K Series — UTEK-DELE Axial Fan Range

The K Series was developed for one requirement that keeps coming back on industrial equipment: move as much air as possible where the installation space is narrow. The K6Z and K7Z cover an unusually wide 180-1254 mm span with 3 to 16 blades on a single Z-3 hub.

That width comes from the blade profile rather than the hub, so a machine platform can use the same K Series hub and mounting across several fan sizes. For maintenance planning this means fewer spare parts, and for design work it means the cooling concept can be scaled without redesigning the drive interface.

Model Range and Specifications

Blade count is selected against the available drive power and the required airflow, so a wide diameter range can be covered without changing the hub.

Blade Materials and Temperature Range

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

The conductive PAGAS option is supplied for equipment working in explosive-risk atmospheres such as dust or gas. It addresses the working environment of the blade; machine-level certification remains the responsibility of the equipment builder.

Hub Options

Blades are supplied with matched hub sets. The hub carries the blade loads and sets the shaft interface, so it is selected together with the blade count:

Typical Applications

This series is normally specified for the following duties:

• High airflow ventilation with limited installation space

• Cooling of industrial equipment and enclosures

• Dust environments where conductive blades are required

• Platforms that need one hub across several fan sizes

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

Balancing is carried out on a hand laser balancing machine before shipment, and blade sets are recorded against the hub so that replacement parts stay interchangeable.

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 the duty favours low noise over maximum airflow, the sickle-bladed S Series is the closer match from the same hub family.

Related ranges: S Series blades | 7Z Series fan | P Series axial fans | W Series large industrial fans.