Product Description
| Model : | Oil Free Series |
| Type: | Oil Free Screw Air Compressor |
| Working Pressure: | 8~12.5bar |
| Installed Motor Power: | 7.5~250 Kw |
| Capacity: | 0.81~39.30 m3/min |
| Driven Method: | Direct Driven |
| Power | 380V / 3PH / 50HZ / 60HZ 220V / 3PH / 50HZ / 60HZ 440V / 3PH / 50HZ / 60HZ 415V / 3PH / 50HZ / 60HZ Can be customized |
| Transport Package: | Standard Wooden Packing |
| Motor protection grade | IP54 |
| Insulation class | F |
| Outlet Air Humidity | ambient temperature+10ºC |
Product Features
In pharmaceutical, electronic, chemical, microbial fermentation, blow moulding, pressure detection and other industrial production, there are many medium-pressure compressed air to be used to 1.6-4.0 MPa in power plants, naval ships, national defense facilities. At present, piston air compressors are mostly used at home and abroad, while piston air compressors are characterized by large vibration, high noise, large leakage and short service life, so their efficiency is very low and the same work is done. The medium pressure oil-free screw machine has compact structure, high working efficiency, low noise, low vibration, easy maintenance, low operating cost and good air quality. At the same time, the series of machines are controlled by micro-computer system. The whole machine has multiple protective performance of pressure, temperature and overload energy.
1.Constant pressure control: high-precision constant pressure control with a pressure fluctuation range within0.01MPa.
2. Variable frequency soft start: remove CHINAMFG current during starting, avoid the power grid impact, prevent the current impact through gradual speed regulation and improve flexibility;
3.No idling: prevent idling of the compressor during running and reduce invalid energy consumption;
3.High performance vector control: low-frequency starting provides a large torque and a low running current, ensuring to get a reasonable torque to drive the air compressor to run stably with the minimum temperature rise of the motor within a wide speed range;
| Model | Working pressure | Capacity | Motor power | Noise dB(A) |
Inlet and outlet pipe dia. of cooling water | Cooling water volume |
Lubricating water |
Dimension(mm) | Net weight | Air outlet | ||
| bar | m3/min | kw/hp | Inlet water temp. 32ºC(T/H) |
L | L*W*H | KGS | ||||||
| SGM08 | 8 | 1.17 | 7.5/10 | 58 | 3/4″ | 2 | 10 | 800*800*1100(A) 800*800*1100(W) |
470 | 3/4″ | ||
| 10 | 1.05 | |||||||||||
| 12.5 | 0.81 | |||||||||||
| SGM11 | 8 | 1.65 | 11/15 | 60 | 1″ | 2.5 | 26 | 1200*760*1300(A) 1200*760*1300(W) |
580 | 3/4″ | ||
| 10 | 1.42 | |||||||||||
| 12.5 | 1.10 | |||||||||||
| SGM15 | 8 | 2.43 | 15/20 | 63 | 1″ | 3.5 | 26 | 1200*760*1300(A) 1200*760*1300(W) |
620 | 3/4″ | ||
| 10 | 2.17 | |||||||||||
| 12.5 | 1.80 | |||||||||||
| SGM18 | 8 | 3.13 | 18.5/25 | 65 | 1″ | 4 | 30 | 1400*900*1450(A) 1400*900*1450(W) |
680 | 1″ | ||
| 10 | 2.82 | |||||||||||
| 12.5 | 2.05 | |||||||||||
| SGM22 | 8 | 3.52 | 22/30 | 65 | 1″ | 5 | 30 | 1400*900*1450(A) 1400*900*1450(W) |
730 | 1″ | ||
| 10 | 3.21 | |||||||||||
| 12.5 | 2.78 | |||||||||||
| SGM30 | 8 | 5.12 | 30/40 | 67 | 1 1/2″ | 7 | 40 | 1550*1150*1500(A) 1500*1150*1300(W) |
1100 | 1 1/4″ | ||
| 10 | 4.43 | |||||||||||
| 12.5 | 3.63 | |||||||||||
| SGM37 | 8 | 6.30 | 37/50 | 67 | 1 1/2″ | 9 | 40 | 1550*1150*1500(A) 1500*1150*1300(W) |
1150 | 1 1/4″ | ||
| 10 | 5.33 | |||||||||||
| 12.5 | 4.77 | |||||||||||
| SGM45 | 8 | 7.40 | 45/60 | 68 | 1 1/2″ | 10 | 90 | 1800*1300*1750(A) 1800*1300*1680(W) |
1390 | 2″ | ||
| 10 | 6.30 | |||||||||||
| 12.5 | 5.56 | |||||||||||
| SGM55 | 8 | 9.60 | 55/75 | 70 | 1 1/2″ | 12 | 120 | 1980*1400*1850(A) 1800*1300*1680(W) |
1470 | 2″ | ||
| 10 | 8.55 | |||||||||||
| 12.5 | 7.67 | |||||||||||
| SGM75 | 8 | 13.00 | 75/100 | 73 | 1 1/2″ | 18 | 120 | 2100*1600*1900(A) 1800*1300*1750(W) |
2250 1630 |
