China wholesaler 3.7kw Automobile Portable Oil Free Scroll Air Compressor for Electric Truck manufacturer

Product Description

Oil Free Scroll Mini Electric truck Vehicles Bus Cars Air Compressor

Technical parameters:

Technical parameters      
Model LD20571  LD30030 LD40040
Type of motor Permanent magnet synchronous AC motor
Rated power     (KW) 2.7 3 3.7
The input power AC380V/3phase AC380V/3phase AC380V/3phase
Rated speed      (r/min) 2650 2650 2850
Start mode Direct start without engine
Air flow    (m3 / min / 0.8mpa) 0.25 0.3 0.35
Rated work pressure       (Mpa) 1.0 1.0 1.0
Maximum output pressure    (Mpa) ≤1.2 ≤1.2 ≤1.2
Relief valve open pressure    (Mpa) 1.21 1.21 1.21
Gas oil content (PPM) 0 0 0
Compressed host cooling mode Mechanical one-piece forced air cooling
Exhaust air  temperature <70ºC <70ºC <70ºC
Protection level of the whole machine IP 68 IP 68 IP 68
Noise                                   (dB) 74db 75db 75db
The host working environment temperature                       ( ºC  )                      -30ºC~50ºC -30ºC~50ºC -30ºC~50ºC
Temperature sensor built-in built-in built-in
Check valve built-in built-in built-in
Dimensions (length x width x height) 452x367x355   452x367x355   452x367x355  
Weight                                (Kg) 34(including backplane) 34(including backplane) 34(including backplane)
Applicable models 5 tons truck /    
8 m below  bus
 8 tons truck /      
8.5 m below  bus
heavy card / 12m above bus

Oil Free Scroll Mini Electric Bus Vehicles Bus Cars Air Compressor

Oil free  scrollcompression is realized by rotational motion of static plate and moving plate.
The air is sucked in from the suction port at the outside of the fixed scroll. The air enclosed in the confined space is compressed towards the center when the compression chamber is becoming smaller due to the rotation movement. The compressed space becomes smallest at the center, and the air compressed to the highest limit is discharged out from the central exhaust port. The movement Figure 1-4 (Suction-Compression-Exhaust) is repeated thereby to produce compressed air without pulsation.
A reliable, high quality compressed air source is a significant part in the whole range of applications on vehicles, such as New Energy Vehicles, Electric Buses, Electric Vehicles, the EMU, Subway and Light Rail Vehicles. CHINAMFG vehicle-mounted scroll oil-free air compressor, the ideal air supply equipment for various of vehicles and rail vehicles, including Pneumatic Brake Systems, Air suspension Systems, Door Operation, Pneumatic wiper systems, Pantograph lifting, etc.

Features of Portable Pump Cars Compressor
1,GUARANTEED 100% OIL FREE OPERATION -The scroll compressor requires no lubrication, so it does not have lubricating oil replace and reducing cost of unnecessary space parts that gas separator core, oil filters, which the contribute to inefficiencies as piston-type compressors do, it gives you the following benefits:
•  Reliability -Compressed air system without oil and hydrocarbon pollution, extending the valve and cylinder fittings and other parts service life; 
•  Maintenance-free-Completely solve the problem of lubricating oil emulsification for compressors, eliminating the issue of machine performance that aiming at the cause of lubricating oil temperature;
•  Economy-There is no risk of oil leakage, so It does not require a centralized processing and additional treatment for the condensate that benefit to environmental protection.
We are specialized in providing compressed air products and solution to our customers all over the world. 

Leadway factory


Leadway in fair 

Leadway Certificate


After-sales Service: 1 Year
Warranty: 1 Year
Principle: Rotary Compressor
Application: Low Back Pressure Type
Performance: Low Noise
Mute: Mute

air compressor

What Is the Role of Air Dryers in Oil-Free Air Compressor Systems?

