German Elektror RD Medium Pressure Centrifugal Fans: Models Overview and Selection Guide
The German Elektror RD series of medium pressure centrifugal fans offers a wide range of models, including RD0, RD2, RD4, RD5, RD6, RD62, RD64, RD65, RD7, RD72, RD74, RD8, RD82, RD84, RD10, RD14, RD16, and others. The series also features corresponding RE series and ATEX explosion-proof models (e.g., RD 2 ATEX), as well as F-type models designed specifically for material conveying (e.g., RD 4 F).
The core of fan selection involves matching air volume and pressure while considering the medium, operating conditions, energy efficiency, and safety. Please follow the standard procedures below.
Main Models & Core Parameters (Reference)
| Model | Air Volume (m³/min) | Total Pressure Diff. (Pa) | Applications |
|---|---|---|---|
| RD2 | Approx. 12 - 16.3 | Approx. 1590 - 2250 | General medium pressure ventilation, cooling |
| RD6 | Approx. 18.3 - 21.5 | Approx. 2360 - 2700 | Drying, pneumatic conveying |
| RD64 | Approx. 27.5 | Approx. 3300 | Medium-high pressure ventilation, material conveying |
| RD74 | Approx. 60.5 - 65 | Approx. 3500 - 3600 | Large-scale industrial dust extraction, forced ventilation |
| RD16 | Low volume, med. pressure | Low pressure diff., med. flow | Small equipment cooling, local ventilation |
Selection Steps (Precise Matching)
Define Core Parameters
Air Volume: Determine the required air volume based on actual demand plus a 5% - 10% leakage coefficient.
Pressure: Calculate the sum of pipeline friction resistance and local resistance, then add a 10% - 15% safety margin to determine the required total pressure.
Medium Characteristics: For dusty, corrosive, or high-temperature media, select appropriate materials (e.g., cast aluminum, stainless steel), protection ratings, and sealing structures.
Match the Model
Compare with the Elektror RD series performance curves to find a model that meets both air volume and pressure requirements while operating in the high-efficiency zone (max efficiency > 90%).
For special scenarios (explosion-proof, material conveying), select ATEX models or F-type conveying fans.
Review Key Factors
Power: Ensure motor power is adequate with sufficient reserve to prevent overload.
Installation & Operation: Choose accessories and drive types based on spatial dimensions, noise requirements, and regulation methods (e.g., VFD).
Efficiency & Cost: Prioritize high-efficiency models to reduce long-term energy consumption.
Final Confirmation
Verify the performance curve to ensure the operating point is to the right of the total pressure peak (high volume side) for stable operation.
For special conditions (e.g., high temperature, explosion-proof), consult the manufacturer for customization and compliance certification.
Common Selection Mistakes & Avoidance
Focusing Only on Volume, Ignoring Pressure: This leads to excessive system resistance, fan overload, or insufficient airflow. Both must be matched simultaneously.
Neglecting Medium & Conditions: Failure to select wear-resistant impellers for dusty gas or corrosion-resistant materials for corrosive media can lead to equipment damage.
Excessive Safety Margins: This causes the fan to operate inefficiently for long periods, increasing energy consumption. Follow standard proportions for margins.