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Top 10 Air Compressor Manufacturers in the World

sollant — Sun, 12 Apr 2020 18:55:02 +0000

There are many excellent air compressor companies in the world. If you want to understand the air compressor industry, please follow our article for an in-depth understanding.

History of the compressor industry in the world

Around 1800, the first single-stage (reciprocating plug) air compressor was made in the UK with a discharge pressure of 1.38MPa (gauge pressure).

In 1902, Ingersoll Rand made the first mobile reciprocating air compressor in the United States. An industrial-grade air compressor was born in Atlas Copco laboratory in Sweden at the beginning of the 20th century, which revealed the extensive use of compressed air in industrial production.

Because the medium of the compressed air system is air, it is safe and suitable for long-distance transportation, and plays an irreplaceable role in many high-risk industries, such as flammable and explosive chemical industry, coal mine, etc.; some high-end manufacturing industries, such as precision electronics, medicine, aerospace, etc., rely on high-quality compressed air more urgently.

After a hundred years of wind and rain, but because of its technical evolution, it has been weak. Due to its own structure, the piston air compressor has high energy consumption, high vibration and noise, high failure rate, and many vulnerable parts.

After a long time of use, the piston ring seal leaks due to wear and tear, so that the lubricating oil overflows the unit, causing oil pollution everywhere in the machine room and a poor working environment.

These can be said to be fatal defects of the piston air compressor. After the invention of the twin-screw air compressor in the late 1930s, these defects were well solved. It can also be said that the original intention of the invention of the twin-screw air compressor is to avoid the defects of the piston air compressor.

In 1961, we successfully developed the oil injection screw refrigeration compressor and screw process compressor, and then continued the basic theoretical research and product development test.

Through the continuous improvement of the rotor profile and the successful development of the special rotor processing equipment, the superior performance of the screw compressor has been continuously brought into play.

In the history of technology, the screw compressor with high reliability has been used to replace the vulnerable and reliable parts The piston compressor with poor performance has become an inevitable trend.

The proportion of screw compressors in Japan was only 27% in 1976, and it increased to 85% in 1985.

At present, the market share of screw compressors in western developed countries is 80% and keeps rising. Screw compressor has the advantages of simple structure, small volume, no wearing parts, reliable, long service life, simple maintenance and so on.

About 30 years after the advent of the twin-screw air compressor, that is, in the 1960s, the single screw air compressor was developed, and its design became more reasonable and advanced.

Single screw compressor overcomes the disadvantages of imbalance and bearing vulnerability of twin-screw compressor; it has the advantages of long service life, low noise and more energy saving, but there are many moving parts of single screw air compressor, the meshing accuracy will gradually decline with the use time, the volumetric efficiency will decline, and currently there is no suitable planetary material to meet the characteristics of high strength, strong wear resistance and small expansion, so it is difficult to use

The current technology, a twin-screw air compressor is not only advanced technology but also in practical use has been fully mature, has been widely used in various industries.

Air compressors are widely used in the market, second only to electricity, so major air compressor companies have also put a lot of effort into technology and publicity.

This article lists the top 10 compressor manufacturers in the world.

Atlas Copco– Sweden

AC is a multinational group headquartered in Sweden. An air compressor manufacturer is only a subordinate group. As a result of years of continuous acquisitions, Atlas can produce almost all forms of air compressors, which is quite prestigious and has the highest market share in the world.

Ingersoll Rand – America

IR is also a multinational group with its headquarters in the United States, and an air compressor manufacturer is just a subordinate group.

IR can also produce various types of air compressors, with a wide range of products and a high reputation. IR’s global market share is second only to or comparable to AC.

Sullair – America

Sullair is a subsidiary company of a large American aviation (military industry) company. It has a short history of producing air compressors, mainly screw compressors.

Sullair has branches all over the world. In the United States, it is an air compressor company second only to IR.

CompAir – UK

Compair is a British company, mainly known in the industry for producing sliding vane air compressors (≤50 HP). In recent years, Compair has successively acquired the screw air compressor department of Demag in Germany and Leroi Air Compressor in the United States to become a global air compressor company.

HITACHI – Japan

Hitachi Industrial Machinery Systems Co., Ltd. specializes in the manufacturing, sales, maintenance, after-sales service and system engineering of industrial machinery products.

It became independent from Hitachi in April 2002. Provide products such as motors, air compressors, inkjet printers, electric hoists, transformers, wind hydraulic machinery, large fan coils, etc., which have always been a leader in the field of industrial motors.

KAESER – Germany

Founded in 1919, it was originally based on processing machinery and has now become Germany’s largest and most successful air compressor manufacturer.

