Industrial axial fan impellers are balanced blade-and-hub assemblies from 180 mm to 2200 mm, supplied ready to fit so a replacement needs no on-site balancing.
An industrial axial fan impeller is a balanced assembly: the impeller blades mounted on their hub, corrected as one rotating body and supplied ready to fit on a shaft. Treating the impeller as an assembly rather than a set of loose parts is what makes a replacement behave like the original.
UTEK-DELE builds impellers from 180 mm to 2200 mm across the fixed-angle, adjustable-pitch and special blade families. Each impeller is balanced on a hand laser balancing machine before shipment, and the blade count, hub family and pitch setting are recorded so the impeller can be reproduced later without a second balancing campaign.
The impeller is the rotating part of the fan, and every element in it affects balance and airflow:
Impeller blades — moulded PAG or PAGAS, or die-cast aluminium where temperature requires it
The hub that carries the blades — H-6 to H-12, the Z family, or W-3 to W-10
Fasteners and, where used, the taper bush that clamps the impeller to the shaft
The balancing correction applied to the finished impeller
Because the impeller is balanced as an assembly, a spare impeller can be fitted in the field without a balancing rig, which matters on equipment that is serviced away from a workshop.
Balancing is the step that separates an impeller from a collection of blades. It is measured and corrected with the blades mounted, because the assembly is what runs on the machine:
Measurement locates the heavy point of the assembled impeller
Correction brings the impeller and hub into balance
Verification confirms the result before the impeller is released
Recording keeps the setting so a replacement impeller can be matched
The effect is practical rather than theoretical: a balanced impeller runs without the low-frequency rumble that an out-of-balance wheel produces at low speed, and it does not loosen its own fasteners over a service interval.
| Impeller class | Diameter range | Blade count | Hub family | Typical impeller duty |
|---|---|---|---|---|
| Small impellers | 180-745 mm | 5-12 | H-6 to H-12, PMAX plate | Engine cooling, compact cooling packs |
| Medium impellers | 250-1343 mm | 1-16 | Z-3 to Z-18 | Heat exchangers, HVAC, compressors, process cooling |
| Large impellers | 1000-2200 mm | 6-12 | W-3 to W-10 | Cooling towers, generator sets, moving-air units |
The hub family is confirmed with the impeller, never separately: blade mass, shaft diameter and the mounting pattern all have to agree before an impeller can be released for production.
| Material | Composition | Temperature range | Impeller duty |
|---|---|---|---|
| PAG | PA6 with 30% glass fibre | -40 °C to 110 °C | Standard heavy-load impellers |
| PAGAS | PA6 with 15% carbon fibre and 15% glass fibre (conductive) | -30 °C to 100 °C | Impellers for dust and gas atmospheres |
| ALU | Die-cast aluminium ADC12 | -40 °C to 150 °C, short-term 300 °C for 2 h | Impellers for high-temperature zones |
An impeller is normally replaced rather than repaired, and the aim is a part that needs no adjustment after fitting:
The original diameter, blade count and hub family are confirmed from the fan records
The replacement impeller is supplied balanced, with the pitch already set for the duty point
The shaft interface is checked against the existing taper bush or hub fit
The impeller is fitted and the machine returned to service without on-site balancing
Where only the blades are worn, a blade set can be supplied against the existing hub instead of a complete impeller, which is the cheaper route when the hub and shaft are still serviceable.
Each impeller is released with its blade count, hub family, material batch and pitch setting recorded. That record is what allows a second impeller to be built for the same fan later, and it is also how a plant keeps several machines on the same impeller specification even when they were commissioned years apart.
The same approach is used for the industrial axial fan propellers composed of these impellers, and for the individual industrial axial fan blades when only the blades are renewed. Production impellers are listed on the H Series, P Series and Equipment and balancing pages.
The PMAX3 is a special-profile axial fan blade for high static pressure: 180-700 mm with nine blades on the PMAX plate hub, in PAG.
PAGAFR material option: PA6 reinforced with glass fiber and flame-retardant additives. Compared with PAG, PAGAFR includes flame-retardant additives for applications requiring flame-retardant properties.
