The Pneumatic Reversible Fan is a 600-1176 mm reversible axial fan with nine blades, using pneumatic blade-pitch reversal to blow debris off radiators without stopping the machine.
The Pneumatic Reversible Fan is a reversible axial fan built for machines that work in dust, chaff and field debris. Nine blades cover the 600-1176 mm range, and the blade pitch is reversed by a pneumatic actuator so the airflow is turned around to push debris back out of the radiator core instead of relying on compressed air or water.
Because the airflow is reversed from the driver's seat, radiators stay clear through a full shift. The fan is specified for mobile equipment where stopping to clean the cooler means losing production time, and where the same impeller has to survive continuous vibration and high ambient temperature.
| Model | Blade angle | Blade count | Diameter range | Blade materials | Product page |
|---|---|---|---|---|---|
| Pneumatic Reversible Fan | Reversible (pneumatic) | 9 | 600-1176 mm | PAG / ALU | Pneumatic Reversible Fan |
Reversing is triggered pneumatically with a one-touch control: the blade angle travels from +35° to +90° and from -90° to -35°, so the cleaning cycle is completed without interrupting the engine cooling circuit.
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 |
| ALU | Die-cast aluminium ADC12 | -40 °C to 150 °C, short-term 300 °C for 2 h | High-temperature and fire-resistance zones |
Two reversing routes are available across the reversible fan range. The table below compares them so the right actuation can be selected for a machine platform:
| Route | Pitch travel | Actuation | Typical use |
|---|---|---|---|
| Pneumatic reversal | +35° to +90° and -90° to -35° | Pneumatic actuator, one-touch control | Light blade sets and narrow engine bays |
| Hydraulic reversal | +35° to -35° (continuous trimming) | Hydraulic circuit, shared with machine hydraulics | Heavy mobile machinery with stacked cooling packs |
This series is normally specified for the following duties:
Radiator cleaning on mobile machinery
Non-stop dust removal in high-debris environments
Agricultural and construction equipment cooling packs
Machines with restricted access to the cooler core
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.
Every impeller is balanced on a hand laser balancing machine before shipment, which keeps the reversing assembly running smoothly through repeated pitch changes. The reversing mechanism is covered by a granted Chinese invention patent (CN 118309603 B, variable-pitch reversible fan) held by the company's manufacturing entity.
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. The pneumatic route is normally chosen for narrow engine bays and lighter blade sets, where fast pitch changes and low system weight matter more than torque.
Related ranges: Hydraulic Reversible Fan | H Series small impellers | S Series sickle blades | 7Z Series fan.
The pneumatic reversible fan turns its blades with compressed air, so the airflow can be reversed to clear a radiator or cooler core where no hydraulic circuit is available.
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 pneumatic reversible fan turns its blades with compressed air, so the airflow can be reversed to clear a radiator or cooler core where no hydraulic circuit is available.
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 pneumatic reversible fan turns its blades with compressed air, so the airflow can be reversed to clear a radiator or cooler core where no hydraulic circuit is available.
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 pneumatic reversible fan turns its blades with compressed air, so the airflow can be reversed to clear a radiator or cooler core where no hydraulic circuit is available.
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.
