Tag Archives: silence air compressor

China 750W-30L Silence Oil Free Air Compressor Oilless Air Compressor

Product Description

 

Model Horsepower Voltage Exhaust Volume Pressure Tank Noise Weight Meas
(KW/HP) (V/Hz) (L/min) (Bar) (L) (dB) (Kg) (cm)
YM750-30L 0.75/1 220/50 165 8 30 ≤48 25 46×46×62

Features:
1 It can support 1pcs dental unit
2 CE Approved
3 Color options: blue, white,yellow,red,black 
4 OEM can be made according to client’s request
5.uesd in dental chair

Quality control:
Following the sales tenet of “Quality First, Customer Foremost”, the company has gradually established an image of top products, premium quality, and best reputation”

Customer questions & answers
Q: What’s your MOQ?
A: Our MOQ is 5 units per model . 

Q: What’s your payment terms?
A: We accept T/T ;
 
Q: What’s the delivery time?
A: We could deliver the goods within 30 days after order confirmed(OEM order)

 

Choosing an Air Compressor

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

Positive displacement

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

Oil-injected

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

Oil-free

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

Single-stage

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

Low-noise

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

China 750W-30L Silence Oil Free Air Compressor Oilless Air Compressor China 750W-30L Silence Oil Free Air Compressor Oilless Air Compressor

China Air-Compressors Industrial Machines portable Car Dental Pump 100 Liter 8 Bar Oil Free Oilless Silence Rotary Air Pump Screw Air Compressor with Air Tank

Product Description

Manufacturer low noise power saving 37KW permanent magnet variable frequency screw air compressor 6.8 cubic air compressor screw

 

 .Schematic diagram of the whole set of installation effect:

 

 

Rated exhaust pressure

3.0 Mpa

Drive way

Secondary
direct
connection

cooling method

Air cooling

Outlet temperature

Ambient temperature +25 ºC

Noise

65 dB(A)

Gas supply oil content

≤2 PPM

Dimensions

1650×1150× 1310 L×W×H(mm)

Total weight

868 Kg

Rated working power

3/380/60 PH/V/HZ

Motor protection level

IP54

Insulation class

Class F insulation

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Company Information
 

 

The Air Compressor Is a Versatile Tool

The Air Compressor is 1 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 10 hours each day, 5 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 3 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 4 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 6 to 7 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 1 of the best investments in your compressor. So, why wait any longer?

China Air-Compressors Industrial Machines portable Car Dental Pump 100 Liter 8 Bar Oil Free Oilless Silence Rotary Air Pump Screw Air Compressor with Air Tank China Air-Compressors Industrial Machines portable Car Dental Pump 100 Liter 8 Bar Oil Free Oilless Silence Rotary Air Pump Screw Air Compressor with Air Tank

China Hot selling Air Compressormake Oxygen Concentratoroil- Free Silence Air Compressor with Best Sales

Item Description

Solution Paramenter

 

 

 

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Organization Profile

 

 

FAQ

 

Q.1: What is your factory deal with ? Could I go to your manufacturing unit ?
Our manufacturing facility is positioned in HangZhou city, ZHangZhoug province, in close proximity to to HangZhou, ZheJiang and HangZhou, about 2 hrs by bus or practice.Welcome to pay a visit to our factory.
Q.2: When I get my goods, is there anything at all I must spend interest to ?
It want to clear the filter once each and every 2 months.When use it, it require to handle with treatment and spend much more attention to watertight.
Q.3 : Can I acquire the sample to take a look at?
We are pleased to send out the samples for your evaluation.And the samples transport freight can be return back to you with next bulk purchase .
Q.4: Do you have test records of every single pump?
We will examine merchandise 3 occasions prior to cargo and each pump have the examination records. We will keep these take a look at documents to our high quality traceability method about 3-5 several years.
Check things : workmanship, air circulation rate, energy, pressure, current, noise, vibration , temperature and toughness etc.