2″ | ||
| 10 | 11.50 | |||||||||||
| 12.5 | 9.70 | |||||||||||
| SGM90 | 8 | 14.80 | 90/120 | 73 | 1 1/2″ | 20 | 180 | 2400*1600*2000(A) 2200*1550*1800(W) |
2650 2350 |
2 1/2″ | ||
| 10 | 13.90 | |||||||||||
| 12.5 | 12.60 | |||||||||||
| SGM110 | 8 | 19.85 | 110/150 | 78 | 2″ | 24 | 180 | 2700*1600*2100(A) 2200*1550*1800(W) |
2950 2460 |
2 1/2″ | ||
| 10 | 16.66 | |||||||||||
| 12.5 | 15.56 | |||||||||||
| SGM132 | 8 | 23.10 | 132/175 | 78 | 2″ | 30 | 240 | 3000*1700*2250(A) 2200*1550*1800(W) |
3500 2500 |
2 1/2″ | ||
| 10 | 19.97 | |||||||||||
| 12.5 | 16.90 | |||||||||||
| SGM160 | 8 | 28.11 | 160/200 | 80 | 3″ | 35 | 240 | 3000*1800*2100(W) | 3700 | 3″ | ||
| 10 | 25.45 | |||||||||||
| 12.5 | 22.52 | |||||||||||
| SGM185 | 8 | 33.97 | 185/250 | 80 | 3″ | 38 | 300 | 3000*1800*2100(W) | 3750 | 3″ | ||
| 10 | 29.00 | |||||||||||
| 12.5 | 25.21 | |||||||||||
| SGM200 | 8 | 36.75 | 200/275 | 80 | 4″ | 42 | 300 | 3100*1850*2100(W) | 3900 | 4″ | ||
| 10 | 32.78 | |||||||||||
| 12.5 | 29.24 | |||||||||||
| SGM220 | 8 | 39.67 | 220/300 | 80 | 4″ | 47 | 360 | 3100*1850*2100(W) | 4200 | 4″ | ||
| 10 | 36.75 | |||||||||||
| 12.5 | 29.63 | |||||||||||
| SGM250 | 8 | 43.50 | 250/350 | 80 | 4″ | 53 | 360 | 3100*1850*2100(W) | 4600 | 4″ | ||
| 10 | 39.30 | |||||||||||
| 12.5 | 34.00 | |||||||||||
| Motor Protection Class:IP54/IP55 or as per your requests. | ||||||||||||
| Voltage: 380V/50Hz/3ph, 380V/60Hz/3ph, 220V/50Hz/3ph, 220V/60Hz/3ph, 440V/50Hz/3ph, 440V/60Hz/3ph, or as per your requests. | ||||||||||||
| In the external dimensions: “A” means air cooling, and “W” means water cooling. | ||||||||||||
Q1: What is the rotor speed for the air end?
A1: 2980rmp.
Q2: What’s your lead time?
A2: usually, 5-7 days. (OEM orders: 15days)
Q3: Can you offer water cooled air compressor?
A3: Yes, we can (normally, air cooled type).
Q4: What’s the payment term?
A4: T/T, L/C, Western Union, etc. Also we could accept USD, RMB, and other currency.
Q5: Do you accept customized voltage?
A5: Yes. 380V/50Hz/3ph, 380V/60Hz/3ph, 220V/50Hz/3ph, 220V/60Hz/3ph, 440V/50Hz/3ph, 440V/60Hz/3ph, or as per your requests.
Q6: What is your warranty for air compressor?
A6: One year for the whole air compressor(not including the consumption spare parts) and technical supports can be provided according to your needs.
Q7: Can you accept OEM orders?
A7: Yes, OEM orders are warmly welcome.
Q8: How about your customer service and after-sales service?
A8: 24hrs on-line support, 48hrs problem solved promise.
Q9: Do you have spare parts in stock?
A9: Yes, we do.
Q10: What kind of initial lubrication oil you used in air compressor?
A10: TOTAL 46# mineral oil.
If you are interested in any of our products,please feel free to contact us.
We are looking CHINAMFG to cooperating,growing and developing with your sincerely.
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| After-sales Service: | Online Support, Dispatched Engineers |
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| Warranty: | 1 Year |
| Lubrication Style: | Oil-free |
| Customization: |
Available
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Shipping Cost:
Estimated freight per unit. |
about shipping cost and estimated delivery time. |
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| Payment Method: |
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Initial Payment Full Payment |
| Currency: | US$ |
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| Return&refunds: | You can apply for a refund up to 30 days after receipt of the products. |
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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.
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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.
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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.
editor by CX 2024-01-09