Dundar CM 21.2D Rare Blade Dust Suction Fan (Single Phase) 2150 m³ 2650 RPM

Product Type : AC/DC

Voltage: 220 V

Wattage: 900 W

RPM: 2650

Airflow: 2150 m³/h

Noise (dB(A)): 70

Weight: 13.7 kg

What is a Dust Extraction Fan?

Applications

• Environments requiring extraction of dusty air
• In applications where axial fans are insufficient for pressure and flow
• General and industrial buildings
• Carpentry shops
• Polishing machines
• Painting facilities
• Factories
• Environments with dust and vapor
• For cooling industrial machines
  (e.g., welding machines, transformers, compressors)

Fan Casing and Impeller

• Radial casing made from cold-drawn high-quality steel
• High corrosion resistance with eco-friendly electrostatic epoxy powder coating
• Standard ISO 1940 dynamic balance test conducted for forward radial impeller, according to EN 60335-2-80 standards
• High-pressure and flow values with nozzle application at the intake
• Cage-protected air intake against foreign objects
• Solid and smooth casing structure with special joint design
• Low Noise Level
• Right and Left side mounting options for desired direction

Motor

• High-quality production using advanced CNC machines
• High heat transfer capacity aluminum frame motor
• Long bearing life with balanced rotor according to ISO 1940 standards
• Insulation class Class F for wide operating range -40° to +70°
• 230 V / 50 Hz Single Phase Fan Motor
• 400 V / 50 Hz Three Phase Fan Motor
• Certified components in compliance with standards
• IP 54 Protection Class (optional IP 55 production possibility)
• Inverter control capability for three-phase fans

Factors to Consider in Fan Selection

• Required Air Flow
• Pressure Loss
• Acceptable Noise Level
• Electrical Power Connection Type

The air exchange needed for the ventilation of a space depends on the usage purpose, the number of occupants and items, and activities within the space. Below, different environments and their required air exchange factors are provided:

For typical activities like smoking, the required air flow increases significantly. Below are some additional values:

• Normal Activity (non-smoking): 29 m³/hour
• Normal Activity (smoking): 58 m³/hour
• Light Activity: 45 m³/hour
• Heavy Activity (industrial working areas): 60 m³/hour

Based on the above information, the required air flow is calculated as follows:
$Q [m³/h] = Air exchange factor (per hour) × Room volume (m³)$

Or

$Q [m³/h] = Number of people × per-person required air flow$

After determining the required air flow, suitable duct design should be made, taking into account noise and air speed criteria. Based on the environment where the fan will be used, the fan type (axial, radial, roof, smoke extraction, etc.) should be selected according to the determined flow-static pressure pair, and the appropriate fan curve should be used.

In the example given, for an office with 5 people working, with a ceiling height of 2.6 meters and a floor area of 50 m², the room has a volume of 130 m³. Using the air exchange factor of 4-8, let’s consider 5 as the average value. Thus, 130 × 5 = 650 m³/hour is required. Assuming normal activity without smoking, the office would need 145 m³ for 5 people. Therefore, the total air requirement for the office would be 650 + 145 = 795 m³/hour. The fan selection is then made based on this flow requirement.

After calculating the flow, the installation area of the fan should be determined—whether it will be mounted on the ceiling, wall, chimney, or ventilation duct. Another important consideration is the voltage of the electricity to be connected to the fan. For office use, single-phase fans (230 V) are preferred, while industrial areas often use three-phase (380 V) fans.