Tag Archives: power dc motor

China CZPT Portable AC and DC Power Quiet Silent Oil Free Brushless Induction Motor Cordless Air Compressor High Cfm Air Compressor

Product Description

Professional technology changes people’s lives ! We,ZHangZhoug CZPT Tools Co.,Ltd, are manufacturer specialized in the production of high performance air compressors and cutting machines based on customers’ using requirements with the continuous research and development of new technology.
The CZPT AC&DC series air compressors Oil-Free Compressor is portable and lightweight. It features an oil-free, maintenance-free Permanent magnet brushless pump for continuous 24hours running time with quick recovery.

Model Pressure Range Running Power Air Delivery Tank Voltage N.W. LI-ION Battery Joint
DC2090 0.14-0.9MPA
(21-135PSI)
500W 80L/MIN 5L DC12-30V
AC110V-240V
10.5KGS BOSCH,XIHU (WEST LAKE) DIS.A,
DEWALT,MILWAUKEE
BLACK&DECKER
HITACH

 

Choosing the Right Air Compressor For Your Home

You will find that air compressors are indispensable tools for a variety of situations, including garages, home workshops, and basements. These tools can power a variety of tools, and each model is sized to suit the job at hand. Because air compressors have only 1 motor, they are lightweight, compact, and easy to handle. Using 1 air compressor to power several tools will also reduce the wear and tear on individual components. This article will introduce some important characteristics to look for when choosing the right air compressor for your home.

Positive displacement

A positive displacement compressor applies pressure to a fluid, whereas a centrifugal 1 does the opposite. A positive displacement compressor creates the desired pressure by trapping air and increasing its volume. Its discharge valve releases the high-pressure gas. These compressors are used in industrial applications and nuclear power plants. The difference between a positive and negative displacement compressor is that a positive displacement compressor can compress and release air at a consistent rate.
A positive displacement air compressor uses a reciprocating piston to compress air. This reduces the volume of the air in the compression chamber, and a discharge valve opens when the pressure reaches the desired level. These compressors are used in bicycle pumps and other pneumatic tools. Positive displacement air compressors have multiple inlet ports and have several configurations. Positive displacement air compressors have a single-acting and double-acting piston, and can be oil-lubricated or oil-free.
A positive displacement air compressor is different from a dynamic compressor. It draws air into the compression chambers and then releases the pressure when the valve is opened. Positive displacement compressors are common in industrial applications and are available in single-acting, double-acting, and oil-lubricated models. Large piston compressors have ventilated intermediate pieces and crossheads on gudgeon pins. Smaller models have permanently sealed crankcases with bearings.
air-compressor

Oil-free

Oil-free air compressors have some advantages over their oil-lubricated counterparts. They do not require lubrication oil because they are coated with Teflon. The material has 1 of the lowest coefficients of friction and is layered, so it slides past other layers with little effort. Because of this, oil-free compressors tend to be cheaper and still deliver comparable performance. Oil-free compressors are a good choice for industrial applications.
The life of an oil-free air compressor is significantly longer than an oil-lubricated counterpart. These models can operate up to 2,000 hours, 4 times longer than the average oil-lubed compressor. Oil-free compressors also have a significantly lower operating noise than their oil-lubricated counterparts. And because they don’t need oil changes, they are quieter. Some even last up to 2,000 hours.
An oil-free air compressor is a good choice if your application requires high levels of purity. Several applications require ultra-pure air, and even a drop of oil can cause product spoilage or damage to production equipment. In addition to the health risks, an oil-free air compressor reduces the costs associated with oil contamination and minimizes leaks. It also eliminates the need for oil collection, disposal, and treatment.
A typical oil-free air compressor is very efficient, requiring only about 18% of the full load horsepower. However, oil-free compressors have a higher risk of premature failure and are not recommended for large-scale industrial applications. They may also use up to 18% of the compressor’s full capacity. They may sound appealing, but you must make sure you understand the benefits of an oil-free air compressor before choosing 1 for your industrial applications.

