China manufacturer 4kw-90kw 10.5bar 11.26m3/Min Direct Driven Industrial Low Noise Screw Type G75 CHINAMFG Screw Air Compressor portable air compressor

Product Description

We are authorized distributer of atlas copco, we could provide whole product line of
Atlas Copco air compressors , spare parts and consumables. we are also
certified supplier by international authoritative certification

Kindly advise your technical requirements, we will recommend suitable
compressed air system and spare parts for you .

We can provide CHINAMFG One-Stop Service,and efficient energy – saving solutions for you .

Products Description

G4-90 series oil-injected screw air compressor ,if you need more professional technical support ,please contact me .

Industrial equipment, printing service, pipelines,power plants, oil&gas, oil refinery, coating, painting,
plastics, steel industry, rubber, mechanical, blow molding, color sorter machine, shipyard, sandblasting, 

Different industries correspond to different air compressors, kindly please send me your application
areas and specific conditions, then will recommend the most suitable products for you .

We can provide CHINAMFG standard packaging or OEM packaging.

1 Q: How about  the quality of products ?

   A: We are authorized distributer of Atlas Copco. Don’t worry the quality and service.

2 Q: How long is your  delivery lead time ?

   A: If there is stock, the lead time is about 3 working days after we get the payment, if need to
       be produced, it depends.

3 Q: How about your overseas after-sale service?

   A: (1)Provide customers with intallation and commissioning online instructions.

       (2)Worldwide agents and sfter service available.

4 Q: Can you accept OEM&ODM orders?

   A: Yes, we have professional design team, OEM&ODM orders are highly welcomed.


Lubrication Style: Lubricated
Cooling System: Air Cooling
Power Source: AC Power
Cylinder Position: Vertical
Structure Type: Closed Type
Installation Type: Stationary Type


air compressor

What Is the Role of Oil in Lubricated Screw Compressors?

In lubricated screw compressors, oil plays a crucial role in ensuring optimal performance, reliability, and longevity of the compressor. Here’s a detailed explanation of the role of oil in lubricated screw compressors:

Lubrication: One of the primary functions of oil in screw compressors is to provide lubrication to the moving parts, particularly the screw rotors. The oil forms a thin film between the rotors and the compressor housing, reducing friction and wear. This lubrication minimizes mechanical losses and helps maintain efficient operation by reducing energy consumption.

Sealing: Oil also acts as a sealing medium in lubricated screw compressors. The oil film created between the rotors and the compressor housing helps create a seal, preventing air or gas leakage between the high-pressure and low-pressure sides of the compressor. This sealing action is crucial for maintaining the compressors’ efficiency and preventing losses in compression performance.

Cooling: Oil plays a vital role in cooling various components of the screw compressor. As the compressed air or gas is compressed, it generates heat. The oil absorbs a significant amount of this heat and carries it away from the compression chamber. The oil then circulates through the compressor’s oil cooling system, where it dissipates the heat to the surrounding environment or through an oil cooler. Efficient oil cooling helps prevent overheating of the compressor components, ensuring reliable operation and extending the compressor’s lifespan.

Cleaning: The oil in lubricated screw compressors acts as a cleaning agent. It carries away contaminants, such as dirt, dust, and metal particles, that may enter the compressor during operation. The oil passes through filters and separators, removing these impurities and preventing them from accumulating in the compressor’s internal components. Clean oil helps maintain the integrity of the compressor’s internal parts and reduces the risk of damage or malfunctions.

Sealing Element Lubrication: In some lubricated screw compressors, the oil also serves to lubricate the sealing elements, such as the shaft seals or labyrinth seals. Proper lubrication of these seals helps maintain their effectiveness in preventing oil leakage and maintaining the separation between the oil and the compressed air or gas.

Corrosion Protection: Oil in screw compressors often contains additives that provide corrosion protection to the internal components. These additives form a protective layer on the metal surfaces, preventing corrosion caused by moisture or contaminants present in the compressed air or gas. Corrosion prevention helps maintain the compressor’s performance, efficiency, and reliability over time.

It’s important to note that lubricated screw compressors require regular oil monitoring, oil analysis, and oil changes to ensure optimal performance. The oil level, quality, and viscosity should be regularly checked and maintained within the manufacturer’s recommended specifications.

In summary, oil in lubricated screw compressors serves crucial functions such as lubrication, sealing, cooling, cleaning, sealing element lubrication, and corrosion protection. These functions collectively contribute to the efficient and reliable operation of the compressor, extending its service life and minimizing maintenance requirements.

air compressor

How Do You Maintain the Air Quality in a Screw Compressor System?

Maintaining air quality in a screw compressor system is crucial to ensure the performance, efficiency, and reliability of the compressed air. Here’s a detailed explanation:

1. Proper Intake Filtration:

Install high-quality intake filters to prevent contaminants, such as dust, dirt, and debris, from entering the screw compressor system. These filters should have an appropriate filtration rating to effectively capture particles of the desired size. Regularly inspect and clean or replace the intake filters to maintain their effectiveness.

2. Compressed Air Dryers:

Use compressed air dryers, such as refrigerated dryers or desiccant dryers, to remove moisture from the compressed air. Moisture can lead to corrosion, damage to pneumatic equipment, and compromised air quality. The type of dryer selected depends on the specific application requirements and the desired level of moisture removal.