Caesars specializes in processing technology, with more than 3,000 employees in retail production bases located in Coburg, Bavaria, Germany, Gera, Thuringia, and Lyon, France.

KOBELCO – Japan

Kobelco’s compressor business started at the beginning of the last century and has a long history of nearly a hundred years.

Since the production of high-pressure piston machines in 1915, which set a new milestone in the Japanese compressor industry, Kobelco has always accurately grasped the times. Needs, and constantly put forward a variety of new compressor production plans.

Quincy – America

Quincy Compressor of the United States has been committed to the compressed air technology industry since 1920.

Professional manufacturing and sales of the highest quality air compressors and vacuum pumps. Products are widely used in global manufacturing, medical and climate control systems, and in any industry that requires the use of safe and reliable gas sources.

Fusheng – China

Since the establishment of a joint-stock company in 1953, Fusheng has experienced more than half a century of wind and rain, accumulated manufacturing experience, and has high-quality automation equipment.

Fusheng has a complete product line, taking market demand as its mission, and possessing energy-saving and environmentally-friendly qualities.

GESO – UK

British Geso’s products are used in industrial manufacturing, power industry, chemical industry, metallurgical industry, melt-blown cloth industry, laser cutting industry, etc.

The products include a permanent magnet frequency conversion air compressor, a two-stage compression screw air compressor, and a low-pressure screw air compressor. Compressor, laser cutting 16bar air compressor, vacuum pump and air compressor post-processing equipment, etc.

The increasingly popular screw air compressor made in China

As the world’s largest developing country, China has the world’s largest compressed air market.

Through decades of scientific and technological progress and market development, more and more Chinese companies pay more attention to the production and research and development of screw air compressors.

Compared with the top 10 industrial air compressor manufacturers in the world, China’s screw air compressors have the advantages of high cost performance, stable quality, energy-saving, and environmental protection, and are popular in many developing and developed markets.

Best screw air compressor manufacturers in China

Kaishan

Company info: Kaishan group is a professional compressor company with a history of more than 60 years. It is an air compressor manufacturer.

Kaishan Group was formerly a state-owned unit and is also the largest domestic screw air compressor manufacturer in China. Kaishan Group mainly produces drilling, mining equipment and diesel air compressors, etc.

Superiority:

China’s largest air compressor manufacturer.
Many branches around the world.
The main products are diesel air compressors and mining equipment.

Hongwuhuan

Company info: Hongwuhuan Group was founded in 1997. The company started with zero assets. So far, it has become one of the most powerful aerodynamic equipment and engineering tunneling equipment manufacturers in China.

The company currently has six series of more than 200 products, with an annual production capacity of 200,000 sets of general machinery, construction machinery, tunneling machinery, power machinery, and mining equipment.

Sollant

Company info: In the year 2001, the company started its journey by establishing its first venture in Linyi, Shangdong, China.

Sollant has always been an innovator, committed to providing customers with high-quality, high-tech products.

The Sollant group has a new product research and development center, which can develop and manufacture a variety of compressor equipment at high quality and low energy consumption.

They pay more attention to the environmental protection issues involved with the machines and return on consumer investment.

Compared with other brands, the screw air compressor produced by Sollant pays more attention to the product’s cost performance, energy saving, environmental protection and sustainable development.

Superiority:

Low noise and stability of screw compressor.
Excellent R＆Dand production capabilities.
Many agents around the world, good after-sales service.
The product is cost-effective and suitable for most markets in the world.
The largest screw air compressor manufacturer in northern China.

Denair

Company info: Deniar group is a sino-german joint venture listed enterprise and is considered as one of the leading manufacturers of air compressor products in Shanghai, China. Founded in 1998, with over 500 employees.

Superiority:

Focus on the European and American markets.
Many distributors around the world.
Large factory, strong production capacity.
Quite an experience in engineering projects

Conclusion

Nowadays, The top 10 screw air compressor manufacturers in the world are paying more attention to product environmental protection, energy conservation, and sustainable development of the industry. More and more new air compressor manufacturers are also playing an important role in the global market.

Through this article, we hope to give you a more detailed understanding of the global air compressor brands, through this article, we hope to let you know more about the global air compressor brand, so as to help you when you choose the screw air compressor

The post Top 10 Air Compressor Manufacturers in the World appeared first on SOLLANT- Top Manufacturer of Air Compressor, Generator, Drilling Rig in China.

How to Choose an Industrial Air Compressor ?

sollant — Sun, 12 Apr 2020 16:05:18 +0000

When we buy industrial air compressors, have we considered how to match the model is the best? Is it the most energy-efficient? Have we considered the following 9 aspects?

What is the minimum working pressure required for the production line?