The PMAX3 is a special-profile axial fan blade for high static pressure: 180-700 mm with nine blades on the PMAX plate hub, in PAG.
PAGAFR material option: PA6 reinforced with glass fiber and flame-retardant additives. Compared with PAG, PAGAFR includes flame-retardant additives for applications requiring flame-retardant properties.
The R4Z is a special-profile axial fan blade for low-noise and corrosion-resistant duties: 299-1011 mm in die-cast aluminium ADC12 on the Z-3 hub.
PAGAFR material option: PA6 reinforced with glass fiber and flame-retardant additives. Compared with PAG, PAGAFR includes flame-retardant additives for applications requiring flame-retardant properties.
The R4Z is a special-profile axial fan blade for low-noise and corrosion-resistant duties: 299-1011 mm in die-cast aluminium ADC12 on the Z-3 hub.
PAGAFR material option: PA6 reinforced with glass fiber and flame-retardant additives. Compared with PAG, PAGAFR includes flame-retardant additives for applications requiring flame-retardant properties.
The 1Z is an adjustable-pitch axial fan blade covering 378-725 mm with 5 to 16 blades on the Z-3 hub, in PAG or conductive PAGAS.
PAGAFR material option: PA6 reinforced with glass fiber and flame-retardant additives. Compared with PAG, PAGAFR includes flame-retardant additives for applications requiring flame-retardant properties.
The 1Z is an adjustable-pitch axial fan blade covering 378-725 mm with 5 to 16 blades on the Z-3 hub, in PAG or conductive PAGAS.
PAGAFR material option: PA6 reinforced with glass fiber and flame-retardant additives. Compared with PAG, PAGAFR includes flame-retardant additives for applications requiring flame-retardant properties.
The 2ZR is an adjustable-pitch axial fan blade on the Z-3 hub in PAG, with 3 to 16 blades and the diameter fixed against the existing fan housing.
PAGAFR material option: PA6 reinforced with glass fiber and flame-retardant additives. Compared with PAG, PAGAFR includes flame-retardant additives for applications requiring flame-retardant properties.
The 2ZR is an adjustable-pitch axial fan blade on the Z-3 hub in PAG, with 3 to 16 blades and the diameter fixed against the existing fan housing.
PAGAFR material option: PA6 reinforced with glass fiber and flame-retardant additives. Compared with PAG, PAGAFR includes flame-retardant additives for applications requiring flame-retardant properties.
The PMAX6 is a special high-pressure axial fan blade on the PMAX plate hub in PAG; diameter and blade count are quoted per project against the cooling pack.
PAGAFR material option: PA6 reinforced with glass fiber and flame-retardant additives. Compared with PAG, PAGAFR includes flame-retardant additives for applications requiring flame-retardant properties.
The PMAX6 is a special high-pressure axial fan blade on the PMAX plate hub in PAG; diameter and blade count are quoted per project against the cooling pack.
PAGAFR material option: PA6 reinforced with glass fiber and flame-retardant additives. Compared with PAG, PAGAFR includes flame-retardant additives for applications requiring flame-retardant properties.
The 1XL is a fixed-angle axial fan blade for small-diameter fans, produced as a replacement blade set with the diameter and blade count confirmed against the existing fan.
PAGAFR material option: PA6 reinforced with glass fiber and flame-retardant additives. Compared with PAG, PAGAFR includes flame-retardant additives for applications requiring flame-retardant properties.
The 1XL is a fixed-angle axial fan blade for small-diameter fans, produced as a replacement blade set with the diameter and blade count confirmed against the existing fan.
PAGAFR material option: PA6 reinforced with glass fiber and flame-retardant additives. Compared with PAG, PAGAFR includes flame-retardant additives for applications requiring flame-retardant properties.
The K7Z is an adjustable-pitch axial fan blade covering 180-1254 mm with 3 to 16 blades on the Z-3 hub, in PAG or conductive PAGAS.
PAGAFR material option: PA6 reinforced with glass fiber and flame-retardant additives. Compared with PAG, PAGAFR includes flame-retardant additives for applications requiring flame-retardant properties.
