This article's table of contents introduction:
- Breakdown of the Model Number: 9-19-10D
- Key Characteristics of a 9-19 Series Fan
- Typical Applications
- Typical Parameters for a 9-19-10D Fan
- Important Considerations
- Summary
The term "9-19-10D High-Pressure Centrifugal Fan" refers to a specific model of industrial fan used for moving air or gas against high resistance (high static pressure).
Here is a detailed breakdown of what this designation means and the fan's typical specifications.
Breakdown of the Model Number: 9-19-10D
This follows a standard Chinese naming convention for industrial centrifugal fans (GB/T 3235 standard).
- 9: This indicates the pressure coefficient. For the "9" series, this is a high-pressure fan. The higher the number, the higher the pressure the impeller design can generate.
- 19: This is the specific speed of the fan. A value of 19 is very low, which means it is designed for high pressure and relatively low flow rate.
- 10: This is the impeller diameter in decimeters (dm). Therefore, the impeller diameter is 10 dm = 1,000 mm (or ~39.4 inches) .
- D: This indicates the drive type or coupling method. "D" means the fan impeller is directly driven by the motor via a flexible coupling. The motor shaft and the fan shaft are aligned and connected. (Other common types: A - motor direct mounted on impeller, C - belt driven, E - belt driven with bearings).
Key Characteristics of a 9-19 Series Fan
- Type: Centrifugal fan (forward-curved or radial blades, depending on the specific sub-model, often radial tip or high-pressure backward inclined).
- Pressure: High static pressure (typically up to 15,000-20,000 Pa or more for smaller sizes, but for a size 10D, expect a maximum pressure in the range of 5,000 - 10,000 Pa depending on motor power and speed).
- Flow Rate (Air Volume): Moderate to low relative to its size. For a 10D, typical flow ranges from 10,000 to 30,000 m³/h (approx. 5,900 to 17,700 CFM) depending on the actual speed (RPM).
- Speed: Depending on the motor (typically 4-pole or 2-pole), the impeller speed is usually in the range of 1450 RPM or 2900 RPM. A 10D fan typically runs at 1450 RPM (or lower) to manage power and noise.
- Efficiency: Generally lower than airfoil or backward-inclined fans, but rugged and reliable for tough applications.
Typical Applications
These fans are specifically designed for applications requiring forced ventilation or pneumatic conveying against high resistance.
- Boiler Forced Draft (FD Fans): Pushing air into boilers, furnaces, and heaters.
- Pneumatic Conveying: Moving materials like grain, cement, wood chips, or dust through ductwork.
- High-Resistance Duct Systems: Where long duct runs, many bends, or restrictive filters are present.
- Industrial Ventilation: For mines, tunnels, and factories needing to overcome high static pressure.
- Burning & Drying Systems: For industrial ovens and dryers.
Typical Parameters for a 9-19-10D Fan
| Parameter | Typical Value (Approximate) | Notes |
|---|---|---|
| Impeller Diameter | 1000 mm (39.4") | 10 dm |
| Flow Rate (Q) | 15,000 - 25,000 m³/h | Highly dependent on RPM & system resistance |
| Static Pressure (P) | 5,000 - 8,000 Pa (500-800 mmH₂O) | Depending on speed and air density |
| Speed (RPM) | 1450 - 1800 RPM | Usually driven by a 4-pole motor (1470 RPM) |
| Motor Power | 37 kW to 75 kW (often 45-55kW) | Matched to meet the fan curve at design point |
| Drive Type | D (Direct Coupled) | Motor shaft -> Coupling -> Fan Shaft |
| Outlet Direction | Rotatable | Can be adjusted (e.g., 0°, 45°, 90°, 180°) |
Important Considerations
- Motor Speed: A "D" drive fan runs at motor speed. A 2-pole motor (~2950 RPM) on a 10D fan would require an enormous motor (likely 200+ kW) and is impractical for most applications due to structural limits. A 4-pole motor (~1470 RPM) is standard.
- Sound Level: These high-pressure fans are very loud. Noise dampening or hearing protection is usually required.
- Dynamic Balance: The impeller (1000mm) is large. It requires excellent dynamic balancing to run smoothly without damaging bearings or the structure.
- Shaft Seals: For high-temperature or hazardous applications (like boiler FD), you will need appropriate shaft seals and possibly a cooling fan for the motor.
Summary
The 9-19-10D High-Pressure Centrifugal Fan is a large, robust, direct-drive industrial fan with a 1000mm diameter impeller. It is designed for high pressure, relatively low volume air movement, typically used in boiler systems, pneumatic conveying, and high-resistance ventilation systems. It is heavy, loud, and energy-intensive (typically 37-75 kW).
