This article's table of contents introduction:
- Breakdown of the Name
- Key Features
- Common Applications (Q235 Single Suction High Flow/High Pressure Fans)
- Typical Specifications (Example)
- Important Considerations
- Alternative & Similar Models
It looks like you are referencing a Q235 Single Suction High Air Flow High Pressure Centrifugal Fan. This is a specific type of industrial fan.
Below is a breakdown of what this description means, its common applications, and typical specifications.
Breakdown of the Name
- Q235: This refers to the material of the fan casing and impeller. Q235 is a Chinese standard carbon structural steel (equivalent to ASTM A36 or S235JR). It is strong, weldable, and cost-effective, but offers lower corrosion resistance than stainless steel.
- Single Suction: The fan draws air in from one side of the impeller (as opposed to double-suction which draws from both sides). This is standard for most medium-to-high pressure centrifugal fans.
- High Air Flow: The fan is designed to move a large volume of air (measured in cubic meters per hour, m³/h or CFM).
- High Pressure: The fan generates a significant pressure differential (static pressure, measured in Pa or mmH₂O) to overcome resistance from ductwork, filters, or other system components.
- Centrifugal Fan: Air enters the impeller axially and is expelled radially (outward) by centrifugal force. This design is ideal for high-pressure applications.
Key Features
- Material: Q235 carbon steel (rust-prone, requires painting/powder coating for outdoor use).
- Design: Single inlet, forward-curved or backward-curved blades (forward-curved blades are common for high flow/high pressure in compact sizes; backward-curved blades are more efficient for high pressure in larger systems).
- Drive: Typically belt-driven (variable speed) or direct-driven (constant speed). Belt drive is common for high-flow/high-pressure applications to allow RPM adjustment.
- Performance Curve: Delivers a steep pressure vs. flow curve. As system resistance increases, pressure stays relatively high, but flow drops significantly.
Common Applications (Q235 Single Suction High Flow/High Pressure Fans)
Because of the high pressure and flow, these fans are used in systems with significant backpressure:
- HVAC Systems: Central ventilation, exhaust systems in large buildings, or industrial air handling units.
- Dust Collection: Moving air through long duct runs and baghouse filters.
- Pneumatic Conveying: Blowing or sucking granular materials (wood chips, grain, cement dust) through pipes.
- Industrial Process Air: Combustion air supply, forced draft in boilers, or drying systems.
- Fume Extraction: Removing welding fumes or chemical vapors (if the Q235 is painted or used in dry conditions).
Typical Specifications (Example)
| Parameter | Typical Value | Notes |
|---|---|---|
| Air Flow | 5,000 - 50,000+ m³/h | Depends on size (No. 3.6 to No. 12 or larger) |
| Static Pressure | 1,000 - 5,000+ Pa | Some models can reach 8,000-10,000 Pa (high pressure) |
| Impeller Diameter | 400 mm - 1,200 mm | Larger diameter = higher flow and pressure potential |
| Rotational Speed | 1,450 - 2,900 rpm (Direct) / 800 - 2,000 rpm (Belt) | Belt drive offers more flexibility |
| Motor Power | 5 kW to 55+ kW | High power required for high pressure |
| Temperature Range | -20°C to +80°C (Standard) | 100°C+ possible with special shaft seals/gaskets |
Important Considerations
- Duty Cycle: Is it continuous (24/7) or intermittent? Continuous use requires better bearings (e.g., SKF/FAG) and possibly vibration monitoring.
- Environment: If the air is humid, corrosive, or contains abrasive dust, you may want a stainless steel (SS304/SS316) or a coated Q235 fan instead of bare Q235.
- Sound Level: High-pressure fans are typically louder than low-pressure axial fans. You may need sound attenuators or a sound enclosure.
- Regulation: For variable airflow, a Variable Frequency Drive (VFD) controlled fan saves significant energy compared to damper control.
Alternative & Similar Models
If you are sourcing this fan, it often corresponds to these common Chinese industrial fan models:
- 9-19 Series: High pressure, medium flow (small diameter impeller, high speed).
- 9-26 Series: Very high pressure, lower flow.
- 4-72 Series: Medium pressure, high flow (more efficient, often used for clean air ventilation).
- C6-48 Series: High pressure, designed for dust-laden air (industrial exhaust).
Would you like more specific guidance? I can provide:
- A selection guide for matching a Q235 fan to your system's pressure/flow needs.
- An explanation of how forward-curved vs. backward-curved blades affect your choice.
- A comparison of Q235 vs. SS304 for your specific application (temperature, humidity, corrosiveness).