Single-stage

A single-stage air compressor is designed to provide the power for a single pneumatic tool or device. These machines are generally smaller than two-stage compressors and produce less heat and energy. These machines aren’t designed for heavy-duty industries, but they are still highly effective for a variety of applications, including auto shops, gas stations, and various manufacturing plants. They can also be used in borewells, as they are suitable for small spaces with low air flow requirements.
A single-stage air compressor has 1 cylinder and 2 valves – the inlet and the delivery valves. Both of these valves function mechanically, with the inlet valve controlling torque and the delivery 1 controlling air pressure. Generally, single-stage compressors are powered by a gas engine, but there are also electric models available. The single-stage air compressor is the most common type of air compressor. It has a single cylinder, 1 piston, and 1 air cylinder.
The single-stage air compressors are used for small projects or personal use. A two-stage air compressor is more effective for industrial projects. Its longer air end life makes it more efficient. It is also more efficient for use in the automotive industry, where the engine has many cylinders. In general, single-stage compressors require a higher power level. The single-stage model is ideal for small projects, while a two-stage 1 is suitable for larger-scale arsenals.
air-compressor

CFM

The cubic foot-per-minute (CFM) of an air compressor is the output of the machine. In order to calculate the CFM level, start by looking at the compressor’s specifications. You should know how many cubic feet the unit can hold and how many pounds per square inch it can compress. Once you have these information, you can calculate the CFM. Now you can use these numbers to select an appropriate air compressor for your needs.
The most common way to increase the CFM of an air compressor is to turn the regulator down. By turning the dial down, the air compressor will produce more than 10 CFM. You can also try connecting 2 output valves. Make sure that the settings are adjusted properly before you begin. This will ensure that your air compressor is functioning at its maximum efficiency and lifespan. To increase the CFM of your air compressor, first check that your regulator is calibrated for the desired pressure level.
To calculate the CFM of an air compressor, first determine the tank volume of the machine. Then, multiply this volume by the time it takes to fill the tank. Then, divide the result by 60 seconds to calculate the CFM. Once you know how much air your machine can hold, you can choose a suitable air compressor. If you’re working in a confined area, you should buy a tool with a large tank.

PSI

The PSI of an air compressor is the pressure that it can output. A typical air compressor has a gauge connected to the airline at the bottom, next to it, or between the two. The gauge tells the actual pressure of the air compressor, while the cut-out pressure is determined by the manufacturer. The manufacturer recommends that you set the cut-out pressure 20 to 40 PSI higher than the factory recommended pressure. If you want to set the pressure for your nail gun, you can use the cut-in and cut-out pressures on your compressor, and the tank won’t exceed this range.
The PSI of an air compressor measures the force that it can deliver, which is often in pounds per square inch. For most air tools, you need at least 40 to 90 psi. In general, reciprocating air compressors work on an on/off basis. This relationship is known as the duty cycle. All air compressors are rated for a particular duty cycle, such as 50 percent on and 20-5 percent off.
The Psig of an air compressor is not free, as many people believe. The PSI of an air compressor is not free, but it is essential to maintain it for safe operations. If you’re having trouble maintaining a consistent pressure, consider turning down the PSI of your compressor by 2 psig. This will determine the critical pressure for the machine. You’ll also increase the amount of energy in the system by 1 percent.
air-compressor

Power source

The power source for an air compressor is crucial in its operation. Without the correct voltage and amperage, air compressors will not function properly. The power source must be close to the compressor so that it can plug into an electrical outlet. If it is too far from the outlet, the compressor may not be able to build enough pressure. When this happens, the fuse inside the air compressor will turn off to protect the user. The power source should be a safe distance from the compressor.
Most manufacturers do not specify the power source for an air compressor. Depending on the horsepower, the compressor will require approximately 4 amps of power. A one-horsepower compressor would draw about 12 amps. If it were powered by a typical 120-volt household supply, its motor would exceed the 15-amp breaker capacity. A larger air compressor, however, will require a separate 15-amp power source, making it impossible to use it with this type of power source.
The power source for an air compressor is typically electrical alternating current (AC) that is equivalent to the voltage on a standard wall outlet. A three-phase air compressor, on the other hand, requires a special AC supply with 3 electrical offset pulses. Regardless of the type of air compressor, the power source must be compatible with the incoming power service. One of the most common problems when attempting to connect an air compressor to an AC power source is undersized wire. This results in low voltage and high amperes, tripping of over-load relays and blown fuses.