The K7Z is an adjustable-pitch axial fan blade covering 180-1254 mm with 3 to 16 blades on the Z-3 hub, in PAG or conductive PAGAS.
PAGAFR material option: PA6 reinforced with glass fiber and flame-retardant additives. Compared with PAG, PAGAFR includes flame-retardant additives for applications requiring flame-retardant properties.
The 2H is a fixed-angle axial fan blade for small-diameter fans, supplied as a replacement blade set with the diameter and blade count confirmed against the existing fan.
PAGAFR material option: PA6 reinforced with glass fiber and flame-retardant additives. Compared with PAG, PAGAFR includes flame-retardant additives for applications requiring flame-retardant properties.
The 2H is a fixed-angle axial fan blade for small-diameter fans, supplied as a replacement blade set with the diameter and blade count confirmed against the existing fan.
PAGAFR material option: PA6 reinforced with glass fiber and flame-retardant additives. Compared with PAG, PAGAFR includes flame-retardant additives for applications requiring flame-retardant properties.
The S48Z is an ultra-stiff axial fan blade for high-pressure mobile applications, with the diameter and blade count quoted per project and the Z-3 hub in PAG or conductive PAGAS.
PAGAFR material option: PA6 reinforced with glass fiber and flame-retardant additives. Compared with PAG, PAGAFR includes flame-retardant additives for applications requiring flame-retardant properties.
The S48Z is an ultra-stiff axial fan blade for high-pressure mobile applications, with the diameter and blade count quoted per project and the Z-3 hub in PAG or conductive PAGAS.
PAGAFR material option: PA6 reinforced with glass fiber and flame-retardant additives. Compared with PAG, PAGAFR includes flame-retardant additives for applications requiring flame-retardant properties.
The P4Z is an adjustable-pitch axial fan blade in the P Series (250-1343 mm family, 1 to 16 blades), used for engine radiator cooling where a high cfm assembly fan is required.
PAGAFR material option: PA6 reinforced with glass fiber and flame-retardant additives. Compared with PAG, PAGAFR includes flame-retardant additives for applications requiring flame-retardant properties.
The P4Z is an adjustable-pitch axial fan blade in the P Series (250-1343 mm family, 1 to 16 blades), used for engine radiator cooling where a high cfm assembly fan is required.
PAGAFR material option: PA6 reinforced with glass fiber and flame-retardant additives. Compared with PAG, PAGAFR includes flame-retardant additives for applications requiring flame-retardant properties.
The P5Z is an adjustable-pitch axial fan blade in the P Series, used for radiator and process cooling; documented builds include 900 mm, 12-blade, 48.5 degree configurations in PAG.
PAGAFR material option: PA6 reinforced with glass fiber and flame-retardant additives. Compared with PAG, PAGAFR includes flame-retardant additives for applications requiring flame-retardant properties.
The P5Z is an adjustable-pitch axial fan blade in the P Series, used for radiator and process cooling; documented builds include 900 mm, 12-blade, 48.5 degree configurations in PAG.
PAGAFR material option: PA6 reinforced with glass fiber and flame-retardant additives. Compared with PAG, PAGAFR includes flame-retardant additives for applications requiring flame-retardant properties.
The P6Z is an adjustable-pitch axial fan blade for fans built on the larger Z hubs (Z-7 to Z-18) in the P Series, covering 1 to 16 blades within the 250-1343 mm family.
PAGAFR material option: PA6 reinforced with glass fiber and flame-retardant additives. Compared with PAG, PAGAFR includes flame-retardant additives for applications requiring flame-retardant properties.
The P6Z is an adjustable-pitch axial fan blade for fans built on the larger Z hubs (Z-7 to Z-18) in the P Series, covering 1 to 16 blades within the 250-1343 mm family.
PAGAFR material option: PA6 reinforced with glass fiber and flame-retardant additives. Compared with PAG, PAGAFR includes flame-retardant additives for applications requiring flame-retardant properties.
The PMAX3 is a special-profile axial fan blade for high static pressure: 180-700 mm with nine blades on the PMAX plate hub, in PAG.
PAGAFR material option: PA6 reinforced with glass fiber and flame-retardant additives. Compared with PAG, PAGAFR includes flame-retardant additives for applications requiring flame-retardant properties.
