China best 22-315kw 420HP Two-Stage Energy-Saving 40% Oil -Injected Rotary Screw Air Compressor near me supplier

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Product Description

22-315kw 420hp  Two-Stage Energy-Saving 40% Oil -injected Rotary Screw Air Compressor 

1. Company introduces & advtanges of ZheJiang Great Air Compressor Manufacturing :

ZheJiang Great Air compressor Co., ltd, is 1 leading manufacture and exporter of air compressor in ZheJiang , China, Founded 1957 years, coving an area of 200000 square meters. Now exporting to more than 120 countries. Has established a huge sales and service network at home and abroad.

GREAT’ s main products range as blow:
-oil-injected rotary screw air compressor(fixed speed, variable speed; medium & low pressure)
-portable rotary screw air compressor(diesel powered, electric motor powered)
– low pressure screw air compressor
– outdoor screw air compressor 
– oil free screw blower(variable speed)
-oil free air compressor( scroll type, dry type, water lubricated type)
-air treatment equipment( air dryer, air tanker, filers etc.)

All of our machines are designed for high realiable performance, easy maintenance, and maximum energy efficiency. 


Our company advantages  1. Over 60 years China professsinal manufacture for air compressor ,An ISO9000 company

2.European standard,China made &factory directly supply 

3. Superior porformance &high efficiency with reasonable price 

4.Low power consumptions for more output

5.Trouble free & cost saving

6.Timely pre-sale and after-sale service 

7.Easy operatation &maintenance  

2. Products introductions &advantages for  2 stage compression  screw air compressor :


Our products features 1.Approved by ISO9001/ SGS,/CE etc..

2.Adopt the most advanced technology and world famous brand of twin screw main machine designing and  manufacturing, no leakage, ensure high air discharge and low energy consumption.

3.  Adopt high quality electric motor with CZPT bearing, IP54, convenient maintenance and long use life.

4. Adopt world famous brand of air intake filter, oil filter, air and oil separator, realize high filtration accuracy, compressed air oil content under 3ppm, reach to international advanced standard level. 

5. Equip with the most advanced air control system. Adopt air intake valve, intelligent control system and pressure sensor combined control method, can operate by ON and OFF 2 point, stepless air capacity control system, time-delay stop and automatically start device 3 air capacity control methods, can meet different clients demand.

6.Intelligent microcomputer control system, Chinese and English language operation interface, malfunction display, alarm and machine stop automatically.

7.Adopt high quality and world famous brand of main components, like UK APD oil filter, America AMOT temperature controlling valve, SCHNEIDER electric parts and etc., high efficiency, reliable and long use life.
8. Equip with after air compression cooler combination with the air and water separator, compact structure and save space, avoid leakage and improve the air and water separating efficiency mostly.

Feature  for 2 stage compression screw air compressor :

The state clearly classifies energy efficiency levels limit value. The 2 class  energy efficiency products can save 10%~15% of the power than 3 class energy efficiency products.and the 1 class energy efficiency products  can save 10%~15% of the power than 2 class energy efficiency products. energy-saving effect is remarkable .

Energy -saving principle :

  1. Curve 12 ‘3’ is an isothermal compression process, it form the area of 613 ‘4 with Y-axis which is the indicated work of isothermal compression
  2. Curve 123” is the 1 stage compression process, it form  the area 613 ”4 with Y-axis which is the indicator work of the 1 stage compression.
  3. Curve 12, 22 ‘and 2′ 3 are the 2 stage compression process, and the sum of the area 6125 and the area 52 ’34 (6122’ 34) with Y-axis which is the indicator work of the 2 stage compression.
  4. It can be seen from the diagram that the isothermal compression process 613 ‘4 area (indicating work) is the smallest, but it is impossible to achieve isothermal compression in the air compressors’ actual compression.

The 1 stage compression has the bigger area of power 13 ‘3 than isothermal compression, while the 2 stage compression saves 22″ 33 “area of power.

