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China Two-Stage Screw Air Compressor - Energy-Efficient Solutions from Leading Suppliers and Factory
Air-end
🏆 Level 1 Energy Efficiency Grade Certified
Two-stage compression compared to single-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.
- Can display multi-line operation parameters and historical records.
- Simple operation and inquiry for convenient maintenance.
Inverter
The inverter is the brain of the air compressor — all operations are processed and regulated through it, ensuring safe and reliable system operation across 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 the national energy efficiency standards with F-class insulation and B-class temperature rise, effectively preventing the entry of dust.
- SKF heavy-duty bearings ensure continuous trouble-free operation over a long period of time.
Frequently Asked Questions
Q What is the advantage of two-stage compression over single-stage compression?
Two-stage compression approaches isothermal compression more closely, which is theoretically the most energy-efficient form of compression. In practice, this results in energy savings of 5–8% compared to single-stage compression, reducing operating costs significantly over the long term.
Q What energy efficiency certification does the air-end hold?
The air-end has won the Level 1 Energy Efficiency Grade Certification — the highest level. It saves 10%–15% energy compared to Level 2 certified units and 20%–30% energy compared to Level 3 certified units.
Q What type of controller interface 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 daily operation, inquiry, and maintenance straightforward and convenient.
Q Which inverter brands are used and why?
We use inverters from Megmeet, Inovance, and Zoncn — all internationally recognized brands known for stable performance, reliable quality, and strong after-sales support. These brands ensure the air compressor system operates safely and efficiently under all conditions.
Q What are the key features of the motor used in the air compressor?
The motor is an IP55-rated high-efficiency permanent magnet motor with F-class insulation and B-class temperature rise, meeting national energy efficiency standards. It is equipped with SKF heavy-duty bearings that ensure long-term, trouble-free continuous operation while effectively preventing dust ingress.
Q How does oil mist spray cooling improve compression efficiency?
Oil mist spray cooling is applied between the two compression stages to absorb heat generated during compression. This keeps the process close to isothermal compression — where temperature remains constant — which maximizes thermodynamic efficiency and reduces energy consumption compared to adiabatic compression.
