Industrial Axial Fan Propellers — UTEK-DELE Axial Fan Range

An industrial axial fan propeller is the complete air-moving unit: the blades, the hub that carries them and the balanced assembly that mounts on the drive shaft. Buying a propeller rather than a loose set of blades is what keeps airflow, noise and the shaft interface under control in a single specification.

UTEK-DELE manufactures axial fan propellers from 180 mm up to 2200 mm, as fixed-angle and adjustable-pitch units, in moulded PAG, conductive PAGAS or die-cast aluminium. Every propeller leaves the workshop balanced, with the blade count, hub family and pitch setting recorded so a replacement propeller behaves like the one it replaces.

What an Industrial Fan Propeller Includes

A propeller is treated as one part because the parts only work together:

• Propeller blades — moulded or die-cast, in the blade count set by the duty point

• A matched hub — H-6 to H-12 for small propellers, the Z family for medium, W-3 to W-10 for large units

• The assembled and balanced unit, with the pitch set at assembly

• A shaft interface that matches the drive on the machine

Because blade and hub are matched before balancing, a propeller can be fitted without a balancing procedure on site, and a spare propeller is a drop-in part rather than something that has to be trimmed in the field.

Propeller Sizes and Hub Options

Diameter sets the air volume a propeller can move at a given speed, and blade count sets how much of that volume is turned into static pressure. Large low-speed propellers move a high volume with little pressure; smaller fast propellers do the opposite. That single relationship decides most propeller selections.

Propeller Materials and Temperature Limits

Where Industrial Fan Propellers Are Used

Propellers from this range are specified wherever air has to be moved continuously at moderate speed:

• Cooling towers and large heat exchangers, where a big slow propeller is more efficient than a small fast one

• Livestock houses and industrial ventilation, where noise and power consumption matter

• High performance moving-air units and generator set cooling packages

• Off-highway engine cooling where the propeller has to survive dust and high ambient temperature

Choosing a Propeller for an Air-Moving Duty

Selection follows the same order every time, because changing a later step usually means going back to the first:

• Diameter — fixed by the shroud or the fan ring available on the machine

• Airflow and static pressure — the duty point the propeller has to meet at the working speed

• Blade count — raised for pressure, lowered for airflow and lower blade-passing noise

• Material — decided by the maximum air temperature and whether static discharge has to be avoided

• Hub and shaft interface — confirmed against the existing drive before the propeller is released

For slow, large propellers the limit is normally mechanical: blade mass and hub rating set the maximum diameter that can be carried at the working speed, which is why large propellers are always quoted with their hub rather than as blades alone.

Propeller Balancing and Quality Assurance

Every propeller is balanced on a hand laser balancing machine before shipment. On a 2200 mm unit this is not cosmetic: imbalance grows with diameter and blade mass, and it shows up as vibration, fastener loosening and bearing wear long before anything looks broken. The blade count, hub family and pitch setting are recorded for each propeller so a replacement can reproduce the original duty point.

Where a propeller is being replaced, the original diameter and blade count are confirmed first. Keeping those two values while matching the hub interface is normally enough to restore the airflow the machine was designed for.

Related Blade and Impeller Pages

The individual parts behind a propeller are covered on the separate pages for industrial axial fan blades (blade geometry, count and materials) and industrial axial fan impellers (balanced blade and hub assemblies). Production propellers in the large class are listed on the W Series, U Series and 9W axial fan pages.