Tag Archives: oil-free scroll air compressor

China Hot selling 3kw 4HP 220V Single Phase Oil Free Small Rotary Scroll Type Air Compressor Machine Price for Home Industrial Workshop Shop supplier

Product Description

Product Description

 

Type: Oil Free Scroll Air Compressor
Voltage: 380V/50HZ/3P, 220V/60HZ/3P, 400V/50HZ/3P, 415V/50HZ/3P or Customer′s Requirements
Working Pressure: 8~10bar
Installed Motor Power: 3.0-50 Kw
Color: Blue,white
Driven Method: Belt Driven
Transport Package: Standard Wooden Packing
application: Dentistry,Laboratory,New Energy

Product Features
1.High quanlity oild free compressed air.
2.High efficiency oil free scroll airend.
3.Low Energy Consumption,Low running,maintenance cost.
4.Aptitude and intelligent Control, integrated touch-screen PLC displayer.
5.Unique safe units make whole compressor more safety, more stable,lest noise,lest energy Loss.
6.Easy to install,operate,maintain.

Product Parameters

 

Model Capacity Pressure Motor power QTY of air end  QTY of motor Noise Level Diemensions Weight Diameter of air outlet pipe Inner air tank Outside air tank
  m3/min Mpa kW hp PCS PCS dB(A) mm KGS inch L L
D04/08-A1 0.3 0.8 3.0  4.0  04*1 1 55±2 760*690*820 200  3/4 5     /
D04/08-A4 0.4/0.3 0.8/1.0 3.7 5 04*1 1 55±2 760*690*820 200  3/4 5     /
D04/08-J3 0.4/0.3 0.8/1.0 3.7 5 04*1 1 55±2 1400*780*1485 450  3/4 / 200    
Q08/08-S1 0.8 0.8 7.5 10 04*2 2 60±2 1400*700*1200 400 1 1/2 24     /
Q08/08-S1 0.8 0.8 7.5 10 04*2 2 60±2 1400*780*1485 450 1 1/2   /
D06/08-A4 0.6/0.4 0.8/1.0 5.5 7 0.6*1 1 55±2 760*690*820 200  3/4 5     /
D06/08-J3 0.6/0.4 0.8/1.0 5.5 7 0.6*1 1 55±2 1400*780*1485 450  3/4 / 200    
Z12/08-S1 1.2/0.8 0.8/1.0 11 15 0.6*2 2 60±2 1400*700*1200 350 1 1/2 24     /
D06/08-J5 0.6 0.8 5.5 7 0.6*1 1 60±2 1400*780*1485 450 1 1/2   /
Z12/08-J5 1.2 0.8 11 15 0.6*2 2 60±2 1400*780*1485 500 1 1/2   /
Z18/08-S1 1.8/1.5 0.8/1.0 16.5 22 0.6*3 3 62±2 1400*700*1670 500 1 1/2 24     /
Z24/08-S1 2.4/2.0 0.8/1.0 22 30 0.6*4 4 65±2 1400*1550*1200 800 1 1/2 24*2 /
Z30/08-S1 3.0/2.4 0.8/1.0 27.5 37 0.6*5 5 65±2 1400*1550*1670 1080 1 1/2 / /
Z36/08-S1 3.6/3.0 0.8/1.0 33 45 0.6*6 6 65±2 1400*1550*1670 1200 1 1/2 / /
Z42/08-S1 4.2/3.6 0.8/1.0 38.5 52 0.6*7 7 65±2 2220*1450*1740 1400 1 1/2 / /
Z48/08-S1 4.8/4.0 0.8/1.0 44 59 0.6*8 8 65±2 2220*1450*1750 1520 1 1/2 / /
Z54/08-S1 5.4/4.5 0.8/1.0 49.5 67 0.6*9 9 65±2 2220*1450*1750 1650 1 1/2 / /

Company Profile

HangZhou CHINAMFG Mechanical & Electrical Equipment Co., Ltd, established in 2571, is a professional enterprise engaged in the research, development, sale and service of air compressor, screw air compressor, air dryer, filters, oxygen generator, nitrogen generator and wet spray manipulator.

Dedicated to strict quality control and thoughtful customer service, our experienced staff members are always available to discuss your requirements and ensure full customer satisfaction by supplying air and gas. CHINAMFG company not only has its own import and export right and stable distributors worldwide, but also has a team of professional after sales and service. In addition, we have obtained CE, TUV, SGS, ISO certificates.
After long-term development, our company has established 2 wellknown brands: CHINAMFG and TUOWEl.
 In domestic market, our CHINAMFG brand of screw air compressors and wet spray manipulators are CHINAMFG in tunnel industry. with cooperation of China Railway Bureau Group Co, Ltd, and also formed a long-term strategic partnership with China Railwaywith (the first) Bureau Group Co, Ltd to China Railway(the tenth) Bureau Group Co., Ltd.
Selling well in all cities and provinces around China, our products are also exported to clients in many countries and regions, such as, Russia, Thailand, Vietnam, Indonesia, South Africa, Tunisia, Saudi Arabia, Uzbekistan, Danmark, Poland, Mexico, Chile, Peru, India, Pakistan, Malaysia, etc.
Our products gain wide praises at home and abroad. We also welcome OEM, ODM orders. As a supplier, CHINAMFG has its own factory, covers an area of 10,000 square meters, with 500 sets output of screw air compressors and 100 sets of oxygen generators per month, with 5 engineers in technical dept, and more than 100 workers.
Whether selecting a current product from our catalog or seeking engineering assistance for your application, you can email or phone us about your sourcing requirements. We warmly welcome customers all over the world to establish cooperation and create a bright future with us together.

FAQ

Q1: What is the rotor speed for the air end?

A1: 2980rmp.

Q2: What’s your lead time?
A2: usually, 5-7 days. (OEM orders: 15days)

Q3: Can you offer water cooled air compressor?
A3: Yes, we can (normally, air cooled type).

