9-35 & Y9-35 Industrial Boiler Draft and Induced Draft Centrifugal Fans

The 9-35 and Y9-35 Series Industrial Boiler Draft and Induced Draft Fans are specifically designed for ventilation and induced draft applications in steam refineries with capacities ranging from 2 to 240 t/h. These high-performance centrifugal fans ensure optimal airflow and pressure control in boiler systems, contributing to stable combustion and improved efficiency. The series includes both single-suction and double-suction models, making them suitable for a variety of industrial steam applications.

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Durability: Vinylester resin, UV protection, extended service life.
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Easy Maintenance: Oil bath bearings, heat/corrosion resistant, cost-effective.
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High aerodynamic efficiency, low noise, corrosion resistance.
Medium temp range: -20℃ to 80℃, ≤ humidity, ≤ 100mg/m3 dust content.
Durable Fiberglass Build: Ensures long-lasting performance.
Ethylene-based fiberglass blades optimize airflow.

9-35 & Y9-35 Industrial Boiler Draft and Induced Draft Centrifugal Fans

Application

The 9-35 and Y9-35 Series Boiler Draft and Induced Draft Fans are widely used in steam refinery systems with capacities from 2 to 240 t/h. The basic model for the draft fan is labeled as "9-35", while the induced draft fan is labeled as "Y9-35". These fans are available in both single-suction and double-suction configurations, making them ideal for ventilation and exhaust systems in industrial boilers.

Structural Characteristics

1. Transmission Mode: The transmission system utilizes a coupling to connect the motor. Single-suction fans are categorized as type D, and double-suction fans are categorized as type F, ensuring stable and reliable transmission of power.
2. Impeller Design: The impeller is constructed with forward-curved blades, a conical front disc, and a flat rear or middle disc. The blades are riveted to the shaft disc to increase stability and resistance to wear. For the induced draft fans, thicker blades and reinforced parts at the blade roots are used to extend service life under harsh operating conditions.
3. Transmission Part: The main shaft is made of premium steel, and rolling bearings are used in all models. The bearing box is equipped with a thermometer and oil level indicator for monitoring, and the induced draft fans have an additional cooling water system for effective heat management.
4. Casing Design: The casing is a spiral structure welded from steel plates, offering durability and protection against wear. A replaceable lining is added to the spiral plate of the induced draft fans, making maintenance easier and more cost-effective.
5. Flow Regulation: Single-suction induced draft fans are equipped with eight petal-type regulators at the air inlet, while double-suction induced draft fans use four simple flow regulators on both sides of the air inlet boxes to control airflow.

Performance and Selection

1. Select the appropriate fan model based on the flow rate and total pressure from the performance curve.
2. Choose the matching motor based on the performance selection table, ensuring the motor specifications meet the requirements for power and efficiency.
3. The performance table divides the operational range into eight performance points, each corresponding to 90% of the maximum efficiency, depending on the flow rate.
4. For standard air conditions, the performance of the 9-35 type fan is calculated based on a gas temperature of t=20℃, atmospheric pressure of Pa=101300Pa, and gas density of ρ=1.2kg/m³. For induced draft fans (Y9-35 type), the performance is calculated under flue gas conditions at t=200℃, atmospheric pressure of Pa=101300Pa, and gas density of ρ=0.745kg/m³.
5. Most motors in the performance selection table operate on low voltage (220~380V). If a high voltage motor (above 3000V) is needed, the motor capacity must not be lower than the power required in the table.

The 9-35 and Y9-35 Series Boiler Draft and Induced Draft Fans are designed to deliver robust and efficient air management in steam refinery systems. These fans support stable airflow and pressure control, enabling optimal boiler operation under varying conditions. Their advanced design and durable construction make them an excellent choice for power plants and other industrial applications requiring high efficiency and reliable performance.

Rotating Speed (r/min)	Full Pressure /Pa	Air Flow (m³/h)	Fan Power /kW	Motor Power /kW
9-35-11 No.6D
1450	1912 2000 2059 2098 2108 2108 2079 1990	3710 4640 5570 6500 7430 8360 9290 10220	3.84 4.79 5.76 6.54 7.57 8.58 9.83 10.87	4 7.5
				11
960	833 872 902 921 921 921 912 872	2460 3070 3690 4300 4910 5530 6140 6750	1.29 1.495 1.82 2.15 2.47 2.59 2.98 3.29	3
				4
9-35-11 No.8D
960	1490 1549 1598 1627 1637 1637 1608 1539	5810 7270 8720 10180 11630 13080 14540 16000	4.68 5.81 6.73 7.93 9.2 10.4 11.9 13.17	7.5 7.5 7.5 11 11 11 15 15
730	863 902 931 941 951 951 931 892	4430 5540 6650 7760 8870 9980 11090 12200	2.24 2.57 3.12 3.66 4.26 4.81 5.48 5.82	4 4 4 4 5.5 5.5 5.5 7.5
9-35-11 No.10D
960	2324 2432 2510 2549 2569 2569 2520 2412	11350 4200 7050 19900 22750 25600 28400 31250	13.65 17.05 20.7 24.3 28.2 32 36.6 40.25	15 18.5 22 30
				37
730	1353 1412 1451 1480 1490 1490 1461 1402	8650 10800 13000 15150 17300 19450 21600 23800	6.07 7.53 9.12 10.73 12.45 14.15 16.1 17.84	17
				15
				18.5

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FAQ

Q: What information is required to request a quotation?: A: To provide a quotation, we would need the following parameters: Airflow, Pressure, Power, Voltage, and Temperature.

Q: How long does it take to receive a quotation?: A: How long does it take to receive a quotation?

Q: Can Decent team assist with the installation process?: A: Absolutely! We have extensive experience in providing installation services to numerous customers. Rest assured, we can handle the installation work for you without any issues.

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