We have learned from long-term customer communication that some customers only need 0.6MPa pressure on-site to meet production, but many customers choose an air compressor with a supply pressure of 1.0MPa when purchasing an air compressor.

Every time the pressure increases by 0.1MPa, the energy consumption increases by about 7%. When selecting the air supply pressure of the air compressor, the actual demand pressure on the production site must be considered.

Is the gas demand of the production line stable?

When selecting an industrial air compressor, it is necessary to consider whether the gas consumption of the production line is balanced, whether there are peaks and valleys.

If the air demand of the production line is very stable, it is recommended to choose a power frequency air compressor; if the air demand of the production line is very unstable, it is recommended to choose a permanent magnet variable frequency air compressor.

Are the compressed air pipelines reasonably arranged?

When we select industrial air compressors, we also need to consider whether the compressed air pipeline layout is reasonable. The size of the pipe diameter, the number of turning points and the distance between the air compressor and each gas end pipeline are all factors that affect the pressure loss. It is recommended to enlarge the pipeline diameter appropriately.

If the environmental conditions meet the installation requirements of the air compressor and the working conditions permit it, it can be installed near the gas end.

Can the company’s power facilities meet the needs of air compressors?

Due to the relatively large power equipment of industrial air compressors, when we select the air compressor, we need to consider whether the voltage and capacity of the company can meet the power consumption of the air compressor.

When some companies require a relatively stable voltage and current, we recommend that customers select variable frequency air compressors.

Does the industrial air compressor room meet the conditions?

Large industrial air compressors are not necessarily suitable for production lines. Whether the air compressor room can meet the equipment placement and maintenance space is very important. We recommend that there is at least 1 meter of maintenance space between each piece of equipment.

Whether the air compressor room meets the conditions of air intake and ventilation. If the ventilation is not good, the temperature in the equipment room will be too high, which will affect the efficiency and life of the equipment.

What are the quality requirements of compressed air for air-consuming equipment?

Compressed air contains a certain amount of moisture and oil. If the compressed air is directly put into use without treatment, it may cause failures of the gas consuming equipment and product defects.

When selecting the air compressor, you must carefully understand the terminal gas-consuming equipment of the enterprise. According to actual requirements, provide freeze dryers, adsorption dryers, precision filters and other equipment to process compressed air.

Oil free screw type industrial air compressor or oil-injected air compressor?

Oil-injected screw compressors provide compressed media with varying oil content. Oil free industrial air compressors provide oil-free compression media. Nowadays, oil-injected screw air compressors are basically used in industry. The low cost is one aspect. Not every company has such high requirements for compressed air is the main reason.

Oil-free screw air compressors do not involve oil in the compressed air process, so the compressed air can be oil-free and suitable for high-quality air applications, such as food, biopharmaceuticals, precision spraying and other industries. But oil-free means that there is no oil injection involved in the compression process, not that there is no oil in the air compressor.

The so-called “oil-free” means that the gas does not come into contact with oil at all during the compression process, but the compressor bearings, synchronous gears and other parts still need to be lubricated with lubricating oil, but between these lubrication parts and the compression chamber, An effective shaft seal is used for isolation.

Choose air-cooled or water-cooled?

Generally, air compressors mainly have two cooling methods: air-cooled and water-cooled. Which of the two cooling methods is better or worse depends on the environment in which it is used.

For an environment with sufficient water resources, we recommend choosing a water-cooled type. If water resources are scarce, it is recommended to choose an air-cooled type.

The difference between belt connection and straight connection

Belt connection is to use pulley and belt, motor drive mainframe, its advantage is that it can adjust speed through the proportion of pulley, prevent accidental blocking, burn out the motor, save housing space, the disadvantage is easy to slip, transmission efficiency is low, a direct connection is to connect mainframe and motor through coupling.

The post How to Choose an Industrial Air Compressor ? appeared first on SOLLANT- Top Manufacturer of Air Compressor, Generator, Drilling Rig in China.

Air Compressor Industrial Applications

sollant — Sun, 12 Apr 2020 15:11:22 +0000

Since screw air compressors have been used in industry, they have been very popular. At present, the demand for screw air compressors is gradually increasing. Air compressor application is very extensive, and are almost all used in factories, enterprises, mines, and other industrial fields. The application of rotary compressors is diverse.

Therefore, the requirements for the equipment are also different due to different use occasions. For example, the food and medicine industry generally uses oil-free air compressors, while some special industries require explosion-proof air compressors, so the selection can be based on the company’s own needs to make sure.

A screw air compressor is indispensable gas equipment in the production process of modern enterprises. It is an important gas source for enterprise production. Its application range is wide. The main screw compressor application includes the following:

Glass factory: blowing bottles and glassware, blowing lamps and electronic tubes, combustion gas, the transmission of raw materials, pneumatic control.