China CZPT Portable AC and DC Power Quiet Silent Oil Free Brushless Induction Motor Cordless Air Compressor High Cfm Air Compressor  China CZPT Portable AC and DC Power Quiet Silent Oil Free Brushless Induction Motor Cordless Air Compressor High Cfm Air Compressor

China CZPT Portable AC and DC Power Dual-Purpose 2 in 1 Quiet Silent Oil Free Permanent Magnet Brushless Motor Cordless Lightweight Air Compressor

Product Description

Professional technology changes people’s lives ! We,ZHangZhoug CZPT Tools Co.,Ltd, are manufacturer specialized in the production of high performance air compressors and cutting machines based on customers’ using requirements with the continuous research and development of new technology.
The CZPT AC&DC series air compressors Oil-Free Compressor is portable and lightweight. It features an oil-free, maintenance-free Permanent magnet brushless pump for continuous 24hours running time with quick recovery.

Model Pressure Range Running Power Air Delivery Tank Voltage N.W. LI-ION Battery Joint
DC2090 0.14-0.9MPA
(21-135PSI)
500W 80L/MIN 5L DC12-30V
AC110V-240V
10.5KGS BOSCH,XIHU (WEST LAKE) DIS.A,
DEWALT,MILWAUKEE
BLACK&DECKER
HITACH

 

What to Look For When Buying an Air Compressor

An air compressor is a very useful tool that can help you complete many different types of construction jobs. This handy machine makes many tasks much easier, but not all of them are created equally. Understanding what to look for when buying an air compressor will help you make an informed decision. Here are some of the things you should look for. These include price, size, and energy efficiency. Also, make sure to consider the air compressor’s type.
air-compressor

Single-stage air compressors are quieter

When it comes to noise level, single-stage air compressors are the way to go. These machines have fewer moving parts and are quieter than two-stage models. Single-stage air compressors use an axial flow design and can be quieter than their dual-stage counterparts. Single-stage air compressors can run longer and at lower pressures. Single-stage air compressors can be used for light industrial applications. They have a long life expectancy, with some models lasting for over 3 thousand hours.
While some single-stage air compressors are quieter than two-stage air compressors, both models have noise-reduction features. One type features rubber parts, which are designed to dampen noise. Another feature makes a compressor quieter: its location near the job site. Some models feature rubber base plugs and rubber mats to reduce floor vibrations. In addition to using these features, single-stage compressors are easier to transport.
Noise levels are important when choosing an air compressor. Some machines are too noisy for comfortable work, and some businesses don’t want to expose customers to noise-generating air compressors. Other noise levels can even endanger workers’ health. Single-stage air compressors are more affordable than dual-stage compressors. They are also quieter and more powerful. But be prepared for the noise. Some single-stage air compressors are still noisy.
Compared to their two-stage counterparts, single-stage compressors are quieter when running at full capacity. However, double-stage compressors are quieter on low capacities than single-stage units. Those with variable speed are quietest at lower capacities. The difference is about 10db. If you’re concerned about the noise level, you should consider a two-stage air compressor. But if you have a small workshop, it may not be suitable for you.
One-stage air compressors are generally more efficient than two-stage air compressors. The noise from a two-stage air compressor is lower because there’s no intermediate stage. Single-stage air compressors also use a piston that rotates in a single stage, while dual-stage air compressors, also known as duplex models, are more efficient. A single-stage air compressor is quieter, but double-stage compressors are louder.
air-compressor

Two-stage air compressors are more energy efficient

Two-stage air compressors are more energy-efficient than single-stage machines. The efficiency of two-stage air compressors is increased through a combination of improved efficiency and increased longevity. These machines can store more air and have higher compression ratios. One model of a two-stage compressor can hold approximately 83 cubic feet of air at 100 PSI and 120 cubic feet at 150 PSI. A two-stage compressor is also quieter.
Two-stage air compressors are more energy-efficient because they have 2 pistons instead of one. These air compressors achieve a higher pressure rating and recover more quickly. This type of compressor is perfect for jobs that require high air pressure for a prolonged period of time. In addition, they can operate multiple tools simultaneously. This makes them better for commercial and industrial use. Listed below are some benefits of two-stage air compressors.
Single-stage air compressors can power tools in the garage or kitchen, but they are not as reliable for industrial applications. Single-stage compressors have larger parts that tend to experience condensation. Furthermore, single-stage compressors do not last long in continuous use and are less energy-efficient than two-stage ones. Whether you’re using the compressor for a single tradesperson, a small crew, or a large construction crew, two-stage compressors are the best choice.
Single-stage air compressors are often used in small-scale food preparation and production. Single-stage air compressors are easy to transport between locations, and can be plugged into several electrical outlets. Single-stage compressors are also ideal for high-volume food processing. A dual-stage air compressor is ideal for industrial use. In some cases, you can even move the single-stage air compressor between two-stage air compressors.
Single-stage compressors often cycle too quickly, drawing more electricity than two-stage units. A variable speed unit stays on a low speed for hours at a time. Single-stage air conditioners force you to lower your thermostat settings while single-stage air conditioners run too often. Both units are energy-efficient but they are not as energy-efficient as variable-speed compressors. The main difference is that single-stage air conditioners tend to drain the power source quicker.