Q.5: How extended is the lifestyle of the your pump?
“High quality is our culture”, our compressor with long existence (20000 hrs ) and high high quality ( secure air stream, import spare components,
substantial workmanship and so on ).
Q.6: What is your warranty?
Our guarantee is 2 a long time.It means that if our device has any problems within 2 many years, we will ship you new 1 or cost-free spare components for your substitute.
Q.7: Question : How many several years of your manufacturing unit?
Our factory has the creation encounter a lot more than twenty several years.
We make primary spare components of compressor by ourselves (include the motor), so we can management the compressor high quality very effectively
Q.8: Issue: Can you make goods identical/ equivalent with mine?
We have professional and experienced R & D crew, so we can better serve clients to attain higher-end customization and growth. We accept the ODM and OEM.

 

 

 

 

 

 

 

 

 

Choose an Air Compressor for Your Business

There are several variables to think about when selecting an air compressor for your organization. One factor to take into account is the type of compressor you are searching for, which may contain solitary-stage, low sound, and good displacement. Hope this article helps you make the correct decision. Right after all, your company accomplishment will count on this system! Let us just take a nearer seem at these aspects. Also, think about what compressor companies say about their merchandise.
air-compressor

Constructive displacement

Good displacement air compressors compress air by drawing in a quantity from an inlet and extruding it out of a chamber. This boosts the stress at which the gas can be pumped at charges that cannot be pumped by way of the outlet at reduce pressures at greater mass flow rates. These types of compressors are available in single-performing and double-performing configurations. They are categorized by the number of cylinders.
There are two diverse varieties of air compressors: reciprocating air compressors and screw compressors. Both are roll machines. Positive displacement air compressors use pistons and cylinders to compress air. The resulting air stress builds up inside of the compressor housing, increasing the potential energy of the compressed air. Screw air compressors are the most popular constructive displacement air compressors, which can be both single-stage screw-blade air compressors or multi-phase screw-blade oil-immersed screw air compressors.
Good displacement flowmeters use a rotating measuring chamber to divide the fluid into discrete portions. The amount of times the chamber was refilled and emptied was used to estimate the complete circulation. However, constructive displacement movement meters are susceptible to leaks, minimizing the accuracy of the estimates. If a leak happens, it can lead to fake readings and damage the compressor. Nevertheless, leaks in constructive displacement air compressors can reduce pressure.
The most common types of positive displacement air compressors are screw, reciprocating, and vane. Rotary constructive displacement air compressors are also offered as well as several other air compressors. Constructive displacement air compressors are most frequently utilised in massive production amenities. If you are considering an air compressor for professional or industrial purposes, it is essential to realize how the factors of the device work. Please read through the data below to find out more ahead of selecting which software is ideal for you.
Good displacement air compressors use a piston to force air into a chamber, compressing the air in the method. The piston moves in the opposite course, therefore reducing the quantity of the chamber. When the amount of air in the chamber reaches its optimum benefit, the valve opens, making it possible for it to escape at greater stress. Good displacement air compressors are generally much less productive than centrifugal compressors. Even so, they are nonetheless an outstanding selection for a selection of apps.
air-compressor

