Tag Archives: air-compressors

China Good quality CHINAMFG AC Electric Oil Free Rotary Screw Type Air Compressor Manufacturers silent Industrial Oil Less /Oilless Air-Compressors 7.5kw 10HP 115psi 10bar IP54 portable air compressor

Product Description

Brief Introduction of oil free screw air compressor:
Air end: GHH-RAND airend. 30 years designed lifetime.
Motor: 100% rare earth permanent magnet motor. 
Inverter: Chinese No. 1 inverter can save 30% energy.
Warranty: 5 years for the air end, and 2 years for the whole compressor. 
Delivery time: 7-15 days. 
After-sales service:we have our professional after-sales technician to instruct the installation of the whole screw air compressor.    
Certificate: CE/SGS/ISO9001/ASME
We offer free pipe and valves for installation and installation diagram
Brief introduction of factory:
1. We have been engaged in r & D, production and sales of air compressors for 19 years;  
2. Our air compressor products through CE,SGS,ISO certification, with more than 20 invention patents;  
3. Our products are exported to 132 countries and regions around the world;  
4. Our air compressor provides a 5-year warranty.  
If you have specific parameters and requirements for our Rotary Screw Type Air Compressor, customization is available
Promises Every Machine Will Run Well More Than 15 years

Product Description

Model Air Flow (m³/min) Motor Power Noise Outlet Diameter Dimension Weight
7bar 8bar 10bar 13bar kw dB inch W*D*H  (mm) kg
YOF-10A 1.1  1.0  0.85  0.7  7.5 55 G3/4” 1300*800*1300 500
YOF-15A 1.8  1.65  1.5  1.3  11 56 G1” 1300*800*1300 540
YOF-20A 2.4  2.2  2.1  1.8  15 57 G1” 1520*900*1350 650
YOF-25A 3.1  3.0  2.7  2.3  18.5 58 G1” 1600*910*1350 840
YOF-30A 3.8  3.6  3.2  2.5  22 58 G1” 1650*1000*1560 870
YOF-40A 5.3  5.0  4.3  3.6  30 60 G11/4” 1650*1050*1560 980
YOF-50A 6.6  6.2  5.7  4.6  37 60 G11/4” 1700*1100*1600 1000
YOF-60A 8.0  7.7  6.9  6.0  45 63 G11/2” 2150*1300*1650 1060
YOF-75A/W 10.5  9.8  8.7  7.3  55 65 G2” 2200*1400*1650 1250
YOF-100A/W 13.6  13.0  11.3  10.1  75 67 G2” 2400*1450*1740 1480
YOF-125A/W 16.2  15.4  13.2  11.2  90 71 DN50 2550*1450*1740 2030
YOF-150A/W 20.8  19.5  16.5  13.7  110 72 DN65 2700*1550*1750 2450
YOF-175A/W 24.0  23.0  20.0  15.5  132 73 DN65 2800*1650*1750 2850
YOF-220A/W 27.8  26.0  23.5  19.5  160 75 DN65 3300*2200*2000 3750
YOF-270A/W 34.5  33.0  28.0  23.5  200 77 DN80 3300*2200*2000 4100

Product Features
1. Original GHH-RAND airend from Germany.
2. 100% oil free air certified by Germany TUV.
3. Centrifugal Fan for better cooling effect. 
4. Stainless Steel Pipe.
5. Hydraulic Inlet Valve System.
6. Special venturi tube design to help reduce the noise down.
7. Double-layer structure to reduce he noise.
8. Air Cooling and Water cooling are available.
9. VSD control are available.
10.Touch Screen PLC with preset running schedule, more intelligent control.

Detailed Photos


Gold customers

Hot sales screw type air compressor
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12.oil free air compressor ingersoll rand screw compressor
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16.Stationary Screw Compressor High air compressor


Q1. Why do customers choose us?
Yunshun Electric Machinery Co., Ltd. is a company specializing in screw air compressor for 20 years since 2001. Our German Standard production line helps us get the affirmation from our agents as well as end-user clients.

Q2. Are you a manufacturer or trading company?
We are a professional manufacturer with big modern factory in HangZhou,China.
Both OEM & ODM service can be accepted.

Q3. What’s your delivery time?
Generally 7-15 days, if urgent order, we can arrange, too.

