Industrial Fan Repair Services
LH Marthinusen is a trusted specialist in industrial fan repair, delivering high-performance restoration solutions for critical fan assets in power generation, mining, cement, steel, petrochemical, and heavy industrial applications across Southern Africa and beyond.
Our dedicated fan repair division focuses on restoring mechanical integrity, ensuring safe operation, and returning fans to reliable, full-spec airflow performance — all while minimising unplanned downtime and maximising asset life. Every repair is carried out to OEM-equivalent standards in our ISO 3834-certified workshops, using advanced diagnostics, precision engineering, and proven wear-protection technologies.
Key Repair & Restoration Capabilities
Power Station ID and FD Fans
Specialised repairs on Induced Draft (ID) and Forced Draft (FD) axial fans commonly found in coal, gas, and combined-cycle power stations. We address typical damage modes including severe erosion, fly-ash abrasion, blade imbalance, excessive vibration, bearing wear, fatigue cracking, and corrosion pitting — restoring fans to original aerodynamic and structural performance.
Centrifugal Fan Repairs
Comprehensive overhaul of large centrifugal fans, including full restoration or replacement of impellers, casings, inlet cones, shafts, hubs, and rotating assemblies. Detailed engineering inspections and NDT (non-destructive testing) confirm structural integrity, dynamic balance, and safe long-term operation under high-temperature, high-pressure, or corrosive conditions.
Impeller Repair and Manufacture
Repair of damaged centrifugal impellers (backward-curved, radial, forward-curved) or full manufacture of replacement impellers when repair is not viable. All work is performed in our ISO 3834-certified facility with tight dimensional control, material traceability, weld procedure qualification, and post-weld heat treatment where required — ensuring compliance with international fabrication standards and seamless integration into existing fan systems.
High-Capacity Balancing
In-house, state-of-the-art balancing facilities capable of handling components up to 4 metres in diameter and 20 tonnes in weight. Precision balancing to ISO 1940 G2.5 (or finer) tolerances significantly reduces vibration, extends bearing and coupling life, lowers energy consumption, and improves overall system reliability.
Mining & Abrasive-Environment Fan Repairs
Expert repair and refurbishment of axial auxiliary, main surface, booster, and bulk air cooler fans used in underground and surface mining operations. We specialise in addressing blade tip wear, leading/trailing edge erosion, corrosion attack, and structural fatigue caused by dust-laden, abrasive, and humid conditions. Advanced wear-protection solutions include ceramic tiling, hardfacing overlays, polyurethane coatings, and replaceable liners to dramatically extend service intervals in harsh environments.
Additional Value-Added Services
By choosing LH Marthinusen for fan repairs, operators benefit from reduced total cost of ownership, improved plant availability, lower energy costs through restored efficiency, and compliance with safety and environmental regulations. We don’t just fix fans — we engineer extended life and performance you can rely on.
Contact our Fan Division today for a no-obligation assessment of your fan assets.