Features description:

  1. Two stage compression unique air end :The two-stage compression oil-less screw machine has a unique design for air end. It combines the first-stage compression rotor and the second-stage compression rotor in a case, and rotates them directly through gears respectively, so that each stage of the rotor can obtain the best linear speed, so that the compression efficiency is higher.
  2. internal spray curtain cooling method: Two-stage compressed air compressor, using high energy saving internal spray curtain cooling method, good cooling effect, greatly reduce the temperature of compressed air, achieve close to isothermal compression, but also can reduce the pressure loss between the first and second, reduce the compression ratio, improve the compression efficiency
  3. Reduce internal leakage: Two-stage compression is adopted, which reduces the compression ratio of each compression, reduces the internal leakage from the high pressure end to the low pressure end of each compression, and improves the volume efficiency.
  4. Noise reduction: Two-stage compression is adopted, which reduces the compression ratio of each compression and greatly reduces the noise, especially the unloading noise
  5. Easy to do maintenance and service: Two-stage compressor unit, except the screw air end , other systems and structures of the unit are basically the same as single-stage compression, which brings convenience to the maintenance and use of users
  6. Reduce energy consumption: Energy-saving two-stage compression screw air compressor can effectively reduce energy consumption. Under the same power, the energy saving should be at least 15%-25% depending on different working conditions.
  7. For users with large amount of gas and continuous gas required, two-stage compressed air compressor should be given priority


  1. After 1 stage compression, coolant through multiple jet hole on the body, form the mist jet shade, to cool the hot 1 stage compressed air, greatly reduces the compressed air temperature before entering the 2 stage compression, which is near to isothermal compression process, save the energy compression effect.
  2. Even without inter-stage cooling, 2 stage compression is more efficient than single stage compression. This is because the volume of air becomes smaller after the 1 stage compression, so the 2nd stage compression can use a smaller diameter of the rotor, and the leakage rate of the unit volume is small.
  3. Reduce internal leakage: use 2 stage compression, reduce the compression ratio of each compression, reduce the leakage from the high pressure side to the low pressure side per class, and improve the volume efficiency.
  4. Noise reduction: the compression ratio of each compression is reduced by taking 2 stage compression, which greatly reduces the noise, especially the unloading noise
  5. 2 stage compression unit, except for screw air end, the other system and structure arrangement of the unit is basically the same as the single stage compression, which is convenient for the maintenance and usage to the user.
  6. For users  who need  large air consumption and continuously use, should take priority to use of a 2 stage compressed  1 class energy efficiency air compressor

TKL- Series of 1 class energy efficiency air compressor with 2 class,3 class energy efficiency comparation:

  TKL 2 class energy efficiency  3 class energy efficiency
Model TKL-200-41/8-II USD-250-8 ML-250
Cooling method  Air cooling  Air cooling  Air cooling 
Measured exhaust pressure 7bar 7bar 7bar
Nominal power  200kw 250kw 250kw
Measured input power 225.1kw 256.4kw 297.32kw
Measured exhaust capacity 41.4m³/min 41.9m³/min 42.283m³/min
Measured ratio 5.45kw(m³/min) 6.12 kw(m³/min) 7.037 kw(m³/min)
According to the national GB19153-2009 energy efficiency rating 1 class(1 class<=5.5; 2 class<=6.2;3 class<=7.1) 2 class(1 class<=5.5; 2 class<=6.2;3 class<=7.1)  3 class(1 class<=5.5; 2 class<=6.2;3 class<=7.1)
  1. Compared with the 2 class energy efficiency air compressor unit, the electricity saving cost is: Energy saving per hour(6.12-5.45)*41.4=27.738KWH  saving for 8000 hours $27.738*8000*$0.12=$26629
  2. Compared with the 3 class energy efficiency air compressor unit, the electricity saving cost is: Energy savings per hour (7.037-5.45)*4.14=65.7018KWH saving for 8000 hours $65.7018 *8000*$0.12=$63074