Piston-driven air compressors are quieter

A piston-driven air compressor is 1 of the quietest types of air compressors. It is less noisy than reciprocating air compressors. A piston-driven air compressor can reach 62 decibels, while a scroll compressor is around half that volume. The 2 main components of a scroll air compressor are the piston and the helical screw. These air compressors are both very efficient and quiet.
Older compressors are incredibly noisy. They produce a “wumpa” noise similar to a large engine. They are also capable of producing a high-pitched whine. These noises can be deafening, especially in a small workshop. That’s why it’s essential to look for a quiet compressor. But what makes a compressor quiet? Read on to learn more about this essential tool.
Another difference between piston-driven air compressors and electric-driven air compressors is the power source. Electric air compressors produce less noise than gas-powered compressors, which use an engine. Piston-driven air compressors are also more efficient. They also generate less heat, making them an ideal choice for offices and other settings where noise is a problem. The best way to decide between the 2 types of air compressors is to check the manufacturer’s warranty and read the ‘Description’.
Noise reduction is the first priority of a compressor’s owner, so make sure that you have the right model. If you’re working on something sensitive, don’t place the compressor too close to a building where people might be nearby. Noise can be very disruptive to the workspace and can cause health problems. To help combat noise, you’ll need to buy a quiet air compressor. And don’t forget to consider its location: Piston-driven air compressors are quieter than their reciprocating counterparts.
Piston-driven air compressors are quiet because the piston is made of thin metal and more rubber, which absorbs the sound. Unlike reciprocating air compressors, piston-driven air compressors are more efficient than their dual-piston cousins, which are quieter and more powerful. So which type is right for you? Take a look at some of the main differences between the two. If you want a quiet compressor, make sure it meets the specifications required by the job you’re working on.
air-compressor

Oil-lubricated air compressors are more cost-effective

There are several reasons why oil-lubricated air compressors are more expensive than dry-type air compressors. First of all, oil-lubricated air compressors tend to be more reliable and quiet. Additionally, oil-lubricated air compressors require fewer parts and can last longer than dry-type air compressors. These are just a few of the many benefits of using oil-lubricated air compressors.
Oil-free air compressors have some disadvantages. They are less durable and may not be as efficient as oil-lubricated models. Additionally, because oil-lubricated air compressors use oil, they can get very noisy. While they are less expensive, they are not the best option for heavy-duty work. However, modern oil-free air compressors have soundproofing and are suitable for industrial use.
When purchasing an oil-lubricated air compressor, make sure to choose 1 with a tank capacity that meets your needs and your space. Larger tanks can be more expensive than small tanks, but larger units are easier to move around. Also, be sure to consider the weight and size of the portable air compressors when making your choice. If the weight is too large, you may have trouble carrying it from place to place.
Another benefit of using oil-lubricated air compressors is their reduced need for oil. These models can last up to a decade longer than oil-free counterparts. Oil-free air compressors are more affordable and can achieve the same high performance as their oil-lubricated counterparts. Many industrial applications benefit from these air compressors. So, which 1 is right for you? We’ve listed a few of them below.
Another benefit of choosing an oil-lubricated air compressor is the reduced cost of maintenance. This type is more durable than its oil-lubricated counterparts, which require regular oil changes to keep them running smoothly. However, it is not feasible to transport an oil-lubricated compressor, which means that you must install it permanently to keep it working efficiently. In addition, these air compressors are difficult to move and are not portable, which can limit your ability to use it in a pinch.

