Product Description: Dr.Air BM-302 Mobile Welding Fume Extractor
1. Product Overview

Welding fumes not only harm the respiratory system but also reduce visibility and cause discomfort for workers. The Dr.Air BM-302 is the ideal solution for welding applications, designed to deliver high performance with flexible adjustments.
Configurable as a single or double station, this unit meets diverse user needs. Featuring a multi-stage filtration system (including filter bags, H13 high-efficiency elements, HEPA elements, and specialized gas filters), it effectively removes large particles and extends the lifespan of the main filter components.
2. Structural Design & Specifications
The Dr.Air BM-302 is engineered for superior durability and efficiency. Key components include:
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Main Body:
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Material: Crafted from stainless steel or anti-corrosive materials to withstand harsh working environments.
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Dimensions: Compact design ($540 \times 360 \times 1010$ mm) that fits into workspaces without occupying excessive floor space.
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Suction Fan:
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Power: Available in 800W or 1000W options.
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Performance: Generates strong suction with airflow up to 1000 m³/h or 1200 m³/h, ensuring effective fume removal.
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Motor: Specially designed for quiet operation, minimizing noise pollution.
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Filtration System:
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Core: Available in 100 mm or 150 mm diameters.
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Technology: Integrated PP (Polypropylene) membrane and Activated Carbon, ensuring the removal of fine dust and hazardous pollutants.
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Ducting & Hood:
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Material: High-grade heat-resistant material for continuous operation.
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Design: Flexible suction hood allows for easy angle adjustment to optimize fume capture from any position.
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Control Panel: Simple interface with On/Off buttons and speed adjustment knobs.
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Mobility: Integrated caster wheels allow for easy movement anywhere in the workshop.


3. Working Principle

The Dr.Air BM-302 operates on a multi-stage filtration principle to ensure a safe working environment:
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Suction: The powerful motor draws smoke, fumes, and dust from the welding source into the machine through the extraction arm.
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Primary Filtration (PP Filter): The air passes through the Polypropylene (PP) filter, which captures large particles and debris. This stage protects the subsequent filters and extends their lifespan.
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Secondary/Fine Filtration: The air is then pushed through a high-efficiency plate filter (or HEPA layer depending on configuration) to trap ultra-fine particles that passed through the first stage.
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Recirculation: Cleaned air is discharged back into the environment or recirculated, ensuring safety for workers.

4. Key Features
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Robust Construction: Full metal frame design resists impact and vibration.
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Energy Efficient: The air recirculation system prevents the loss of indoor heating or cooling, saving energy costs.
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Brushless DC Motor: Ensures high power, quiet operation, and a long service life.
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Cost-Effective Maintenance: Filters (PP and Plate) can be replaced independently, reducing the cost of replacing the entire main filter assembly.
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Flexibility: Can operate in single or dual-arm modes with continuous airflow adjustment.
5. Applications
The Dr.Air BM-302 is a versatile device suitable for various industries and spaces:
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Welding: Removes toxic fumes from metal melting and additives.
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CNC Cutting: Extracts smoke, metal dust, and oil mist, protecting machinery and precision optical components.
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Laser Cutting: Filters ultra-fine particles to maintain laser lens cleanliness and accuracy.
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Environments: Ideal for manufacturing workshops, R&D laboratories, vocational schools, and training centers.
6. Usage & Safety Guidelines
To ensure safety and optimal performance, please observe the following:
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Environment: Avoid placing the device in areas with strong magnetic fields, high temperatures, high humidity, or explosive risks.
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Maintenance: Clean and empty the dust collection hopper daily.
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Positioning: Keep the suction hood 10-15 cm away from the smoke source for best results.
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Ducting: Keep the duct length under 1.4 meters and minimize bends. If bends are necessary, make them as wide as possible to maintain suction pressure.
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Power: Turn off the power switch and unplug when not in use for extended periods.





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