Rand Blower’s Dirty Air Fans are specifically engineered to handle air streams containing dust, particulate matter, fibres, chips, abrasive materials, and other contaminants. Rand Blower is the Southern Africa Licensee to Chicago Blower. Their extensive Dirty Air centrifugal fan range is designed for demanding industrial environments, these fans provide reliable, continuous performance while minimising the effects of material build-up, wear, and imbalance.

Unlike clean air fans, dirty air fans are manufactured with radial or radial-tip impellers, which are specifically designed to resist the accumulation of material on the blades. This specialised blade design allows contaminants to pass through the fan more freely, reducing the risk of blockages and maintaining consistent airflow over extended operating periods.

Material build-up on impeller blades can lead to rotor imbalance, increased vibration, premature bearing failure, reduced efficiency, and costly downtime. Rand Blower’s dirty air fan designs actively minimise these risks by combining robust impeller geometry with heavy-duty construction, ensuring reliable performance even in harsh operating conditions.

Our range includes high-efficiency radial-tip fans, which are particularly suited to aspiration systems, scrubber applications, dust extraction, pneumatic conveying, and industrial process ventilation. Each fan is carefully selected and engineered to match the specific characteristics of the material being conveyed, including particle size, dust loading, moisture content, operating temperature, and system pressure requirements.