China CZPT Portable AC and DC Power Dual-Purpose 2 in 1 Quiet Silent Oil Free Permanent Magnet Brushless Motor Cordless Lightweight Air Compressor  China CZPT Portable AC and DC Power Dual-Purpose 2 in 1 Quiet Silent Oil Free Permanent Magnet Brushless Motor Cordless Lightweight Air Compressor

China Standard CZPT Portable AC and DC Power Dual-Purpose 2 in 1 Quiet Silent Oil Free Permanent Magnet Brushless Synchronous Motor Industrial Air Compressor with Good quality

Merchandise Description

Professional technological innovation alterations people’s lives ! We,ZHangZhoug CZPT Tools Co.,Ltd, are maker specialised in the manufacturing of higher performance air compressors and chopping equipment primarily based on customers’ using demands with the steady research and growth of new technology.
The CZPT AC&DC series air compressors Oil-Free Compressor is moveable and lightweight. It features an oil-totally free, maintenance-cost-free Long term magnet brushless pump for ongoing 24hours operating time with quick restoration.

 

How to Fix and Keep an Air Compressor

A compressor is a device utilised to transfer air from one spot to another. Air enters the air compressor through the consumption valve. Inside of the compressor, the vanes on the internal rotor rotate within an eccentric cavity. The self-adjusting size arm divides the place into numerous cavities of various dimensions. As the rotor rotates, air fills the cavity. As air flows all around the cavity, it builds pressure and is squeezed out of the compressor output.

Constructive displacement

Constructive displacement air compressors use reciprocating pistons to compress air. Gas is drawn in during the suction stroke and compressed by relocating the piston in the reverse path. It then discharges the compressed air by shifting it in the reverse direction. This sort of air compressor is most commonly located in vehicles, refrigerators, and other applications that need high strain. However, it is not as efficient as a centrifugal compressor.
Most contemporary air compressors use optimistic displacement. Good displacement designs seize a volume of air in the compression chamber and distribute it when the pump is operating at maximum capacity. They are more economical than their unfavorable displacement counterparts. Reciprocating screw air compressors are the most typical positive displacement compressors. The reciprocating screw air compressor adopts a h2o jacket around the cylinder and is typically utilised in processes this sort of as oil drilling.
A bicycle pump is an illustration of optimistic displacement compression. Air is drawn into the cylinder and compressed by the moving piston. A piston compressor functions on the exact same basic principle, but it uses a rotating crankshaft or connecting rod to complete the movement of the pistons. There are two sorts of optimistic displacement compressors: one-performing and double-acting. Equally sorts operate on the identical principle, both are optimistic displacement compressors. The distinction amongst the two sorts is the force ratio.
In air compression, good displacement compression reduces the quantity of the fluid and minimizes its viscosity. This results in increased force ratios and is employed in centrifugal, axial, and scroll compressors. Optimistic displacement is a widespread attribute of most air compressors. Constructive displacement compressors offer the identical rewards and are a lot more energy-productive when used to oil-totally free and gasoline apps. This variety of compression is typically the greatest choice for minimal-pressure purposes.
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oil totally free

If you might be looking for an air compressor for your business, think about an oil-free air compressor. These designs offer you cleaner, quieter procedure than conventional air compressors and require considerably less servicing. They also satisfy ISO Class or Course 1 air purity specifications. Oil-cost-free air compressors are also quieter, with fewer shifting areas and less sound. These advantages make oil-cost-free air compressors an excellent remedy for numerous industrial purposes.
Air purity is crucial in numerous industries. Even the tiniest drop of oil can hurt production equipment or harm goods. The best way to uncover an oil-free of charge air compressor for your company is to consider the process and stop item. As air good quality enhances, far more and much more companies are turning to oil-free of charge compressors. Some of the advantages and negatives of these air compressors are:
When selecting an oil-cost-free air compressor, it is important to realize the terminology utilised in the business. Knowing these conditions will make it easier for you to choose the appropriate compressor for your demands. ACTFM, or actual cubic ft for each moment, is an sector expression for measuring the sum of air pumped in 1 minute under rated problems. Even though a simple amount, it can be really beneficial in figuring out which type of air compressor is very best for your application.
The ISO 8573-1 intercontinental normal defines air top quality and offers air purity classifications. The strictest classification is air purity class . A lot of companies assert that oil-free air compressors meet this common. However, a class oil-cost-free air compressor does not essentially indicate that the air is free of charge of contaminants. In simple fact, Course is the benchmark for air purity. Although zero air quality is the maximum level, that doesn’t suggest it is fully oil-free of charge.
air-compressor