Q4: What’s the payment term?
A4: T/T, L/C, Western Union, etc. Also we could accept USD, RMB, and other currency.

Q5: Do you accept customized voltage?
A5: Yes. 380V/50Hz/3ph, 380V/60Hz/3ph, 220V/50Hz/3ph, 220V/60Hz/3ph, 440V/50Hz/3ph, 440V/60Hz/3ph, or as per your requests.

Q6: What is your warranty for air compressor?
A6: One year for the whole air compressor(not including the consumption spare parts) and technical supports can be provided according to your needs.

Q7: Can you accept OEM orders?
A7: Yes, OEM orders are warmly welcome.

Q8: How about your customer service and after-sales service?
A8: 24hrs on-line support, 48hrs problem solved promise.

Q9: Do you have spare parts in stock?
A9: Yes, we do.

Q10: What kind of initial lubrication oil you used in air compressor?
A10: TOTAL 46# mineral oil.

 

After-sales Service: Online Technical Support
Warranty: 1 Year Warranty for The Whole Machine
Installation Type: Stationary Type
Lubrication Style: Oil-free
Cylinder Position: Vertical
Application: Medical, Food, Dental, Lab, Bio-Fermentation
Samples:
US$ 2700/Piece
1 Piece(Min.Order)

|
Request Sample

Customization:
Available

|

air compressor

How are air compressors utilized in the aerospace industry?

Air compressors play a crucial role in various applications within the aerospace industry. They are utilized for a wide range of tasks that require compressed air or gas. Here are some key uses of air compressors in the aerospace industry:

1. Aircraft Systems:

Air compressors are used in aircraft systems to provide compressed air for various functions. They supply compressed air for pneumatic systems, such as landing gear operation, braking systems, wing flap control, and flight control surfaces. Compressed air is also utilized for starting aircraft engines and for cabin pressurization and air conditioning systems.

2. Ground Support Equipment:

Air compressors are employed in ground support equipment used in the aerospace industry. They provide compressed air for tasks such as inflating aircraft tires, operating pneumatic tools for maintenance and repair, and powering air-driven systems for fueling, lubrication, and hydraulic operations.

3. Component Testing:

Air compressors are utilized in component testing within the aerospace industry. They supply compressed air for testing and calibrating various aircraft components, such as valves, actuators, pressure sensors, pneumatic switches, and control systems. Compressed air is used to simulate operating conditions and evaluate the performance and reliability of these components.

4. Airborne Systems:

In certain aircraft, air compressors are employed for specific airborne systems. For example, in military aircraft, air compressors are used for air-to-air refueling systems, where compressed air is utilized to transfer fuel between aircraft in mid-air. Compressed air is also employed in aircraft de-icing systems, where it is used to inflate inflatable de-icing boots on the wing surfaces to remove ice accumulation during flight.

5. Environmental Control Systems:

Air compressors play a critical role in the environmental control systems of aircraft. They supply compressed air for air conditioning, ventilation, and pressurization systems, ensuring a comfortable and controlled environment inside the aircraft cabin. Compressed air is used to cool and circulate air, maintain desired cabin pressure, and control humidity levels.

6. Engine Testing:

In the aerospace industry, air compressors are utilized for engine testing purposes. They provide compressed air for engine test cells, where aircraft engines are tested for performance, efficiency, and durability. Compressed air is used to simulate different operating conditions and loads on the engine, allowing engineers to assess its performance and make necessary adjustments or improvements.

7. Oxygen Systems:

In aircraft, air compressors are involved in the production of medical-grade oxygen for onboard oxygen systems. Compressed air is passed through molecular sieve beds or other oxygen concentrator systems to separate oxygen from other components of air. The generated oxygen is then supplied to the onboard oxygen systems, ensuring a sufficient and continuous supply of breathable oxygen for passengers and crew at high altitudes.

It is important to note that air compressors used in the aerospace industry must meet stringent quality and safety standards. They need to be reliable, efficient, and capable of operating under demanding conditions to ensure the safety and performance of aircraft systems.

air compressor

Can air compressors be used for medical and dental applications?

Yes, air compressors can be used for various medical and dental applications. Compressed air is a reliable and versatile utility in healthcare settings, providing power for numerous devices and procedures. Here are some common applications of air compressors in medical and dental fields:

1. Dental Tools:

Air compressors power a wide range of dental tools and equipment, such as dental handpieces, air syringes, air scalers, and air abrasion devices. These tools rely on compressed air to generate the necessary force and airflow for effective dental procedures.

2. Medical Devices:

Compressed air is used in various medical devices and equipment. For example, ventilators and anesthesia machines utilize compressed air to deliver oxygen and other gases to patients. Nebulizers, used for respiratory treatments, also rely on compressed air to convert liquid medications into a fine mist for inhalation.

3. Laboratory Applications:

Air compressors are used in medical and dental laboratories for various purposes. They power laboratory instruments, such as air-driven centrifuges and sample preparation equipment. Compressed air is also used for pneumatic controls and automation systems in lab equipment.

4. Surgical Tools:

In surgical settings, compressed air is employed to power specialized surgical tools. High-speed air-driven surgical drills, saws, and bone-cutting instruments are commonly used in orthopedic and maxillofacial procedures. Compressed air ensures precise control and efficiency during surgical interventions.

5. Sterilization and Autoclaves:

Compressed air is essential for operating sterilization equipment and autoclaves. Autoclaves use steam generated by compressed air to sterilize medical instruments, equipment, and supplies. The pressurized steam provides effective disinfection and ensures compliance with rigorous hygiene standards.

6. Dental Air Compressors:

Specialized dental air compressors are designed specifically for dental applications. These compressors have features such as moisture separators, filters, and noise reduction mechanisms to meet the specific requirements of dental practices.

