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China Frequency Conversion Mini Portable Screw Air Compressor Machines with Pump mini air compressor

Merchandise Description

Introduction of Frequency Conversion Mini Portable Screw Air Compressor Machines With Pump

Feature 1: Environmental protection Accurate evaluation of the inside airflow of the device and appropriate use of the muffler board. The assembly of each element is managed throughout the ultimate assembly procedure to ensure low noise in the course of operation. Even if the equipment is put near the function site or office, it will not result in not comfortable reactions to the human entire body.Characteristic 2: Simple maintenance zmjt055Reasonable layout, humanized design and style, mature designs. No matter whether it is program upkeep or troubleshooting, it is effortless to navigate.Function a few:When the rated pressure set by the equipment is arrived at, the compressor is unloaded. When the system pressure is reduced than the set benefit, the equipment will quickly reload, and according to the genuine gas use, intelligently decide on the proper automatic cease time right after unloading to save vitality, and guarantee that when the technique strain is reduce than the established benefit right after shutdown The equipment restarts instantly. Do not begin up to more than hourly. The screw major device sucks air in the lower temperature zone to increase compression efficiency and reduce energy use.The solution has been exported to the United States, France, Canada, Indonesia, Russia, Vietnam, Australia, South Korea, Iran and other international locations, and has gained unanimous praise from consumers.zmwm02

Parameter of Frequency Conversion Mini Portable Screw Air Compressor Devices With Pump

 

Design Exhaust
pressure
(Mpa)
Exhaust
quantity
(m³/min)
Electrical power
(kw)
Sound
(db)
Fat
(kg)
Dimension
(mm)
Frequency converter
 weight(kg)
Frequency converter
 size(mm)
BK7.5-8G .8 1.two 7.5 72 200 800*620*800 two hundred 800*620*800
BK7.5-8 .8 one.two 720*seven-hundred*a thousand two hundred
BK7.5-10 1 one two hundred
BK7.5-13 1.3 .8 200
BK11-8G .8 one.7 11 72 300 1000*760*1090 300 a thousand*780*1090
BK11-eight .eight 1.7 290 700*670*1250 three hundred 805*720*1250
BK11-ten one one.5 three hundred
BK11-thirteen 1.3 1.2 three hundred
BK15G .eight 2.four 15 73 280 a thousand*670*1090 three hundred 1000*780*1090
BK15-eight .8 2.4 290 700*670*1250 300 805*720*1250
BK15-10 one two.two 300
BK15-13 1.3 one.seven 300
BK18-eight .eight 3 18.five 74 500 1080*880*1235 560 1080*970*1235
BK18-10 1 two.7 560
BK18-thirteen 1.3 two.3 560
BK22-8G .eight 3.six 22 74 380 1200*800*1100 390 1200*800*1100
BK22-eight .eight three.six 540 1080*880*1235 600 1080*970*1235
BK22-10 one three.two 600
BK22-13 one.three 2.seven 600
BK30-8 .eight five 30 75 650 1120*930*1290 740 1120*1571*1290
BK30-10 one four.4 740
BK30-thirteen one.3 three.6 740
BK37-8G .8 6 37 76 570 1340*850*1310 820 1340*850*1310
BK37-eight .8 six 730 1240*1030*1435 690 1240*1070*1435
BK37-10 1 5.five 690
BK37-13 one.3 4.six 690
BK45-8G .8 seven.1 45 78 800 1480*1030*1345 1030 1480*1030*1345
BK45-8 .eight 7.1 820 1240*1030*1595 880 1240*1095*1595
BK45-10 1 6.five 880
BK45-13 one.3 five.6 880
BK55-8G .8 ten 55 80 800 1480*1030*1345 810 1480*1030*1345
BK55-8 .8 nine.5 1200 1545*1200*1470 1270 1845*1200*1465
BK55-ten one 8.five 1270
BK55-13 one.three 7.four 1270
BK75-eight .8 thirteen 75 eighty one 1470 1800*1190*1710 1470 1800*1190*1710
BK90-8 .8 16 90 eighty one 1520 1600
BK110&WH-eight .8 21 110 82 2000 2100*1230*1730 2150 2600*1310*1800
BK110-eight .eight 21 2150
BK132&WH-eight .8 24 132 82 2100 2270
BK132-8 .eight 24 2270

 

Photos of Frequency Conversion Mini Transportable Screw Air Compressor Devices With Pump

 

US $1,500
/ Piece
|
1 Piece

(Min. Order)

###

Shipping Cost:

Estimated freight per unit.