Air dryers play a crucial role in oil-free air compressor systems by removing moisture from the compressed air, ensuring dry and moisture-free output. Here’s a detailed explanation of the role of air dryers in oil-free air compressor systems:

1. Moisture Removal:

One of the primary functions of air dryers in oil-free air compressor systems is to remove moisture from the compressed air. During the compression process, atmospheric air is compressed, leading to an increase in temperature. As the compressed air cools down, the water vapor present in the air can condense, resulting in the formation of liquid water. Moisture in the compressed air can cause a range of issues, including corrosion, damage to pneumatic equipment, reduced efficiency in downstream processes, and contamination of products or processes. Air dryers effectively remove this moisture, ensuring that the compressed air remains dry and free from water vapor.

2. Condensation Prevention:

Air dryers also help prevent condensation from occurring within the compressed air system. By removing moisture from the compressed air, air dryers minimize the chances of condensation forming in the compressed air lines, storage tanks, and downstream equipment. Condensation can lead to the accumulation of water, which can cause blockages, corrosion, and other operational issues. Air dryers help maintain the integrity and reliability of the compressed air system by preventing condensation-related problems.

3. Protection of Equipment:

Moisture in the compressed air can be detrimental to pneumatic equipment and tools. Air dryers help protect this equipment by ensuring that the air supplied is dry and free from moisture. Dry air prevents corrosion of internal components, extends the lifespan of pneumatic tools, and helps maintain their optimal performance. By removing moisture, air dryers contribute to the overall reliability and efficiency of the oil-free air compressor system.

4. Purification of Compressed Air:

Air dryers also aid in the purification of compressed air by removing impurities and contaminants, including water vapor, oil droplets, and solid particles. While the primary purpose of air dryers is to remove moisture, they often incorporate additional filtration stages, such as coalescing filters or desiccant beds, to capture and remove other impurities. These filtration stages work in conjunction with the drying process to deliver clean, dry, and purified compressed air that meets the required air quality standards.

5. Optimal Performance:

Properly dried and moisture-free compressed air ensures optimal performance in various applications. In industries such as food and beverage, pharmaceuticals, electronics manufacturing, and painting, where air quality is critical, the use of air dryers is essential to meet specific air purity requirements. Dry compressed air enhances the efficiency and reliability of pneumatic systems, reducing the risk of malfunctions, downtime, and product contamination.

It’s important to note that different types of air dryers are available for oil-free air compressor systems, including refrigerated dryers, desiccant dryers, and membrane dryers. Each type has its own operating principles and suitability for different applications. The selection of the appropriate air dryer depends on factors such as the required level of dryness, the volume of compressed air, operating conditions, and specific industry requirements.

By incorporating air dryers into oil-free air compressor systems, operators can achieve and maintain dry, moisture-free compressed air, ensuring the reliability, efficiency, and integrity of downstream processes and equipment.

air compressor

What Are the Key Components of an Oil-Free Compressor System?

An oil-free compressor system consists of several key components that work together to compress air without the use of oil. Here’s a detailed explanation of the main components:

1. Air Intake:

The air intake is the entry point where ambient air is drawn into the compressor system. It typically includes a filter to prevent dust, debris, and other contaminants from entering the compressor and ensures clean air for compression.

2. Air Compressor Unit:

The air compressor unit is the core component responsible for compressing the incoming air. In an oil-free compressor system, this unit is designed to operate without the need for lubricating oil. It generally consists of one or more compression stages, each comprising a cylinder, piston, valves, and seals. The compression process raises the pressure of the air, resulting in compressed air output.

3. Compression Cooling System:

During the compression process, the air temperature increases significantly. To prevent overheating and ensure efficient operation, oil-free compressor systems employ cooling systems. These cooling systems can include air cooling or water cooling mechanisms, which help dissipate the heat generated during compression and maintain optimal operating temperatures.

4. Air/Oil Separation System:

An oil-free compressor system employs an air/oil separation system to ensure that no oil is carried over into the compressed air. This system typically consists of specialized filters or separators that remove any residual oil or oil mist from the compressed air before it leaves the compressor system. This separation process ensures that the compressed air remains oil-free.

5. Control and Monitoring Systems:

Modern oil-free compressor systems are equipped with advanced control and monitoring systems. These systems enable precise control of various parameters, such as pressure, temperature, and compressor speed. They also provide real-time monitoring of performance, efficiency, and potential issues. Control and monitoring systems allow for optimized operation, energy efficiency, and proactive maintenance.