double performing

A double-acting air compressor is a device that employs compressed air to create electric power. Its functioning theory is based mostly on piston and connecting rod. The connecting rod connects the crankshaft to the piston through pins and caps. The piston moves as the piston moves. Rods are usually manufactured of solid carbon metal. In terms of services and maintenance, double-acting compressors call for typical vise maintenance and appropriate cleaning.
The displacement of the compressor is a measure of the displacement that the piston can produce in a specified interval of time. Displacement is usually expressed in genuine cubic feet for every minute. The exact calculation is dependent on the variety of cylinder and the configuration of the compressor. Single-performing cylinders can have head-stop or crank-finish displacement, the two of which can be calculated utilizing the displacement equation. A double-acting air compressor will use this equation. 4 and 6 compute the displacement.
Double-performing air compressors have a number of cylinders and are produced of forged iron. They are h2o-cooled and have a mechanical relationship between the piston and connecting rod. A double-performing compressor compresses air two times for each revolution of the motor. One cylinder moves up, although the other cylinder moves down. The piston moves down, making it possible for air to enter through valve #1. For the duration of the procedure of the compressor, the temperature of the air and fuel increases.
Double-acting air compressors usually have substantial strain and are deemed workhorses. Double-performing compressors also characteristic intercooling and double compression. As a result, these equipment are inclined to very last for a longer time than solitary-performing compressors. Its lower speed and twin compression make it a workhorse in the compressor industry. Double-performing air compressors are workhorses and versatile gadgets.
air-compressor

fuel tank pressure swap

You can alter the pressure in the air compressor tank by adjusting the differential pressure. You can change the mainspring clockwise or counterclockwise to increase or reduce the strain. This valve will open when the force is minimal enough to start off the compressor. If the pressure is too reduced, the valve should be closed. The cut-in and lower-out pressures need to be established to appropriate values. Right after modifying the tank strain, check out the hysteresis of the tank pressure swap and established the sought after shutoff strain.
If the force in the tank falls beneath the cut-in stage, the tank pressure change should be changed. You can test the switch with a multimeter. Make sure the switch is not destroyed. If you cannot locate the change, you can look at the other sections. If you uncover any damaged or missing elements, you need to substitute them. Normally, it may possibly be time to examine the tank pressure change. You may possibly require to disassemble the compressor and take away the swap.
The fuel tank pressure switch is an important part of the air compressor. It retains you informed of the volume of air sent by the compressor. If your tank or tank is broken, your readings will be mistaken. If the pressure swap is damaged, it will not purpose properly and consequence in incorrect readings. Luckily, there are some effortless ways to resolve this. To prevent this from occurring, maintain the tank strain switch in good problem.
When the air pressure in the tank drops to the reduce-in pressure setting, the swap enables electrical power to stream via it. This will commence the motor and pump of the air compressor. Then, if the pressure in the tank rises previously mentioned the reduce-off degree, the change will excursion and cease the compressor. This will avoid it from currently being in excess of-pressurized. Power flow will continue to circulation to the motor. Depending on your compressor design, you can modify the reduce-in and reduce-out pressures as required.

energy source

The electricity supply of the air compressor is quite essential. Most air compressors operate on twelve VDC, which is perfect for automotive use. Alternatively, you can get a switching electricity supply for all around $20. No subject which electrical power offer you pick, you have to guarantee that it can support the maximum recent of the compressor. You can uncover energy supplies in all measurements, from quarter-horsepower to five-horsepower.
The voltage necessary for a three-period air compressor will vary. Three-stage air compressors require three separate electrical power cords and a three-section electrical service panel. This is simply because a regular 120/240-volt electrical provider panel is not enough to electrical power a three-section compressor. Additionally, three-stage compressors call for three individual isolated wires for the engine and motor circuits. Three-phase compressors do not demand a neutral wire.

China Standard CZPT Portable AC and DC Power Dual-Purpose 2 in 1 Quiet Silent Oil Cost-free Long lasting Magnet Brushless Synchronous Motor Industrial Air Compressor     with Good top qualityChina Standard CZPT Portable AC and DC Power Dual-Purpose 2 in 1 Quiet Silent Oil Free of charge Permanent Magnet Brushless Synchronous Motor Industrial Air Compressor     with Excellent quality