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Centrifugal Fans

Axial Flow Fans

ATEX Fans

Custom Built Fans

Seismic Fans

Nuclear Fans

Specialist Applications

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Our

Capabilities

Unrivalled Range & Performance WITT UK Group’s centrifugal fan programme represents one of the most comprehensive offerings globally, with over 300 impeller designs engineered for optimal performance across diverse industrial applications. Our modular system enables volumes up to 1,000,000 m³/h and pressures reaching 50,000 Pa, achieving efficiencies up to 88%—amongst the highest in the industry. From our Halifax facility, we manufacture fans from 63mm to 2,500mm inlet diameter, serving everything from light commercial ventilation to heavy industrial processes, power generation, and critical safety systems across the UK and worldwide.

Modular Design Philosophy Our revolutionary modular approach means multiple impeller types fit within the same casing design, providing unparalleled flexibility for system modifications and upgrades. This innovative engineering allows operators to adapt to changing process requirements by simply replacing the impeller rather than the entire fan unit—reducing downtime and capital expenditure. With casing thicknesses from 3mm to 20mm and construction in mild steel, stainless steel, aluminium, or exotic alloys, we deliver solutions for standard industrial environments through to extreme conditions including high temperatures, corrosive atmospheres, and seismic zones.

  • Seven casing families (RNZ, LRZ, PRZ, MRZ, HRZ, SRZ, TRZ) covering all pressure ranges
  • Direct drive, belt drive, and coupling drive configurations
  • Single and double inlet/outlet arrangements for space optimisation
  • ATEX certified designs for explosive atmospheres
  • Temperature ratings from -40°C to +500°C continuous operation
  • Seismic and shock-resistant designs for critical infrastructure

Why Choose

Centrifugal Fans

Maximum Efficiency

Delivering up to 88% efficiency with backwards-curved impeller technology and optimised volute designs.

MODULAR FLEXIBILITY

Multiple impellers per casing size enable performance adjustments without complete fan replacement.

PROVEN DURABILITY

Heavy-duty construction and premium materials ensure decades of reliable operation in demanding environments.

Frequently

Asked Questions

What makes WITT centrifugal fans different from competitors?
Our modular design system sets us apart—offering 6-10 different impeller options per casing size. This unique approach provides exceptional flexibility for performance optimisation and future system modifications. Combined with our 88% peak efficiency ratings and comprehensive in-house manufacturing capabilities, we deliver superior total cost of ownership compared to conventional designs.
Centrifugal fans serve diverse sectors including power generation, chemical processing, HVAC systems, marine applications, cement plants, steel mills, and wastewater treatment facilities. Their ability to generate high pressures makes them ideal for systems with significant resistance such as long ductwork, filtration systems, scrubbers, and material handling applications.
Centrifugal fans change airflow direction by 90 degrees, using centrifugal force to generate pressure—ideal for high-resistance systems requiring pressures up to 50,000 Pa. Axial fans move air parallel to the shaft axis, better suited for high-volume, lower-pressure applications. Centrifugal designs typically offer higher pressure capabilities and better performance in dusty environments.
Yes, we manufacture specialised impeller designs (types LQZ11, VPZ) specifically for dust-laden and material handling applications. These feature radial or paddle blades that resist material build-up, reinforced construction for impact resistance, and wear-resistant materials or coatings. Access doors and clean-out provisions facilitate maintenance in challenging applications.
We offer direct drive (motor mounted directly to fan shaft), belt drive (allowing speed variation and motor isolation), and coupling drive (for high-power applications). Each arrangement has specific advantages: direct drive minimises maintenance, belt drive provides speed flexibility, and coupling drive handles high torques whilst allowing precise alignment.
Selection depends on airflow requirement, system resistance, temperature, altitude, and gas composition. Our engineering team uses advanced selection software considering these factors plus noise requirements, space constraints, and efficiency targets. We provide detailed performance curves, acoustic data, and dimensional drawings to ensure optimal selection for your specific application.

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