PM variable frequency two stage screw air compressor

By optimizing the compression process, the PM variable frequency two-stage screw air compressor increases gas production by 15% under the same power, achieving significant energy savings. Its efficient and stable air supply performance is ideal for diverse industrial scenarios, reducing energy consumption while boosting productivity.

Features of PM Variable Frequency Two-Stage Screw Air Compressor

1. Powerful air output: Delivers 4.1 m³/min airflow to meet the pneumatic demands of a wide range of industrial equipment.
2. Stable working pressure: Rated at 0.8 MPa, ideal for applications requiring constant pressure to ensure production continuity.
3. High-efficiency two-stage compression mainframe: Customized for optimal performance, this design increases energy efficiency by 15% compared to single-stage compressors, minimizing power consumption and energy loss.
4. Totally enclosed oil-cooled permanent magnet synchronous motor: IP65-rated for superior dust and water resistance, enhancing reliability and motor life even in harsh environments.
5. Coaxial integrated transmission: Direct connection between motor and mainframe eliminates gears and belts, achieving 100% transmission efficiency, reducing mechanical losses, maintenance costs, and noise.
6. Intelligent pressure control: Dual flow and pressure intelligent adjustment keeps pressure fluctuation within ±0.01 MPa for a stable air supply.
7. Unattended intelligent operation: Advanced energy-saving control system enables real-time monitoring, dynamic parameter adjustment, remote monitoring, and automated energy management—reducing manual intervention and maximizing operational efficiency.

Working Principle

1. One-stage compression: Air enters the first-stage screw unit and is compressed, with lubricant injection cooling the process to minimize heat loss.
2. Intermediate cooling: Enhanced oil injection cooling significantly lowers air temperature before entering the secondary compression unit, reducing energy required for further compression.
3. Secondary compression: Cooled air is further compressed in the secondary screw rotor to the rated pressure (0.8 MPa), with improved efficiency and reduced power usage.
4. Final exhaust: High-pressure air passes through oil/gas separation and post-treatment, ensuring clean, stable output for end-use equipment.
5. Two-stage compression advantages: Increases air production by 15% under the same motor power, uses isobaric ratio for optimal stage pressure, reduces internal leakage, and improves overall efficiency with precise pressure control and frequency conversion.

Application Fields

• Automobile manufacturing: Supplies high-quality compressed air for spraying, welding, and assembly line pneumatic tools.
• Machining: Essential for CNC machining, metal cutting, casting, and mold making to ensure equipment reliability.
• Food and Medicine: Provides clean, stable compressed air for food packaging, pharmaceutical production, and pneumatic conveying.
• Electronic Manufacturing: Supports dust-free workshops and precision component processing for high-accuracy environments.
• Textile industry: Powers air jet looms and pneumatic controls, enhancing productivity.
• Chemical and metallurgical industry: Meets demanding needs for gas transport and pneumatic control in chemical and metallurgical processes.