to prevent air leakage and water seepage.
6. Electrical wiring: Connect the power supply and control lines according to the drawings, ensure reliable grounding, and pass the insulation test.
7. Debugging and operation: Power on for a test run, check the speed, noise, and vibration. If no abnormalities are found, the installation is complete.
Roof axial flow fans are typically composed of components such as impellers, casings, motors, bases, wind caps, guide vanes, and louvered dampers. The impeller is the core component, responsible for driving air flow; the casing supports and protects the internal components; the motor provides power for the rotation of the impeller; the base is used to fix the fan; the wind cap, guide vanes, and louvered dampers optimize the airflow and prevent rain and wind from flowing back. By driving the impeller to rotate with the motor, the blades on the impeller push the air, causing it to flow along the axis of the fan, forming an axial airflow, thereby achieving the exchange of indoor and outdoor air and the purpose of ventilation and air exchange.
Characteristics of Roof Axial Flow Fans
High ventilation efficiency: They can generate a large air volume and quickly and effectively achieve the circulation of indoor and outdoor air, meeting the ventilation requirements of buildings.
Low noise: Through measures such as optimizing blade design and motor selection, the noise generated by roof axial flow fans during operation is relatively low and will not cause excessive disturbance to the surrounding environment.
Good corrosion resistance: Some roof axial flow fans have components such as impellers and casings made of corrosion-resistant materials like fiberglass reinforced plastic and aluminum alloy, which can resist the erosion of harsh weather and chemical substances and are suitable for various environments.
Aesthetic appearance: With a simple and smooth design, the wind caps, guide rings and other components are aesthetically designed and can be coordinated with the appearance of buildings, without affecting the overall aesthetic appeal of the buildings.
Easy installation: The structure is relatively simple, the weight is light, and the installation process is relatively simple. They can be directly installed on the reserved openings on the roof or installed through brackets and other methods.
Roof Axial Flow Fan Types
DWT-I Type: This type features large air volume, low noise, high efficiency, light weight, smooth operation, and an attractive appearance. It can be made into anti-corrosion and explosion-proof types. It is suitable for air supply and exhaust in power plants, chemical plants, rubber factories, pharmaceutical companies, food processing plants, metallurgical plants, warehouses, and other industrial enterprises as well as high-end civil buildings. The fan sizes range from 3# to 24#, with air volumes from 1450 to 220800 m³/h and total pressures from 62 to 330 Pa.
ZTF-W Series: The noise of all models in this series can be controlled within 60 (A) decibels. They are characterized by high efficiency, corrosion resistance, light weight, and reliable operation. They are widely used for local and general exhaust in various industrial buildings such as substations, factories, and buildings. They are particularly suitable for places like hotels, schools, hospitals, theaters, or areas near residential areas where low noise is required.
RAF Type: It adopts conical hubs and twisted wing-shaped blades, making it suitable for ventilation and air exchange in medium and low pressure, high flow rate scenarios. It has the advantages of large air volume, high pressure, low power consumption, light weight, and compact structure. It can be made into anti-corrosion and explosion-proof types and is widely used in workshops and factory buildings in industries such as machinery, chemical engineering, rubber, pharmaceuticals, and light textiles, as well as for roof ventilation and air exchange in high-end civil buildings.
