China high quality Shanghai CHINAMFG Pharmaceutical Rotary Single Screw Oil-Free Air Compressors for Clean Air air compressor parts

Product Description

ZheJiang CHINAMFG Pharmaceutical Rotary Single Screw Oil-free air compressors for clean air

Product Description

1. Overview

Oil-free screw air compressors are widely used in industries that require high-quality air sources such as medicine, food, electronics, chemicals, packaging, etc. 100% pure compressed air is a necessary measure to ensure process and product quality, and high-end products that can be produced risk-free and safely

The lubrication system in oil-free screw air compressors is a separated oil supply circulation unit, the compression chamber and the bearing are tightly separated by a high-performance mechanical seal assembly. The lubricating oil can only flow in the enclosed area and cannot enter the compression chamber. The compressed room is pure air that is not contained. After a little treatment of water and dust removal, 100% pure compressed air can be obtained

The oil-free screw air compressor compresses the air through a two-stage screw rotor, and removes the water in the compressed air through a water-gas separator. At the same time, because there is no spread oil cooling, a pre-cooler, intercooler, and after-cooler are generally configured to cool the compressed air to reach the required exhaust temperature. A shaft seal with excellent performance is used on the shaft of the rotor to prevent lubricating oil from leaking into the compressed air to achieve true oil-free.

2. Characteristic
(1) Technical specification:

  • The air compressor can be driven by fixed frequency or variable frequency, with precise control, saving at least 30% of energy consumption
  • The air compressor can realize remote real-time monitoring and intelligent maintenance
  • The air compressor can adopt a touch screen intelligent controller with powerful control and communication functions

(2) Characteristic:

  • The screw main engine uses three-wire meshing, non-equal width tooth technology, meshing pair water film contact, no wear, good force balance
  • The screw main engine, pipes, and parts are all made of corrosion-resistant special stainless steel materials
  • Using bearings, independent internal air-sealing technology, to ensure that the lubricating water will never contact the bearing, and to maintain the service life of the bearing


  • The conventional process flow of the air compressor system: air compressor → gas storage tank → precision filter → refrigerated dryer → adsorption dryer → precision filter → precision filter → activated carbon filter → gas storage tank
  • Unique water filtration and lubrication system to ensure good lubrication, sealing, noise reduction and cooling functions
  • 100% pure and oil-free, 100% oil-free compression system, low noise, super energy saving;
  • Ideal isothermal compression: Since the cooling performance of water is much higher than air compressor oil’ s cooling performance, the operating temperature of the oil-free screw air compressor is only 40°C, which is close to the suction temperature, achieving high-efficiency ideal isothermal compression
  • Reliable and user-friendly design, reasonable layout, simple and fast service channel, easy maintenance or fault repair
  • The back end of the air compressor can be equipped with supporting equipment and systems such as refrigerated CHINAMFG dryer, adsorption dryers, precision filters, gas storage tanks, etc.
  • The air compressor can choose the gas output of 1-60m³/min, the pressure is 7bar  

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After-sales Service: Video Online, Field Installation
Warranty: 1 Year
Lubrication Style: Oil-free


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Currency: US$
Return&refunds: You can apply for a refund up to 30 days after receipt of the products.

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 Is the Impact of Oil-Free Technology on Compressed Air Quality?

The use of oil-free technology in compressed air systems has a significant impact on ensuring high-quality compressed air. Here’s a detailed explanation of the impact of oil-free technology on compressed air quality:

1. Elimination of Oil Contamination:

Oil-free technology ensures that the compressed air produced is free from oil contamination. Traditional compressors that use oil lubrication can introduce oil particles, aerosols, and vapors into the compressed air stream. These oil contaminants can have detrimental effects on downstream equipment, processes, and products. By eliminating oil from the compression process, oil-free technology helps maintain the purity and cleanliness of the compressed air, ensuring that it meets the required air quality standards.

2. Avoidance of Oil-Related Issues:

Oil contamination in compressed air systems can lead to various issues. Oil can cause damage to pneumatic equipment, valves, and seals, resulting in reduced efficiency and increased maintenance costs. It can also lead to product contamination in industries such as food and beverage, pharmaceuticals, and electronics manufacturing. Oil-free technology eliminates the risks associated with oil-related issues, ensuring that the compressed air remains clean, dry, and suitable for sensitive applications.

3. Enhanced Air Purity:

Oil-free compressors are designed with advanced filtration systems to further enhance air purity. These filtration systems typically include pre-filters, coalescing filters, and activated carbon filters. Pre-filters remove larger particles, coalescing filters capture smaller particles and coalesce water vapor, and activated carbon filters absorb odors and remaining oil vapors. By incorporating such filtration stages, oil-free technology ensures that the compressed air is free from particulate matter, moisture, odors, and residual oil content, resulting in higher air purity levels.