To be negotiated

###

After-sales Service: Online
Warranty: 1 Year
Lubrication Style: Lubricated

###

Customization:

###

Model Exhaust
pressure
(Mpa)
Exhaust
volume
(m³/min)
Power
(kw)
Noise
(db)
Weight
(kg)
Dimension
(mm)
Frequency converter
 weight(kg)
Frequency converter
 size(mm)
BK7.5-8G 0.8 1.2 7.5 72 200 800*620*800 200 800*620*800
BK7.5-8 0.8 1.2 720*700*1000 200
BK7.5-10 1 1 200
BK7.5-13 1.3 0.8 200
BK11-8G 0.8 1.7 11 72 300 1000*760*1090 300 1000*780*1090
BK11-8 0.8 1.7 290 700*670*1250 300 805*720*1250
BK11-10 1 1.5 300
BK11-13 1.3 1.2 300
BK15G 0.8 2.4 15 73 280 1000*670*1090 300 1000*780*1090
BK15-8 0.8 2.4 290 700*670*1250 300 805*720*1250
BK15-10 1 2.2 300
BK15-13 1.3 1.7 300
BK18-8 0.8 3 18.5 74 500 1080*880*1235 560 1080*970*1235
BK18-10 1 2.7 560
BK18-13 1.3 2.3 560
BK22-8G 0.8 3.6 22 74 380 1200*800*1100 390 1200*800*1100
BK22-8 0.8 3.6 540 1080*880*1235 600 1080*970*1235
BK22-10 1 3.2 600
BK22-13 1.3 2.7 600
BK30-8 0.8 5 30 75 650 1120*930*1290 740 1120*1020*1290
BK30-10 1 4.4 740
BK30-13 1.3 3.6 740
BK37-8G 0.8 6 37 76 570 1340*850*1310 820 1340*850*1310
BK37-8 0.8 6 730 1240*1030*1435 690 1240*1070*1435
BK37-10 1 5.5 690
BK37-13 1.3 4.6 690
BK45-8G 0.8 7.1 45 78 800 1480*1030*1345 1030 1480*1030*1345
BK45-8 0.8 7.1 820 1240*1030*1595 880 1240*1095*1595
BK45-10 1 6.5 880
BK45-13 1.3 5.6 880
BK55-8G 0.8 10 55 80 800 1480*1030*1345 810 1480*1030*1345
BK55-8 0.8 9.5 1200 1545*1200*1470 1270 1845*1200*1465
BK55-10 1 8.5 1270
BK55-13 1.3 7.4 1270
BK75-8 0.8 13 75 81 1470 1800*1190*1710 1470 1800*1190*1710
BK90-8 0.8 16 90 81 1520 1600
BK110&WH-8 0.8 21 110 82 2000 2100*1230*1730 2150 2600*1310*1800
BK110-8 0.8 21 2150
BK132&WH-8 0.8 24 132 82 2100 2270
BK132-8 0.8 24 2270
US $1,500
/ Piece
|
1 Piece

(Min. Order)

###

Shipping Cost:

Estimated freight per unit.



To be negotiated

###

After-sales Service: Online
Warranty: 1 Year
Lubrication Style: Lubricated

###

Customization:

###

Model Exhaust
pressure
(Mpa)
Exhaust
volume
(m³/min)
Power
(kw)
Noise
(db)
Weight
(kg)
Dimension
(mm)
Frequency converter
 weight(kg)
Frequency converter
 size(mm)
BK7.5-8G 0.8 1.2 7.5 72 200 800*620*800 200 800*620*800
BK7.5-8 0.8 1.2 720*700*1000 200
BK7.5-10 1 1 200
BK7.5-13 1.3 0.8 200
BK11-8G 0.8 1.7 11 72 300 1000*760*1090 300 1000*780*1090
BK11-8 0.8 1.7 290 700*670*1250 300 805*720*1250
BK11-10 1 1.5 300
BK11-13 1.3 1.2 300
BK15G 0.8 2.4 15 73 280 1000*670*1090 300 1000*780*1090
BK15-8 0.8 2.4 290 700*670*1250 300 805*720*1250
BK15-10 1 2.2 300
BK15-13 1.3 1.7 300
BK18-8 0.8 3 18.5 74 500 1080*880*1235 560 1080*970*1235
BK18-10 1 2.7 560
BK18-13 1.3 2.3 560
BK22-8G 0.8 3.6 22 74 380 1200*800*1100 390 1200*800*1100
BK22-8 0.8 3.6 540 1080*880*1235 600 1080*970*1235
BK22-10 1 3.2 600
BK22-13 1.3 2.7 600
BK30-8 0.8 5 30 75 650 1120*930*1290 740 1120*1020*1290
BK30-10 1 4.4 740
BK30-13 1.3 3.6 740
BK37-8G 0.8 6 37 76 570 1340*850*1310 820 1340*850*1310
BK37-8 0.8 6 730 1240*1030*1435 690 1240*1070*1435
BK37-10 1 5.5 690
BK37-13 1.3 4.6 690
BK45-8G 0.8 7.1 45 78 800 1480*1030*1345 1030 1480*1030*1345
BK45-8 0.8 7.1 820 1240*1030*1595 880 1240*1095*1595
BK45-10 1 6.5 880
BK45-13 1.3 5.6 880
BK55-8G 0.8 10 55 80 800 1480*1030*1345 810 1480*1030*1345
BK55-8 0.8 9.5 1200 1545*1200*1470 1270 1845*1200*1465
BK55-10 1 8.5 1270
BK55-13 1.3 7.4 1270
BK75-8 0.8 13 75 81 1470 1800*1190*1710 1470 1800*1190*1710
BK90-8 0.8 16 90 81 1520 1600
BK110&WH-8 0.8 21 110 82 2000 2100*1230*1730 2150 2600*1310*1800
BK110-8 0.8 21 2150
BK132&WH-8 0.8 24 132 82 2100 2270
BK132-8 0.8 24 2270

The Air Compressor Is a Versatile Tool

The Air Compressor is one of the most versatile tools in any garage or workshop. It is easy to use and can perform a variety of tasks, from jackhammering to drilling. These machines are available in a wide variety of sizes and types, making it an excellent choice for a variety of situations. With a single motor, you no longer need separate motors for each tool. Its lightweight, compact design makes it easy to handle, and the single motor also reduces wear on parts.
air-compressor

Oil-injected

Oil-injected air compressors require a large amount of lubricant, which needs to be added to the sump regularly to maintain optimum performance. As there are many types of industrial fluids, a well-intentioned maintenance technician may add the wrong lubricant to the compressor. If this happens, the compressor will become incompatible with the lubricant, resulting in excessive carryover and the need to flush and replace downstream air treatment components.
Typically, the G 110-250 oil-injected rotary screw compressor from Atlas Copco provides reliable compressed air, preventing costly downtime. The G110-250 oil-injected rotary screw compressor is highly reliable and durable, enabling it to function in temperatures up to 46degC/115degF. Despite the oil-injected air compressor’s robust design, this unit requires very little on-site installation, and it features simple operation.
The primary advantage of oil-injected air compressors is the reduced cost of running. The cost of oil-free compressors is less than half of that of oil-injected ones, and it will require fewer maintenance costs in the long run. Moreover, the oil-free system is more environmentally friendly than oil-injected air compressors. But the drawbacks of oil-injected air compressors are substantial, too. It can contaminate finished goods and cause a significant financial risk for the manufacturer.
An oil-injected rotary screw air compressor offers several advantages over its counterpart. First, it features an innovative vertical design with variable-speed drive, allowing it to run more efficiently. Second, oil-injected air compressors reduce energy consumption by up to 50% compared to non-oil-injected air compressors. They also have a thermostatic valve, allowing them to maintain an optimum temperature. Thermostatically-regulated oil coolers allow the compressor to run more quietly.

