China manufacturer CHINAMFG Rand Oil-Free Rotary Screw Air Compressor (SL150 SM150 SH150) 12v air compressor

Product Description

Product description
High -efficiency design and control, Our vortex compressor has a larger flow per kilowatt, and the single-stage compression pressure is as high as 10 barg. We pass
the following design functions to achieve such high efficiency:
Start/stop control to reduce empty load energy waste;
Dual air inlet compressor design achieves stable and efficient compression;
Reduce the overall weight of the product of the aluminum shell.

Product Feature

Modular design

Multi -road design can improve efficiency under low load conditions, which means that the number of work compressors can be accurately controlled to match the needs.

Cooling running

Use large fans to ensure low temperature operation and extend the life of the component

Microorganizer control

Manage the exhaust pressure to meet your air requirements, while measuring key operating parameters to reduce accidents.

The exhaust temperature is lower

The lower CTD value rear cooler can achieve lower exhaust temperatures, reduce the post-processing intake temperature after reducing, and reduce the post-processing investment cost after selecting a small one.


Model Max.pressure barg Rated powerkW Air flow m³/min Connection size BSPT Dimensions 
Weight kg Noise level dB(A)
W2i-A8 8 2.2 0 .24 1/2″ 830×740×910 204 58
W2i-A10 10 2.2 0.21 1/2″ 204 58
W4i-A8 8 3.7 0.40 1/2″ 231 58
W5i-A8 8 5.5 0.60 1/2″ 240 59
W5i-A70 10 5.5 0.53 1/2″ 240 59
W7i-A8 8 7.7 0.84 1″ 1445×800×1000 438 62
W7i-A10 10 7.7 0.74 1″ 438 62
W11i-A8 8 11 1.20 1″ 495 64
W11i-A10 10 11 1.06 1″ 495 64
W17i-A8 8 16.5 1.89 R1 1280×770×1480 515 61
W17i-A10 10 16.5 1.5 R1 515 61
W22i-A8 8 22 2.52 R1 1330×880×1900 720 61
W22i-A70 10 22 2.0 R1 720 61
W33i-A8 8 33 3.78 R1.5 1360×1030×1670 1000 63
W33i-A10 10 33 3.0 R1.5 1000 63


Shipping Cost:

Estimated freight per unit.

To be negotiated
After-sales Service: Online
Lubrication Style: Oil-free
Cooling System: Air Cooling


air compressor

Can Oil-Free Air Compressors Be Used for Breathing Air Applications?

Yes, oil-free air compressors can be used for breathing air applications, but it is crucial to ensure that the compressor and the associated equipment meet the required standards and regulations for breathing air quality and safety. Here’s a detailed explanation of using oil-free air compressors for breathing air applications:

1. Compressor Design and Certification:

When considering the use of oil-free air compressors for breathing air applications, it is essential to select compressors that are specifically designed and certified for such purposes. Dedicated oil-free compressors designed for breathing air applications typically incorporate additional features and safeguards to ensure the production of clean and safe compressed air. These compressors undergo rigorous testing and certification processes to meet the stringent standards and regulations for breathing air quality.

2. Air Treatment and Filtration:

In breathing air applications, the compressed air must undergo thorough treatment and filtration to remove contaminants and ensure its safety for breathing. Oil-free compressors are typically equipped with advanced filtration systems, including pre-filters, coalescing filters, activated carbon filters, and sometimes additional stages such as sterile filters or high-efficiency particulate air (HEPA) filters. These filtration stages work together to eliminate particulates, moisture, odors, oil vapors, and other potential contaminants from the compressed air, ensuring its suitability for breathing air applications.

3. Compliance with Breathing Air Standards:

Oil-free compressors used for breathing air applications must comply with specific standards and regulations that define the acceptable limits for contaminants in breathing air. International standards such as ISO 8573 and national regulations, such as the Occupational Safety and Health Administration (OSHA) standards in the United States, set guidelines for breathing air quality and specify the maximum allowable levels of contaminants, including oil content, particulate matter, and moisture. Compressors used for breathing air applications should meet or exceed these standards to ensure the safety and health of individuals who rely on the compressed air for breathing.

4. Regular Maintenance and Monitoring:

To ensure the ongoing safety and quality of the breathing air produced by oil-free compressors, regular maintenance and monitoring are essential. This includes routine inspections, filter replacements, and adherence to recommended maintenance schedules. Regular monitoring of air quality parameters, such as oil content, oxygen levels, and microbiological contamination, can help identify any potential issues and ensure that the compressor continues to produce clean and safe breathing air.

It’s important to note that not all oil-free compressors are suitable for breathing air applications. It is necessary to select compressors specifically designed and certified for this purpose, ensuring they meet the required standards and regulations. Additionally, the entire breathing air system, including air storage cylinders, distribution lines, and breathing apparatus, must also meet the necessary safety standards and undergo regular inspections and maintenance.

By following these guidelines and using appropriately designed and certified oil-free compressors, it is possible to generate clean and safe breathing air for various applications, such as medical facilities, diving operations, firefighting, and respiratory protection in industrial settings.

air compressor

What Are the Energy Efficiency Benefits of Oil-Free Air Compressors?

Oil-free air compressors offer several energy efficiency benefits. Here’s a detailed explanation of the advantages of oil-free compressors in terms of energy efficiency:

1. No Energy Losses from Oil Carryover:

Oil-lubricated compressors require oil to lubricate the moving parts, which can result in oil carryover into the compressed air system. This oil carryover can lead to energy losses as it accumulates in filters, pipes, and other components. Oil-free compressors eliminate this issue by not using oil in the compression process, minimizing energy losses associated with oil carryover and reducing the need for additional energy-consuming filtration equipment to remove oil from the compressed air.

