The two-stage permanent magnet VSD screw air compressor is designed for industrial users who require high efficiency, stable pressure and continuous air supply.

By using two-stage compression, the compressor reduces the compression ratio of each stage, lowers internal leakage and improves volumetric efficiency. According to Ruihong’s product specifications, the two-stage design can increase air delivery by nearly 15% and achieve approximately 15% energy savings.

Main Advantages

• Two-stage compression for higher efficiency
• Permanent magnet VSD technology
• Stable constant-pressure air supply
• Variable-frequency start
• Direct-drive transmission
• Reduced energy consumption
• Suitable for continuous industrial operation

The variable-speed system automatically adjusts motor speed according to actual air demand, helping reduce unnecessary power consumption when air usage changes.

Wide Power Range

The Ruihong two-stage series covers power ratings from 22 kW to 250 kW, with multiple airflow and pressure configurations available.

Standard working pressures include approximately:

0.8 MPa / 1.0 MPa / 1.2 MPa

Standard electrical configuration is 380V / 50Hz / 3 Phase, with customized voltage options available.

Applications

Suitable for:

• Machinery manufacturing
• Metal processing
• Automotive production
• Textile industry
• Packaging
• Chemical industry
• Electronics
• Food and beverage
• Centralized compressed air stations

For factories with large and continuous compressed air demand, the combination of two-stage compression + permanent magnet VSD control provides an efficient and reliable compressed air solution.