7. Air Quality Standards:

In medical and dental applications, maintaining air quality is crucial. Compressed air used in healthcare settings must meet specific purity standards. This often requires the use of air treatment systems, such as filters, dryers, and condensate management, to ensure the removal of contaminants and moisture.

8. Compliance and Regulations:

Medical and dental facilities must comply with applicable regulations and guidelines regarding the use of compressed air. These regulations may include requirements for air quality, maintenance and testing procedures, and documentation of system performance.

It is important to note that medical and dental applications have specific requirements and standards. Therefore, it is essential to choose air compressors and associated equipment that meet the necessary specifications and comply with industry regulations.

air compressor

What maintenance is required for air compressors?

Maintaining air compressors is essential to ensure their optimal performance, longevity, and safe operation. Regular maintenance helps prevent breakdowns, improves efficiency, and reduces the risk of accidents. Here are some key maintenance tasks for air compressors:

1. Regular Inspection: Perform visual inspections of the air compressor to identify any signs of wear, damage, or leaks. Inspect the compressor, hoses, fittings, and connections for any abnormalities. Pay attention to oil leaks, loose bolts, and worn-out components.

2. Oil Changes: If your air compressor has an oil lubrication system, regular oil changes are crucial. Follow the manufacturer’s recommendations for the frequency of oil changes and use the recommended oil type. Dirty or degraded oil can impact compressor performance and lead to premature wear.

3. Air Filter Cleaning or Replacement: Clean or replace the air filter regularly to ensure proper air intake and prevent contaminants from entering the compressor. Clogged or dirty filters can restrict airflow and reduce efficiency.

4. Drain Moisture: Air compressors produce moisture as a byproduct of the compression process. Accumulated moisture in the tank can lead to rust and corrosion. Drain the moisture regularly from the tank to prevent damage. Some compressors have automatic drains, while others require manual draining.

5. Belt Inspection and Adjustment: If your compressor has a belt-driven system, inspect the belts for signs of wear, cracks, or tension issues. Adjust or replace the belts as necessary to maintain proper tension and power transmission.

6. Tank Inspection: Inspect the compressor tank for any signs of corrosion, dents, or structural issues. A damaged tank can be hazardous and should be repaired or replaced promptly.

7. Valve Maintenance: Check the safety valves, pressure relief valves, and other valves regularly to ensure they are functioning correctly. Test the valves periodically to verify their proper operation.

8. Motor and Electrical Components: Inspect the motor and electrical components for any signs of damage or overheating. Check electrical connections for tightness and ensure proper grounding.

9. Keep the Area Clean: Maintain a clean and debris-free area around the compressor. Remove any dirt, dust, or obstructions that can hinder the compressor’s performance or cause overheating.

10. Follow Manufacturer’s Guidelines: Always refer to the manufacturer’s manual for specific maintenance instructions and recommended service intervals for your air compressor model. They provide valuable information on maintenance tasks, lubrication requirements, and safety precautions.

Regular maintenance is vital to keep your air compressor in optimal condition and extend its lifespan. It’s also important to note that maintenance requirements may vary depending on the type, size, and usage of the compressor. By following a comprehensive maintenance routine, you can ensure the reliable operation of your air compressor and maximize its efficiency and longevity.

China Hot selling 3kw 4HP 220V Single Phase Oil Free Small Rotary Scroll Type Air Compressor Machine Price for Home Industrial Workshop Shop   supplier China Hot selling 3kw 4HP 220V Single Phase Oil Free Small Rotary Scroll Type Air Compressor Machine Price for Home Industrial Workshop Shop   supplier
editor by CX 2023-09-28

China Good quality 5.5kw Oil-Free Scroll Air Compressor for Bio-Fermentation of Quiet Environmental Protection with Best Sales

Product Description

Model HK-D06/08-A4
Operation control mode Pressure start and stop
Rated pressure             (MPa) 0.8
Maximum pressure         ( MPa) 1.0
Air flow                 (M³/min) 0.6
Running speed             ( R/min) 3050
Drive mode Belt drive
Exhaust air temperature      ( ºC  ) ≤ambient temperature  
 
 

Lubrication Style: Oil Free
Cooling System: Air Cooling
Power Source: AC Power
Cylinder Position: Vertical
Structure Type: Closed Type
Installation Type: Stationary Type

air-compressor

what to see in an air compressor

If you need to buy an air compressor, you should know what to look for. The types of air compressors on the market are classified according to their CFM rating, safety devices, and pumps. There are several differences between lubricated and oil-free air compressors that you should know before buying. To better understand the difference between these types of air compressors, read on. This article will guide you through these differences.

Pump

If you are looking for a quality air compressor, you have come to the right place. A good air compressor pump will provide high pressure for anything from tires to boats and more. There are hundreds of different models to choose from, and the great thing about buying one from a Chinese manufacturer is that they have so many options. More importantly, Chinese manufacturers can customize air equipment such as air compressors at low prices.
A good quality air pump won’t break easily, but you’ll be able to use it for years. Choosing a high-quality pump will help you avoid many hassles on the road, such as unplanned downtime and installation costs. Plus, a pump from the same manufacturer as your air compressor is your best bet to ensure optimum performance. Listed below are some tips for finding a quality pump for your air compressor.
The air compressor is an important but unremarkable invention. Without them, our lives would be completely different. Without a pump, we can’t get hot water from central heating, nor can we get heat from the refrigerator. We can’t inflate bicycle tires, and we can’t refuel cars. Pumps are vital to all kinds of machines. So why is it important to choose the right product? The answer may surprise you.
Different types of pumps are used for different applications. Positive displacement pumps move a fixed volume of fluid and direct it to a drain. This design ensures constant flow at a constant speed regardless of discharge pressure. Centrifugal pumps work differently. The impeller accelerates the fluid, converting the input energy into kinetic energy. This type of pump is most commonly used in mines, air conditioning, industrial plants, and flood control.

