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Stable-Run Industrial Fixed-Speed Compressor

Fixed-demand plants need not pay a variable-speed premium for constant-load duty. Luoyou's fixed speed air compressor keeps purchase cost low while delivering steady 8 bar output at 50 or 60 Hz, with fewer components to fail. Mechanical simplicity lowers repair bills, and uniform load patterns extend service life across 15-400 kW models delivering up to 72 m³/min. Built under ISO 9001 with CE marking in Shanghai. Request a load-match quote.
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A fixed-speed air compressor is driven by a motor that runs at a constant speed, determined by the supply frequency, usually 50 Hz or 60 Hz. Because the motor speed stays basically stable during operation, the exhaust volume and working state remain relatively fixed. Luoyou builds this configuration across the Stable-Run series, with models from LY-10A to LY-540A, motor power from 7.5 kW to 400 kW, and working pressures of 8 bar, 10 bar, and 13 bar.


Working Principles of the Fixed-Speed Compressor


Constant-Speed Motor Operation

The fixed-speed compressor relies on a fixed-speed motor that runs at a consistent frequency, typically 50 Hz or 60 Hz. This motor drives the compressor's air end, which is responsible for compressing atmospheric air into high-pressure compressed air. The constant speed ensures that the motor operates efficiently in stable load conditions.


Mechanical Compression Process

During operation, the air end draws in atmospheric air through an intake filter. The air is then compressed using mechanical force, reducing its volume and increasing its pressure. This compressed air is routed to an air storage tank, where it is stored until needed for downstream applications.


Air Storage and Supply Cycle

The compressed air is stored in a tank to maintain stable pressure levels. When the system pressure drops below a set threshold, the compressor restarts to replenish the supply. This cycle ensures a continuous flow of compressed air without fluctuations, making it suitable for applications that require consistent pressure.




Features of the Fixed-Speed Compressor


Simple and Durable Design

The fixed-speed compressor features a straightforward design with fewer components than variable-speed models. This simplicity reduces the risk of mechanical failure and makes the compressor highly durable in long-term operation.


Cost-Effective Purchase and Maintenance

With a lower initial purchase cost compared with variable-speed alternatives, the fixed-speed compressor is an affordable option for businesses with limited budgets. Its simple design also simplifies maintenance, reducing repair costs and downtime.


Stable Performance in Constant Loads

In applications with stable air demand, the fixed-speed compressor operates at peak efficiency, delivering consistent performance with uniform mechanical wear. This stability supports reliable operation and extends the compressor's lifespan.


Easy Installation and Operation

The compressor is designed for easy installation, requiring minimal setup time and technical expertise. Its user-friendly controls make operation straightforward, allowing staff to manage the machine without specialized training.


Versatile Application Compatibility

The fixed-speed compressor is compatible with a wide range of downstream equipment, including pneumatic tools, spray guns, and conveyor systems. It adapts to diverse industrial needs while maintaining consistent performance.




Model

Power (KW)

Pressure 

( Bar)

Output m³/min

Dia.

Noise 

( dB)

Outline ( MM )

Wt (KG)

Fixed Speed Screw Air Compressor

LY-10A

7.5

8

1.2

G3/4

66±2

800*720*950

240

10

0.95

13

0.8

LY-15A

11

8

1.6

G3/4

68±2

950*800*1070

405

10

1.4

13

1.2

LY-20A

15

8

2.4

G3/4

68±2

950*800*1070

430

10

2.0

13

1.7

LY-25A

18.5

8

2.9

G11/4

68±2

950*1100*1110

510

10

2.7

13

2.2

LY-30A

22

8

3.5

G11/4

69±2

1300*860*1135

540

10

3.2

13

2.9

LY-40A

30

8

5.0

G11/4

69±2

1300*860*1135

690

10

4.3

13

3.7

LY-50A

37

8

6.1

G11/2

70±2

1050*1050*1450

750

10

5.7

13

5.1

LY-60A

45

8

8.0

G11/2

72±2

1300*1100*1350

920

10

6.8

13

5.8

LY-75A

55

8

10.05

G2

73±2

1500*1150*1500

1500

10

7.8

13

7.3

LY-100A

75

8

13.3

G2

75±2

1900*1200*1555

1800

10

12.2

13

9.0

LY-125A

90

8

16.3

G2

75±2

2100*1250*1700

2200

10

14.6

13

12.3

LY-150A

110

8

20.6

DN65

75±2

2300*1650*2000

2900

10

17.0

13

14.2

LY-180A

132

8

24.0

DN65

75±2

2550*1650*2000

3100

10

20.6

13

16.5

LY-220A

160

8

27.0

DN80

75±2

2550*1650*2000

3300

10

23.2

13

19.7

LY-250A

185

8

30.2

DN80

78±2

2800*1750*2100

3500

10

27.0

13

22.5

LY-300A

220

8

36.4

DN100

78±2

3200*1950*2150

4500

10

33.1

13

38.5

LY-340A

250

8

42.5

DN100

78±2

3200*1950*2150

4600

10

38.8

13

34.6

LY-420A

315

8

55.6

DN125

80±2

3200*1950*2150

7000

10

49.6

13

42.7

LY-480A

355

8

65.0

DN125

82±2

4300*1650*2000

7500

10

55.0

13

48.0

LY-540A

400

8

72.0

DN150

83±2

4300*1950*2000

8100

10

62.0

13

52.5



Applications of the Fixed-Speed Compressor


Small Processing Plants and Maintenance Workshops

Small manufacturing and processing plants use the fixed-speed compressor to provide the steady compressed air needed for assembly lines, packaging equipment, and material handling. Maintenance workshops rely on the compressor for powering pneumatic tools such as wrenches, drills, and grinders, where stable performance keeps tools operating efficiently during routine repairs and maintenance.


Laboratory, Research, and Light Industrial Facilities

In laboratories and research facilities, the fixed-speed compressor delivers clean, consistent compressed air for analytical instruments, sample processing, and experimental setups, where reliability is critical for precise scientific work. Light industrial applications such as woodworking, metalworking, and textile manufacturing also use the compressor to supply the necessary air pressure for specialized machinery and processes.



FAQ


Is the Fixed-Speed Compressor suitable for applications with fluctuating air demand?

The compressor is best suited for stable air demand. While it can handle minor fluctuations, applications with significant load changes may benefit from variable-speed models, as the fixed-speed design consumes consistent power even at low demand.


How does the Fixed-Speed Compressor ensure air quality?

The compressor includes intake filtration to remove dust and debris. For enhanced air quality, it can be integrated with additional filters (such as oil and dust filters) in the compressed air system to meet specific application requirements.


What are the energy efficiency benefits of the Fixed-Speed Compressor?

While energy consumption is constant, the compressor is highly efficient in stable load conditions. Its simple design minimizes energy loss, and it avoids the energy overhead of complex variable-speed control systems.


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