30000 m³h Dust Collector Exhaust Fan

This article's table of contents introduction:

1. What the Spec Means
2. Critical Missing Information (You MUST provide this to your supplier)
3. Typical Fan Selection for 30,000 m³/h
4. Key Technical Details for Your Order
5. Safety & Compliance (Crucial for Dust)
6. Typical Price Range (Estimate, 2024)
7. Summary Checklist for Ordering:

This is a request for a 30000 m³/h (cubic meters per hour) dust collector exhaust fan. This is a medium-to-large industrial fan, typically used in woodworking shops, cement plants, grain silos, or metal fabrication facilities.

Here is a breakdown of what this specification means, the critical parameters you need to check, and typical fan options.

What the Spec Means

• 30000 m³/h: The fan moves 30,000 cubic meters of air per hour.
  • Conversion: This equals 500 m³/min or 17,658 CFM (Cubic Feet per Minute).
• Dust Collector: The fan must handle dirty air. This requires a robust, often backward-inclined (BI) or radial paddle wheel design to prevent dust buildup on the blades.
• Exhaust Fan: It is pulling air from the dust collector (baghouse, cartridge collector, or cyclone) and exhausting it to the atmosphere.

Critical Missing Information (You MUST provide this to your supplier)

A fan is defined by CFM (flow) and Static Pressure (resistance). Without pressure, you cannot choose a motor or wheel.

You need to know:

1. Static Pressure (SP): What is the total system resistance? (e.g., 1500 Pa, 2000 Pa, or 4" w.g., 8" w.g.)
   • Low pressure (500-1000 Pa): Simple baghouse or short ductwork.
   • Medium pressure (1500-2500 Pa): Long duct runs, dense dust (wood, grain).
   • High pressure (3000+ Pa): Very fine dust, long runs (cement, pharmaceutical).
2. Dust Type:
   • Wood/Paper: Standard BI or Airfoil wheels (needs spark resistance?).
   • *Abrasive (Sand, Cement, Metal):** Radial paddle wheel (thick steel, wear plates).
   • *Sticky/Fibrous (Textile, Plastic):** Special unshrouded or cut-off wheels.
3. Duct Size (Inlet/Outlet): Usually 500mm to 800mm diameter for this flow rate.
4. Temperature: Ambient, or is it hot exhaust (e.g., >70°C)?

Typical Fan Selection for 30,000 m³/h

Here are three common configurations based on pressure:

Option A: Medium Pressure (Common for Woodworking/Central Systems)

• Type: SISW (Single Inlet, Single Width) Backward Inclined
• Pressure: 1500 – 2000 Pa
• Motor Power: 5 kW to 22 kW (approx. 25-30 HP)
• RPM: ~1200 – 1450 RPM (direct drive) or via pulley.
• Wheel Diameter: ~710 mm to 800 mm
• Use: Central wood chip extraction, medium-duty baghouses.

Option B: High Pressure (For Long Duct Runs or Fines)

• Type: Radial Paddle Wheel (Radial Blade)
• Pressure: 2500 – 3500 Pa
• Motor Power: 30 kW to 37 kW (approx. 40-50 HP)
• RPM: ~1450 – 1800 RPM.
• Wheel Diameter: ~630 mm to 710 mm
• Use: Cement silos, metal grinding, high-static baghouses.

Option C: Low Pressure (Simple Exhaust)

• Type: Axial Fan (Vaneaxial)
• Pressure: 300 – 800 Pa
• Motor Power: 5 kW to 7.5 kW
• RPM: ~1450 RPM.
• Use: Simple ventilation where dust is pre-collected. Not recommended for dust-laden airstreams.

Key Technical Details for Your Order

When you speak to a fan manufacturer (e.g., Greenheck, New York Blower, Howden, or Chinese/Indian brands like Zibo, Nanfang**), give them this data:

1. Volume: 30,000 m³/h
2. Pressure: [e.g., 2000 Pa]
3. Air Density: [Standard 1.2 kg/m³ or higher altitude?]
4. Dust Type: [e.g., Wood chips]
5. Direction of Rotation: [Clockwise or Counterclockwise]
6. Discharge Position: [Top horizontal, Bottom angular, etc.]
7. Drive Type:
   • Direct Drive (D.D.) – Better efficiency, less maintenance.
   • Belt Drive (B.D.) – Allows RPM changes, motor is outside airstream (better for hot/dirty exhaust).
8. Construction:
   • Housing: Heavy-gauge steel (3mm – 6mm).
   • Shaft: Sealed bearings, often with external purge system (EZ Kleen style).
   • Access Door: Required for cleaning.

Safety & Compliance (Crucial for Dust)

Explosion Protection (ATEX / OSHA / NFPA 664 for Wood):

• Since this is a dust collector, there is a risk of dust explosion.
• Must have: Explosion-proof motor (EEx d IIB T4).
• Must have: Spark-resistant construction (stainless steel or non-ferrous tip sealing).
• Must have: Pressure relief vent on the fan housing.
• Should have: Abort gate or backdraft damper.

Sound Level:

• A 30,000 m³/h fan can be very loud (85-95 dB(A)).
• You may require a silencer / sound attenuator on the inlet or outlet.

Typical Price Range (Estimate, 2024)

• Belt Drive, Medium Pressure (BI): $4,000 – $8,000 USD (Motor included, standard steel).
• Direct Drive, High Pressure (Radial): $8,000 – $15,000 USD (Heavy duty, spark resistant).
• Stainless Steel or Explosion Proof: $12,000 – $25,000 USD+

Summary Checklist for Ordering:

Recommendation: Contact a local fan supplier specializing in industrial dust collection (e.g., Camfil, Donaldson, or a regional fabricator). Give them the Pressure number. Without the pressure, the fan will either be too weak (won't move air) or too strong (wastes energy).