| Quantity: | |
|---|---|
The low-pressure two-stage permanent magnet variable frequency screw air compressor is an energy-saving air compressor that uses two-stage compression technology, a permanent magnet synchronous motor (PM motor) and a variable frequency drive (VFD). It is designed for low-pressure working conditions (usually ≤8 bar) and is suitable for industrial scenarios that require a stable and efficient air source.
Product Parameters
| 5.5 bar Low-pressure Two-stage PM VSD Screw Air Compressor | ||||||
| Model | Air Delivery (m³/min) | Power (kW/hp) | Noise dB(A) | Outlet diameter | Dimensions(mm) | Weight (kg) |
| 5.5 bar | L*W*H | |||||
| RL60APMII | 12.0 | 45/60 | 68 | DN65 | 2450*1700*1760 | 1450 |
| RL75APMII | 15.0 | 55175 | 70 | DN65 | 2450*1700*1760 | 1800 |
| RL100APMII | 19.2 | 75/100 | 70 | DN65 | 2450*1700*1760 | 2000 |
| RL125APMII | 23.0 | 90/125 | 72 | DN80 | 2604*1904*1892 | 2700 |
| RL150APMII | 27.90 | 110/150 | 72 | DN80 | 2604*1904*1892 | 3200 |
| RL175APMII | 33.30 | 132/175 | 72 | DN100 | 3000*1900*1950 | 3100 |
| RL220APMII | 41.50 | 160/220 | 78 | DN100 | 3000*1900*1950 | 4400 |
| RL250APMII | 43.50 | 185/250 | 78 | DN125 | 3600*2200*2200 | 5500 |
| RL270APMII | 50.50 | 200/270 | 78 | DN125 | 3600*2200*2200 | 6000 |
| RL300APMII | 55.06 | 220/300 | 80 | DN150 | 4000*2300*2300 | 6800 |
| RL350APMII | 60.45 | 250/350 | 80 | DN150 | 4000*2300*2300 | 7500 |
Core Advantages
1. High Efficiency and Energy Saving
Two-stage Compression: Two-stage compression reduces the load on each stage and reduces energy consumption, resulting in 10%-15% energy savings compared to single-stage compressors.
Permanent Magnet Inverter: The PM motor achieves IE4/IE5 efficiency standards, and variable frequency control minimizes no-load losses, resulting in 30%-40% overall energy savings.
2. Stability and Reliability
The two-stage structure reduces bearing and rotor loads, extending lifespan; variable frequency technology reduces start-stop shock.
3. Low Noise and Environmental Protection
The permanent magnet motor eliminates excitation losses and offers lower noise levels (typically <65dB), meeting green factory requirements.
4. Precise Air Supply
Variable frequency control enables stepless adjustment from 0 to 100%, with air pressure fluctuations of ±0.1 bar, eliminating energy waste.
Key Application Industries
Textiles/Glass/Food: Low pressure, high flow requirements (such as air-jet looms and bottle blowing).
Electronics/Pharmaceuticals: Clean, stable air sources (PCB manufacturing, aseptic packaging).
Chemicals/Energy: Continuous air supply applications such as reactor stirring and instrument air.
Automotive/Machinery: Intermittent loads such as spray painting and pneumatic tools.
Frequently Asked Questions
1. How much power does a conventional AC motor save compared to a conventional AC motor?
The actual power savings are 30%-50%, depending on the load factor (the advantage of AC motors is most pronounced at partial loads).
2. Why is two-stage compression more efficient?
Air is compressed in two stages, with intercooling lowering the temperature and reducing power consumption (approximately isothermal compression).
3. Will permanent magnet motors demagnetize?
Demagnetization is possible at high temperatures (>150°C), but high-quality models use high-temperature-resistant NdFeB magnets and have temperature protection.
4. Is maintenance cost high?
Permanent magnet motors are maintenance-free, but AC motors require regular dust removal, so overall maintenance is lower than that of AC motors.
5. What is the adjustable minimum pressure?
Usually, the minimum pressure is 50% of the rated pressure (e.g., a 4-bar model can be adjusted to 2 bar). Please confirm the specific model.
