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China Two-stage Screw Air Compressor: Energy-efficient Factory Solutions from Reliable Suppliers
Air-end
🏆 Level 1 Energy Efficiency Grade Certified
Two-stage compression compared to single-stage compression — two-stage compression tends toward the most energy-efficient isothermal compression. From the principle, two-stage compression saves 5~8% energy over single-stage compression.
Won the award of Level 1 Energy Efficiency Grade Certification. Compared with Level 2 Energy Efficiency Grade — Save 10%–15% energy. Compared with Level 3 Energy Efficiency Grade — Save 20%–30% energy.
- Adopt two-stage independent compression
- The pressure ratio is equal over both stages as well as having a lower compression speed, which helps improve volumetric efficiency
- Oil mist spray cooling is used between the stages to make the entire compression process close to isothermal compression and improve the compression insulation efficiency
- The two-stage rotors are directly driven by the bevel gear respectively, and the compression transmission efficiency is high
- The large diameter and low speed of the rotors reduce stress on the bearings, thus lengthening their life span as well as any other components
Controller
- LCD HD touch monitor with PLC control and human-friendly menu interface design
- Displays multi-line operation parameters and historical records
- Simple operation, easy inquiry, and convenient maintenance
Inverter
The inverter is the brain of the air compressor — all operations are processed and regulated through the inverter, ensuring safe and reliable system operation in all aspects.
We typically use inverters from Megmeet, Inovance, and Zoncn — internationally renowned brands with stable and reliable quality and guaranteed after-sales service, providing customers with the best possible air compressor user experience.
Motor
The main motor is an IP55 high-efficiency energy-saving permanent magnet motor carefully selected according to the application of the air compressor. (Other IP levels available)
- All meet national energy efficiency standards
- F-class insulation with B-class temperature rise, effectively preventing dust ingress
- SKF heavy-duty bearings ensure continuous trouble-free operation over a long period
Frequently Asked Questions
Q What is the main advantage of two-stage compression over single-stage compression?
Two-stage compression approaches isothermal compression more closely, resulting in 5–8% energy savings compared to single-stage compression. It also achieves Level 1 Energy Efficiency Grade Certification, saving 20–30% energy compared to Level 3 efficiency products.
Q How does the oil mist spray cooling between stages benefit performance?
Oil mist spray cooling between the two compression stages keeps the process close to isothermal compression, which significantly improves compression insulation efficiency and reduces heat buildup, contributing to more stable and energy-efficient operation.
Q What type of controller does the air compressor use?
The air compressor features an LCD HD touch monitor with PLC control and a human-friendly menu interface. It can display multiple lines of operation parameters and historical records, making operation, inquiry, and maintenance straightforward and efficient.
Q Which inverter brands are used and why?
The compressor uses inverters from Megmeet, Inovance, and Zoncn — all internationally recognized brands known for stable performance, reliable quality, and strong after-sales support. These inverters act as the control brain, managing all compressor operations safely and efficiently.
Q What are the key specifications of the main motor?
The main motor is an IP55-rated high-efficiency permanent magnet motor with F-class insulation and B-class temperature rise. It meets national energy efficiency standards and uses SKF heavy-duty bearings to ensure long-term, trouble-free continuous operation. Other IP protection levels are also available upon request.
Q How do the large-diameter, low-speed rotors extend the compressor's service life?
The large-diameter, low-speed rotor design significantly reduces mechanical stress on the bearings and internal components. This lower stress results in less wear over time, extending the lifespan of the bearings and other critical parts, ultimately lowering maintenance costs and improving overall reliability.