Product features:
“GREAT” special project screw air compressor is designed for field operation, which can operate smoothly under the harsh conditions in the wild and ensure the smooth operation of the project. Well adapt to ore docks loading and unloading, steel, electric power, coal mining enterprises, railway, bridge construction, tunnel excavation, ship manufacturing, mining and other field operation and bad environment, with a waterproof, moisture proof, dustproof design, and to consider using in more dust environment, the low temperature environment, vibration environment, especially suitable for air compressor working site space constraints which can’t install gas storage environment

Feature description: 

  1. 1. Easy to operate, only press the “start ” switch;
  2. 2. Equipped with the function of remote control to the air compressor, the remote warning contacting  can provide the warning indication of remote fault.
  3. 3. The models for outdoor with IP55 standard electrical box, absolutely ensure that the dust does not affect the internal components of the electrical box, unique design of inlet air hole which can natural cool to  the electrical box to ensure electrical life;
  4. 4. Specially designed heavy-duty air intake filter designed for dustproof working conditions to ensure that the air compressor host is free of wear and tear;
  5. 5. The contactor and thermal relay are selected for the schneider famous brand
  6. 6. The overall air intake dust proof and filtering treatment of the box body, insulate the environment dust, avoid the pollution of the internal parts of the air compressor, protect the motor and valve parts, and extend the use life of the intake filter. The special material filter plate , oil and water resistant and high temperature resistant, can be used again and again to reduce the use cost;
  7. 7. If the unit has to be installed in the vibration environment, there are anti-vibration units for user selection;
  8. 8. In order to solve the problem of oil supply problem when the air compressor is started at low temperature, there are low-temperature units for user selection;
  9. 9. Special design of the air compressor can be 0 ~ 100% capacity regulating function, according to the variation of gas consumption automatic voltage stabilizing operation, especially suitable for no tank use, no need consider to start the problem and the frequently load and unload problems

3.Technical Parameters for  GREAT 2 stage compression fixed speed screw air compressor:

Model   Working pressure (Bar) Flow Air Capacity  (m3/min) Power (Kw) Noise (dBa) Dimensions (mm) Outlet pipe size Weight (Kg)
TKL-45F-II 8 9.5 45 68 1800*1500*1510 DN50 2400
10 8.8
13 8.1
TKL-55F-II 8 11.5 55 68 1800*1500*1510 DN50 2430
10 10.9
13 10.5
TKL-75F-II 8 16.1 75 68 2470*1700*2571 DN65 2700
10 14.5
13 12.5
TKL-90F-II 8 19.8 90 68 2470*1700*2571 DN65 2800
10 16.5
13 13.5
TKL-110F-II 8 24.0 110 68 2660*1700*2571 DN65 2850
10 19.8
13 17.2
TKL-132F-II 8 28.3 132 70 2660*1700*2571 DN65 4150
10 23.2
13 19.2
TKL-160F-II 8 33.3 160 72 3460*2040*2200 DN80 5100
10 28.4
13 23.6
TKL-185F-II 8 38.5 185 72 3460*2040*2200 DN80 5200
10 33.3
13 28.4
TKL-200F-II 8 41.3 200 75 3460*2040*2200 DN80 5250
10 38.5
13 33.5
TKL-220F-II 8 45.5 220 75 3720*2220*2200 DN100 6100
10 40.8
13 37.6
TKL-250F-II 8 54.7 250 75 3720*2220*2200 DN100 6200


4.Application :

6.Certification :

7. Pakcing& shipping :

8. FAQ : 
Q1: Are you factory or trade company?  
A1: We are factory.
Q2: Warranty terms of your machine? 
A2: One year warranty for the machine and technical support according to your needs.
Q3: Will you provide some spare parts of the machines? 
A3: Yes, of course.
Q4: How long will you take to arrange production? 
A4: 380V 50HZ we can delivery the goods within 20 days. Other electricity or other color we will delivery within 30 days.
Q5: Can you accept OEM orders? 
A5: Yes, with professional design team, OEM orders are highly welcome!

