HAF Fan
This robust, highly efficient radial fan is designed to operate in demanding environments with efficiency above 80%
- The basics
- Design
- Maintenance
Key benefits
- Fan efficiency up to 84%
- Designed for the harsh conditions of the cement industry
- Simple installation – single suction type requires only one suction pipe connection
- Rigid support in elevated concrete foundation
- Optimal rotor stability and thermal endurance
- Minimal maintenance
How they work
These high-pressure fans are suitable to generate a flow of clean or dust-laden gas or air. Flow rate: up to 160 m3/s; pressure: up to 20,000 Pascal.
Available in several sizes, the HAF fan can withstand continuous operation at flow temperatures up to 400°C and 450°C for short periods.
Typical applications
- Kiln ID fan (for clinker production – ILC, SLC-D, SP, ILC-E and other kiln systems)
- Raw mill fan (for raw meal production and grinding – ATOX, FRM, TM, TUM and other raw meal grinding systems)
- Cement and slag mill fan (for cement grinding – OK mill systems)
- Coal mill fan (for coal grinding – ATOX, TM and other coal grinding systems)
- Dryer crusher fan (for clinker production – EV dryer crusher systems)
- Flash dryer fan (for raw meal production)
Design highlights
- Single suction type fan
- Suction box forms an integral part of the spiral-shaped casing
- Shrouded impeller with backward curved blades
- Impeller positioned between the bearings
- Wear protection on impeller and in casing if needed
- Several access doors enable inspection of the impeller
- Dynamically balanced impeller ensures vibration-free operation
- Shaft is fitted with cooling discs to prevent overheating of bearings
- Self-aligning, spherical roller bearings mounted in oil lubricated bearing housings. Bearing housings located on heavy bearing brackets
- Motor power is transmitted via a flexible coupling
Accessories
- Thermal sensors and vibration monitoring
- Inlet louvre damper and actuator for regulation
- Emergency (barring) system for rotation of shaft in the event of power cut
- Jet pulse system for on-line cleaning of impeller
Moderate maintenance requirements
Maintenance requirements for the fan type HAF are very moderate, and lubrication frequency depends on operating conditions. Bearing temperatures up to 100°C are acceptable.