Iron and steel plant: deaeration gas, material truck positioning, slag chamber drilling, unloading bag, driving clutch and brake, conveying device, driving lubrication system, driving pneumatic tool, pneumatic pick, grinder, sandblasting, blast furnace discharge, Vacuum degassing.

Refinery: Combustion of gas, emptying and cleaning of oil circuits, lifting and elevators, drive control systems, catalyst recirculation, sandblasting, painting.

Wood and furniture processing: spray cleaning, dip-dye wood, bending and straightening, pneumatic tools, engraving tools, drilling machines, polishing machines, sanding machines, sandblasting, painting, water spraying devices.

Mine: Use air for ventilation, use air to remove water, filter fine chips, drive rock drills, pneumatic drills, blowholes, pile drivers, rock drills

Papermill: air cleaning equipment, lifting and elevator, roll feeding, pressing paper products, driving paper breaker, feeding pneumatic control, removing the waste paper, vacuum drying.

Sheet metal workshop: drive packaging presses, drive platen chuck clutches and positioners, pneumatic tools, finishing hammers, pneumatic picks, drill bits, grinders, cranes and elevators, riveting machines, sandblasting, and spraying.

Plastic manufacturing: casting blanks, inflation of plastic air objects, inflation into a tube shape during extrusion, vacuum or pressure molding, and cylinder operation.

Pharmaceutical manufacturing: stirring liquid, antibiotic fermentation gas, mixing and stirring raw materials, driving centrifuge, pneumatic control, jet powdering, spray drying.

Factory maintenance: air jet cleaning, driving tools (steam hammer, concrete vibrator, drill bit, grinder, crane, paving stone crusher, riveting gun, pipe reel, wrench), sandblasting, spraying metal, spray paint, water spray system.

Aircraft manufacturing: spray washing machines, mold ejection, drive assembly tools, drilling rigs, steam hammers, reamers, riveting guns, screwdrivers, forging hammers, metal forming presses, sandblasting, and painting.

Quarry: Lifting and handling materials, rock drilling rigs, gas supply, drilling and blasting machines, rock drilling rigs, hand drills, water pumps.

Thermal power plant: cleaning pipes, blowing off soot, cleaning boiler and condenser pipes, jet cleaning, conveying pulverized coal, removing sewage, pneumatic control.

Hydropower plant: engine control, ship lock maintenance, drive controller, drive lubrication pump, drive ship lock, start control, cleaning garbage net.

Casting workshop: iron wagon positioning, cleaning equipment, and conveying, driving pneumatic tools, sanding machines, grinders, elevators, pneumatic picks, compactors, steel brushes, sandblasting, sand screening, mud blasting cores.

Cement manufacturing: cement slurry mixing, cement bag cleaning and sealing, raw material mixing, dump truck, cleaning equipment, cement kiln cleaning, pneumatic control.

Chemical plant: aeration and mixing, gas for separation tower, conveying, lifting liquid, spraying, cleaning pipes, pneumatic control, process gas, and conveying liquid.

Food industry: mixing liquid, gas for fermentation tank, cleaning equipment with nozzles, conveying raw materials, food dehydration, filtration.

Automobile manufacturing: spray washing machine, drive assembly tool, pneumatic control, forging workshop, casting workshop, sheet metal workshop.

Beverage factory: bottle washing machine, canning machine, spraying inside wine barrel, gas for the food industry.

The above is the major application of compressors. Because each production process has different requirements for compressed air, when choosing an air compressor, you must choose according to the working conditions of the company to ensure that the selected equipment can meet the company’s production gas requirements.

The post Air Compressor Industrial Applications appeared first on SOLLANT- Top Manufacturer of Air Compressor, Generator, Drilling Rig in China.

How to Choose Air Compressor for Laser Cutting Machine

sollant — Sun, 12 Apr 2020 15:11:20 +0000

Introduction to Laser Cutting Machine

Since the emergence of laser cutting machines, the world’s laser cutter industry has been growing rapidly. More and more sheet metal processing enterprises, kitchen & bathroom manufacturing, automobile parts processing enterprises are using laser cutting machines, especially the sheet metal processing industry. Laser cutting is to replace the traditional mechanical knife with invisible beam, with high precision, fast cutting, not limited to cutting pattern limitation, automatic typesetting saving material, smooth cut, low processing cost, etc. And the air compressor can provide power for the laser cutting machine.

Principle of Laser Cutting Machine

First of all, we introduce the cutting principle of laser cutting: the laser produced by the oscillator passes through the lens and converges at one point to form a very small spot. By accurately controlling the distance between the lens and the plate, the laser spot is stable in a certain position in the direction of material thickness.

