China supplier 250kw Variable Speed Drive Mute AC Two Stage Rotary Screw Oil Free Dry Air Compressor with high quality

Product Description

      

   Specification
  Model Capacitiy (FAD)M3/min Power kw Noise level db Weight KG
7bar 8.5bar 10bar Water Cooling Air Cooling
OFA1 OFA15 2.4 2.1 1.8 15 74   1,030
OFA22 3.7 3.2 2.7 22 74   1,070
OFA30 4.8 4.4 4.0 30 74   1,300
OFA37 5.9 5.3 5.0 37 74   1,355
OFA45 7.0 6.5 6.1 45 74   1,390
OFA2 OFA55 9.2 7.9 7.3 55 74   1,860
OFA75 12.2 11.2 10.7 75 74   1,935
OFA90 14.7 13.5 12.7 90 74   2,000
OFA3 OFA110 19.3 17.2 16.0 110 74   3,660
OFA132 22.9 19.5 18.8 132 74   3,700
OFA4 OFA160 29.4 25.7 23.8 160 74   5,300
OFA200 36.6 33.1 30.4 200 74   5,380
OFA250 44.5 41.0 37.4 250 74   5,450
OFA275 47.4 43.0 41.0 275 74   5,500
OFA5 OFA315 51.5 47.6 46.0 315 74   6,000
OFA355 56.3 52.6 50.4 355 74   9,050
OFW1 OFW37 5.9 5.3 5.0 37 74 1,355  
OFW45 7.0 6.5 6.1 45 74 1,450  
OFW2 OFW55 8.8 7.9 7.3 55 74 1,800  
OFW75 11.9 11.2 10.7 75 74 1,850  
OFW90 14.3 13.5 12.7 90 74 1,925  
OFW3 OFW110 19.1 17.1 16.0 110 74 2,635  
OFW132 21.9 19.6 18.9 132 74 2,760  
OFW4 OFW160 28.3 26.1 24.2 160 74 3,850  
OFW200 36.1 33.1 30.4 200 74 4,000  
OFW250 43.1 41.0 37.0 250 74 4,100  
OFW275 46.4 43.0 41.0 275 74 4,300  
OFW5 OFW315 50.9 47.6 46.0 315 74 6,550  
OFW355 56.3 52.6 50.4 355 74 6,950  
OFW400 62.1 57.8 55.8 400 74 7,050  
OFW450 76.5 71.5 63.8 450 74 8,400  
OFW500 83.9 78.3 73.1 500 74 8,400  
OFW630 102.9 95.7 89.0 630 74 9,125  
OFW750 122.8 109.6 101.8 750 74 9,225  

                                             Company Profile

ZheJiang Napu compressor Technology Co.,LTD was established in 2012  based in ZheJiang ,specializing in oil-free rotary screw air compressors, offering a wide range of products from airends to compressors . 
       With over 10 years experience in oil free screw air compressor. NAPU Compressor is compliant with ISO 8573-1, Class 0 standard and audited by TUV Rheinland and China National Quality Inspection Center of Compressor and Refrigerator.   
        The company is also compliant with ISO 9001:14001 and is CHINAMFG in the domestic market for its quality-driven culture. The oil-free compressors manufactured by the company are used in a variety of sectors including some of our valued clients like CASC-China Aerospace Science Corporation, NORINCO-China North Industries Group, CNNC-China National Nuclear Group, CHANG AN AUTO, SINOPHARM, BYD and CALT and Sino-Chemical etc.
         Continuous improvement in productivity and efficiency is our goal, and we continue to offer an extensive services including our own branded oil-free compressor package as well as after-sales services for other leading brands.

 

                                              Product Features

1. In house designed airend
2. 100% oil free air certified by Germany TUV.
3. Double-layer structure to reduce he noise.
4. Air Cooling and Water cooling are available.
5. VSD control are available.
6.Touch Screen PLC with preset running schedule, more intelligent control.
7.OEM&ODM service are accepted

 

                                                         FAQ

Q1. Are you trading company or manufacture ?
A: We are professional manufacture of oil free air compressors. More than 20 years of experience in air compressor manufacturing.
 
Q2. What’s payment term ?
A: T/T, Western Union, Paypal, Credit Card, and etc. Also we could accept USD, RMB, Euro and other currency.
 
Q3. How about your after-sales service ?
A: 1.We can provide customers with installation and commissioning online instructions.
   
Q4. How about your warranty?
A: One year for the whole machine and 5 years for screw air end, except consumable spare parts.
 
Q5. Do you have any certificate ?
A: Yes, we can offer CE ,ISO  and certificate as clients’ demande.
 
 
Q6. How do you control quality ?
A: 1. The raw materials are strictly inspected
    2. Each compressor must pass at least 8 hours of continuous testing before leaving the factory.
  
Q7.How long could your air compressor be used?
A: Usually, more than over 10 years.

      

After-sales Service: Online Support
Warranty: 12 Months
Lubrication Style: Oil-free
Cooling System: Water Cooling
Power Source: AC Power
Cylinder Position: Horizontal
Customization:
Available

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air compressor

How Do Oil-Free Compressors Contribute to Clean Compressed Air?

