7Z High-Performance Explosion-proof fan For Optimal Airflow Efficiency
The 7Z is an adjustable-pitch axial fan blade covering 560-922 mm with 5 to 16 blades on Z-3, Z-5 or Z-7 hubs, in PAG, conductive PAGAS or die-cast aluminium.
The 7Z Series is a medium-diameter axial fan covering 560-922 mm with 5-16 blades, available in PAG, PAGAS or ALU on Z-3, Z-5 and Z-7 hubs, including conductive blades for dust and gas atmospheres.
The 7Z Series covers the heart of the medium-diameter range: 560-922 mm with 5 to 16 blades. It is the model most often specified when an existing medium fan has to be replaced without changing the shaft, shroud or mounting pattern, because the Z hub interface is shared across the family.
The conductive PAGAS material option makes the series suitable for equipment working in dust or gas atmospheres where static discharge has to be avoided, while PAG remains the standard choice for heavy-load cooling and ALU is used where air temperature is the limiting factor.
| Model | Blade angle | Blade count | Diameter range | Blade materials | Hub options | Product page |
|---|---|---|---|---|---|---|
| 7Z | Adjustable | 5-16 | 560-922 mm | PAG / PAGAS / ALU | Z-3 / Z-5 / Z-7 | 7Z axial fan |
A utility model patent covers the explosion-proof fan blade design used for conductive duty (CN 222315403 U).
Blade material is selected from the working temperature and from the atmosphere around the impeller:
| Material | Composition | Temperature range | Typical duty |
|---|---|---|---|
| PAG | PA6 with 30% glass fibre | -40 °C to 110 °C | Heavy-load cooling, anti-aging, general engine cooling |
| PAGAS | PA6 with 15% carbon fibre and 15% glass fibre (conductive) | -30 °C to 100 °C | Dust and gas atmospheres where static discharge must be avoided |
| ALU | Die-cast aluminium ADC12 | -40 °C to 150 °C, short-term 300 °C for 2 h | High-temperature and fire-resistance zones |
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.
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:
| Hub type | Weight | Hub diameter |
|---|---|---|
| HUB Z-3 | 0.74 kg / set | 190 mm |
| HUB Z-5 | 0.86 kg / set | 157 mm |
| HUB Z-7 | 0.86 kg / set | 194 mm |
| HUB Z-12 | 2.045 kg / set | 285 mm |
| HUB Z-16 | 3.64 kg / set | 385 mm |
This series is normally specified for the following duties:
Replacement of medium-diameter industrial fans
Cooling in dust and gas atmospheres
Heat exchangers and process cooling
Equipment where conductive blades are specified
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.
Impellers are balanced on a hand laser balancing machine before shipment and the blade material batch is recorded against the model, which keeps a replacement set matched to the original.
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. Larger duties in the same technical approach are covered by the W Series, which uses the W hub family from 560 mm up to 2200 mm.
Related ranges: S Series sickle blades | P Series adjustable fans | K Series big airflow fans | W Series large fans.
The 7Z is an adjustable-pitch axial fan blade covering 560-922 mm with 5 to 16 blades on Z-3, Z-5 or Z-7 hubs, in PAG, conductive PAGAS or die-cast aluminium.
The 7Z is an adjustable-pitch axial fan blade covering 560-922 mm with 5 to 16 blades on Z-3, Z-5 or Z-7 hubs, in PAG, conductive PAGAS or die-cast aluminium.
The 7XL is an adjustable-pitch axial fan blade for a wide 250-1040 mm range with 3 to 16 blades on the Z-3 hub, in PAG or die-cast aluminium ADC12.
The 7XL is an adjustable-pitch axial fan blade for a wide 250-1040 mm range with 3 to 16 blades on the Z-3 hub, in PAG or die-cast aluminium ADC12.
The 7Z is an adjustable-pitch axial fan blade covering 560-922 mm with 5 to 16 blades on Z-3, Z-5 or Z-7 hubs, in PAG, conductive PAGAS or die-cast aluminium.
The 7Z is an adjustable-pitch axial fan blade covering 560-922 mm with 5 to 16 blades on Z-3, Z-5 or Z-7 hubs, in PAG, conductive PAGAS or die-cast aluminium.
The 7XL is an adjustable-pitch axial fan blade for a wide 250-1040 mm range with 3 to 16 blades on the Z-3 hub, in PAG or die-cast aluminium ADC12.
The 7XL is an adjustable-pitch axial fan blade for a wide 250-1040 mm range with 3 to 16 blades on the Z-3 hub, in PAG or die-cast aluminium ADC12.
The 7Z is an adjustable-pitch axial fan blade covering 560-922 mm with 5 to 16 blades on Z-3, Z-5 or Z-7 hubs, in PAG, conductive PAGAS or die-cast aluminium.
Inquire NowThe 7Z is an adjustable-pitch axial fan blade covering 560-922 mm with 5 to 16 blades on Z-3, Z-5 or Z-7 hubs, in PAG, conductive PAGAS or die-cast aluminium.
The 7XL is an adjustable-pitch axial fan blade for a wide 250-1040 mm range with 3 to 16 blades on the Z-3 hub, in PAG or die-cast aluminium ADC12.
Inquire NowThe 7XL is an adjustable-pitch axial fan blade for a wide 250-1040 mm range with 3 to 16 blades on the Z-3 hub, in PAG or die-cast aluminium ADC12.
The 7Z is an adjustable-pitch axial fan blade covering 560-922 mm with 5 to 16 blades on Z-3, Z-5 or Z-7 hubs, in PAG, conductive PAGAS or die-cast aluminium.
Inquire NowThe 7Z is an adjustable-pitch axial fan blade covering 560-922 mm with 5 to 16 blades on Z-3, Z-5 or Z-7 hubs, in PAG, conductive PAGAS or die-cast aluminium.
The 7XL is an adjustable-pitch axial fan blade for a wide 250-1040 mm range with 3 to 16 blades on the Z-3 hub, in PAG or die-cast aluminium ADC12.
Inquire NowThe 7XL is an adjustable-pitch axial fan blade for a wide 250-1040 mm range with 3 to 16 blades on the Z-3 hub, in PAG or die-cast aluminium ADC12.