9. Contact :


Choosing an Air Compressor

Considering a new Air Compressor? Here are some tips to make the decision easier. Learn the pros and cons of each type, including the differences between oil-injected and oil-free models, single stage and positive displacement. In addition, learn more about the different technologies that are available for your air compressor. It is important to choose an appropriate unit for the type of work you do. Here are some of the best compressors available today.

Positive displacement

There are several different types of air compressors, but most are positive displacement air compressors. They use a rotary or reciprocating component to compress air. The reciprocating component compresses air by reducing the volume of the chamber. Positive displacement compressors are used in bicycle pumps, chemical plants, and refrigerators. Positive displacement air compressors use multiple inlet ports. Despite the various types, the principle of operation remains the same.
Another type of positive displacement air compressor is a reciprocating piston. The piston inside a cylinder moves up and down, causing the compressed air to fill the upper part of the cylinder. These air compressors are used in a variety of different applications, including blowing bottles and gas pipelines. These air compressors can be water-cooled, lubricated, or non-lubricated. Different types have different capacities and air pressures.
A positive displacement flowmeter uses a rotating chamber that divides continuous fluid into discrete portions. The number of times the chamber is filled and discharged can be used to estimate the flow rate. The rotation speed of the measuring chamber is directly proportional to the flow rate. The drawbacks of this type of positive displacement flowmeter are that it is prone to jamming. If the fluid contains particles, it may be too thick for the meter to determine flow rate.
A negative displacement air compressor was invented in 1860 and is the oldest type of compressor. It uses 2 lobes positioned in a circular cavity. One rotor is connected to an engine, while the other pushes the other 1 to spin in the opposite direction. Negative displacement compressors are low-maintenance, but they do require more precision. They are often used in nuclear power plants because they use the kinetic energy of the rotating elements to produce pressure.


Oil-flooded or oil-injected air compressors use liquid to seal and lubricate moving parts and reduce noise. Oil-flooded air compressors are effective for a variety of pneumatic tools and accessories. Some models have a thermostat that controls the amount of oil used during operation. Other types of oil-flooded air compressors are piston-type models. Here is an overview of the basic differences between these 2 air compressors.
An oil-injected air compressor is more expensive than a comparable oil-free air compressor, but its advantages far outweigh its disadvantages. An oil-free compressor is quieter, requires less maintenance, and has a lower price tag. It also offers a greater degree of air purity. A number of other advantages may also make this type of air compressor the better choice for many industrial settings. If you need a high-pressure compressor in a tight space, consider the benefits of an oil-free system.
Oil-injected air compressors require more maintenance than oil-free models. Both types of air compressors offer similar capacity and ISO 8573-1 Class 0 and 1-2 purity, but the oil-injected systems require more air-treatment components. They require an activated carbon filter and coalescing filter. Oil-injected air compressors will likely remain the standard for industrial air compressors for many years. And since their performance and efficiency are comparable, it may be worthwhile to invest in some point-of-use air treatment.
Both types of air compressors have their benefits. However, choosing between oil-free and oil-injected air compressors is not as straightforward as you might think. Whichever type you choose, make sure it will meet your needs. The benefits of an oil-injected air compressor outweigh their disadvantages. In general, oil-injected air compressors are more durable and can last longer than oil-free models. The only downside is their higher price.