3. Oil Removal Filters:

In oil-injected screw compressors, oil is used for lubrication, which can contaminate the compressed air. Install oil removal filters downstream of the compressor to remove any oil carryover from the compressed air. These filters typically use coalescing technology to separate and trap oil particles, ensuring clean air quality.

4. Condensate Management:

Effectively manage condensate, which is formed when moisture in the compressed air condenses as it cools. Install condensate drains and separators to remove and properly dispose of condensate. Improper condensate management can lead to water contamination in the compressed air system.

5. Regular Maintenance:

Perform regular maintenance tasks as recommended by the manufacturer, including oil changes, filter replacements, and inspections. Proper maintenance helps ensure that the compressor system operates efficiently and minimizes the risk of contaminants entering the compressed air.

6. Air Receiver Tank Maintenance:

If the screw compressor system includes an air receiver tank, regularly inspect and clean the tank to remove any accumulated debris or contaminants. Additionally, ensure that the tank’s drain valve is functioning correctly to remove any water or condensate from the tank.

7. Leak Detection and Repair:

Regularly inspect the compressed air system for leaks. Leaks not only waste energy but also allow contaminants from the surrounding environment to enter the system. Use appropriate leak detection methods, such as ultrasonic detectors or soapy water solutions, to identify and promptly repair any leaks.

8. Monitor and Control Operating Conditions:

Monitor and maintain proper operating conditions within the screw compressor system. This includes monitoring discharge pressure, temperature, and other relevant parameters to ensure they are within acceptable ranges. Implement appropriate control strategies, such as regulating compressor capacity or adjusting dryer settings, to optimize air quality while meeting the specific application requirements.

9. Training and Awareness:

Provide training to operators and maintenance personnel on the importance of air quality in a screw compressor system. Ensure they understand proper maintenance procedures, the significance of filtration, and how to identify and address potential air quality issues.

10. Compliance with Regulations:

Be aware of and comply with relevant regulations and standards governing air quality in your specific industry or application. This may include adherence to guidelines such as ISO 8573, which specifies air purity classes for different contaminants in compressed air systems.

By following these practices, you can maintain the air quality in a screw compressor system, ensuring clean, reliable, and high-quality compressed air for various applications.

air compressor

Can Screw Compressors Be Used in Industrial Applications?

Yes, screw compressors are widely used in industrial applications and are well-suited for various industrial processes. Here’s a detailed explanation:

1. Manufacturing and Assembly:

Screw compressors find extensive use in manufacturing and assembly processes. They provide a reliable source of compressed air for powering pneumatic tools, such as drills, impact wrenches, and spray guns. Compressed air is also used for operating pneumatic cylinders and valves, facilitating automation and control in industrial production lines.

2. Industrial Automation:

In industrial automation systems, screw compressors play a crucial role in providing compressed air for actuating control valves, operating robotic arms, and powering pneumatic actuators. The continuous and reliable supply of compressed air from screw compressors ensures the smooth operation of automated machinery and equipment.

3. HVAC Systems:

Screw compressors are commonly used in large-scale heating, ventilation, and air conditioning (HVAC) systems. They are employed in chillers, which cool water or air for air conditioning and refrigeration purposes. Screw compressors in HVAC systems offer high energy efficiency, making them cost-effective and environmentally friendly options for large commercial and industrial buildings.

4. Food and Beverage Industry:

The food and beverage industry relies on screw compressors for various applications. They are used for providing compressed air in food processing and packaging operations, such as pneumatic conveying, filling, labeling, and sealing. Screw compressors used in this industry are often of the oil-free type to ensure air purity and prevent contamination of food products.

5. Pharmaceuticals and Healthcare:

In the pharmaceutical and healthcare sectors, screw compressors are vital for critical applications. They provide clean and oil-free compressed air required for pharmaceutical manufacturing processes, including tablet coating, fermentation, lyophilization, and cleanroom operations. Screw compressors with strict air quality standards, such as oil-free and contaminant-free options, are commonly used in these industries.

6. Energy and Power Generation:

Screw compressors play a significant role in energy and power generation facilities. They are used for processes such as gas compression, pneumatic conveying of coal and biomass, and control air supply in power plants. Screw compressors in these applications are designed to handle high pressures and large volumes of gas.

7. Mining and Construction:

In mining and construction industries, screw compressors are employed for various tasks. They power pneumatic tools and equipment used in drilling, rock blasting, material handling, and construction activities. Screw compressors are valued for their reliability, continuous operation, and ability to withstand harsh operating conditions.

8. Oil and Gas Industry:

The oil and gas industry extensively uses screw compressors for gas compression and processing. Screw compressors are employed in natural gas pipelines, gas processing plants, and refineries. They handle the compression of gases, such as natural gas, hydrogen, and process gases, ensuring efficient transportation and refining operations.

These are just a few examples of the industrial applications where screw compressors are commonly used. Their high efficiency, continuous operation, compact design, and capacity flexibility make them well-suited for a wide range of industrial processes and systems.

China manufacturer 4kw-90kw 10.5bar 11.26m3/Min Direct Driven Industrial Low Noise Screw Type G75 CHINAMFG Screw Air Compressor   portable air compressorChina manufacturer 4kw-90kw 10.5bar 11.26m3/Min Direct Driven Industrial Low Noise Screw Type G75 CHINAMFG Screw Air Compressor   portable air compressor
editor by CX 2023-11-08

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