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Two-stage Permanent Magnet Variable Frequency Screw Compressor

  • Discharge Pressure:
  • 6~13
  • [bar]
  • 87~189
  • [psig]
  • Free Air Delivery:
  • 2.7~106
  • [m³/min]
  • 76~3743
  • [cfm]
  • Working Power：
  • 15~450
  • [kW]
  • 20~600
  • [hp]
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Description



The two-stage compressed permanent magnet variable frequency screw compressor has its primary and secondary compression rotors integrated within a single housing and each is directly driven by helical gears. The compression process is as follows: Natural air first passes through an air filter and enters the first stage of compression. In the compression chamber, it will be mixed with a small amount of lubricating oil. Meanwhile, the mixed gas is compressed to the interstage pressure. The compressed gas then enters the cooling channel, where it comes into contact with a large amount of oil mist, thus significantly reducing the temperature. The cooled compressed gas enters the second-stage rotor for secondary compression. Finally, the compressor discharges gas through the discharge valve, completing the entire compression process. two-stage compressor

Advantages of two-stage compressed permanent magnet variable frequency screw compressor

  • High Energy Efficiency
    Two-stage independent compression system with equal pressure ratio and low-speed design achieves 30% energy savings.
    Gas discharge power increases by 5%-10% compared to standard models.
  • Outstanding Performance
    Equipped with BSC or Hanbell AB heads for efficient and stable operation.
    High-precision CMM measurement ensures accurate and reliable core components.
  • Optimized Design
    TInnovative 5:6 asymmetric rotor profile improves compression efficiency.
    Low-speed operation reduces wear and noise, extending the machine’s lifespan.
  • Intelligent Control
    Microcomputer control system with bilingual interface for easy operation.
    Supports MODBUS RTU protocol and multiple protection features for safe operation.
  • Premium Components
    High-performance permanent magnet motor with strong demagnetization resistance and constant torque.
    >High-quality bearings ensure durability, wear resistance, and extended reliability.
  • Energy-Saving Intake and Silent Design
    Intake valve made of high-temperature, corrosion-resistant material adjusts air volume precisely to reduce energy consumption.
    Silent centrifugal fan minimizes noise to 65dB(A) while maintaining durability and stability.
Model
Power
(KW)
Pressure
(MPa)
Volume flow
(m³/ min)
Pipe Diameter
Weight
(kg)
Dimension
(mm)
MN-20A-TSPM 15 0.6 3.5 G1 500 1300×900×1220
0.7 2.9
0.8 2.7
1.0 —
1.3 —
MN-25A-TSPM 18.5 0.6 4.2 G1 550 1300×900×1220
0.7 3.8
0.8 3.4
1.0 2.8
1.3 —
MN-30A-TSPM 22 0.6 4.6 G1 500 1300×980×1220
0.7 4.3
0.8 4.1
1.0 3.5
1.3 2.7
MN-40A-TSPM 30 0.6 6.8 G1 1/2 800 1400×1100×1450
0.7 6.4
0.8 5.9
1.0 —
1.3 3.9
MN-50A-TSPM 37 0.6 8.5 G1 1/2 850 1400×1100×1450
0.7 7.5
0.8 7.2
1.0 6.3
1.3 5.4
MN-60A(W)-TSPM 45 0.6 10.7 G2 1/2(A)
DN50(W)		 1500 2100×1440×1650
0.7 10.0
0.8 9.5
1.0 8.0
1.3 6.8
MN-75A(W)-TSPM 55 0.6 14.0 G2 1/2(A)
DN50(W)		 1700 2100×1440×1650
0.7 13.0
0.8 12.5
1.0 9.5
1.3 8.0
MN-100A(W)-TSPM 75 0.6 18.0 G2 1/2(A)
DN50（W)		 1800 2100×1440×1650
0.7 15.5
0.8 15.2
1.0 13.0
1.3 11.5
MN-125A(W)-TSPM 90 0.6 22.0 DN65(A)
DN8O(W)		 2400(A)
2700(W)		 2450×1700×1760(A)
2550×1680×1850(W)
0.7 20.5
0.8 19.5
1.0 16.5
1.3 14.0
MN-150A(W)-TSPM 110 0.6 27.2 DN80 2800 2600×1900×1890(A)
2550×1680×1850(W)
0.7 24.0
0.8 23.0
1.0 20.0
1.3 16.5
MN-180A(W)-TSPM 132 0.6 32.0 DN80 3000(A)
2800(W)		 2600×1900×1890(A)
2550×1680×1850(W)
0.7 29.0
0.8 27.0
1.0 23.7
1.3 19.0
MN-220A(W)-TSPM 160 0.6 38.5 DN100 4300(A)
3450(W)		 3250×2100×2200(A)
3000×2000×2000(W)
0.7 35.3
0.8 33.5
1.0 30.6
1.3 26.0
MN-250A(W)-TSPM 185 0.6 43.8 DN100 4500(A)
4000(W)		 3250×2100×2200(A)
3000×2000×2000(W)
0.7 41.0
0.8 38.0
1.0 34.5
1.3 29.0
MN-270A(W)-TSPM 200 0.6 48.8 DN125(A)
DN100(W)		 6000(A)
5600(W)		 3800×2300×2200(A)
3600×2200×2200(W)
0.7 45.0
0.8 42.0
1.0 38.0
1.3 31.5
MN-300A(W)-TSPM 220 0.6 53.0 DN125(A)
DN100(W)		 6500(A)
6000(W)		 3800×2300×2200(A)
3600×2200×2200(W)
0.7 50.0
0.8 46.0
1.0 41.0
1.3 35.0
MN-350A(W)-TSPM 250 0.6 58.0 DN125(A)
DN100(W)		 7000(A)
6500(W)		 3800×2300×2200(A)
3600×2250×2300(w)
0.7 55.5
0.8 53.0
1.0 45.8
1.3 40.5
MN-380A(W)-TSPM 280 0.6 63.5 DN125 7500(A)
7000(W)		 3800×2300×2200(A)
3600×2250×2300(W)
0.7 62.0
0.8 60.0
1.0 52.0
1.3 43.0
MN-420A(W)-TSPM 315 0.6 81.0 DN125 8500(A)
7500(W)		 4300×2300×2430(A)
4000×2300×2320(W)
0.7 74.0
0.8 67.0
1.0 59.0
1.3 52.0
MN-480A(W)-TSPM 355 0.6 85.0 DN125 9500(A)
8000(W)		 4700×2250×2420(A)
4000×2300×2320(W)
0.7 81.0
0.8 78.0
1.0 64.0
1.2 60.0
1.3 56.0
MN-540A(W)-TSPM 400 0.6 92.5 DN125(A)
DN150(W)		 10000(A)
9000(W)		 4700×2250×2420(A)
4200×2350×2350(W)
0.7 89.0
0.8 84.5
1.0 77.0
1.3 64.0
MN-600W-TSPM 450 0.6 106.0 DN150
 10000(W)
 4200×2350×2350(W)
0.7 101.0
0.8 96.0
1.0 85.0
1.3 79.0