2. Reduced Friction and Mechanical Losses:

Oil-free compressors typically have advanced designs and technologies that minimize friction and mechanical losses during the compression process. The absence of oil eliminates the need for oil seals, lubrication systems, and associated energy-consuming components. This reduction in friction and mechanical losses improves the overall energy efficiency of the compressor, resulting in lower energy consumption and operating costs.

3. Optimized Air Delivery:

Oil-free compressors are designed to deliver compressed air directly without the need for additional oil removal equipment. This streamlined process eliminates the pressure drops and energy losses associated with oil separation and filtration. As a result, oil-free compressors can provide more efficient air delivery, ensuring that the compressed air reaches the intended applications with minimal energy losses.

4. Variable Speed Drive (VSD) Capability:

Many oil-free compressors are equipped with variable speed drive (VSD) technology, which allows the compressor to adjust its speed based on the actual demand for compressed air. By operating at lower speeds during periods of lower demand, VSD-equipped compressors can significantly reduce energy consumption compared to fixed-speed compressors that run at a constant speed regardless of the demand. VSD technology enables oil-free compressors to match the output precisely to the required compressed air load, resulting in energy savings and improved efficiency.

5. Improved System Control and Monitoring:

Oil-free compressors often come with advanced control and monitoring systems that enable precise management of the compression process. These systems allow for optimized operation, including load balancing, pressure control, and energy-saving modes. By closely monitoring and controlling various parameters, such as air pressure, temperature, and power consumption, the compressor can operate at the most energy-efficient levels, minimizing wasted energy and maximizing overall system efficiency.

6. Longer Service Life and Maintenance Intervals:

Oil-free compressors tend to have longer service life and maintenance intervals compared to oil-lubricated compressors. The absence of oil reduces the accumulation of deposits, contaminants, and wear on components, resulting in extended equipment life and reduced maintenance requirements. Longer service intervals mean less downtime for maintenance, allowing the compressor to operate at peak efficiency for longer periods, ultimately saving energy and reducing operational costs.

Overall, oil-free air compressors offer significant energy efficiency benefits due to reduced energy losses from oil carryover, minimized friction and mechanical losses, optimized air delivery, variable speed drive capability, improved system control and monitoring, and extended service life. These advantages make oil-free compressors an attractive option for industries and applications where energy efficiency and cost savings are paramount concerns.

air compressor

What Are the Advantages of Using Oil-Free Air Compressors?

Oil-free air compressors offer several advantages over their oil-lubricated counterparts. These compressors are designed to deliver clean, oil-free compressed air and provide benefits in various applications. Here’s a detailed explanation of the advantages of using oil-free air compressors:

1. Clean and Oil-Free Air:

The primary advantage of oil-free air compressors is that they produce compressed air that is free from oil contamination. This makes them suitable for applications where oil-free air is crucial, such as in industries like food and beverage, pharmaceuticals, electronics, and painting. Oil-free compressed air ensures product quality, prevents contamination of sensitive equipment, and eliminates the risk of oil-related issues in downstream processes.

2. Reduced Maintenance:

Oil-free compressors generally require less maintenance compared to oil-lubricated compressors. Since there is no oil to change or monitor, maintenance tasks related to oil filtration, oil changes, and oil disposal are eliminated. This can result in cost savings, reduced downtime, and simplified maintenance schedules.

3. Elimination of Oil Contamination Risk:

With oil-free compressors, there is no risk of oil contaminating the compressed air system. This eliminates the need for additional filtration or separation equipment to remove oil from the compressed air. It simplifies the overall system design, reduces the risk of oil-related equipment failure, and minimizes the maintenance and associated costs.

4. Compact and Lightweight:

Oil-free compressors are often designed to be compact and lightweight, making them portable and easy to transport. This feature is advantageous for applications where mobility is required, such as construction sites, workshops, and on-site maintenance tasks.

5. Quiet Operation:

Oil-free compressors tend to operate at lower noise levels compared to oil-lubricated compressors. The absence of oil lubrication reduces the friction and mechanical noise, resulting in quieter operation. This makes oil-free compressors more suitable for noise-sensitive environments or applications where reduced noise levels are desired.

6. Environmental Considerations:

Oil-free air compressors are environmentally friendly due to the absence of oil. They eliminate the risk of oil spills or leaks that can harm the environment. Furthermore, oil-free compressors may require less energy consumption compared to oil-lubricated compressors, contributing to energy efficiency and reduced carbon footprint.

7. Lower Initial Cost:

In general, oil-free compressors tend to have a lower initial cost compared to oil-lubricated compressors. This can be advantageous for applications with budget constraints or when the specific requirements of the application align with the capabilities of oil-free compressors.

It’s important to note that oil-free air compressors may have certain limitations compared to oil-lubricated compressors. They may have lower maximum operating pressures and higher operating temperatures. Additionally, the absence of oil lubrication may result in slightly reduced efficiency and increased wear on certain components over time.

By considering these advantages, users can determine whether oil-free air compressors are suitable for their specific application and requirements.

China manufacturer CHINAMFG Rand Oil-Free Rotary Screw Air Compressor (SL150 SM150 SH150)   12v air compressorChina manufacturer CHINAMFG Rand Oil-Free Rotary Screw Air Compressor (SL150 SM150 SH150)   12v air compressor
editor by CX 2023-10-05