When choosing an air compressor for your company, you’ll need to determine what it is going to be used for. For example, if you’re planning on using it to power multiple workers, you should consider getting an oil-free compressor. An oil-free compressor, on the other hand, is quieter and can power several workers at a time. If you’re a contractor, the most important consideration will be the type of jobs you’ll be doing. Higher air pressure means greater demand for air flow, and more pressure can damage the equipment.
Oil-free compressed air is certified 100% free of contaminants. Technically, oil-free air is not completely free of foreign matter, but it is extremely low within the limits of practical air quality. A technically oil-free air compressor might have a total oil level of 0.003 mg/m3. If you’re in need of a technically oil-free air compressor, you must install an air treatment equipment after your current compressor.
If you’re in the manufacturing industry, a good oil-free air compressor will save you money and reduce your environmental impact. Many of these tools require air compressors to work, and this equipment will ensure that they don’t get contaminated. To buy the best oil-free compressor, you should learn a bit about the different terms used by compressor repair companies. ACFM, for example, is the amount of air that can be compressed in 1 minute at rated conditions.
When you’re using an oil-free air compressor, you should know that the overall life of the device will be much shorter. Compared to an oil-flooded rotary screw air compressor, an oil-free compressor typically has a lifespan of 50 thousand hours. But it’s important to understand that this type of compressor can still cause damage to piping and processes. Therefore, you should choose an oil-free compressor when you need to clean air for your business.


A single-stage air compressor, also known as a piston air compressor, compresses air only once before storing it in a cylinder. This stored air has enough energy to power a variety of pneumatic tools, such as screwdrivers, chisels, and wrenches. These units are also ideally suited for low-flow applications and are widely used in gas stations, auto shops, and various manufacturing plants.
A single-stage air compressor uses 2 valves – 1 for inlet and 1 for outlet – to transfer compressed air. Both valves are actuated by springs. The inlet valve has a slight curvature to provide protection from damage. The compressor’s outlet valve opens when the pressure in the cylinder is higher than the pressure in the storage tank. The piston moves very quickly inside the cylinder, exerting a high amount of force throughout the compression process. This high piston speed is a common cause of compressor wear and tear.
A single-stage air compressor is ideal for smaller tradesmen and small construction crews. Its lightweight and compact design make it easier to transport and store. While it may be tempting to buy the first cheap air compressor you see, it’s important to balance the price against performance to choose the right air compressor for your needs. The best single-stage air compressor is 1 that provides excellent performance and durability. Its two-stage counterpart is designed for larger construction teams and large applications.
The main difference between a single-stage and a two-stage air compressor lies in their capacity. A single-stage air compressor compresses air only once and delivers it into the storage tank, while a two-stage compressor compresses it twice, creating double the pressure. Because of this, single-stage air compressors are cheaper and versatile than their counterparts, which means that they can be used for multiple purposes.


A low-noise air compressor is a type of industrial compressor that is less noisy than regular air compressors. These are generally smaller machines designed for smaller factories and workshops with a few to several employees. They are designed to handle mid-weight volumes of compressed air per day. This type of compressor is especially useful for smaller manufacturing businesses that need to produce compressed air for medical applications. Small breweries can also benefit from the low-noise capabilities of these compressors.
Low-noise air compressors come in various sizes and features. For smaller jobs, you can purchase a one-gallon model that is lightweight and portable. For larger jobs, you can purchase 1 with a larger tank that can provide more pressure for longer jobs. However, a larger tank will make the compressor heavier and harder to transport. To avoid this, make sure to check the size of the tank and how much power it can handle.
Considering a low-noise air compressor for your business? If so, you’ve come to the right place. There are a variety of affordable and dependable low-noise options to choose from. A CAT 10020C, for example, is designed to provide high-volume air to many outlets at once. A CAT 10020C comes with a 10-gallon tank, wheels, and a carrying handle.
Noise levels can also affect the productivity of employees. When employees work with air compressors in close proximity to each other, they may develop tinnitus. If employees are free from tinnitus because of the loud noise, they are likely to work more efficiently. Moreover, it will be easier for them to focus and communicate efficiently. If you need a compressor, a low-noise 1 is an excellent choice.

China best 22-315kw 420HP Two-Stage Energy-Saving 40% Oil -Injected Rotary Screw Air Compressor     near me supplier China best 22-315kw 420HP Two-Stage Energy-Saving 40% Oil -Injected Rotary Screw Air Compressor     near me supplier

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