The commonly used auxiliary gases are oxygen, nitrogen, and compressed air, argon is sometimes used.

Because of the combustion of oxygen, so cutting thicker carbon plates requires oxygen, the purity requirement is generally 99.5% or higher, but because of oxygen, will produce a clear oxide film at the end of the incision, quenching effect around the cutting surface, have a certain impact on subsequent processing, the end face of the incision is black or dark yellow.

Use nitrogen to cut stainless steel or aluminum plates. The effect is to prevent oxidation and blow off the melt. High purity of nitrogen (especially stainless steel above 8 mm, Requirements to achieve 99.999% purity) pressure requirements are relatively large, general requirement 1 Mpa.

If you want to cut more than 12 mm, or stainless steel as thick as 25 mm, the pressure is higher, 2Mpa above or higher. Will form a protective layer around the metal that cuts the material, the end face of the incision is white.

Argon is the same as nitrogen, as inert gas, It can also prevent oxidation and nitridation in laser cutting. General laser cutting using argon is extremely uneconomical, argon cutting is mainly used in titanium and titanium alloys.

If the auxiliary gas uses compressed air, we know that there is already about 21% oxygen and 78% nitrogen in the air.

In terms of cutting speed, there is no speed of pure oxygen melting cutting, and in terms of cutting quality, there is no pure nitrogen protection of the cutting method effect.

But this can be reversed from a positive point of view: the auxiliary gas uses compressed air to cut faster than nitrogen protection, and the cutting quality is better than oxygen cutting.

Most importantly, compressed air can be supplied directly by a laser air compressor, which is easier to obtain than oxygen, nitrogen, argon.

If you buy an air compressor system —— laser cutter air compressor, the initial investment will be higher. But with a simple accounting, it is easy to conclude that long-term laser cutting machines are used for processing, if not for speed, or for high-quality requirements, auxiliary gases for laser cutting machines.

Using compressed air is very cost-effective, and compressed air can also be used as a cylinder power source and optical path positive pressure dust removal, and there is no risk of gas leakage.

If the auxiliary gas uses compressed air, we know that there is already about 21% oxygen and 78% nitrogen in the air.

In terms of cutting speed, there is no speed of pure oxygen melting cutting, and in terms of cutting quality, there is no pure nitrogen protection of the cutting method effect.

But this can be reversed from a positive point of view: the auxiliary gas uses compressed air to cut faster than nitrogen protection, and the cutting quality is better than oxygen cutting.

Most importantly, compressed air can be supplied directly by air compressor, which is easier to obtain than oxygen, nitrogen, argon.

If you buy an air compressor for laser cutting machine, the initial investment will be higher. But with a simple accounting, it is easy to conclude that long-term laser cutting machines are used for processing, if not for speed, or for high-quality requirements, auxiliary gases for laser cutting machines. Using a laser cutter air compressor is very cost-effective, and compressed air can also be used as a cylinder power source and optical path positive pressure dust removal, and there is no risk of gas leakage.

How to Choose the Air Compressor for Fiber Laser

When it comes to laser cutter air compressors, many laser cutting users may have questions about how to choose the type of air compressor to match the laser cutting machines correctly.

Generally from the exhaust volume, we should choose a larger air compressor than the actual use, but do not blindly pursue the air volume, if the air compressor exhaust volume is too large, much larger than the actual demand, even if the air compressor has frequency conversion regulation, It may cause air compressor to run at the lowest frequency.

In order to maintain the stability of gas supply pressure, once the gas continues, the air compressor has to start operation. Such frequent “start-working-dormancy-start-working-dormancy “, easy to cause bubbles and emulsification of lubricating oil in oil and gas separator, which will shorten the life of air compressor and increase the oil content of exhaust port.

In terms of pressure, when the laser power is large enough, the higher the pressure, the better the cutting quality and the higher the cutting efficiency. But if the laser power is not large enough, no matter how high the pressure will not help, after all, the laser power is large enough to melt the cutting material faster.

Also most importantly, the quality of compressed air has a very direct effect on the quality of laser cutting. The compressed air contains water mist and oil. If it is not treated clean, high pressure spray onto the protective mirror of the laser cutting head.

A superpower laser cutting machine may also burn out the laser head. At present in the industry, laser cutting machines launched special products. Usually, the micro-oil twin-screw and post-processing equipment are combined to form a complete air source system, which we call a four-in-one laser cutting air compressor.

According to some commonly used configuration, we take carbon steel as an example, roughly statistics the standard of selecting a special air compressor for laser cutting machine:

Note:

Specific selection should be based on cutting materials and thickness, for more information, please visit our website：www.shanghaisollant.com

The post How to Choose Air Compressor for Laser Cutting Machine appeared first on SOLLANT- Top Manufacturer of Air Compressor, Generator, Drilling Rig in China.