safety equipment

There are several safety features you should check when using an air compressor. First, check the connection of the air filter to the air. If they come loose, parts may separate and cause injury. Another important safety feature is the shut-off valve. When working near compressed air, the shut-off valve should be within easy reach and visibility. Moving parts and other equipment must be protected with protective covers. Check safety valve and replace damaged parts.
Rupture discs are copper discs located on the air cooler. When the air pressure exceeds a certain limit, it bursts. Fusible plugs contain materials that melt at high temperatures. The compressor should have a lubricating oil pressure alarm and cut off the trip signal. If these two safety devices fail, the compressor should be stopped immediately. The rupture disc should be inspected at least weekly to ensure it does not rupture under pressure.
If the pressure level is too high, and overcurrent protection device cuts power to the motor. It also automatically shuts off the compressor when the hose ruptures or the air volume exceeds a preset level. The device should be installed on the air compressor to prevent accidents. Its job is to protect the operator from harm. If employees do not follow these safety measures, they may cause equipment damage.
To ensure safety when operating the air compressor, safety glasses and gloves should be worn. Pressurized air can cause eye injury, and crash goggles can provide a barrier to prevent this. Additionally, the self-retracting cord prevents trip hazards and reinforces excess cord. You should also keep your hands and body away from the air nozzle. This will prevent you from being sprayed with compressed air.

CFM Rating

An air compressor’s PSI and CFM ratings indicate the pressure and volume it can deliver. PSI stands for pounds per square inch and measures the force and pressure contained in one square inch of air. These two indicators are equally important when choosing an air compressor. If you need a lot of compressed air for a specific application, you will need a higher psi compressor. Likewise, if you are using compressed air in a smaller application, a low cfm compressor will not provide enough power to meet your needs.
When comparing different air compressors, be sure to pay close attention to horsepower and CFM ratings. While compressor power is essential for some tasks, it is not the most important aspect. The CFM rating of an air compressor will determine how big a project it can handle and how long it takes to charge. Make sure you understand the CFM and PSI ratings of your future compressors, as not knowing these important statistics can frustrate you and drive up costs.
In general, it is best to choose an air compressor with a CFM rating higher than the size of the air tool. This will ensure that the air compressor has enough pressure to work multiple tools efficiently at the same time. While smaller CFM ratings may be sufficient for smaller projects, larger tools such as drills require a lot of air. Therefore, the higher the CFM, the larger and more powerful the tool.
Once you understand the CFM of an air compressor, you can start looking for the right tool. You can check the CFM rating of your air compressor online by commenting below. If you’re not sure about the size of your air tool, you can always buy a second air compressor. This is a great way to double the CFM of your air compressor! You’ll have more air to do more work, and your compressor will last longer.
air-compressor

Lack of oil and lubrication

Oil-free air compressors have a smaller footprint and require less maintenance than oil-lubricated air compressors. Although oil-lubricated air compressors are more expensive and heavier than oil-free air compressors, they are also ideal for stationary use. The benefits of oil-free air compressors include greater durability and lower maintenance costs. The advantages and disadvantages of each type are discussed below.
Oil-free air compressors are generally quieter than oil-lubricated air compressors. However, you may still experience some noise while using it. To avoid this, you should choose a quiet intake compressor. However, if you work next to a noisy compressor, you should buy a muffler, an aftermarket filter that reduces compressor noise.
If you want to use the air compressor for a long time, the oil-free model is not the right choice. Its Teflon coating wears off over time, especially at extreme temperatures. Additionally, oil-free air compressors have a large number of moving parts that require regular maintenance, while oil-filled air compressors are great for those who don’t want to invest in extra parts.
Another major difference between oil-free and oil-lubricated air compressors is lubrication. Oil-lubricated air compressors require regular lubrication whereas oil-free air compressors are pre-lubricated. They have fewer parts and are cheaper. Oil-free air compressors are lighter than oil-lubricated air compressors. In addition to being more affordable, oil-free air compressors are more powerful and durable.
While oil-filled air compressors are more efficient and durable, they generate a lot of heat. However, they are also more expensive and require regular oil changes. Furthermore, they are difficult to transport. They also need to be permanently installed. These air compressors are also not portable and require a fixed location. So, consider your needs before deciding which type is best for you. When you’re choosing an air compressor for your business, be sure to shop around.
air-compressor

noise level

If you are wondering what the noise level of an air compressor is, the answer depends on your specific equipment and working environment conditions. Typically, air compressors produce 40 to 90 decibels of noise. Although the lower the decibel level, the quieter the compressor will be. Larger, more powerful air compressors produce higher noise levels than their little brothers. But no matter how big the air compressors are, it’s a good idea to wear hearing protection while working around them.
When purchasing a new air compressor, the noise level of the air compressor should be considered. While this may seem like a small problem, there are actually a lot of variations on these noisy machines. The most common type of air compressor is the reciprocating piston pump. This model uses pistons similar to an engine to rotate inside a chamber. The piston moves quickly and traps air proportional to its size. Single-piston air compressors are generally noisier than twin-piston models, also known as twin cylinders.
But even if you have the proper equipment to protect your hearing, it’s still important to know the noise level of an air compressor. Even if the noise is not immediately dangerous, it can still cause temporary or permanent hearing loss. This condition is called noise-induced hearing loss, and an air compressor with a sound level of 80 or higher can cause permanent hearing damage. You can avoid potential damage to your hearing and prevent accidents by simply paying attention to the noise level of your air compressor.
Air compressors are inherently noisy, but if you take steps to reduce their noise levels, you can minimize disruption to neighbors and co-workers. For example, installing a sound enclosure in your work area can prevent your air compressor from making as much noise as before. Depending on your workspace, you can also try installing a long air hose, which will reduce sound levels by up to 25%.
China Good quality 5.5kw Oil-Free Scroll Air Compressor for Bio-Fermentation of Quiet Environmental Protection   with Best SalesChina Good quality 5.5kw Oil-Free Scroll Air Compressor for Bio-Fermentation of Quiet Environmental Protection   with Best Sales
editor by CX 2023-06-13

China 100 1500cfm Screw 500 1000 L Scroll 270 cfm Piston 10 25 Bar Diesel Oil Free Air Compressor with Best Sales

Error:获取session失败,

air-compressor

A Buyer’s Guide to Air Compressor Types

There are many types of Air Compressors, and it’s important to understand what each type has to offer. In this article, we’ll discuss single stage air compressors, low-noise compressors, and models with two pistons. But, before you buy an Air Compressor, be sure to read our buyer’s guide to the various types. This way, you’ll have all of the information you need to make the right decision for your business.

