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0102030405
China Suppliers Factory Two-Stage Oil-Lubricated Screw Air Compressor for Enhanced Efficiency and Energy Savings
Air-end
✓ Level 1 Energy Efficiency Certified
Two-stage compression compared to single-stage compression, the two compression tends to the most provincial power of the isothermal compression. From the principle, the single-stage compression of the two compression energy saving 5~8%.
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, PLC control, human menu interface design.
- Can display multi-line operation parameters and historical records.
- Simple operation, easy inquiry, and convenient maintenance.
Inverter
The inverter is the brain of the air compressor, and all operations of the air compressor are processed and regulated through the inverter, ensuring the safe and reliable operation of the air compressor system in all aspects.
We typically use inverters from internationally renowned brands with stable and reliable quality and guaranteed after-sales service, providing customers with the best possible air compressor user experience.
★ Megmeet
★ Inovance
★ Zoncn
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. Effectively prevents the entry of dust, with SKF heavy-duty bearings ensuring continuous trouble-free operation for a long time.
Frequently Asked Questions
Q
What is the main advantage of two-stage compression over single-stage compression?
Two-stage compression is closer to isothermal compression, which is the most energy-efficient compression method. Compared to single-stage compression, two-stage compression saves approximately 5–8% more energy. Additionally, it has achieved Level 1 Energy Efficiency Grade Certification, saving 20–30% energy over Level 3 grade units.
Q
How does the oil mist spray cooling between stages work and why is it important?
Oil mist spray cooling is applied between the two compression stages to reduce the temperature of the compressed air. This makes the entire compression process approach isothermal compression, which significantly improves compression efficiency and reduces energy consumption.
Q
What brands of inverters are used and why are they chosen?
We use inverters from Megmeet, Inovance, and Zoncn — all internationally recognized brands known for their stable performance, reliable quality, and strong after-sales service networks. These brands ensure the safe and consistent operation of the air compressor system.
Q
What IP protection rating does the motor have, and are other ratings available?
The standard motor is rated at IP55, which provides protection against dust ingress and low-pressure water jets. Other IP protection levels are also available upon request to suit different operating environments and application requirements.
Q
What type of bearings does the motor use and how does this affect reliability?
The motor uses SKF heavy-duty bearings, which are globally recognized for their durability and precision. Combined with F-class insulation and B-class temperature rise design, these bearings ensure long-term, continuous, and trouble-free operation under demanding industrial conditions.
Q
What are the key features of the controller interface?
The controller features an LCD HD touch monitor with PLC control and a human-friendly menu interface. It can display multiple lines of real-time operation parameters and historical records, making daily operation, system inquiry, and maintenance simple and convenient for operators.




