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Air Cooling Systems

Air Cooling Systems

Air cooling systems parts covers the components that complete a fan assembly: the drive motor and the taper bush used as the shaft adaptor between hub and shaft.

Air Cooling Systems — UTEK-DELE Axial Fan Range

A fan is more than a blade set. Between the impeller and the machine sit two components that are easy to overlook until a replacement is needed: the drive motor and the taper bush that adapts the fan hub to the shaft.

UTEK-DELE supplies both as part of the air cooling system range, so a fan assembly can be completed or repaired from one source. Because blade, hub and shaft adaptor are matched as a set, the drive components are selected together with the impeller rather than bought separately against a catalogue number.

Model Range and Specifications

ComponentFunction in the assemblyMatched withProduct page
MotorDrives the fan shaft at the working speedBlade count and impeller diameterfan motor
Taper bushClamps the hub to the shaft as a friction adaptorHub family (H, Z or W)Quoted on request

Both components are quoted against the fan assembly they belong to, so the shaft interface and the drive duty stay consistent when a fan is repaired.

Blade Materials and Temperature Range

Blade material is selected from the working temperature and from the atmosphere around the impeller:

MaterialCompositionTemperature rangeTypical duty

Typical Applications

This series is normally specified for the following duties:

  • Completing a fan assembly during build

  • Replacing a failed drive or worn shaft adaptor

  • Keeping spare parts on the same interface across a machine fleet

  • Service kits for cooling towers, gensets and process equipment

Specification Support

When a fan is being specified or replaced, the following points are confirmed before a blade set is released. They are the same checks used for OEM programs and for retrofit projects.

  • Duty point: airflow and static pressure required at the working speed, taken from the cooling pack or ventilation requirement

  • Installation: available diameter, shroud clearance, mounting pattern and the shaft interface of the existing hub

  • Environment: maximum air temperature, dust or gas atmosphere, and whether static discharge has to be avoided

  • Drive: available power, belt or direct drive, and whether the fan has to reverse in service

  • Service: blade weight for handling during maintenance and spare-part availability across the machine fleet

Blade count, profile and material are then matched to those conditions in a fixed order: material first, then blade count, then hub family, with diameter confirmed against the shroud. Working in that sequence keeps the mechanical interface stable when the duty requirement changes later in the project, and it is why the same blade family can often stay in production while the cooling pack is revised.

Quality Assurance and Dynamic Balancing

Drive components are supplied with the same traceability as the blades: the motor duty and the bush size are recorded together with the impeller they were matched to.

Customization and Series Overview

Blade count, blade profile, hub family and material can be customized for OEM programs, and existing fans can be reviewed when airflow, noise or durability has to be improved on a running machine. Where only the impeller is being replaced, the blade and hub set is ordered on its own and the existing drive components are reused.

Related ranges: Equipment and balancing capability | W Series large industrial fans | P Series axial fans | H Series small impellers.

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