Single-stage air compressors

A single-stage air compressor is an excellent choice for most general-purpose purposes. They provide enough power to operate pneumatic tools, and they produce less heat. Single-stage air compressors, however, are not suitable for heavy-duty industrial uses. However, they can be used in various applications, including auto shops, gas stations, and various manufacturing facilities. They are also suitable for borewells and other high-pressure places.
These air compressors are a great choice for home use and are suitable for small-scale businesses, contractors, and small shops. These compressors have continuous duty cycles, cast iron compressor pumps, and a minimum 5,000-hour pump life. They also feature advanced features, including ODP motors, Auto Start & Controls, Receiver tanks, and power cords. They have low maintenance and can save you a great deal of money.
Single-stage air compressors are generally less expensive and lighter than their two-stage counterparts. Single-stage air compressors are also more portable, which is a plus for small projects. While two-stage compressors offer higher CFM, they are more powerful and bulky, making them unsuitable for small or home use. So it is essential to determine what you will use the air compressor for and decide on a model based on your needs.
A single-stage air compressor is made of a piston and a tank. The piston moves rapidly inside the cylinder and exerts pressure on the cylinder. This means that the piston can’t move any faster than the air pressure outside the cylinder. The piston is designed to operate in the same way for each stage. This is a great choice for home shops and one-man automotive shops, as it allows you to control the pressure without sacrificing the pump’s life.
Single-stage air compressors are often cheaper than two-stage versions, but they are not the best choice for every application. If you are only using your air compressor occasionally, you’ll find a one-stage model to be much more reliable than a two-stage model. The main difference between the two types of compressors is in the amount of air that each stage compresses. A two-stage air compressor will have more air storage capacity, but it will still produce more pressure.

Rotary vane compressors

Rotary vane compressors use a centrifugal pump to compress air. The rotor is set eccentrically in the housing, which almost touches the vane. As the rotor turns, the air that enters the pump is trapped between the vanes. This compressed air undergoes compression as the rotor rotates. Vanes are small pieces of carbon fiber or graphite composite. Vanes may be made of different materials depending on the application.
While rotary vane pumps are not commonly used to produce compressed air, they are widely used in automotive and hydraulic applications. Chances are, you have used a rotary vane pump at some point in your life. These pumps are also common in the vacuum and compressed air industries. As a result, many people don’t realize that they’re still around. They feature slots that allow the vanes to slide in and out of the rotor.
A rotary vane compressor has a drum and rotor inside. The rotor is eccentrically positioned and has slots and grooves on its surface. Its inlet and outlet ports are situated off-center, allowing the vanes to be pushed out by centrifugal force. Because the rotor rotates so quickly, air is trapped between the vanes. This air then becomes pressurized by the rotating rotor.
Rotating vane compressors can be easily serviced and repaired. A simple replacement of carbon vanes requires just 15 minutes and common tools. The carbon vanes typically last nine to eighteen months, depending on system operating pressure. Before purchasing a rotary vane compressor, make sure to check whether it has been properly performance-tested and has a warranty. Generally, warranties cover the rotor/stator chambers but do not cover the vanes or air filters. You should also check if the unit is covered by a lightning or water damage warranty.
Rotary vane compressors are an integral part of manufacturing industries. Many pharmaceutical manufacturing facilities depend on rotary vane compressors to control their equipment. Other industries that use rotary vane compressors include the plastics, woodworking, natural gas, and medical & dental fields. Their benefits are numerous and far outweigh any disadvantages of rotary screw compressors. For example, a rotary vane compressor can double the life of a conventional compressor.
air-compressor

Rotary vane compressors with low-noise models

If you are looking for a rotary vane air compressor, you have come to the right place. CZPT’s LV Series rotary vane compressors offer low-noise models, compact size, and robust integration. In addition to their low-noise features, they feature large filter systems to deliver high-quality compressed air. The LV Series models also feature CZPT’s reputation for reliability and quality.
This type of compressor uses centrifugal force to operate and is limited in its top and minimum operating speeds. They are only a third as powerful as screw compressors, and their top speed limits are much lower. Furthermore, the vanes wear out easily at high speeds because there is not enough centrifugal force to seal them against the cylinder’s edges. Even at half their full capacity, they consume as much as 80% of their total energy rating.
Because piston compressors produce a lot of noise, factory owners and shop owners have begun to install noise-dampening cabinets and other solutions. But, rotary vane compressors produce far less noise than a traditional vacuum, and the maintenance costs are also low. Rotary vane compressors are also extremely helpful in several industries. They are used in the automotive and auto finishing industries, as well as in dairy industries and milking machines.
If you have a deep pond, a rotary vane air compressor kit can pump up to 20 feet of water. This is more than enough airflow for two to five diffusers. A 1/4 HP rotary vane kit pumps around 4.2 CFM. It also helps to increase circulation and oxygen levels in the pond. Finally, a 1/4 HP kit offers the necessary power to clean up the bottom of a pond.
The rotary vane and rotary screw are the most popular air compressors today. While they are similar in many ways, they are more versatile and durable than their counterparts. They use fewer angular contact ball bearings and require less frequent maintenance than piston air compressors. Compared to piston air compressors, rotary vane and rotary screw compressors are quieter and are less expensive.
air-compressor