Q4. How long is your air compressor warranty?
2 year for the whole machine and 5years for screw air end, except consumable spare parts.

 Q5. How long could your air compressor be used for? 
At least 15 years.

Q6. What’s payment term?
T/T, L/C, Western Union, Credit Card, and etc.

Q7. How about your customer service?
24 hours on-line service for all our clients.

Q8. How about your after-sales service?
1. Providing customers with installation online instructions.
2. Well-trained engineers available to overseas service.
3. PlHangZhou for oversea after-sales supporting company


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After-sales Service: 5 Years for The Air End, and 2 Years for The Whole
Warranty: 2-Year
Lubrication Style: Oil-free
Cooling System: Air Cooling
Power Source: AC Power
Cylinder Position: Horizontal


air compressor

How does variable speed drive technology improve air compressor efficiency?

Variable Speed Drive (VSD) technology improves air compressor efficiency by allowing the compressor to adjust its motor speed to match the compressed air demand. This technology offers several benefits that contribute to energy savings and enhanced overall system efficiency. Here’s how VSD technology improves air compressor efficiency:

1. Matching Air Demand:

Air compressors equipped with VSD technology can vary the motor speed to precisely match the required compressed air output. Traditional fixed-speed compressors operate at a constant speed regardless of the actual demand, leading to energy wastage during periods of lower air demand. VSD compressors, on the other hand, ramp up or down the motor speed to deliver the necessary amount of compressed air, ensuring optimal energy utilization.

2. Reduced Unloaded Running Time:

Fixed-speed compressors often run unloaded during periods of low demand, where they continue to consume energy without producing compressed air. VSD technology eliminates or significantly reduces this unloaded running time by adjusting the motor speed to closely follow the air demand. As a result, VSD compressors minimize energy wastage during idle periods, leading to improved efficiency.

3. Soft Starting:

Traditional fixed-speed compressors experience high inrush currents during startup, which can strain the electrical system and cause voltage dips. VSD compressors utilize soft starting capabilities, gradually ramping up the motor speed instead of instantly reaching full speed. This soft starting feature reduces mechanical and electrical stress, ensuring a smooth and controlled startup, and minimizing energy spikes.

4. Energy Savings at Partial Load:

In many applications, compressed air demand varies throughout the day or during different production cycles. VSD compressors excel in such scenarios by operating at lower speeds during periods of lower demand. Since power consumption is proportional to motor speed, running the compressor at reduced speeds significantly reduces energy consumption compared to fixed-speed compressors that operate at a constant speed regardless of the demand.

5. Elimination of On/Off Cycling:

Fixed-speed compressors often use on/off cycling to adjust the compressed air output. This cycling can result in frequent starts and stops, which consume more energy and cause mechanical wear. VSD compressors eliminate the need for on/off cycling by continuously adjusting the motor speed to meet the demand. By operating at a consistent speed within the required range, VSD compressors minimize energy losses associated with frequent cycling.

6. Enhanced System Control:

VSD compressors offer advanced control capabilities, allowing for precise monitoring and adjustment of the compressed air system. These systems can integrate with sensors and control algorithms to maintain optimal system pressure, minimize pressure fluctuations, and prevent excessive energy consumption. The ability to fine-tune the compressor’s output based on real-time demand contributes to improved overall system efficiency.

By utilizing variable speed drive technology, air compressors can achieve significant energy savings, reduce operational costs, and enhance their environmental sustainability by minimizing energy wastage and optimizing efficiency.

air compressor

How are air compressors employed in the mining industry?

Air compressors play a crucial role in the mining industry, providing reliable and efficient power for various mining operations. Here are some common applications of air compressors in mining:

1. Exploration and Drilling:

Air compressors are used during exploration and drilling activities in the mining industry. Compressed air is used to power drilling rigs, pneumatic hammers, and other drilling equipment. The high-pressure air generated by the compressor helps in drilling boreholes, extracting core samples, and exploring potential mineral deposits.

2. Ventilation and Air Quality Control:

Air compressors are employed in underground mining to provide ventilation and control air quality. Compressed air is used to operate ventilation fans and air circulation systems, ensuring adequate airflow and removing harmful gases, dust, and fumes from the mining tunnels and work areas.