Single-stage

The discharge pressure of the one-stage air compressor is utilized to manage the procedure of the compressor. Appropriately developed load/unload controls allow the air compressor to operate at its most efficient position while minimizing pressure on the primary motor bearings. Single-phase air compressors can technique variable pace efficiency with acceptable storage potential. Nevertheless, inappropriate storage can trigger untimely bearing dress in on the primary device. If this is the circumstance, a solitary-stage air compressor could not be ideal.
A solitary-phase air compressor has only one particular cylinder, which implies 1 stroke is required to shift air from one cylinder to yet another. Stress is calculated in cubic feet per moment or CFM. Tank dimensions is also crucial as a huge one-stage air compressor could be essential to operate a number of air resources. Solitary-phase air compressors can be employed in a assortment of programs and can previous for a long time.
For the most widespread uses, solitary-stage air compressors are the most sensible alternative. These devices perform with most hand instruments, from hammers to grinders. One-phase air compressors are light-weight and simple to go. However, two-stage air compressors offer much more CFM, generating them a far better choice for industrial or commercial use. Nevertheless, two-stage compressors are not ideal for private use. Therefore, if your primary goal is Do it yourself and craft projects, it is much better to select a single-phase air compressor.
In comparison with two-stage air compressors, single-phase screw air compressors are less costly. They come from a selection of producers and selection in electrical power from 3 to 600 horsepower. Single-phase air compressors are a value-powerful remedy for a range of air compressor demands. They provide flexibility and numerous management techniques, creating them an exceptional option for numerous distinct apps. For that reason, when selecting an air compressor for your enterprise, choose the a single with the most ideal features.
Single-phase air compressors are the most inexpensive and simple-to-use air compressors for little to medium jobs. They also have increased compression ratios. The compression ratio is the ratio of absolute discharge stress to absolute inlet pressure. When calculating the ratio, it will take into account atmospheric stress and gauge force. The compression ratio pushes the area region of ​​the rotor, which increases the thrust load.
One-stage air compressors are smaller and less complicated to transport than two-stage units. Solitary-phase air compressors have one particular air consumption, and two-stage air compressors have two air intakes. The distinction in between one-stage and two-phase air compressors mostly is dependent on the number of times the air is compressed. A one-stage air compressor compresses the air once, although a dual-phase air compressor compresses the very same volume of air twice.
air-compressor

reduced sound

Lower sound air compressors are excellent for a selection of programs. Whilst no air compressor is completely silent, some designs are considerably quieter than others. For the Hitachi EC28M portable compressor, the sounds level is fifty nine decibels. The compressor functions steel rollers that shield the internal elements and give it a sleek, modern appear. It also has a a single-gallon gasoline tank and a half-horsepower drive.
Noise from air compressors can be distracting and minimize productiveness. It is important to select low-noise air compressors to preserve employees healthier and satisfied at perform. Even though sound is an regrettable facet of operating on the store flooring, reducing it can improve efficiency. By decreasing distracting sound, staff can target on their work and connect more successfully. That indicates higher quality function and happier clientele. If you’re looking for a low-sounds air compressor, be positive to go through the suggestions below.
Lower sounds air compressors are an exceptional choice for businesses of all dimensions. These strong resources can operate several tools at the same time. The two water tanks are made of rust-resistant aluminum and are stackable. This air compressor is heavier and can handle large jobs with relieve. It fees a lot more than other air compressors, but it can take care of a lot of perform successfully. CZPT Air Equipment air compressors appear with a 1-yr warranty and are extremely suggested by contractors.
Noiseless air compressors are generally much more costly than similar products, but they are worth the additional expense. Noiseless compressors are a very good selection for organizations that require to steer clear of disturbing close by individuals. For illustration, you may possibly want to think about a low-noise air compressor for a dental business office, which cannot tolerate sounds. Luckily, this difficulty can be solved by relocating the compressor to a place that is far more isolated from your workspace.
1 brand name of low-noise air compressors offers two designs. The CZPT Air Instruments 2010A characteristics a massive solid aluminum can, regulating stress gauge, and two common swift-connects. It generates 68 decibels of sound when it works. It has a big 8-gallon gasoline tank capability and has wheels and handles for simple transport. Its powerful engine generates a minimal noise level of sixty eight decibels.
Another well-liked reduced noise air compressor is the Makita MAC210Q Peaceful Series. This model is able of making up to 71.5 decibels of audio, which is the quantity of air it produces at 90PSI. The MAC210Q attributes a sturdy oil-free of charge pump and weighs just 36 lbs with a deal with and wheels. These compressors are straightforward to transfer and ideal for indoor operate.
China Hot selling Air Compressormake Oxygen Concentratoroil- Free Silence Air Compressor with Best SalesChina Hot selling Air Compressormake Oxygen Concentratoroil- Free Silence Air Compressor with Best Sales