P Series

P Series — UTEK-DELE Axial Fan Range

The P Series is the widest medium-diameter family in the range. Two models cover the class: the P3Z from 250 to 1300 mm with 3 to 16 blades, and the P4Z-P5Z-P6Z family from 250 to 1343 mm with blade counts from 1 to 16. Both use adjustable blade pitch and Z family hubs up to Z-18.

That spread is what makes the P Series useful for mixed plants: one blade family can be tuned across engine radiator cooling, HVAC, compressors, engine-driven equipment, fireproof ventilation and oil, gas or coal equipment without changing the hub interface or the service procedure.

Model Range and Specifications

Blade count is set by the duty point: high blade counts are used where static pressure is the limiting factor, lower counts where airflow and low blade-passing noise dominate.

Blade Materials and Temperature Range

Blade material is selected from the working temperature and from the atmosphere around the impeller:

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.

Hub Options

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:

Typical Applications

This series is normally specified for the following duties:

• Engine radiator cooling on industrial and mobile equipment

• HVAC and air handling installations

• Compressors and engine-driven equipment

• Fireproof ventilation and oil, gas or coal equipment

Specification Support

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.

Quality Assurance and Dynamic Balancing

Each impeller is balanced on a hand laser balancing machine before shipment. Blade pitch is set and recorded at assembly so a replacement blade set can be matched to the original duty point. The adjustable-angle concept behind these blades is covered by a granted Chinese utility model patent (CN 212250568 U).

Customization and Series Overview

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. Where low noise rather than pressure is the priority, the sickle-blade S Series is normally specified from the same Z hub family.

Related ranges: S Series blades | 7Z Series fan | K Series big airflow fan | H Series small impellers.