dual stage variable frequency screw air compressor

This two-stage frequency conversion screw air compressor is designed for a wide range of industrial production scenarios, providing a stable and efficient air source to guarantee the continuity and reliability of your production process. With an exhaust capacity of 17.7 m³/min and a working pressure of 0.8 MPa, it is widely used in precision manufacturing, automotive, food processing, textile, electronics, chemical, and other industries—delivering reduced energy consumption and improved compressed air supply stability.

Features of Two-Stage Frequency Conversion Screw Air Compressor

1. High-efficiency two-stage compression structure:
   • Customized high-efficiency screw mainframe offers greater energy efficiency than single-stage compression, reducing energy loss.
   • Intermediate cooling technology reduces temperature and second stage power consumption, improving overall operating efficiency.
   • Produces about 15% more gas under the same power input compared to traditional single-stage compressors.
2. Permanet magnet synchronous motor drive (IP65):
   • Fully enclosed oil-cooled motor ensures superior heat dissipation and stable long-term operation.
   • Coaxial integration of motor and host for 100% transmission efficiency, eliminating belts/gears and reducing maintenance costs.
   • IP65 protection—dustproof, waterproof, and suitable for harsh environments.
3. Intelligent control system:
   • Intelligent frequency conversion adjusts speed based on actual demand, ensuring stable supply and reducing energy usage.
   • Constant pressure control keeps pressure fluctuation within ±0.01 MPa, maintaining consistent production efficiency.
   • Remote monitoring and data analysis enable unattended, real-time management and improved operational efficiency.
4. Low noise, environmental protection, and energy saving:
   • Direct-drive structure removes belt/gear noise for quieter operation.
   • High-efficiency oil-injection cooling reduces compression heat, boosts efficiency, and extends equipment life.
   • Saves over 15% energy compared to traditional single-stage compressors, lowering operating costs.

Working Principle

1. Air inhalation and first-stage compression:
   • Ambient air is filtered and enters the first-stage screw rotor chamber, where it is compressed to intermediate pressure.
   • Cooling lubricant is sprayed to lower temperature and improve compression efficiency.
2. Intermediate cooling:
   • Compressed air passes through an intermediate cooling device with spray oil cooling to reduce air temperature and second-stage energy use.
3. Second stage compression:
   • Cooled air enters the second-stage screw rotor and is compressed to the set working pressure (0.8 MPa) for stable supply.
4. Frequency conversion and intelligent control:
   • Frequency conversion system adjusts motor speed to match demand, minimizing energy consumption.
   • Intelligent sensors monitor pressure, temperature, and air volume in real time for efficient system operation.

Application Areas

• Automobile manufacturing: Welding, spraying, and assembly lines requiring stable compressed air.
• Food processing: Clean air for safe food production.
• Electronics manufacturing: Stable air for semiconductor and precision equipment production.
• Chemical & pharmaceutical: Pollution-free air for high-standard production processes.
• Textile printing: For textile and printing pneumatic systems, boosting production efficiency.
• Metallurgy & machinery manufacturing: Pneumatic drive for metal processing and CNC equipment, improving reliability.