Why Choose Us?

  1. Energy-saving and consumption reduction:Frequency conversion speed regulation, automatic adjustment of operation, saving energy consumption.
  2.  Adaptability to harsh environments: Moisture and dust-proof, suitable for high temperature, high pressure, and other harsh working conditions.
  3. Reduction of wear: Wear-resistant materials, prolonging service life. Extending maintenance intervals and reducing maintenance costs.
  4. Excellent adaptability: High starting torque, quick start. Multiple operating modes to adapt to different working conditions.
  5. Comprehensive service assurance: 24-hour online service, available to answer questions anytime. Quick response, timely recovery of operation.

We focus on saving energy - VSD

For example 37kw screw compressor, the average annual operation is 8,000h, and the cost of electricity is $0.1. We save electricity than ordinary screw compressor per year.

218500-165620=52880KW

52880✖0.1=$5288

each year save $5288

Choosing Minnuo’s portable diesel air compressor means selecting exceptional quality, enhanced productivity, and reliable after-sales support. Let’s work together to take your business to the next level!

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Frequent Asked Question

A two-stage compression permanent magnet variable frequency air compressor uses two independent compression systems with an equal pressure ratio design to improve efficiency. It combines a permanent magnet synchronous motor and variable frequency speed control technology to achieve energy savings and efficient operation. This technology automatically adjusts the speed under varying load conditions to ensure optimal performance and minimal energy consumption.

A two-stage compression system divides the compression process into two stages, with an intercooler to lower air temperature between stages. Key advantages include:

  • Higher Efficiency: Saves up to 30% energy through optimized pressure distribution.
  • Lower Operating Temperatures: Intercooling reduces heat, extending component lifespan.
  • Durability: Reduced stress on parts ensures long-term reliability.
  • Higher Output Pressure: More efficient at handling high-pressure requirements.
  • Smooth Operation: Lower noise and vibration enhance user experience.

The two-stage compression permanent magnet variable frequency air compressor is suitable for various industrial environments, especially those with high energy efficiency and stability demands, such as manufacturing, electronics, and pharmaceutical industries. Its superior cooling system and low-noise design make it particularly effective in high-temperature, humid, or noise-sensitive environments.

  • Regularly check and replace air filters to ensure clean air supply.
  • Perform scheduled maintenance on the lubrication system according to the manual.
  • Monitor the cooling system’s operation to prevent overheating.
  • Perform self-diagnostics via the intelligent control system regularly to identify potential faults and reduce downtime.
  • Segmented Compression Reduces Energy Consumption: Two-stage compression reduces the load on each stage, effectively lowering overall power consumption.
  • Variable Frequency Technology Matches Air Demand: By adjusting output based on demand, variable frequency technology avoids the energy waste caused by frequent start-stop cycles in traditional air compressors.
  • Intelligent Start-Stop Function: The system supports automatic start and stop based on air demand, especially during nighttime or low-load periods, further reducing operating costs.

When selecting a suitable compressor, consider the following factors:

  • Air demand (flow) and working pressure
  • Working environment: temperature, humidity, and air source cleanliness
  • Electrical standards: voltage, current, and frequency requirements
  • Special needs: such as low noise or specific industry certifications
    Once this information is provided, we can help you choose the best model to maximize equipment performance and energy efficiency.

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  • Economic and Technological Development Zone, Jiangsu Provice China
  • (Whatsapp)+86 15190631062
  • engineer@minnuo.com

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