Fixed Speed VS Variable Speed Compressor

sollant — Sun, 12 Apr 2020 15:11:19 +0000

What are the working principles of fixed speed and variable speed compressors?

Power frequency air compressors are also called fixed speed air compressors. In any case, as long as the air compressor is started, the speed will always be constant.

The motor uses a 3-phase asynchronous motor. The motor speed of different powers is generally in the range of 2930-2970 ( 380v50hz).

The variable speed(VSD) air compressor uses a 3-phase permanent magnet synchronous motor, which is used in conjunction with a frequency inverter to adjust the motor speed according to the pressure feedback signal to achieve the purpose of energy-saving.

What is the difference between fixed speed vs variable speed compressor?

Working Pressure:

The variable speed(VSD) air compressor uses the step-less speed regulation characteristics of the frequency converter, and can start smoothly through the PID regulator inside the frequency converter; it can quickly adjust the response to the working environment with relatively large fluctuations in air consumption;
Air pressure stability is much better than a fixed-speed air compressor.

Machine Start:

The frequency converter of the air compressor has the function of a soft starter. The maximum starting current is within 1.2 times the rated current, and the starting impact is small. The starting current of a power frequency air compressor is generally more than 6 times the rated current.
The start-up impact of variable frequency air compressors is much smaller than that of industrial frequency air compressors.

Air Flow Control：

The air compressor is driven by fixed speed can only work at one displacement. The variable speed air compressor can work in a wide range of displacement. The frequency converter adjusts the motor speed in real-time according to the actual air consumption to control the air displacement.
When the air consumption is low, the variable inverter can be automatically dormant, which greatly reduces the energy loss.
The optimized control strategy can further improve the energy-saving effect.

The Voltage Adaptability of AC Power:

Due to the over-modulation technology adopted by the inverter, sufficient torque can be output to drive the electric motor even when the AC power supply voltage is slightly lower. When the voltage is slightly higher, the voltage output to the motor will not be higher;
For the occasion of self-generation, the variable frequency drive can show its advantages better;
According to the characteristics of the motor’s VF (variable speed air compressors work below the rated voltage in an energy-saving state), the effect is obvious for sites with the low grid voltage.

Machine Noise：

Most of the working conditions of the frequency conversion system are lower than the rated speed, the noise and wear of the main engine are reduced, and the noise is lower than that of the fixed speed system.

Price:

Because the fixed speed air compressor does not have a frequency converter, the production cost and price are usually cheaper than the variable speed air compressor.

Let Us See More Simple and Clear:

Variable Speed Feature

Energy-saving, reduce production energy consumption
Extend the service life of the machine
Stable airflow, suitable for intermittent operation
Air compressor unit runs more quietly
Automatically adjust the motor speed

Fixed Speed Feature

Low machine cost
Motor speed is not adjustable
Airflow always maintains the same standard
Under the same requirements, it is suitable for 7*24 hours of uninterrupted operation

Do I Need a Fixed Speed or Variable Speed Compressor?

Choose a Fixed Speed Drive for This Condition:

The fixed speed mainly relies on two points to control the start and stop (high-pressure stop, low-pressure start).

If there is no high requirement on the air pressure used, and the selected air compressor produces air volume close to the required air volume, it is the remaining amount. When the volume is not large, it is recommended to use the power frequency.

At this time, regardless of the power frequency conversion air compressor, in order to ensure the air volume demand, it will basically run at full load.

At this time, the power frequency conversion consumption is the same, and the frequency conversion air compressor is still more With the addition of a frequency converter, there is an additional component that can be easily damaged and repaired, and the power saved in long-term use is negligible.

In some cases, VSD is the correct solution. If your power supply costs are high, the compressor runs for many hours a day, and your needs vary greatly, then VSD makes sense.

Finally, VSD needs a clean, dry installation area and a good power supply.

Therefore, the frequency conversion air compressor is not necessarily the best choice. You must choose the appropriate air compressor according to your own use situation and the characteristics of the air you use.

The post Fixed Speed VS Variable Speed Compressor appeared first on SOLLANT- Top Manufacturer of Air Compressor, Generator, Drilling Rig in China.

Screw Compressor VS Piston Compressor

sollant — Sun, 12 Apr 2020 12:55:03 +0000

Which Is Better? —Screw Compressor VS Piston Compressor

Screw air compressors and piston air compressors are the two most common models in the air compressor market. Practitioners of air compressors often use these two models as a comparison to advertise and promote to users.

Piston air compressors entered the market early and had a large market share; screw air compressors entered the market late, but with a high degree of intelligence.