Oil-free

What is an oil-free air compressor? The name refers to a type of air compressor that does not contain oil in the compressor chamber. Oil-free air compressors still use oil for various purposes, including lubricating the moving parts and managing waste heat. However, many people do not realize that their air compressor still requires oil for proper functioning. This article will explore why this type of air compressor is preferable for many users.
First of all, oil-free air technology has many benefits. For one, it reduces the energy cost involved in filtering air, and it minimizes leaks. Moreover, it also reduces the oil costs associated with compressor refills. And finally, it reduces the risks of contamination. Oil-free air technology is the future of compressed air. If you’re looking for an oil-free air compressor, here’s what to look for in your search.
Depending on the purpose of your air compressor, it may be beneficial to invest in an oil-free air compressor. Oil-lubricated air compressors are generally more durable than their oil-free counterparts, but they may cost twice as much. You should still consider the cost of ownership before purchasing an oil-free compressor. The oil-free models can be easier to transport, and they are more powerful. Moreover, they’re quieter than oil-lubed models.
An oil-free air compressor also means less maintenance, as it doesn’t need oil to work. This type of air compressors also features fewer moving parts, which means fewer places for problems to develop. All oil-free air compressors are manufactured to meet ISO Class 0 and 1 air purity standards. They also have less noise and vibration compared to their oil-based counterparts. So, why not choose an oil-free air compressor for your business?
air-compressor

Gasoline

When choosing a gas-powered air compressor, it’s important to consider the advantages of gasoline. This energy source can power a large air compressor without electricity. However, this type of air compressor lacks electrical hookup, so you’ll need to run an extension cord if you need to use it at a distance. However, gas compressors are able to function with just a gas tank. This makes them ideal for medium to heavy-duty industrial applications.
Another important consideration when choosing a gas air compressor is its size. Larger compressors are typically larger than portable ones and require more space. This makes them easier to transport and operate on the go. However, if you’re not sure which type of air compressor is best for you, consider the gas-powered versions. While they may be lighter, they don’t run as smoothly as their electric counterparts. Gasoline-powered compressors are not as portable as their electric counterparts and require proper maintenance.

Electricity

Electricity in an air compressor is not cheap. A 25 HP air compressor runs for ten hours each day, five days a week. The motor in these machines consumes 746 watts per hour. To find out how much electricity the equipment uses, multiply the wattage by the running time. For example, if the compressor runs for three hours, then it will use 1.9 kilowatt hours of electricity. To determine how much electricity an air compressor uses per day, you can calculate the kilowatt hours and multiply the number by the utility rate. Considering this, you can determine the cost of running your air compressor once per month.
The cost of operating an air compressor depends on the type of compressor. Electric air compressors are often silent and can run without any maintenance. These tools can be left unattended for up to four thousand hours before requiring repair. Electric air compressors require higher power for higher pressure, so you should plan accordingly. Whether or not you need a maintenance visit is up to you, but the benefit of not having to spend a fortune on repairs is priceless.
Although compressed air is not an energy-efficient source, its use in a variety of applications may save you money and kilowatts. Since an air compressor uses power when it is running, the cost is lower than the cost of operating a power tool. If you plan to use your air compressor for a long time, make sure that it is maintained properly. Proper care will save you money and power, and you may even be able to get an extended warranty if the compressor breaks down.
air-compressor

Variable frequency drive

The main purpose of a variable frequency drive (VFD) in an air compressor is to reduce energy consumption in the process of compression. A single motor drag system cannot adjust its speed continuously according to the weight of the load. By applying frequency control to the compressor, the power consumption can be reduced while maintaining the same pressure level. Therefore, a VFD is an excellent choice for compressors. Its benefits are numerous.
A VFD can also monitor the temperature of the motor and send error signals if the motor is running too hot or too cold. This eliminates the need for a separate sensor to monitor the oil pressure. These functions are useful not only in lowering energy consumption, but also in improving the performance of an application. Moreover, a VFD can monitor additional variables such as temperature and motor speed. Hence, it is a useful investment.
When using a VFD, it is crucial to choose the right motor. The speed of the compressor should be within the maximum starting limit of the motor. The air tank may be of any size, but a constant pressure limit is required to keep the VFD running within the service factor of the motor. In addition to a VFD, a master controller should also include a remote pressure set point and a PID card for a master controller. The transmitter should incorporate all useful data from the VFD, including the speed and the oil temperature. The VFD must be tested before it is integrated with the master control. It should be tested for min and max speed, temperature, and current within the expected range.
The use of a VFD in an air compressor has many benefits. One of the most notable is the reduction in power consumption. Fixed-speed compressors run on set points of six to seven bar. An extra bar of compression uses 7 percent of energy. This energy is wasted. A VFD-powered air compressor can also increase the life span of compressor parts. It is one of the best investments in your compressor. So, why wait any longer?