The low-pressure two-stage permanent magnet variable frequency screw air compressor is an energy-saving air compressor that uses two-stage compression technology, a permanent magnet synchronous motor (PM motor) and a variable frequency drive (VFD). It is designed for low-pressure working conditions (usually ≤8 bar) and is suitable for industrial scenarios that require a stable and efficient air source.
Product Parameters
| 5.5 bar Low-pressure Two-stage PM VSD Screw Air Compressor | ||||||
| Model | Air Delivery (m³/min) | Power (kW/hp) | Noise dB(A) | Outlet diameter | Dimensions(mm) | Weight (kg) |
| 5.5 bar | L*W*H | |||||
| RL60APMII | 12.0 | 45/60 | 68 | DN65 | 2450*1700*1760 | 1450 |
| RL75APMII | 15.0 | 55175 | 70 | DN65 | 2450*1700*1760 | 1800 |
| RL100APMII | 19.2 | 75/100 | 70 | DN65 | 2450*1700*1760 | 2000 |
| RL125APMII | 23.0 | 90/125 | 72 | DN80 | 2604*1904*1892 | 2700 |
| RL150APMII | 27.90 | 110/150 | 72 | DN80 | 2604*1904*1892 | 3200 |
| RL175APMII | 33.30 | 132/175 | 72 | DN100 | 3000*1900*1950 | 3100 |
| RL220APMII | 41.50 | 160/220 | 78 | DN100 | 3000*1900*1950 | 4400 |
| RL250APMII | 43.50 | 185/250 | 78 | DN125 | 3600*2200*2200 | 5500 |
| RL270APMII | 50.50 | 200/270 | 78 | DN125 | 3600*2200*2200 | 6000 |
| RL300APMII | 55.06 | 220/300 | 80 | DN150 | 4000*2300*2300 | 6800 |
| RL350APMII | 60.45 | 250/350 | 80 | DN150 | 4000*2300*2300 | 7500 |
Core Advantages
1. High Efficiency and Energy Saving
Two-stage Compression: Two-stage compression reduces the load on each stage and reduces energy consumption, resulting in 10%-15% energy savings compared to single-stage compressors.
Permanent Magnet Inverter: The PM motor achieves IE4/IE5 efficiency standards, and variable frequency control minimizes no-load losses, resulting in 30%-40% overall energy savings.
2. Stability and Reliability
The two-stage structure reduces bearing and rotor loads, extending lifespan; variable frequency technology reduces start-stop shock.
3. Low Noise and Environmental Protection
The permanent magnet motor eliminates excitation losses and offers lower noise levels (typically <65dB), meeting green factory requirements.
4. Precise Air Supply
Variable frequency control enables stepless adjustment from 0 to 100%, with air pressure fluctuations of ±0.1 bar, eliminating energy waste.
Key Application Industries
Textiles/Glass/Food: Low pressure, high flow requirements (such as air-jet looms and bottle blowing).
Electronics/Pharmaceuticals: Clean, stable air sources (PCB manufacturing, aseptic packaging).
Chemicals/Energy: Continuous air supply applications such as reactor stirring and instrument air.
Automotive/Machinery: Intermittent loads such as spray painting and pneumatic tools.
Frequently Asked Questions
1. How much power does a conventional AC motor save compared to a conventional AC motor?
The actual power savings are 30%-50%, depending on the load factor (the advantage of AC motors is most pronounced at partial loads).
2. Why is two-stage compression more efficient?
Air is compressed in two stages, with intercooling lowering the temperature and reducing power consumption (approximately isothermal compression).
3. Will permanent magnet motors demagnetize?
Demagnetization is possible at high temperatures (>150°C), but high-quality models use high-temperature-resistant NdFeB magnets and have temperature protection.
4. Is maintenance cost high?
Permanent magnet motors are maintenance-free, but AC motors require regular dust removal, so overall maintenance is lower than that of AC motors.
5. What is the adjustable minimum pressure?
Usually, the minimum pressure is 50% of the rated pressure (e.g., a 4-bar model can be adjusted to 2 bar). Please confirm the specific model.