Rotary vane compressors with two pistons

The rotary vane and rotary screw compressors are similar in application, but both have different advantages and disadvantages. This article will compare the benefits of each and highlight the differences between them. While both are commonly used in industrial applications, rotary vane compressors are preferred by many industries. These compressors also have a wide range of uses, ranging from automotive air tool operation to milking machines. These compressors also have the advantage of being quieter than piston-powered ones.
The current common rail position may not be suitable for pressure swirl injectors, but new positions have been tested and show improvements in specific energy values. Moreover, the current position is not required for external oil pumps. However, mass induction and expulsion have to be performed with utmost care. This article focuses on the design and efficiency of rotary vane compressors. You can find more information about this new design in the references mentioned below.
The advantages of this type of compressor are its low cost, compact size, and easy maintenance. Hence, they are preferred in low capacity applications. Moreover, they feature integrated vanes. The rotating vanes close the air gap and compress air towards the outlet. Compared to piston-powered compressors, these units are cheaper and more reliable. Therefore, you should choose one with the lowest price tag. You can also opt for rotary vane compressors that are oil-free.
Sliding vane compressors are another popular variant. They have a single cylinder connected to the compressor and are capable of operating at low speeds. This design also reduces the amount of friction and maintains volumetric efficiency. However, the sliding vane compressors suffer from high frictional losses. If you are looking for a more efficient rotary compressor, this is the best option. While sliding vane compressors have been in the spotlight for over a century, they are still quite young.
These compressors are easy to install and maintain. They are also quieter than piston compressors. They are also cheaper than piston-driven compressors. The energy efficiency and low price make them the perfect choice for any commercial or industrial application. If you’re looking for a small, compact compressor, the rotary vane has been proven to be the best choice for your needs. You should know that it has a long service life.

China 100 1500cfm Screw 500 1000 L Scroll 270 cfm Piston 10 25 Bar Diesel Oil Free Air Compressor     with Best SalesChina 100 1500cfm Screw 500 1000 L Scroll 270 cfm Piston 10 25 Bar Diesel Oil Free Air Compressor     with Best Sales
editor by CX 2023-04-27

China high quality New 2020 SCR30xa Oil-Free Scroll Air Compressor for Medical Ventilator with Great quality

Merchandise Description

Product Technological Description

Product Features

1.1.Large quanlity oild free compressed air.
two.Higher effectiveness oil free scroll airend.
3.Lower CZPT Usage,Reduced operating,servicing value.
4.Aptitude and intelligent Manage, integrated contact-monitor PLC displayer.
five.Special protected units make entire compressor far more security, far more stable,lest noise,lest CZPT Decline.
6.Easy to put in,run,keep.

Higher top quality oil charge compressed air:
A substantial quality seventy four Diploma taper connection is used creating a more reliable seal minimizing the danger of air leakage. SCR’s oil cost-free scroll device offers one hundred% oil free air and makes use of entirely stainless steel pipework eliminating any attainable contamination.

Higher Effectiveness oil cost-free scroll airend:
SCR use a planet-renowned scroll airend in the XA variety for enhanced reliability. The compression chamber and CZPT system is 100% separated indicating there is no chance of oil contaminated air.

Substantial Dependability:
The XA range use low sound, higher stress centrifugal fans which supplies outstanding air circulation. The outsized cooler has spare capacity of amongst twenty%-thirty% producing the air outlet temperature only +ten-fifteen levels previously mentioned the ambient tempera-ture. This decreases the load of downstream products.

Solution Classes

Benefits

Application

About SCR

FAQ

Make contact with us

Organization Title: ZheJiang Screw Compressor Co., Ltd
Contact Man or woman: Vincent Sunlight
 

If you are intrigued in any of our items,remember to feel totally free to speak to us.We are searching forward to cooperating,growing and creating with your sincerely.

 

What to Look For When Purchasing an Air Compressor

An air compressor is a quite useful instrument that can support you full many various types of development jobs. This helpful machine makes numerous duties a lot less complicated, but not all of them are produced equally. Understanding what to appear for when acquiring an air compressor will assist you make an educated selection. Below are some of the items you need to look for. These include cost, size, and power effectiveness. Also, make sure to think about the air compressor’s kind.
air-compressor

Single-stage air compressors are quieter

When it will come to noise amount, solitary-stage air compressors are the way to go. These devices have much less shifting parts and are quieter than two-phase types. One-phase air compressors use an axial stream style and can be quieter than their dual-stage counterparts. Solitary-phase air compressors can operate lengthier and at reduced pressures. Single-stage air compressors can be employed for light-weight industrial apps. They have a extended daily life expectancy, with some versions lasting for over three thousand hrs.
Whilst some solitary-stage air compressors are quieter than two-stage air compressors, equally designs have noise-reduction functions. 1 variety functions rubber elements, which are made to dampen sound. One more characteristic helps make a compressor quieter: its area close to the task site. Some models function rubber foundation plugs and rubber mats to lessen flooring vibrations. In addition to utilizing these characteristics, one-stage compressors are less complicated to transport.
Noise stages are important when choosing an air compressor. Some equipment are way too noisy for comfy function, and some companies don’t want to expose customers to sounds-creating air compressors. Other noise ranges can even endanger workers’ health. Single-stage air compressors are far more inexpensive than twin-phase compressors. They are also quieter and a lot more powerful. But be prepared for the sound. Some single-phase air compressors are nevertheless noisy.
In contrast to their two-stage counterparts, solitary-phase compressors are quieter when working at full capacity. Even so, double-phase compressors are quieter on low capacities than single-stage models. People with variable pace are quietest at reduce capacities. The difference is about 10db. If you might be involved about the sound degree, you need to take into account a two-stage air compressor. But if you have a small workshop, it may possibly not be suitable for you.
A single-phase air compressors are typically much more effective than two-stage air compressors. The sounds from a two-phase air compressor is lower because you will find no intermediate phase. One-phase air compressors also use a piston that rotates in a solitary stage, even though dual-stage air compressors, also known as duplex versions, are more effective. A one-phase air compressor is quieter, but double-phase compressors are louder.
air-compressor

