Advanced Pneumatic Reversible Variable fan for Agriculture Machinery
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.
Reversible axial fans reverse the airflow on demand so debris is pushed back out of the radiator core instead of being cleaned by hand. UTEK-DELE builds both the pneumatic and the hydraulic reversing routes.
A reversible axial fan solves a maintenance problem rather than an airflow problem. On machines working in dust, chaff or field debris, the radiator core blocks from the outside, and the usual answer is compressed air, water or a shutdown. A reversible fan turns the airflow around instead, pushing the debris back out while the machine keeps working.
UTEK-DELE manufactures both reversing routes used on industrial and mobile equipment: pneumatic reversal with a one-touch actuator, and hydraulic reversal that shares the machine hydraulic circuit and allows continuous pitch trimming. Both use blades from the medium and large adjustable range, so an existing fan installation can usually be re-bladed rather than replaced.
| Route | Pitch travel | Actuation | Typical use |
|---|---|---|---|
| Pneumatic reversal | +35° to +90° and -90° to -35° | Pneumatic actuator, one-touch control | Light blade sets, narrow engine bays |
| Hydraulic reversal | +35° to -35° (continuous trimming) | Hydraulic circuit, shared with machine hydraulics | Heavy mobile machinery with stacked cooling packs |
The reversing mechanism is covered by a granted Chinese invention patent (CN 118309603 B, variable-pitch reversible fan) held by the company manufacturing entity.
Blade material is selected from the working temperature and from the atmosphere around the impeller:
| Material | Composition | Temperature range | Typical duty |
|---|
This series is normally specified for the following duties:
Radiator cleaning on tractors, harvesters and sprayers
Non-stop dust removal on machines working in high-debris environments
Generator sets and compressors with blocked cooling packs
Any cooling pack where access for manual cleaning is difficult
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.
Reversible impellers are assembled as a matched blade and hub set and balanced on a hand laser balancing machine before shipment, so the reversing assembly runs smoothly through repeated pitch changes.
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 where installation space is tight, and the hydraulic route where the machine already has a hydraulic supply and heavier blade sets are used.
Related ranges: Pneumatic Reversible Fan | Hydraulic Reversible Fan | Pneumatic Reversible Fan product page | Hydraulic Reversible Fan product page.
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.
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.
The hydraulic reversible fan turns its blades hydraulically so the airflow can be reversed on demand, clearing dust and chaff from a radiator or cooler core while the machine keeps working.
The hydraulic reversible fan turns its blades hydraulically so the airflow can be reversed on demand, clearing dust and chaff from a radiator or cooler core while the machine keeps working.
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.
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.
The hydraulic reversible fan turns its blades hydraulically so the airflow can be reversed on demand, clearing dust and chaff from a radiator or cooler core while the machine keeps working.
Inquire NowThe hydraulic reversible fan turns its blades hydraulically so the airflow can be reversed on demand, clearing dust and chaff from a radiator or cooler core while the machine keeps working.