Inquire NowThe PMAX3 is a special-profile axial fan blade for high static pressure: 180-700 mm with nine blades on the PMAX plate hub, in PAG.
PAGAFR material option: PA6 reinforced with glass fiber and flame-retardant additives. Compared with PAG, PAGAFR includes flame-retardant additives for applications requiring flame-retardant properties.
The R4Z is a special-profile axial fan blade for low-noise and corrosion-resistant duties: 299-1011 mm in die-cast aluminium ADC12 on the Z-3 hub.
PAGAFR material option: PA6 reinforced with glass fiber and flame-retardant additives. Compared with PAG, PAGAFR includes flame-retardant additives for applications requiring flame-retardant properties.
Inquire NowThe R4Z is a special-profile axial fan blade for low-noise and corrosion-resistant duties: 299-1011 mm in die-cast aluminium ADC12 on the Z-3 hub.
PAGAFR material option: PA6 reinforced with glass fiber and flame-retardant additives. Compared with PAG, PAGAFR includes flame-retardant additives for applications requiring flame-retardant properties.
The 1Z is an adjustable-pitch axial fan blade covering 378-725 mm with 5 to 16 blades on the Z-3 hub, in PAG or conductive PAGAS.
PAGAFR material option: PA6 reinforced with glass fiber and flame-retardant additives. Compared with PAG, PAGAFR includes flame-retardant additives for applications requiring flame-retardant properties.
Inquire NowThe 1Z is an adjustable-pitch axial fan blade covering 378-725 mm with 5 to 16 blades on the Z-3 hub, in PAG or conductive PAGAS.
PAGAFR material option: PA6 reinforced with glass fiber and flame-retardant additives. Compared with PAG, PAGAFR includes flame-retardant additives for applications requiring flame-retardant properties.
The 2ZR is an adjustable-pitch axial fan blade on the Z-3 hub in PAG, with 3 to 16 blades and the diameter fixed against the existing fan housing.
PAGAFR material option: PA6 reinforced with glass fiber and flame-retardant additives. Compared with PAG, PAGAFR includes flame-retardant additives for applications requiring flame-retardant properties.
Inquire NowThe 2ZR is an adjustable-pitch axial fan blade on the Z-3 hub in PAG, with 3 to 16 blades and the diameter fixed against the existing fan housing.
PAGAFR material option: PA6 reinforced with glass fiber and flame-retardant additives. Compared with PAG, PAGAFR includes flame-retardant additives for applications requiring flame-retardant properties.
The PMAX6 is a special high-pressure axial fan blade on the PMAX plate hub in PAG; diameter and blade count are quoted per project against the cooling pack.
PAGAFR material option: PA6 reinforced with glass fiber and flame-retardant additives. Compared with PAG, PAGAFR includes flame-retardant additives for applications requiring flame-retardant properties.
Inquire NowThe PMAX6 is a special high-pressure axial fan blade on the PMAX plate hub in PAG; diameter and blade count are quoted per project against the cooling pack.
PAGAFR material option: PA6 reinforced with glass fiber and flame-retardant additives. Compared with PAG, PAGAFR includes flame-retardant additives for applications requiring flame-retardant properties.
The 1XL is a fixed-angle axial fan blade for small-diameter fans, produced as a replacement blade set with the diameter and blade count confirmed against the existing fan.
PAGAFR material option: PA6 reinforced with glass fiber and flame-retardant additives. Compared with PAG, PAGAFR includes flame-retardant additives for applications requiring flame-retardant properties.
Inquire NowThe 1XL is a fixed-angle axial fan blade for small-diameter fans, produced as a replacement blade set with the diameter and blade count confirmed against the existing fan.
PAGAFR material option: PA6 reinforced with glass fiber and flame-retardant additives. Compared with PAG, PAGAFR includes flame-retardant additives for applications requiring flame-retardant properties.
The K7Z is an adjustable-pitch axial fan blade covering 180-1254 mm with 3 to 16 blades on the Z-3 hub, in PAG or conductive PAGAS.