China Frequency Conversion Mini Portable Screw Air Compressor Machines with Pump     mini air compressorChina Frequency Conversion Mini Portable Screw Air Compressor Machines with Pump     mini air compressor
editor by czh 2023-01-28

China Good quality 5HP-10HP Single Phase Permanent Magnet Frequency Conversion Rotary Screw Air Compressor for Industrial Use with Hot selling

Solution Description

Our organization delivers range of products which can satisfy your multifarious calls for. We adhere to the management principles of “high quality very first, consumer 1st and credit-based mostly” considering that the institution of the company and constantly do our ideal to fulfill prospective demands of our customers. Our business is sincerely prepared to cooperate with enterprises from all in excess of the globe in buy to recognize a CZPT scenario because the craze of financial globalization has produced with anirresistible force.

The Air Compressor Is a Functional Resource

The Air Compressor is 1 of the most adaptable resources in any garage or workshop. It is straightforward to use and can carry out a assortment of duties, from jackhammering to drilling. These devices are accessible in a extensive assortment of sizes and varieties, creating it an exceptional selection for a selection of situations. With a one motor, you no more time need separate motors for every device. Its light-weight, compact layout can make it simple to take care of, and the one motor also minimizes dress in on components.
air-compressor

Oil-injected

Oil-injected air compressors call for a big amount of lubricant, which demands to be included to the sump routinely to sustain optimum efficiency. As there are many varieties of industrial fluids, a properly-intentioned routine maintenance technician might incorporate the mistaken lubricant to the compressor. If this transpires, the compressor will turn into incompatible with the lubricant, resulting in extreme carryover and the need to have to flush and replace downstream air remedy components.
Generally, the G one hundred ten-250 oil-injected rotary screw compressor from Atlas Copco provides reputable compressed air, avoiding expensive downtime. The G110-250 oil-injected rotary screw compressor is very reputable and tough, enabling it to perform in temperatures up to 46degC/115degF. Regardless of the oil-injected air compressor’s strong design, this unit needs quite minor on-site set up, and it characteristics basic operation.
The principal advantage of oil-injected air compressors is the decreased cost of working. The cost of oil-totally free compressors is less than 50 percent of that of oil-injected ones, and it will require much less servicing costs in the long operate. Moreover, the oil-free of charge method is far more environmentally pleasant than oil-injected air compressors. But the negatives of oil-injected air compressors are substantial, as well. It can contaminate concluded goods and trigger a considerable monetary threat for the producer.
An oil-injected rotary screw air compressor delivers many positive aspects over its counterpart. 1st, it features an modern vertical style with variable-pace drive, permitting it to run far more efficiently. 2nd, oil-injected air compressors minimize strength consumption by up to fifty% when compared to non-oil-injected air compressors. They also have a thermostatic valve, permitting them to maintain an the best possible temperature. Thermostatically-regulated oil coolers allow the compressor to run far more quietly.

Oil-cost-free

What is an oil-free of charge air compressor? The name refers to a variety of air compressor that does not have oil in the compressor chamber. Oil-free of charge air compressors nonetheless use oil for various needs, like lubricating the shifting elements and handling squander heat. However, a lot of individuals do not recognize that their air compressor even now needs oil for suitable functioning. This article will investigate why this kind of air compressor is preferable for several customers.
Very first of all, oil-free of charge air technological innovation has numerous advantages. For one, it decreases the vitality price included in filtering air, and it minimizes leaks. Additionally, it also minimizes the oil costs linked with compressor refills. And ultimately, it reduces the dangers of contamination. Oil-free of charge air technology is the potential of compressed air. If you might be looking for an oil-totally free air compressor, this is what to appear for in your look for.
Dependent on the goal of your air compressor, it might be advantageous to invest in an oil-cost-free air compressor. Oil-lubricated air compressors are usually much more sturdy than their oil-free counterparts, but they may possibly expense two times as a lot. You should still consider the cost of ownership prior to acquiring an oil-free compressor. The oil-free versions can be less difficult to transport, and they are far more powerful. In addition, they’re quieter than oil-lubed models.
An oil-free air compressor also implies significantly less maintenance, as it will not want oil to perform. This sort of air compressors also functions less moving parts, which indicates fewer places for issues to develop. All oil-totally free air compressors are manufactured to meet up with ISO Class and 1 air purity requirements. They also have considerably less sound and vibration in comparison to their oil-based mostly counterparts. So, why not pick an oil-free of charge air compressor for your enterprise?
air-compressor