Two-stage air compressors are a lot more energy efficient

Two-phase air compressors are more power-effective than single-phase machines. The performance of two-stage air compressors is increased via a blend of improved effectiveness and improved longevity. These machines can shop much more air and have higher compression ratios. One product of a two-phase compressor can maintain about eighty three cubic ft of air at one hundred PSI and 120 cubic feet at a hundred and fifty PSI. A two-phase compressor is also quieter.
Two-stage air compressors are more vitality-effective due to the fact they have two pistons instead of one particular. These air compressors obtain a increased force ranking and recuperate more quickly. This kind of compressor is perfect for employment that demand substantial air strain for a extended interval of time. In addition, they can run a number of equipment at the same time. This helps make them better for business and industrial use. Outlined under are some positive aspects of two-phase air compressors.
One-phase air compressors can power resources in the garage or kitchen area, but they are not as reliable for industrial applications. One-phase compressors have greater areas that are likely to knowledge condensation. Furthermore, solitary-phase compressors do not very last long in steady use and are less energy-efficient than two-phase types. Regardless of whether you’re utilizing the compressor for a single tradesperson, a little crew, or a huge development crew, two-stage compressors are the very best choice.
Solitary-stage air compressors are frequently employed in tiny-scale foods preparing and generation. One-phase air compressors are easy to transport in between places, and can be plugged into numerous electrical outlets. One-stage compressors are also best for higher-quantity foods processing. A dual-phase air compressor is excellent for industrial use. In some instances, you can even shift the single-stage air compressor between two-stage air compressors.
One-phase compressors frequently cycle way too speedily, drawing far more electrical energy than two-phase units. A variable velocity unit stays on a minimal speed for hrs at a time. One-phase air conditioners power you to lower your thermostat settings although single-stage air conditioners operate way too usually. Each models are vitality-efficient but they are not as energy-effective as variable-speed compressors. The primary variation is that solitary-phase air conditioners tend to drain the electrical power source faster.

Piston-pushed air compressors are quieter

A piston-pushed air compressor is a single of the quietest varieties of air compressors. It is less noisy than reciprocating air compressors. A piston-driven air compressor can get to sixty two decibels, whilst a scroll compressor is close to half that quantity. The two principal elements of a scroll air compressor are the piston and the helical screw. These air compressors are equally really effective and silent.
More mature compressors are amazingly noisy. They make a “wumpa” sound similar to a massive motor. They are also capable of producing a substantial-pitched whine. These noises can be deafening, specially in a little workshop. Which is why it is vital to appear for a peaceful compressor. But what can make a compressor silent? Read on to learn more about this vital resource.
One more distinction in between piston-driven air compressors and electrical-driven air compressors is the power supply. Electric air compressors produce much less sound than gasoline-powered compressors, which use an engine. Piston-pushed air compressors are also more efficient. They also generate considerably less heat, producing them an excellent selection for places of work and other settings where noise is a difficulty. The best way to choose amongst the two sorts of air compressors is to examine the manufacturer’s warranty and go through the ‘Description’.
Noise reduction is the first priority of a compressor’s owner, so make positive that you have the right product. If you might be operating on one thing delicate, will not location the compressor too shut to a constructing exactly where people may possibly be nearby. Sounds can be quite disruptive to the workspace and can trigger overall health troubles. To support combat sounds, you may need to get a silent air compressor. And don’t fail to remember to contemplate its place: Piston-pushed air compressors are quieter than their reciprocating counterparts.
Piston-pushed air compressors are tranquil simply because the piston is produced of slim metal and a lot more rubber, which absorbs the sound. Not like reciprocating air compressors, piston-driven air compressors are more successful than their twin-piston cousins, which are quieter and a lot more effective. So which sort is proper for you? Consider a search at some of the primary variances between the two. If you want a peaceful compressor, make certain it satisfies the specifications essential by the task you are doing work on.
air-compressor

Oil-lubricated air compressors are far more price-successful

There are numerous factors why oil-lubricated air compressors are a lot more expensive than dry-variety air compressors. First of all, oil-lubricated air compressors are inclined to be far more dependable and quiet. Moreover, oil-lubricated air compressors require much less areas and can last more time than dry-kind air compressors. These are just a few of the many positive aspects of making use of oil-lubricated air compressors.
Oil-totally free air compressors have some drawbacks. They are considerably less sturdy and may possibly not be as effective as oil-lubricated models. Additionally, simply because oil-lubricated air compressors use oil, they can get extremely noisy. While they are considerably less costly, they are not the ideal choice for weighty-responsibility operate. Nevertheless, contemporary oil-cost-free air compressors have soundproofing and are ideal for industrial use.
When getting an oil-lubricated air compressor, make confident to pick 1 with a tank ability that fulfills your needs and your space. More substantial tanks can be far more expensive than tiny tanks, but bigger models are less complicated to go about. Also, be confident to take into account the weight and dimensions of the portable air compressors when producing your selection. If the fat is also big, you could have difficulties carrying it from location to area.
Another gain of using oil-lubricated air compressors is their decreased need for oil. These versions can final up to a decade lengthier than oil-free counterparts. Oil-free of charge air compressors are a lot more inexpensive and can attain the same large efficiency as their oil-lubricated counterparts. Many industrial programs reward from these air compressors. So, which 1 is correct for you? We have outlined a couple of of them beneath.
One more gain of choosing an oil-lubricated air compressor is the decreased price of routine maintenance. This variety is a lot more resilient than its oil-lubricated counterparts, which need standard oil alterations to keep them running efficiently. Nevertheless, it is not feasible to transportation an oil-lubricated compressor, which means that you should put in it permanently to maintain it functioning effectively. In addition, these air compressors are hard to move and are not portable, which can restrict your capacity to use it in a pinch.

