Dust Extraction and Filtration Fan
A dust extraction fan is the driving force of every filtration system.
At the heart of any dust extraction system, the dust extraction fan creates the suction that captures dust and conveys it to the filter. MECAVENT supplies all types of fans for these applications: impeller diameters from 250 to 2,500 mm, installed power from 0.25 kW to 800 kW, mounted before or after the filter.
Each fan is sized with the rest of the installation: discover our industrial dust collectors, bag and cartridge filters, as well as our welded ducts.
Upstream of the filter: anti-abrasion fan
Placed before the dust collector, the fan conveys dust-laden air that quickly wears out the impeller and volute. MECAVENT designs it to last: wear plates on the volute, removable or not, and blade reinforcements in Vautid or Castolin.
Downstream of the dust collector: high-efficiency fan
Placed after the filter, the dust extraction fan handles clean air. It can then be optimized for efficiency: profiled impeller blades, reduced power consumption and, optionally, a frequency inverter to adjust the flow rate to filter clogging.
A dust extraction fan adapted to your dust types
Wood, metals, flour, mineral powders, fumes: each type of dust imposes its own constraints. We choose the impeller type according to the fan’s position in the installation: radial blades, robust and less sensitive to fouling, for dust-laden air; backward-inclined blades, high-efficiency, for filtered air. Materials and anti-wear protections are defined according to the abrasiveness, temperature, and humidity of the gases.
Dust Extraction and ATEX
Many dusts are combustible: wood, flour, sugar, fine metal powders. The areas concerned are then classified as ATEX, and the dust extraction fan must comply with Directive 2014/34/EU, in the category corresponding to the zoning defined by the operator. We supply ATEX fans, with a construction limiting the risk of sparks and complete earthing.
Stable flow, controlled consumption
The pressure drop of a filter increases as the bags or cartridges become clogged. With a frequency inverter, the fan maintains a constant suction flow rate and consumes only the necessary energy.
Frequently Asked Questions
Should the fan be placed before or after the filter?
After the filter, the fan handles clean air: it can be optimized for efficiency and experiences little wear. Before the filter, it is exposed to dust and must be designed to resist abrasion. The choice depends on the process, the nature of the dust, and the location.
What information is needed to size a dust extraction fan?
The air flow rate to be extracted, the pressure drop of the network and the filter, the nature and concentration of the dusts, the gas temperature, and any ATEX classification.
Can you renovate a worn dust extraction fan?
Yes: replacement or recharging of the impeller, wear plates, rebalancing. Discover our industrial fan renovation services.
A complete dust extraction system
MECAVENT sizes and supplies the entire chain: capture, welded ducts, dust collector/en/industrial-dust-collectors-and-ductwork/, fan, silencer, and control. Discover our turnkey solutions.
Dust extraction fan: sized for your filter and your dust
The dust extraction fan determines the performance of the entire filtration system. If it is undersized, dust escapes at the capture points; if it is oversized, it wastes energy and shortens filter life. MECAVENT sizes each dust extraction fan according to the required capture velocities, the pressure loss of the ducts and of the filter at the end of its cleaning cycle, and the characteristics of the dust.
Depending on the position of the fan, clean side or dirty side of the filter, we select the right impeller: backward-curved for clean air after the filter, radial or open paddle wheels for dust-laden air. For abrasive dust, impellers and casings are fitted with wear plates or made from wear-resistant steel.
ATEX dust extraction fans
Wood, flour, sugar, plastics and metal dusts can form explosive atmospheres. We supply ATEX dust extraction fans with non-sparking materials, suitable motors and earthing, for zones classified under Directive 1999/92/EC on explosive atmospheres at work.
Complete dust extraction systems
Together with the dust extraction fan, we supply dust collectors, welded ductwork, silencers and flexible connectors, and we commission the complete system on site, with airflow measurements at each capture point.