Gasoline

When choosing a gas-run air compressor, it really is important to take into account the benefits of gasoline. This power source can energy a huge air compressor with no electrical power. Nevertheless, this sort of air compressor lacks electrical hookup, so you will want to run an extension wire if you want to use it at a distance. Nevertheless, gas compressors are in a position to perform with just a gas tank. This can make them perfect for medium to large-duty industrial apps.
Another essential consideration when choosing a fuel air compressor is its dimension. Bigger compressors are normally bigger than moveable ones and require a lot more space. This helps make them simpler to transport and operate on the go. However, if you’re not sure which kind of air compressor is best for you, consider the gas-run versions. Although they might be lighter, they will not operate as efficiently as their electrical counterparts. Gasoline-run compressors are not as moveable as their electric powered counterparts and need appropriate maintenance.

Electrical power

Electrical energy in an air compressor is not low cost. A 25 HP air compressor runs for 10 hrs every single working day, 5 times a 7 days. The motor in these equipment consumes 746 watts for each hour. To discover out how significantly electrical power the products employs, multiply the wattage by the operating time. For illustration, if the compressor runs for 3 hours, then it will use 1.9 kilowatt hrs of electric power. To figure out how considerably electricity an air compressor employs for each day, you can estimate the kilowatt several hours and multiply the amount by the utility fee. Thinking about this, you can figure out the value of working your air compressor when per thirty day period.
The price of running an air compressor relies upon on the type of compressor. Electric air compressors are frequently silent and can run without any maintenance. These tools can be left unattended for up to four thousand hrs prior to necessitating repair. Electrical air compressors demand greater energy for increased pressure, so you should prepare appropriately. Whether or not you require a routine maintenance visit is up to you, but the advantage of not getting to commit a fortune on repairs is priceless.
Although compressed air is not an vitality-successful resource, its use in a assortment of programs may possibly save you money and kilowatts. Considering that an air compressor employs electrical power when it is managing, the price is decrease than the value of functioning a power device. If you plan to use your air compressor for a lengthy time, make positive that it is taken care of correctly. Correct care will save you cash and electricity, and you may possibly even be able to get an prolonged warranty if the compressor breaks down.
air-compressor

Variable frequency push

The major function of a variable frequency travel (VFD) in an air compressor is to lessen energy intake in the process of compression. A single motor drag program can not alter its pace constantly according to the excess weight of the load. By applying frequency management to the compressor, the power usage can be reduced even though sustaining the exact same force degree. Therefore, a VFD is an superb decision for compressors. Its rewards are many.
A VFD can also check the temperature of the motor and send error signals if the motor is running too very hot or as well chilly. This eradicates the want for a individual sensor to monitor the oil force. These functions are valuable not only in reducing energy usage, but also in improving the functionality of an software. Additionally, a VFD can monitor added variables this kind of as temperature and motor velocity. Hence, it is a valuable investment.
When employing a VFD, it is critical to pick the correct motor. The pace of the compressor must be inside of the highest starting limit of the motor. The air tank might be of any size, but a continual pressure restrict is necessary to keep the VFD operating inside of the provider issue of the motor. In addition to a VFD, a grasp controller ought to also include a remote force established position and a PID card for a learn controller. The transmitter need to incorporate all beneficial info from the VFD, such as the speed and the oil temperature. The VFD need to be tested just before it is integrated with the grasp control. It need to be tested for min and max velocity, temperature, and present within the predicted assortment.
The use of a VFD in an air compressor has a lot of positive aspects. A single of the most noteworthy is the reduction in electrical power use. Set-velocity compressors operate on set points of 6 to seven bar. An extra bar of compression employs 7 p.c of power. This energy is squandered. A VFD-run air compressor can also enhance the life span of compressor areas. It is one of the greatest investments in your compressor. So, why hold out any more time?

China Good quality 5HP-10HP Single Phase Permanent Magnet Frequency Conversion Rotary Screw Air Compressor for Industrial Use     with Hot sellingChina Good quality 5HP-10HP Single Phase Permanent Magnet Frequency Conversion Rotary Screw Air Compressor for Industrial Use     with Hot selling