6. Air Receiver Tank:

An air receiver tank, also known as a compressed air storage tank, is often included in oil-free compressor systems. The tank serves as a storage reservoir for the compressed air, providing a buffer to meet fluctuating air demand. It helps stabilize the pressure, reduces pressure fluctuations, and allows for more efficient usage of the compressed air in downstream applications.

7. Air Treatment Components:

Depending on the specific application requirements, oil-free compressor systems may include additional air treatment components. These components can include filters, dryers, and condensate management systems. Filters remove particulates and contaminants from the compressed air, while dryers remove moisture to ensure the production of clean, dry, and high-quality compressed air. Condensate management systems handle the separation and disposal of liquid condensate produced during the compression process.

8. Piping and Distribution System:

The piping and distribution system transports the compressed air from the compressor unit to the desired application points. It includes pipes, fittings, valves, and connectors that ensure proper airflow and distribution of the compressed air throughout the system. The piping system should be designed and sized appropriately to minimize pressure drops and optimize efficiency.

These are the fundamental components found in oil-free compressor systems. However, it’s important to note that the specific configuration and additional components may vary depending on the design, capacity, and intended application of the compressor system.

air compressor

Are Oil-Free Air Compressors More Environmentally Friendly?

Oil-free air compressors are considered more environmentally friendly compared to oil-lubricated air compressors. These compressors offer several features and advantages that contribute to their eco-friendly nature. Here’s a detailed explanation of why oil-free air compressors are considered more environmentally friendly:

1. Elimination of Oil Contamination:

One of the significant environmental benefits of oil-free air compressors is the elimination of oil contamination in the compressed air system. Oil-lubricated compressors require oil for lubrication, which can potentially leak or contaminate the compressed air. Oil contamination can have adverse effects on downstream equipment, processes, and the environment. In contrast, oil-free air compressors operate without oil, ensuring clean, oil-free compressed air and eliminating the risk of oil contamination.

2. Reduction of Oil Spills and Leaks:

Oil-lubricated compressors have a higher risk of oil spills or leaks due to the presence of lubricating oil in the system. Oil spills can have severe environmental consequences, polluting soil, water bodies, and ecosystems. Oil-free air compressors eliminate the risk of oil spills or leaks, as there is no oil used in the compression process. This reduces the potential harm to the environment and minimizes the need for costly cleanup efforts.

3. Energy Efficiency:

Oil-free air compressors can be more energy-efficient compared to oil-lubricated compressors. The absence of oil in the compression chamber reduces internal friction and mechanical losses, resulting in improved energy efficiency. Energy-efficient compressors consume less electricity, leading to reduced energy consumption and lower greenhouse gas emissions. By using oil-free compressors, businesses can contribute to energy conservation and environmental sustainability.

4. Lower Environmental Footprint:

Due to the elimination of oil-related maintenance tasks, such as oil filtration, oil changes, and oil disposal, oil-free compressors have a lower environmental footprint. These maintenance activities associated with oil-lubricated compressors require the use of resources and generate waste, including used oil and oil filters. By using oil-free compressors, the consumption of resources and the generation of hazardous waste are reduced, contributing to a more sustainable and environmentally friendly operation.

5. No Oil Contamination in Air Tools and Products:

Oil contamination in compressed air can have detrimental effects on air tools, pneumatic equipment, and end products. Oil-free air compressors ensure that the compressed air delivered to these devices is clean and oil-free. This helps maintain the performance and longevity of air tools and prevents oil-related product defects. By using oil-free compressors, businesses can avoid costly repairs or replacements of equipment and minimize the risk of producing non-conforming or defective products.

It’s important to note that while oil-free air compressors offer environmental advantages, they may have certain limitations and considerations. These include the need for specialized maintenance, potential higher operating temperatures, and reduced maximum operating pressures compared to oil-lubricated compressors. Therefore, it’s essential to evaluate the specific requirements of the application and consider the trade-offs between environmental benefits and operational considerations when choosing an air compressor.

China wholesaler 3.7kw Automobile Portable Oil Free Scroll Air Compressor for Electric Truck   manufacturer China wholesaler 3.7kw Automobile Portable Oil Free Scroll Air Compressor for Electric Truck   manufacturer
editor by CX 2023-11-07