L-Series Screw Compressors
L-Series Screw Compressors
- Rated Pressure: 0.8 – 1.3 MPa, 8 – 13 bar
- Air Flow @ Outlet: 0.7 – 23 m³/min
- Power: 7.5 – 132 kW, 10 – 175 hp
Features of the L-Series Screw Compressors
● Utilize a variable frequency drive to create a variable frequency speed control transmission system.
● Save energy and reduce production costs.
● Can lead to increased productivity and improved product quality.
Core Component Highlights of the L-Series Screw Compressors
Intelligent Control System
The Control System provides real-time monitoring of exhaust temperature, exhaust pressure, operating frequency, current, power, and operating status. It also allows for optional integration with an Internet of Things module and external cloud-based intelligent management system. Through a mobile device, users can remotely control and monitor the unit, including remote start and stop functions and online monitoring.
The fourth generation trinity frequency converter
Features of this converter include variable frequency control for both the permanent magnet motor and cooling fan, as well as independent fan control. It also offers precise pressure control within 0.01MPa and temperature control at around 85℃ to ensure optimal lubrication without risking overheating. The system eliminates idle energy consumption by up to 45% and prevents excess pressure, which can increase energy consumption by 7% for every 0.1MPa increase in pressure. With a variable frequency range of 30% to 100%, it offers greater flexibility than typical systems. Additionally, it uses vector gas supply calculations to ensure that the air compressor’s output matches the user’s demand at all times.
The fourth generation of high-efficiency permanent magnet motor
This motor boasts an F-class insulation rating and an IP54 protection rating, making it suitable for use in harsh environments. Its split design allows for easy maintenance and repair. The absence of a gearbox results in high transmission efficiency, as the motor and main rotor are directly connected via a coupling. An independent cooling fan ensures that the motor remains cool even when subjected to variable frequency drives. The winding is equipped with PTC/PT100 temperature protection switches to prevent demagnetization due to high temperatures. The motor has a wide speed range, high precision, and a broad air volume adjustment range. Its high-temperature magnetic material, UH, can withstand temperatures of up to 180°C without losing magnetism. Compared to ordinary motors, the permanent magnet motor has a 3%-5% higher efficiency that remains constant even at lower speeds.
| Model | Power (kW/HP) | Rated Working Pressure (bar) | Free Air Delivery (m3/min) | Dimension (mm) | Weight (kg) | Air Outlet Pipe Diameter |
|---|---|---|---|---|---|---|
| NXL-7.5F NXL-7.5V | 7.5 / 10 | 8 | 1.1 | 760*640*860 | 130 | DN15 |
| 10 | 0.85 | |||||
| 13 | 0.7 | |||||
| NXL-11F NXL-11V | 11 / 15 | 8 | 1.6 | 920*710* 1030 | 220 | DN20 |
| 10 | 1.4 | |||||
| 13 | 1.2 | |||||
| NXL-15F NXL-15V | 15 / 20 | 8 | 2.4 | 920*710* 1030 | 240 | DN20 |
| 10 | 2.1 | |||||
| 13 | 1.7 | |||||
| NXL-22F NXL-22V | 22 / 30 | 8 | 3.6 | 1050*790* 1150 | 340 | DN25 |
| 10 | 3.2 | |||||
| 13 | 2.6 | |||||
| NXL-30F NXL-30V | 30 / 40 | 8 | 5.0 | 1250*990* 1200 | 480 | DN40 |
| 10 | 3.25 | |||||
| 13 | 3.1 | |||||
| NXL-37F NXL-37V | 37 / 50 | 8 | 6.1 | 1250*990* 1200 | 500 | DN40 |
| 10 | 4.8 | |||||
| 13 | 4.5 | |||||
| NXL-45F NXL-45V | 45 / 60 | 8 | 7.5 | 1250*990* 1200 | 550 | DN40 |
| 10 | 6.2 | |||||
| 13 | 4.9 | |||||
| NXL-55F NXL-55V | 55 / 75 | 8 | 9.25 | 1750* 1230* 1560 | 950 | DN50 |
| 10 | 7.3 | |||||
| 13 | 6.7 | |||||
| NXL-75F NXL-75V | 75 / 100 | 8 | 12.0 | 1750* 1230* 1560 | 1100 | DN50 |
| 10 | 9.5 | |||||
| 13 | 8.9 |
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.
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Installation Diagram for Variable Speed Rotary Screw Type Air Compressor
Looking for the Best Compressed Air Solution for your industry?
● Share your requirements for expert evaluation (multilingual support).
● Develop customized solution, considering options such as IP level, air end and parts, screen language, remote control, appearance, voltage and temperature adaptation, etc.
● Start production after order confirmation (standard production time: 20-25 days).
● Conduct 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
What is permanent variable speed rotary screw air compressor?
A permanent variable speed rotary screw air compressor utilizes a permanent magnet synchronous motor, which does not require reactive magnetizing current and can significantly improve power factor (up to 1, even capacitive), reducing stator current and resistance losses. Additionally, there is no rotor loss during stable operation, which can reduce fan (even eliminating it in small capacity motors) and corresponding windage losses, resulting in an efficiency improvement of 2-8 percentage points compared to a regular motor of the same specifications.
Why choose high end permanent variable speed rotary screw air compressor?
High-end permanent variable speed rotary screw air compressors offer a range of benefits, including energy efficiency, reduced maintenance costs, and improved air quality. Compared to the normal type, the high end permanent a longer lifespan and can handle heavy-duty industrial applications with ease. While they may have a higher upfront cost, the long-term savings and benefits make them a worthwhile investment for many businesses.
