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Our

Capabilities

World-Class Production Excellence WITT UK Group’s Yorkshire manufacturing facility represents one of Europe’s most advanced fan production complexes, combining 70+ years of engineering heritage with state-of-the-art manufacturing technology. Our 50,000 square foot facility houses comprehensive capabilities including 5-axis CNC machining centres, robotic welding cells, dynamic balancing equipment rated to 50 tonnes, and automated plasma cutting systems. This vertical integration enables complete in-house manufacture—from raw material processing through final assembly and testing—ensuring quality control at every stage. We process diverse materials from standard mild steel to exotic alloys like Hastelloy and Inconel, with thickness capabilities from 1.5mm sheet to 50mm plate. Our production flexibility accommodates everything from one-off prototype fans for research facilities to production runs of thousands for infrastructure projects. Recent investments in Industry 4.0 technology including automated material handling, digital production tracking, and predictive maintenance systems have increased capacity by 40% whilst improving quality consistency. This manufacturing excellence, validated through ISO 9001:2015 certification and witnessed by customers worldwide, ensures every fan leaving our facility meets exacting specifications for performance, reliability, and longevity.

Precision Engineering at Scale Our manufacturing philosophy balances craftsmanship with efficient production, recognising that industrial fans demand both precision engineering and robust construction. The process begins with advanced cutting technology—laser, plasma, and water jet—achieving tolerances of ±0.5mm on components up to 5 metres diameter. Welding excellence, critical for structural integrity and leak-tightness, employs certified welders using TIG, MIG, and submerged arc processes with 100% visual inspection and selective NDT. Our machining centres handle components from tiny instrumentation bosses to massive bearing housings, maintaining concentricity and perpendicularity essential for smooth operation. Assembly areas accommodate fans from 100mm laboratory units to 5-metre tunnel ventilation giants, with dedicated cells for ATEX equipment preventing cross-contamination. Every impeller undergoes dynamic balancing to ISO 14694 Grade G2.5 or better, eliminating vibration and extending bearing life. Final testing in our AMCA-certified facility validates performance—airflow, pressure, power, and noise—ensuring specifications are met before dispatch. This comprehensive capability means we control quality from steel plate to commissioned system, delivering products that routinely exceed 30-year service life in demanding applications.

  • 50,000 sq ft advanced manufacturing facility in Yorkshire
  • Processing from 1.5mm sheet to 50mm plate in various alloys
  • Dynamic balancing to 50 tonnes achieving ISO 14694 G2.5
  • Robotic welding ensuring consistent quality and penetration
  • AMCA-certified test facility validating performance
  • Capacity from single prototypes to thousands of production units

Why Choose

Manufacturing

VERTICAL INTEGRATION

Complete in-house manufacture from raw materials to finished products ensuring quality control.

ADVANCED TECHNOLOGY

Industry 4.0 systems with robotic automation delivering consistent quality and reduced lead times.

PROVEN
QUALITY

ISO 9001:2015 certified with comprehensive testing validating every fan before dispatch.

Frequently

Asked Questions

What manufacturing processes do you employ?
Our comprehensive manufacturing capabilities cover all aspects of fan production. Cutting technologies include 6kW fibre laser cutting steel up to 25mm, high-definition plasma for thicker materials to 50mm, and water jet for heat-sensitive alloys. Forming employs 500-tonne press brakes creating complex geometries, English wheels for curved sections, and specialised rolling for cylindrical casings. Welding capabilities span TIG for stainless steel and critical seams, MIG/MAG for production efficiency, submerged arc for heavy sections, and robotic cells ensuring consistency. Machining centres handle turning up to 3m diameter, milling of complex geometries, and boring of precise bearing housings. Surface treatment includes shot blasting, primer application, and final coating systems. This integrated capability eliminates subcontractor dependency, reducing lead times whilst maintaining quality.
Quality assurance permeates every manufacturing stage through systematic controls and verification. Raw materials arrive with mill certificates verifying composition and properties, with selective PMI testing confirming critical materials. In-process inspection includes dimensional checking at key stages, weld inspection using visual and NDT methods, and assembly verification against drawings. Critical components undergo pressure testing for leak-tightness, run tests confirming mechanical integrity, and vibration monitoring detecting issues. Our quality system maintains full traceability from material receipt through final test, with electronic records enabling rapid investigation if required. Calibrated measuring equipment ensures accuracy, whilst statistical process control identifies trends before they become problems. ISO 9001:2015 certification confirms our quality management system meets international standards, validated through regular third-party audits.
Production capacity flexibly scales to project requirements, from urgent single-unit replacements to major infrastructure projects requiring hundreds of fans. Our facility typically produces 200-300 fans monthly, ranging from small 200mm units to massive 4-metre tunnel fans. Cellular manufacturing enables parallel production streams—standard products, custom designs, and ATEX equipment—preventing bottlenecks. Advanced planning systems optimise material flow and resource allocation, achieving 95% on-time delivery. Quick-change tooling reduces setup times, enabling efficient small-batch production. For large projects, we establish dedicated production cells with specialised tooling and workflow. Strategic material stockholding—particularly long-lead items like motors and bearings—enables rapid response to urgent requirements. This flexibility means we can deliver emergency replacements in days whilst managing year-long infrastructure projects.
Special materials are routine for challenging applications, with extensive experience processing exotic alloys and composites. Stainless steels (304, 316L, duplex, super duplex) provide corrosion resistance for marine and chemical applications. Nickel alloys (Hastelloy, Inconel, Monel) handle extreme temperatures and aggressive chemicals. Aluminium alloys offer lightweight solutions for portable and marine applications. Abrasion-resistant steels (Hardox, Raex) extend life in dusty environments. Special coatings include rubber linings for acid resistance, ceramic coatings for abrasion protection, and PTFE for ultimate chemical resistance. Our welders maintain qualifications for each material group, whilst procedures ensure proper heat treatment and contamination prevention. Material expertise extends to hybrid constructions—stainless impellers in painted casings—optimising cost versus performance.
Large fan assemblies require specialised handling and assembly capabilities which our facility is specifically equipped to manage. Overhead cranes rated to 50 tonnes enable safe manipulation of massive components. Floor-level assembly pits accommodate tall vertical fans without working at height. Specialised fixtures ensure accurate alignment of critical interfaces. Pre-assembly in our facility identifies and resolves issues before site installation, reducing costly field modifications. For oversized units, we design modular construction enabling transport in sections with straightforward site assembly. Documentation includes detailed assembly procedures, match-marking for site alignment, and photographic records of critical stages. Trial assembly confirms fit before surface treatment, whilst witnessed assembly provides customer confidence. This capability extends to complete skid-mounted systems including fans, motors, controls, and auxiliaries—delivered ready for simple connection.
Our AMCA-certified test facility ranks among Europe’s most comprehensive, validating performance before dispatch. Aerodynamic testing to ISO 5801 measures flow, pressure, and efficiency across the operating range. Acoustic testing determines sound power levels per ISO 13347, essential for workplace compliance. Vibration testing confirms balance quality and identifies potential resonances. Mechanical run tests validate bearing temperatures, shaft alignment, and general mechanical integrity. Witness testing enables customer observation of performance validation, particularly important for critical applications. High-temperature testing validates emergency smoke extraction fans to 400°C. Pressure testing confirms casing integrity for gas-tight applications. Material testing includes hardness, PMI, and coating thickness verification. Every test generates certified documentation demonstrating specification compliance. This comprehensive validation ensures fans perform as designed from day one, eliminating site troubleshooting and associated delays.

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