However, it is a trend that screw air compressors replace piston air compressors, and it has been steadily proceeding. In the near future, more screw air compressors will be used in industrial production, and the market share of screw air compressors will continue to increase.

Comparison of rotary screw air compressor vs piston selection compressed air has played a vital role in the daily operations of most companies. The demand for compressors is obvious, but which compressor to choose?

The screw-type or the piston type can make it work best in the equipment, which is a question worth discussing. This first needs to consider the similarities and differences between the two compressors before choosing the most suitable one.

Compressors have been widely used in various gas fields, but air compression is the most widely used part. At present, stationary screw air compressors account for approximately 40% of the air compression market share, while piston air compressors account for 21% of the market share (calculated in US dollars).

What is the difference between rotary and piston compressor？

Different structure

The organization structure of the screw air compressor consists of the oil screw main engine, electric motor, oil and gas separator, oil pipeline system, cooling system, gas pipeline system, and electrical control system.

The piston compressor is composed of a compressor main unit, cooling system, regulating system, lubrication system, safety valve, electric motor, and control equipment.

Different features

The screw air compressor has the advantages of low vibration, no need to fix on the foundation with anchor bolts, low motor power, low noise, high efficiency, stable exhaust, and no wearing parts.

Under normal circumstances, the compressed gas of the piston compressor does not contain oil, and there is no need to add a degreasing device.

The disadvantage of this machine is that the motor power is too large, the exhaust pressure is not stable enough, the exhaust temperature is high, the noise is too large, the maintenance workload is large, and the maintenance cost is high.

The fault is different

Screw air compressor failure is very few, just regular maintenance, replacement of air filter, oil filter and oil-gas separator, can be normal operation.

Due to incomplete oil scraping and poor sealing of piston air compressor, oil often runs to packing device or even piston ring, resulting in oil in compressed gas.

In addition, the exhaust temperature is high, sometimes as high as 200 ℃; the cooling effect is not good due to the blockage of cooling; the piston ring is stained with oil, which is especially easy to wear; the valve flap leaks; the cylinder is worn, etc.

Which is better rotary or piston compressor？

4.Performance Comparison:

Reliability

Piston air compressors have low reliability, many parts, many vulnerable parts, large maintenance, poor operation reliability, short life span, and the interval between overhauls is generally about 8,000 hours.

The screw air compressor has high reliability, few parts, no wearing parts, small maintenance, reliable operation, long life, and the interval between overhauls can reach 40,000 to 80,000 hours.

Dynamic Balance

Piston type has unbalanced inertial force, machine running vibration and noise are big, small machine or above needs to install the foundation.

The screw type has no unbalanced inertial force, the machine can work steadily and at a high speed, is small in size, light in weight, and can achieve basic operation.

Pressure Stability

The reciprocating air compressor has a discontinuous exhaust, causing airflow pulsation, unstable pressure, and easy to cause pipeline vibration. A large-capacity air tank is required.

The rotary screw air compressor has a uniform exhaust, no airflow pulsation, stable pressure, and no need for large-capacity air tanks.

Air Quality

Reciprocating air compressors have poor air quality and high exhaust oil content, which cannot meet the higher requirements of users, and post-processing costs are high.

The oil-injected screw compressor can also achieve good air quality, and the exhaust oil content is only between 1-5 ppm, which meets the higher requirements of users and reduces post-processing costs.

Price-Piston VS Screw Air Compressor

Piston-type air compressors have low production requirements and low prices. Screw-type air compressors require high production technology, and their prices are more expensive than piston-type air compressors.

Stress Adaptability

Piston air compressors are suitable for a wide range of pressures and can reach the required pressure regardless of the flow rate, up to 350Mpa in industry.

The oil-injected screw air compressor is limited by the rigidity of the rotor and the bearing, so it cannot be used in high-pressure occasions, and the exhaust pressure generally does not exceed 3 Mpa.

Capacity Adaptability

The piston type has strong adaptability and a wide range of displacement, which is not affected by pressure.

Rotary compressors cannot be applied to miniature occasions because they rely on gap sealing gas. Generally, rotary compressors have superior performance only when the volumetric flow is greater than 0.2m3/min.

Operation and Maintenance

The piston air compressor has a low degree of automation and must be operated by someone on duty. The screw air compressor has a high degree of automation. The operator does not need to undergo long professional training and can realize unattended operation.

Conclusion:

Based on the above, if you consider the price, the piston air compressor is the best choice; in order to reduce the maintenance cost and production cost of the air compressor, increase economic benefits, facilitate equipment management, protect the environment and reduce pollution.