PAGAFR material option: PA6 reinforced with glass fiber and flame-retardant additives. Compared with PAG, PAGAFR includes flame-retardant additives for applications requiring flame-retardant properties.
Inquire NowThe K7Z is an adjustable-pitch axial fan blade covering 180-1254 mm with 3 to 16 blades on the Z-3 hub, in PAG or conductive PAGAS.
PAGAFR material option: PA6 reinforced with glass fiber and flame-retardant additives. Compared with PAG, PAGAFR includes flame-retardant additives for applications requiring flame-retardant properties.
The 2H is a fixed-angle axial fan blade for small-diameter fans, supplied as a replacement blade set with the diameter and blade count confirmed against the existing fan.
PAGAFR material option: PA6 reinforced with glass fiber and flame-retardant additives. Compared with PAG, PAGAFR includes flame-retardant additives for applications requiring flame-retardant properties.
Inquire NowThe 2H is a fixed-angle axial fan blade for small-diameter fans, supplied as a replacement blade set with the diameter and blade count confirmed against the existing fan.
PAGAFR material option: PA6 reinforced with glass fiber and flame-retardant additives. Compared with PAG, PAGAFR includes flame-retardant additives for applications requiring flame-retardant properties.
The S48Z is an ultra-stiff axial fan blade for high-pressure mobile applications, with the diameter and blade count quoted per project and the Z-3 hub in PAG or conductive PAGAS.
PAGAFR material option: PA6 reinforced with glass fiber and flame-retardant additives. Compared with PAG, PAGAFR includes flame-retardant additives for applications requiring flame-retardant properties.
Inquire NowThe S48Z is an ultra-stiff axial fan blade for high-pressure mobile applications, with the diameter and blade count quoted per project and the Z-3 hub in PAG or conductive PAGAS.
PAGAFR material option: PA6 reinforced with glass fiber and flame-retardant additives. Compared with PAG, PAGAFR includes flame-retardant additives for applications requiring flame-retardant properties.
The P4Z is an adjustable-pitch axial fan blade in the P Series (250-1343 mm family, 1 to 16 blades), used for engine radiator cooling where a high cfm assembly fan is required.
PAGAFR material option: PA6 reinforced with glass fiber and flame-retardant additives. Compared with PAG, PAGAFR includes flame-retardant additives for applications requiring flame-retardant properties.
Inquire NowThe P4Z is an adjustable-pitch axial fan blade in the P Series (250-1343 mm family, 1 to 16 blades), used for engine radiator cooling where a high cfm assembly fan is required.
PAGAFR material option: PA6 reinforced with glass fiber and flame-retardant additives. Compared with PAG, PAGAFR includes flame-retardant additives for applications requiring flame-retardant properties.
The P5Z is an adjustable-pitch axial fan blade in the P Series, used for radiator and process cooling; documented builds include 900 mm, 12-blade, 48.5 degree configurations in PAG.
PAGAFR material option: PA6 reinforced with glass fiber and flame-retardant additives. Compared with PAG, PAGAFR includes flame-retardant additives for applications requiring flame-retardant properties.
Inquire NowThe P5Z is an adjustable-pitch axial fan blade in the P Series, used for radiator and process cooling; documented builds include 900 mm, 12-blade, 48.5 degree configurations in PAG.
PAGAFR material option: PA6 reinforced with glass fiber and flame-retardant additives. Compared with PAG, PAGAFR includes flame-retardant additives for applications requiring flame-retardant properties.
The P6Z is an adjustable-pitch axial fan blade for fans built on the larger Z hubs (Z-7 to Z-18) in the P Series, covering 1 to 16 blades within the 250-1343 mm family.
PAGAFR material option: PA6 reinforced with glass fiber and flame-retardant additives. Compared with PAG, PAGAFR includes flame-retardant additives for applications requiring flame-retardant properties.
Inquire NowThe P6Z is an adjustable-pitch axial fan blade for fans built on the larger Z hubs (Z-7 to Z-18) in the P Series, covering 1 to 16 blades within the 250-1343 mm family.
PAGAFR material option: PA6 reinforced with glass fiber and flame-retardant additives. Compared with PAG, PAGAFR includes flame-retardant additives for applications requiring flame-retardant properties.
