Why Cased Axial Fans Matter
Cased axial fans are vital components in HVAC and industrial air‑flow systems. Their enclosed design with casing ensures efficient and directed air movement with protective housing, improving safety and performance. In commercial buildings, mining environments, and processing plants, selecting the correct casing and impeller configuration ensures longevity, performance, and energy efficiency, key benefits in the demanding South African industrial market.
Key Design Considerations for Cased Axial Fans
- Impeller and Casing Construction
Look for aerofoil aluminium impellers dynamically balanced to ISO 1940‑G6.3, housed in robust casing, often hot‑dip galvanised, to withstand harsh industrial conditions. - Motor Enclosure and Mounting
Fans with IP55-rated motors and Class F or H insulation ensure protection against dust and moisture. Compatibility with direct-on-line or star-delta starting improves flexibility on-site. - Flow Dynamics and Noise
A well-designed fan draws air centrally and discharges axially through its casing, reducing turbulence and noise. Use Majax‑2 performance curves for accurate selection recommendations. - Optional Accessories
Consider inlet/discharge wire screens, shutters, and sound attenuators to meet safety and acoustic requirements.
Common Types of Cased Axial Fans
Cased axial fans are differentiated by their configurations and applications:
Standard Cased Axial Fans
Ideal for general ventilation in industrial and commercial buildings.
Bifurcated Cased Axial Fans (“Majax‑2 Bifurcated”)
Featuring split casing for easier maintenance and compact installation.
High‑Performance Variants
Designed for high static pressure or elevated temperatures, suitable for demanding environments and heavy-duty HVAC systems.
How to Choose the Right Fan
Define your application, determine airflow (m³/h), pressure, and temperature conditions.
Use performance curves, especially Majax‑2, to match the fan to your system’s resistance.
Confirm motor specs: voltage, phase, and insulation class to ensure compatibility.
Account for site conditions, corrosive environments, noise restrictions, or high humidity may require protective accessories or coating.
FAN MOVEMENT – Industrial Air‑Flow Expertise
Fan Movement provides solutions that combine engineered performance with South African reliability. Our cased axial fan range offers precision-balanced impellers, scalable casing designs, and accessories that protect and enhance user experience. From HVAC to mining to processing plants, our products are selected for durability, efficiency, and compliance with industry standards.
“Engineered airflow you can trust.”
