RAFAVENT PROCESS VENTILATION
High-Temperature & Oven Fans
Project-engineered centrifugal fan configurations for ovens, dryers and elevated-temperature process air. Temperature capability is released only for the documented construction.
Technical boundary: published airflow and pressure are preliminary calculations at ambient-density basis. No continuous or peak temperature rating is claimed until the selected drive, bearings, materials, cooling arrangement and exposure time are reviewed and documented.
Engineering arrangements
Direct drive with thermal separation
Compact arrangement; motor exposure, cooling disc and shaft heat transfer must be verified.
Belt drive with outboard bearings
Motor positioned outside the hot airstream; belts, bearings, guards and cooling are selected for the project.
Oven recirculation configuration
Backward-curved wheel with project-specific casing, insulation, shaft sealing and mounting orientation.
Required thermal and process data
| Required field | Project definition |
|---|---|
| Normal / maximum temperature | Continuous value, peak value and exposure duration |
| Process medium | Clean air, vapour, fumes, dust loading and corrosive constituents |
| Duty point | Airflow, static pressure, altitude and actual inlet density |
| Drive arrangement | Direct, belt or coupling; motor location and VFD requirement |
| Materials and protection | Wheel, casing, shaft, fasteners, coating and insulation |
| Bearing and cooling system | Bearing location, lubricant, cooling disc and purge/cooling air |
| Installation | Horizontal/vertical orientation, connections, expansion and access |
| Evidence status | Temperature rating released only with approved construction record |
Preliminary model performance
Calculated selection data — non-certified — ambient-density basis. Final hot-air performance is corrected for actual density and system conditions.
| Model | Connection | Airflow m³/h | Static pressure Pa | Speed rpm | Motor kW | Supply | Est. dB(A) @ 3 m |
|---|---|---|---|---|---|---|---|
| RF-HT-315 | 315 mm | 700–1,500 | 120–310 | 1,450 | 0.37 | 3Ph | 53 |
| RF-HT-500 | 500 mm | 2,700–5,900 | 300–780 | 1,450 | 3 | 3Ph | 68 |
| RF-HT-800 | 800 mm | 11,000–24,000 | 780–1,990 | 1,450 | 30 | 3Ph | 81 |
Calculated performance curves
RF-HT-315
| # | Airflow m³/h | Static pressure Pa |
|---|---|---|
| 1 | 0 | 310 |
| 2 | 300 | 307 |
| 3 | 600 | 291 |
| 4 | 900 | 254 |
| 5 | 1,200 | 180 |
| 6 | 1,500 | 0 |
RF-HT-500
| # | Airflow m³/h | Static pressure Pa |
|---|---|---|
| 1 | 0 | 780 |
| 2 | 1,180 | 772 |
| 3 | 2,360 | 733 |
| 4 | 3,540 | 640 |
| 5 | 4,720 | 452 |
| 6 | 5,900 | 0 |
RF-HT-800
| # | Airflow m³/h | Static pressure Pa |
|---|---|---|
| 1 | 0 | 1,990 |
| 2 | 4,800 | 1,970 |
| 3 | 9,600 | 1,871 |
| 4 | 14,400 | 1,632 |
| 5 | 19,200 | 1,154 |
| 6 | 24,000 | 0 |
Selection and release process
- Submit normal and maximum temperature, exposure time and medium composition.
- Confirm airflow, pressure, density, altitude and installation orientation.
- Select the drive, materials, bearings, cooling, sealing and insulation arrangement.
- Correct performance for actual hot-air density and verify motor/VFD duty.
- Release the technical submittal with explicit temperature and evidence limits.
Request an engineering selection
Send the duty point, installation arrangement, operating conditions and available drawings for a project-specific selection.
Send project requirements