S-Series Two-stage Air Compressor
Rated Pressure: 0.8-1.3 MPa, 8-13 bar, 116-188 psi
Air Flow@ Outlet: 4.2-75.32 m³/min
Power: 30-355 kW, 40-476 hp
Nanxiang 2- stage rotary screw air compressor features a superior end-to-end design for optimum efficiency and power savings:
● Self-developed variable speed technology which increases efficiency and offers energy savings.
● SKF Bearing , GHH RAND / Rotor Comp Air End(optional)
● Enhanced stability and reliability as well as cost-effectiveness.
● Reduce power consumption by around 35% compared to traditional frequency machines.
| Model No. / Drive Types | Power (kW/HP) | Rated Pressure (bar) | Air Flow @ Outlet(m³/min) | Dimensions (mm) | Weight (kg) | Air Outlet Pipe Diameter |
| NXS-30V NXS-30F | 30 / 40 | 8 | 5.67~6.3 | 1660*1085*1400 | 780 | DN40 |
| 10 | 4.9~5.4 | |||||
| 13 | 4.2~4.62 | |||||
| NXS-37V NXS-37F | 37 / 50 | 8 | 7.2~8 | 1660*1085*1440 | 820 | DN40 |
| 10 | 6.3~6.93 | |||||
| 13 | 5.4~5.94 | |||||
| NXS-45V NXS-45F | 45 / 60 | 8 | 8.2~9.5 | 2180*1360*1660 | 1800 | DN50 |
| 10 | 7.5~8.25 | |||||
| 13 | 6.5~7.15 | |||||
| NXS-55V NXS-55F | 55 / 75 | 8 | 12.0~12.83 | 2180*1360*1660 | 1860 | DN50 |
| 10 | 9.6~10.1 | |||||
| 13 | 8.36~8.8 | |||||
| NXS-75V NXS-75F | 75 / 100 | 8 | 16.1~17.1 | 2180*1360*1660 | 1960 | DN50 |
| 10 | 12.3~15.0 | |||||
| 13 | 10.6~12.22 | |||||
| NXS-90V NXS-90F | 90 / 120 | 8 | 19.1~20.1 | 2500*1600*1840 | 2800 | DN80 |
| 10 | 16.44~17.8 | |||||
| 13 | 14.0~14.77 | |||||
| NXS-110V NXS-110F | 110 / 150 | 8 | 21.6~25.0 | 2500*1600*1840 | 3100 | DN80 |
| 10 | 19.13~20.0 | |||||
| 13 | 16.19~17.5 | |||||
| NXS-132V NXS-132F | 132 / 175 | 8 | 26.4~28.4 | 2500*1600*1840 | 3300 | DN100 |
| 10 | 22.42~23.6 | |||||
| 13 | 19.7~21.6 | |||||
| NXS-160V NXS-160F | 160 / 215 | 8 | 32.3~34.64 | 3600*2100*2280 | 3800 | DN100 |
| 10 | 28.6~31.8 | |||||
| 13 | 24.32~26.33 | |||||
| NXS-185V NXS-185F | 185 / 250 | 8 | 34.5~39.1 | 3600*2100*2280 | 4100 | DN100 |
| 10 | 31.44~34.45 | |||||
| 13 | 26.79~29.63 | |||||
| NXS-200V NXS-200F | 200 / 270 | 8 | 40.7~44.0 | 3860*2100*2280 | 4800 | DN100 |
| 10 | 36.57~38.5 | |||||
| 13 | 31.63~33.3 | |||||
| NXS-220V NXS-220F | 220 / 300 | 8 | 45.6~48.77 | 3860*2100*2280 | 5100 | DN125 |
| 10 | 41.2~43.37 | |||||
| 13 | 32.6~36.1 | |||||
| NXS-250V NXS-250F | 250 / 335 | 8 | 50.5~54.8 | 3860*2100*2280 | 5600 | DN125 |
| 10 | 46.2~48.45 | |||||
| 13 | 40.5~42.95 | |||||
| NXS-280V NXS-280F | 280 / 375 | 8 | 56.6~59.0 | 4000*2280*2250 | 6300 | DN125 |
| 10 | 50.8~53.32 | |||||
| 13 | 42.5~45.26 | |||||
| NXS-315V NXS-315F | 315 / 420 | 8 | 62.2~65.97 | 4000*2280*2250 | 6500 | DN125 |
| 10 | 56.1~58.29 | |||||
| 13 | 47.3~49.72 | |||||
| NXS-355V NXS-355F | 355 / 475 | 8 | 74.2~75.32 | 4500*2280*2250 | 7700 | DN125 |
| 10 | 63.3~64.29 | |||||
| 13 | 52.2~54.1 |
Note:
Model number remarks: “F” as fixed speed, “V” as VSD. Due to the potentially different rotation speeds of motors, the air flow rates of fixed speed represent the minimum in the range (i.e 30kW 8 bar 5.67m³/min), while VSD can reach the maximum at full loading.