And use high-efficiency high-reliability screw compressors to replace piston-type air compressors and the construction of an advanced and economical air compressor station is an inevitable trend of increasing development and strength.

The post Screw Compressor VS Piston Compressor appeared first on SOLLANT- Top Manufacturer of Air Compressor, Generator, Drilling Rig in China.

Application of Air Compressor in Iron and Steel Industry

sollant — Fri, 06 Mar 2020 15:11:21 +0000

The iron and steel industry refers to the industry that produces pig iron, steel, steel, industrial pure iron and ferroalloys, and is one of the basic industries in all industrialized countries in the world. Economists usually regard steel output or per capita steel output as an important indicator of various countries’ economic strength.

The steel industry is one of the pillar industries of a country. It belongs to heavy industry, and the scale of these enterprises is very large, usually with tens of thousands or hundreds of thousands of people. The construction of a steel company usually takes years or even decades.

The equipment adopted by the new iron and steel enterprises is the most advanced, while the equipment of some old iron and steel enterprises needs to be modified to improve the production efficiency of the enterprises and make the old enterprises glow with new vitality. In this process, the compressor is inseparable everywhere.

A large iron and steel enterprise generally starts from the ore entering the plant to smelting shaped steel ingots and iron ingots, or further processing into steel plates, steel wires, or other shaped steels.

As a typical large-scale industrial enterprise with high energy consumption, iron and steel enterprises account for a large proportion of all energy consumption (approximately 5%-15% of total energy consumption). In steel companies, compressed air is widely used as an energy medium.

The use of compressed air in steel companies is included in all production processes. Its main uses can be divided into sintering pneumatic conveying, blast furnace injection, continuous casting steam spray cooling, bottom blowing of the converter, surface blowing of steel belt, various pneumatic instrument valves, air motors, pulse bag filters, etc.

In the iron and steel production process, the ore is first sintered, and then the sintered iron ore is transported to the kerosene iron blast furnace to be smelted into molten iron and cast into iron ingots.

To make steel ingots, the iron ingots must be sent to the steelmaking blast furnace for re-smelting, changing from iron to steel. If you want to obtain other alloy steels, you must add appropriate elements in the smelting process to make different types of alloy steels.

A large iron and steel enterprise has many sintering workshops (or plants), iron-making blast furnaces, steel-making plants, etc., and they are widely distributed. Therefore, many air compressor stations are set up in general iron and steel enterprises to meet the gas demand of various gas points.

On the one hand, each air compressor station is relatively independent and easy to manage; on the other hand, it can meet the needs of different compressed air quality.

General steel enterprise air compressor station configuration:

The types of air compressors used by iron and steel enterprises generally include centrifugal and screw compressors. At present, piston air compressors have been basically eliminated.

The centrifuge air compressor station is generally equipped with 2-9 centrifuges, usually with a displacement of 100-300m³/min. According to production needs, it is generally set below 1.3Mpa, of which 0.38MPa and 0.5Mpa are used for steelmaking and continuous casting, 0.8 MPa is for power/instrument use, and 1.3Mpa is for coal injection blast furnace.

The screw compressor air compressor station is generally equipped with 2-8 screw compressors, most of which have an air displacement of less than 10-40m³/min. The screw air compressor is mainly used as an auxiliary air source for the centrifugal air compressor.

Uses and characteristics of compressed air in iron and steel enterprises:

The distribution of compressed air in the ironmaking equipment of iron and steel enterprises is mainly in the sintering zone, raw material zone, coke oven zone, and blast furnace zone.

The compressed air in the steelmaking equipment of iron and steel enterprises is mainly used for continuous casting, converter pneumatic and purging, and aerosol cooling for continuous casting.

The hot rolling mill’s compressed air is mainly used for rolling mill and furnace pneumatic equipment and cold rolling purging. Used for strip steel cleaning, pickling, continuous winding, pneumatic equipment and hot-dip galvanizing equipment.

A large amount of compressed air is also required for the injection of coal ash required for ironmaking blast furnace and blast furnace combustion.

For example, a 2500m³ ironmaking blast furnace usually requires 4 40m³/min screw air compressors, of which 3 are normally open and one is used as a standby machine.

The blast furnace’s blowing equipment generally selects a high-pressure fan, usually with a pressure of 0.2 MPa. The amount of compressed air used for conveying coal to the blast furnace.

The quality requirements of compressed air for iron and steel enterprises:

The quality of compressed air demanded by iron and steel enterprises is usually not too high. Except for some of the compressed air used in instruments that require refrigerating dryers, most of them do not need to be processed too precisely.

The post Application of Air Compressor in Iron and Steel Industry appeared first on SOLLANT- Top Manufacturer of Air Compressor, Generator, Drilling Rig in China.