3. Material Conveyance:

In mining operations, air compressors are used for material conveyance. Pneumatic systems powered by air compressors are utilized to transport materials such as coal, ore, and other minerals. Compressed air is used to operate pneumatic conveyors, pumps, and material handling equipment, allowing for efficient and controlled movement of bulk materials.

4. Dust Suppression:

Air compressors are employed for dust suppression in mining areas. Compressed air is used to spray water or other suppressants to control dust generated during mining activities. This helps in maintaining a safe and healthy work environment, reducing the risks associated with dust inhalation and improving visibility.

5. Instrumentation and Control:

Air compressors are used for instrumentation and control purposes in mining operations. Compressed air is utilized to power pneumatic control systems, control valves, and actuators. These systems regulate the flow of fluids, control equipment movements, and ensure the proper functioning of various mining processes.

6. Explosive Applications:

In mining, air compressors are used for explosive applications. Compressed air is employed to power pneumatic tools used for rock fragmentation, such as rock drills and pneumatic breakers. The controlled power of compressed air enables safe and efficient rock breaking without the need for traditional explosives.

7. Maintenance and Repair:

Air compressors are essential for maintenance and repair activities in the mining industry. Compressed air is used for cleaning machinery, removing debris, and powering pneumatic tools for equipment maintenance and repair tasks. The versatility and portability of air compressors make them valuable assets in maintaining mining equipment.

It is important to note that different mining operations may have specific requirements and considerations when selecting and using air compressors. The size, capacity, and features of air compressors can vary based on the specific mining application and environmental conditions.

By utilizing air compressors effectively, the mining industry can benefit from increased productivity, improved safety, and efficient operation of various mining processes.

air compressor

How do oil-lubricated and oil-free air compressors differ?

Oil-lubricated and oil-free air compressors differ in terms of their lubrication systems and the presence of oil in their operation. Here are the key differences:

Oil-Lubricated Air Compressors:

1. Lubrication: Oil-lubricated air compressors use oil for lubricating the moving parts, such as pistons, cylinders, and bearings. The oil forms a protective film that reduces friction and wear, enhancing the compressor’s efficiency and lifespan.

2. Performance: Oil-lubricated compressors are known for their smooth and quiet operation. The oil lubrication helps reduce noise levels and vibration, resulting in a more comfortable working environment.

3. Maintenance: These compressors require regular oil changes and maintenance to ensure the proper functioning of the lubrication system. The oil filter may need replacement, and the oil level should be regularly checked and topped up.

4. Applications: Oil-lubricated compressors are commonly used in applications that demand high air quality and continuous operation, such as industrial settings, workshops, and manufacturing facilities.

Oil-Free Air Compressors:

1. Lubrication: Oil-free air compressors do not use oil for lubrication. Instead, they utilize alternative materials, such as specialized coatings, self-lubricating materials, or water-based lubricants, to reduce friction and wear.

2. Performance: Oil-free compressors generally have a higher airflow capacity, making them suitable for applications where a large volume of compressed air is required. However, they may produce slightly more noise and vibration compared to oil-lubricated compressors.

3. Maintenance: Oil-free compressors typically require less maintenance compared to oil-lubricated ones. They do not need regular oil changes or oil filter replacements. However, it is still important to perform routine maintenance tasks such as air filter cleaning or replacement.

4. Applications: Oil-free compressors are commonly used in applications where air quality is crucial, such as medical and dental facilities, laboratories, electronics manufacturing, and painting applications. They are also favored for portable and consumer-grade compressors.

When selecting between oil-lubricated and oil-free air compressors, consider the specific requirements of your application, including air quality, noise levels, maintenance needs, and expected usage. It’s important to follow the manufacturer’s recommendations for maintenance and lubrication to ensure the optimal performance and longevity of the air compressor.

China Good quality CHINAMFG AC Electric Oil Free Rotary Screw Type Air Compressor Manufacturers silent Industrial Oil Less /Oilless Air-Compressors 7.5kw 10HP 115psi 10bar IP54   portable air compressorChina Good quality CHINAMFG AC Electric Oil Free Rotary Screw Type Air Compressor Manufacturers silent Industrial Oil Less /Oilless Air-Compressors 7.5kw 10HP 115psi 10bar IP54   portable air compressor
editor by CX 2024-03-15