4. Compliance with Air Quality Standards:

Oil-free technology helps compressed air systems comply with air quality standards and regulations. Standards such as ISO 8573 specify acceptable limits for contaminants in compressed air, including oil content, particulate matter, and moisture. Oil-free compressors, with their ability to produce clean and oil-free compressed air, facilitate compliance with these standards. This is particularly crucial in industries where air quality is critical, such as healthcare, pharmaceuticals, electronics, and food processing.

5. Protection of Sensitive Applications:

Many applications require clean and uncontaminated compressed air to ensure optimal performance and product integrity. Oil-free technology provides the necessary assurance of air quality for these sensitive applications. Industries such as medical devices, laboratory testing, spray painting, and semiconductor manufacturing rely on oil-free compressed air to prevent contamination, maintain precise operation, and achieve consistent results. The use of oil-free technology safeguards the reliability and integrity of these applications.

6. Reduced Maintenance and Downtime:

Oil-free compressors generally require less maintenance compared to oil-lubricated compressors. The absence of oil eliminates the need for oil changes, oil filters, and associated maintenance tasks. This results in reduced maintenance costs, less downtime, and increased productivity. Additionally, the risk of oil-related failures and breakdowns is minimized, leading to improved overall system reliability and uptime.

In summary, oil-free technology has a significant positive impact on compressed air quality. It eliminates oil contamination, avoids oil-related issues, enhances air purity, facilitates compliance with air quality standards, protects sensitive applications, and reduces maintenance and downtime. These benefits make oil-free technology a preferred choice in industries where clean and high-quality compressed air is essential.

air compressor

How Does an Oil-Free Air Compressor Work?

An oil-free air compressor, also known as an oilless air compressor, operates using alternative methods to achieve compression without the need for lubricating oil. These compressors employ various techniques to deliver clean, oil-free compressed air. Here’s a detailed explanation of how an oil-free air compressor works:

1. Dry Compression:

In oil-free air compressors, the compression chamber is designed to operate without any oil present. The compression process starts with the intake stroke, where ambient air is drawn into the compressor through an inlet valve. The air is then compressed in the compression chamber without any oil lubrication.

2. Friction Reduction:

Since there is no oil in the compression chamber, special measures are taken to reduce friction and wear between the moving parts. These measures include the use of specialized materials, coatings, and surface treatments on the compressor components. These friction-reducing techniques minimize the need for lubrication and allow for efficient compression.

3. Piston Rings and Seals:

Oil-free compressors utilize advanced piston rings and seals to provide effective sealing without the need for oil lubrication. These rings and seals are designed to reduce internal leakage and ensure efficient compression. They help maintain the compression efficiency by minimizing air leakage during the compression process.

4. Cooling Mechanisms:

Oil-free air compressors often incorporate cooling mechanisms to dissipate the heat generated during compression. This helps prevent overheating and ensures the compressor operates within acceptable temperature limits. Common cooling methods include water cooling and air cooling. Water-cooled compressors use a water jacket or a separate cooling circuit to remove heat, while air-cooled compressors rely on fans and heat sinks to cool the compressor.

5. Filtration:

Oil-free compressors typically incorporate effective air filtration systems to remove contaminants, such as dust, particles, and moisture, from the intake air. These filtration systems ensure that the compressed air produced is clean and free from impurities. Depending on the application, additional filtration equipment, such as coalescing filters or activated carbon filters, may be employed to achieve specific air quality requirements.

6. Control and Safety Systems:

Oil-free air compressors are equipped with control and safety systems to monitor and regulate the compressor’s operation. These systems can include pressure switches, temperature sensors, safety valves, and control panels. They help maintain optimal operating conditions, protect the compressor from excessive pressures or temperatures, and provide safety features to prevent damage or accidents.

By employing these techniques and components, oil-free air compressors achieve compression without the need for lubricating oil. This results in clean, oil-free compressed air that is suitable for applications where oil contamination could be problematic, such as in industries like food processing, pharmaceuticals, electronics, and painting.

It’s important to note that the specific design and operation of oil-free air compressors may vary depending on the manufacturer and model. Therefore, it’s recommended to consult the manufacturer’s documentation and guidelines for detailed information on how a particular oil-free compressor works.

China high quality Shanghai CHINAMFG Pharmaceutical Rotary Single Screw Oil-Free Air Compressors for Clean Air   air compressor partsChina high quality Shanghai CHINAMFG Pharmaceutical Rotary Single Screw Oil-Free Air Compressors for Clean Air   air compressor parts
editor by CX 2024-03-29

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