The Y8-39 and Y9-38 Series Centrifugal Fans are composed of several main components: impeller, casing, air inlet, transmission unit, regulating door, and more.

1. 1. The impeller is constructed from Q345 (16Mn) steel with a combination of long and short forward-curved blades. The impeller undergoes static and dynamic balance testing to ensure smooth and stable operation.
2. 2. The casing is made of welded steel plates, forming a volute-shaped design. A dust removal door is included, allowing for easy cleaning of dust deposits to maintain balance and aerodynamic performance.
3. 3. The air inlet is designed as a streamlined convergent structure and is secured to the front cover assembly with bolts, enhancing airflow efficiency.
4. 4. The transmission unit consists of the main shaft, water-cooled bearing box, and coupling. The main shaft is made from high-quality steel and uses rolling bearings. Two types of bearing boxes are available: integral and split. Models No.4 to No.6.3 use integral bearing boxes, while models No.7.1 to No.16 use split bearing boxes. Water cooling is required for both types, and water consumption ranges from 0.5 to 1m³/h depending on the working and ambient temperatures. The bearing box is equipped with a thermometer and an oil level indicator. L-AN46 total loss system oil is used as the lubricant, with the oil volume based on the indicated level.
5. 5. The regulating door controls the airflow range from fully closed (90°) to fully open (0°). The petal-shaped blades are axially installed in front of the air inlet, and the external transmission structure makes adjustments flexible and easy. For optimal operation, the regulating door should be lubricated with high-temperature bentonite grease, ensuring smooth performance at temperatures up to 260℃.

1. 1. To select the appropriate model, users should refer to the performance table based on the desired airflow and total pressure. Alternative motor types may be chosen if the power and speed specifications are compatible; these details should be noted when placing an order.
2. 2. The total pressure deviation of factory-tested fans should not exceed ±6% at the rated flow rate.
3. 3. The performance of models No.4 to No.6.3 is based on a flue gas temperature of 220℃ and 200℃, an atmospheric pressure of Pa=101325Pa, and a gas density of ρ=0.713 kg/m³ and 0.745 kg/m³. For models No.7.1 and above, performance is calculated with a gas temperature of 200℃ and 175℃, an atmospheric pressure of Pa=10325Pa, and a gas density of ρ=0.745 kg/m³ and 0.784 kg/m³. If operating conditions deviate from these parameters, the performance should be adjusted using the appropriate conversion formula.