Oil-free compressors play a crucial role in delivering clean compressed air for various applications. Their design and operation eliminate the risk of oil contamination, ensuring the quality and purity of the compressed air output. Here’s a detailed explanation of how oil-free compressors contribute to providing clean compressed air:

1. Elimination of Oil Contamination:

The primary advantage of oil-free compressors is that they eliminate the presence of oil in the compressed air stream. In traditional oil-lubricated compressors, lubricating oil is used to reduce friction, cool the compressor, and seal internal components. However, this oil can contaminate the compressed air, leading to potential issues in sensitive applications such as food and beverage production, pharmaceuticals, electronics manufacturing, and painting. Oil-free compressors eliminate the risk of oil carryover, ensuring that the compressed air remains free from oil contaminants.

2. Advanced Filtration Systems:

Oil-free compressors are equipped with advanced filtration systems to remove particulates, moisture, and other contaminants from the intake air. These filtration systems typically consist of pre-filters, coalescing filters, and activated carbon filters. Pre-filters remove larger particles, while coalescing filters capture smaller particles and coalesce water vapor into droplets. Activated carbon filters help eliminate odors and absorb any remaining oil vapors or hydrocarbons. These filtration stages work together to ensure that the compressed air is clean, dry, and free from contaminants.

3. Enhanced Air Quality:

By eliminating oil contamination and incorporating effective filtration systems, oil-free compressors contribute to enhanced air quality in compressed air systems. Clean compressed air is essential in applications where air purity is critical to product quality, process integrity, and the health and safety of personnel. For example, in the food and beverage industry, oil-free compressors help maintain the purity of compressed air used in food processing, packaging, and storage, preventing any potential product contamination. Similarly, in pharmaceutical manufacturing, oil-free compressors ensure that the compressed air meets the stringent air quality standards required for drug production.

4. Reduced Maintenance Requirements:

Oil-free compressors have lower maintenance requirements compared to oil-lubricated compressors. The absence of oil means there is no need for oil changes, oil filter replacements, or oil analysis. This not only reduces maintenance costs but also eliminates the risk of oil leaks or oil-related component failures. Furthermore, without oil in the system, there is no need for oil-water separation equipment, reducing the complexity and maintenance needs of the compressed air system. The simplified maintenance routine contributes to the overall cleanliness and reliability of the compressed air supply.

5. Compliance with Industry Standards:

Oil-free compressors are designed and built to comply with industry standards and regulations related to air quality and purity. These standards, such as ISO 8573, define specific limits for contaminants in compressed air, including oil content, particulate matter, and moisture. Oil-free compressors are engineered to meet or exceed these standards, ensuring that the compressed air generated is suitable for use in critical applications. Compliance with industry standards provides assurance to users that the compressed air is clean and meets the required specifications.

Oil-free compressors are highly valued in industries where clean compressed air is essential. Their ability to eliminate oil contamination, incorporate advanced filtration systems, deliver enhanced air quality, reduce maintenance requirements, and comply with industry standards makes them an ideal choice for applications that demand clean and reliable compressed air.

air compressor

Can Oil-Free Air Compressors Be Used in Cold Climates?

Yes, oil-free air compressors can be used in cold climates. Here’s a detailed explanation of the considerations and adaptations that may be necessary when using oil-free compressors in cold weather:

1. Cold-Start Capability:

Oil-free compressors should be designed and equipped with features that enable them to start and operate reliably in cold temperatures. This includes components such as low-temperature lubricants, preheating systems, and specialized insulation to prevent freezing or damage to critical parts.

2. Compressed Air Drying:

In cold climates, the moisture content in the compressed air can condense and freeze, leading to operational issues and potential damage to the compressed air system. It is crucial to incorporate proper compressed air drying equipment, such as refrigerated dryers or desiccant dryers, to remove moisture from the compressed air and prevent freezing within the system. This ensures the production of dry and reliable compressed air even in cold weather conditions.

3. Freeze Protection:

Special attention should be given to protecting the compressor and associated components from freezing. This may involve insulation, heat tracing, or the use of frost protection heaters in critical areas susceptible to freezing, such as air intakes, valves, filters, and condensate drains. Adequate insulation can help maintain optimal operating temperatures and prevent freezing-related issues.

4. Cold Weather Lubricants:

In extremely cold climates, it is essential to use specific lubricants that are designed to perform effectively at low temperatures. These lubricants should have low pour points and be capable of providing sufficient lubrication and protection to the compressor’s moving parts even in cold environments. Using the appropriate lubricants ensures reliable operation and prevents damage to the compressor during cold starts and operation.

5. Preventive Maintenance:

Regular preventive maintenance is crucial when using oil-free compressors in cold climates. It is essential to follow the manufacturer’s recommendations for maintenance tasks such as filter replacements, lubricant changes (if applicable), and inspection of critical components. Cold weather conditions can exacerbate wear and tear on equipment, so proper maintenance helps identify and address potential issues before they lead to operational problems.

6. Monitoring and Control:

Implementing advanced monitoring and control systems can provide real-time information about the compressor’s performance in cold climates. Monitoring parameters such as temperature, pressure, and system efficiency can help identify any deviations or potential issues caused by low temperatures. Additionally, control systems can optimize compressor operation and adjust parameters to ensure efficient performance in cold weather conditions.

It’s important to consult the manufacturer’s specifications and guidelines for the specific oil-free compressor model being used, as they may provide additional recommendations or requirements for operating the compressor in cold climates. Adhering to these guidelines and implementing appropriate adaptations will help ensure the reliable and efficient performance of oil-free air compressors in cold weather environments.

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 supplier 250kw Variable Speed Drive Mute AC Two Stage Rotary Screw Oil Free Dry Air Compressor   with high qualityChina supplier 250kw Variable Speed Drive Mute AC Two Stage Rotary Screw Oil Free Dry Air Compressor   with high quality
editor by CX 2023-10-02

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