Standard voltage in 380V (+/-10%), 50Hz +/-2% and available for customized voltage 220/380/440/460V/60Hz.
In cases of elevated altitudes, extreme temperatures, excessive humidity, heavy dust exposure, or any other challenging operational environments, we can offer tailored product designs to meet your specific needs. Customization is available to align with your unique requirements.
Air End
● 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.
High- Protection Level 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 level available)
All meet the national energy efficiency standards, F-class insulation, B-class temperature rise, effectively prevent the entry of dust，SKF heavy-duty bearings ensure continuous trouble-free operation for a long time.
Ultra-Quiet Centrifugal Cooling Fan
● Ultra-quiet large air volume, frequency conversion cooling fan；
● Low loss, low noise, low power consumption；
● High heat transfer rate, quiet and efficient.
High-Efficiency
Vector Inverter
● Equipped with a standard high-frequency reactor to effectively reduce external magnetic field interference；
● Special heat dissipation design to prevent high temperature jump in summer；
● Comply with CAN standard protocol, strong anti-noise ability；
● Advanced integrated fan and motor dual-vector inverter.
Installation Diagram for Two-stage Air Compressor（Variable Speed Rotary Screw Type）
- Share your requirements for expert evaluation (multilingual support).
- Get customized solution, including IP level, air end and parts, screen language, remote control, appearance, voltage and temperature adaptation, etc.
- Production started after order confirmation (standard production time: 20-25 days).
- Rigorous quality testing before shipping.
- Lifelong technical support, original maintenance parts support, and up to 10-year warranty on the air end.
Frequently Asked Questions
Two-stage compression reduces the compression ratio of each stage and improves volumetric efficiency. Compared to single-stage, the reduced compression ratio of each stage of a two-stage compressor improves volumetric efficiency and reduces the internal and external leakage of each stage.
For example, single-stage compression screw machine rotor: the pressure at the inlet end is about 1 bar of atmospheric pressure, compressed by the rotor to an outlet pressure of 8 bar, the compression ratio of the compression process is 8/1, that is, the single-stage compressor compression ratio of 8. While the pressure at the inlet end of the dual-stage is about 1 bar of atmospheric pressure, compressed by the first-stage rotor to an outlet pressure of about 3 bar, and then into the second-stage rotor compression to enhance the pressure to the required 8 bar The compression ratio of the first stage low pressure rotor is about 3, and the compression ratio of the second stage high pressure rotor is 8/3 ≈ 2.67, i.e. the compression ratio of the second stage is about 2.67. The maximum compression ratio of the two-stage compression rotor system is about 3.
A two-stage air compressor works by compressing air in two stages. In the first stage, air is compressed to an intermediate pressure and then sent to a second cylinder where it is compressed to the final desired pressure. This allows for higher efficiency and greater power output compared to a single-stage compressor.
First, check the refrigerant pressure and ensure that the cold dryer and suction dryer are working properly. Also, make sure that the air compressor’s storage tank and filters are draining properly. Then, open the valves between the storage tank, dryers, filters, and the air compressor to ensure smooth airflow.
Next, check the oil level and look for any leaks or obstacles around the machine. If it’s a water-cooled machine, open the cooling water valve and pump, and confirm that the water pressure is normal. Finally, turn on the power and start the machine. If it has been idle for a while, start it a few times before running it continuously to avoid unnecessary malfunctions such as overheating or overload.
Related Treatment Equipments
Carbon Steel Air Tank / Air Receiver
0.3-75m³
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Aluminum Alloy Air Filter
Filter precision:
1.00 [ppm]
0.01 [ppm]
0.001 [ppm]
Refrigerated Compressed Air Dryers
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Pressure dew point: 2-10℃
