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The 350~475HP single-stage permanent magnet variable frequency air compressor is an advanced compressed air equipment with a single-cylinder structure that adopts a high-efficiency permanent magnet synchronous motor and variable frequency drive technology and has a power range of 250 to 350 kilowatts.
The advantages of permanent magnet variable speed screw air compressor
1. High Efficiency and Energy Savings: Significant Power Savings
◦ Utilizes a permanent magnet synchronous motor, offering exceptionally high inherent efficiency. Its variable frequency drive precisely matches air demand, avoiding wasted idle time. Compared to conventional mains frequency air compressors, it typically achieves energy savings of 20%-35%.
2. Stable Air Pressure, Improved Quality
◦ Variable frequency control ensures constant air pressure with minimal pressure fluctuations. This is crucial for processes such as precision manufacturing, spray coating, and textile production, which require high air pressure stability and effectively improve product quality.
3. Smooth Startup, Reduced Impact
◦ Utilizes a soft start method, significantly reducing the impact on the power grid and mechanical components compared to the star-delta starting method of mains frequency compressors, protecting the electrical system and extending equipment life.
4. Lower Noise, Improving the Environment
◦ Variable frequency operation typically results in lower main engine speeds, reducing the noise associated with frequent loading and unloading, resulting in quieter operation and a better working environment.
5. Intelligent Control, Easier Maintenance
◦ The integrated intelligent control system monitors operating status and energy consumption data in real time, providing fault warnings and facilitating maintenance management and predictive maintenance.
Technical Parameters
| Model | Air Delivery (m3/min) | Power (kW/hp) | Noise dB(A) | Outlet diameter | Dimensions (mm) | Weight (kg) | ||
| 8 bar | 10 bar | 13 bar | L * W * H | |||||
| RK350APM | 16.6-41.5 | 15.2-38.0 | 14.0-34.9 | 250/350 | 76 | DN100 | 3600*2200*2200 | 5900 |
| RK375APM | 20.2-50.6 | 18.4-46.0 | 16.6-41.5 | 280/375 | 82 | DN100 | 3600*2200*2200 | 6000 |
| RK420APM | 22.2-55.9 | 20.0-50.1 | 16.8-42.0 | 315/420 | 82 | DN125 | 4600*2300*2430 | 7800 |
| RK420WPM | 22.2-55.9 | 20.0-50.1 | 16.8-42.0 | 315/420 | 82 | DN125 | 4200*2300*2430 | 7500 |
| RK475APM | 26.0-65.4 | 22.0-55.1 | 18.4-46.0 | 355/475 | 85 | DN125 | 4600*2300*2430 | 8200 |
| RK475WPM | 26.0-65.4 | 22.0-55.1 | 18.4-46.0 | 355/475 | 82 | DN125 | 4200*2300*2430 | 7900 |
Application Industry
High-end manufacturing
such as automotive, electronics, semiconductor, and medical device manufacturing. These industries require extremely high compressed air purity (often oil-free) and pressure stability, and are used in processes such as spraying, assembly, testing, and cleaning.
Heavy industry and basic materials
such as metallurgy, chemicals, mining, and power generation. As the power and control air source for large equipment, driving heavy tools, controlling processes, and transporting materials, these devices require durability and high energy efficiency.
Textile and chemical fiber industries
This is its most representative application area. Powering hundreds of air-jet looms, the variable frequency function can cope with the huge fluctuations in their instantaneous air consumption, resulting in significant energy savings.
Food and pharmaceutical industries
Used in processes such as filling, packaging, mixing, and fermentation, oil-free compressors are essential to ensure product safety, and strict requirements are placed on the reliability and stability of the air supply.
