Corrosive fumes can damage or destroy materials over time. Substances like sulphuric or hydrochloric acids can erode fan components if the materials are not suited for the task.
For the safe extraction of corrosive fumes, fans should be made from chemical-resistant materials, typically polypropylene, which can withstand harsh chemical gases passing through the scroll and impellers.
Key considerations:
Motor placement: Keep the motor out of the airstream to prevent overheating and extend lifespan
Ductwork protection: Ducts should offer the same corrosion resistance as the fan components
Smaller storage units: If materials are non-corrosive, an axial fan can be used
ATEX certification: Ensure fans in hazardous areas are certified, with motors able to withstand gases, fumes, or mists
Flammable gases are denser than air and can accumulate at floor level
Ventilation systems should be designed to effectively extract low-level gases to reduce hazards
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