China high quality New 2020 SCR30xa Oil-Free Scroll Air Compressor for Medical Ventilator     with Great qualityChina high quality New 2020 SCR30xa Oil-Free Scroll Air Compressor for Medical Ventilator     with Great quality

China high quality SCR30xa Silent Oil-Free Scroll Air Compressor near me shop

Product Description

Solution Technical Description

Item Attributes

one.1.Higher quanlity oild cost-free compressed air.
two.Higher efficiency oil totally free scroll airend.
3.Low Power Use,Reduced running,routine maintenance value.
four.Aptitude and smart Handle, built-in contact-screen PLC displayer.
5.Distinctive protected models make entire compressor far more security, more steady,lest sounds,lest strength Loss.
6.Easy to install,run,keep.

High high quality oil payment compressed air:
A substantial high quality 74 Diploma taper link is employed creating a much more reliable seal lowering the threat of air leakage. SCR’s oil cost-free scroll device supplies one hundred% oil free of charge air and makes use of fully stainless metal pipework eliminating any feasible contamination.

Higher Efficiency oil free of charge scroll airend:
SCR use a world-renowned scroll airend in the XA range for increased reliability. The compression chamber and CZPT method is a hundred% separated meaning there is no threat of oil contaminated air.

Substantial Dependability:
The XA assortment use low noise, higher stress centrifugal followers which provides superb air stream. The oversized cooler has spare potential of between 20%-thirty% making the air outlet temperature only +10-15 degrees over the ambient tempera-ture. This decreases the stress of downstream gear.

Merchandise Classes

Positive aspects

Application

About SCR

FAQ

Speak to us

Firm Title: ZheJiang Screw Compressor Co., Ltd
Make contact with Person: Vincent Sunshine
 

If you are fascinated in any of our merchandise,you should really feel totally free to contact us.We are looking ahead to cooperating,growing and building with your sincerely.

 

What to Seem For When Getting an Air Compressor

An air compressor is a quite useful resource that can support you complete many diverse varieties of building employment. This handy equipment can make several jobs much less difficult, but not all of them are created similarly. Comprehending what to look for when getting an air compressor will help you make an educated choice. Below are some of the factors you should look for. These incorporate value, size, and power effectiveness. Also, make certain to think about the air compressor’s variety.
air-compressor

One-stage air compressors are quieter

When it arrives to sounds level, single-stage air compressors are the way to go. These devices have much less transferring areas and are quieter than two-phase versions. Single-phase air compressors use an axial stream design and can be quieter than their twin-phase counterparts. Solitary-stage air compressors can operate more time and at reduce pressures. Solitary-phase air compressors can be utilized for mild industrial purposes. They have a lengthy existence expectancy, with some models long lasting for more than a few thousand hrs.
Even though some one-stage air compressors are quieter than two-stage air compressors, the two designs have sounds-reduction characteristics. 1 kind characteristics rubber areas, which are made to dampen sound. An additional function tends to make a compressor quieter: its place around the work web site. Some designs feature rubber foundation plugs and rubber mats to minimize ground vibrations. In addition to making use of these features, single-stage compressors are simpler to transportation.
Sounds levels are essential when deciding on an air compressor. Some machines are also noisy for cozy operate, and some businesses never want to expose clients to sounds-generating air compressors. Other sounds stages can even endanger workers’ health. Single-stage air compressors are a lot more cost-effective than dual-stage compressors. They are also quieter and a lot more powerful. But be well prepared for the sound. Some one-stage air compressors are nonetheless noisy.
Compared to their two-stage counterparts, solitary-stage compressors are quieter when operating at full potential. Nevertheless, double-stage compressors are quieter on low capacities than single-stage models. People with variable speed are quietest at lower capacities. The distinction is about 10db. If you are involved about the noise amount, you ought to consider a two-phase air compressor. But if you have a little workshop, it could not be appropriate for you.
One-stage air compressors are normally much more productive than two-phase air compressors. The sound from a two-phase air compressor is lower simply because there’s no intermediate stage. Solitary-phase air compressors also use a piston that rotates in a solitary stage, while dual-stage air compressors, also identified as duplex designs, are much more effective. A one-phase air compressor is quieter, but double-phase compressors are louder.
air-compressor

Two-stage air compressors are a lot more strength effective

Two-phase air compressors are more strength-efficient than single-stage equipment. The performance of two-stage air compressors is increased via a mixture of enhanced performance and increased longevity. These devices can store much more air and have larger compression ratios. One design of a two-stage compressor can hold approximately eighty three cubic toes of air at a hundred PSI and one hundred twenty cubic ft at 150 PSI. A two-phase compressor is also quieter.
Two-phase air compressors are more power-effective since they have two pistons rather of one. These air compressors achieve a larger force ranking and get well much more speedily. This type of compressor is ideal for work that need large air stress for a prolonged time period of time. In addition, they can operate several instruments simultaneously. This tends to make them far better for professional and industrial use. Detailed beneath are some advantages of two-stage air compressors.
Single-phase air compressors can energy tools in the garage or kitchen, but they are not as reputable for industrial programs. One-stage compressors have more substantial components that tend to knowledge condensation. Additionally, solitary-phase compressors do not last lengthy in continuous use and are much less vitality-productive than two-stage kinds. Whether or not you might be employing the compressor for a solitary tradesperson, a modest crew, or a big design crew, two-phase compressors are the best option.
Single-phase air compressors are frequently utilised in tiny-scale food preparing and manufacturing. One-stage air compressors are simple to transportation between areas, and can be plugged into a number of electrical stores. Solitary-stage compressors are also excellent for large-quantity foodstuff processing. A twin-phase air compressor is ideal for industrial use. In some circumstances, you can even move the one-phase air compressor among two-stage air compressors.
Solitary-stage compressors often cycle also quickly, drawing a lot more electric power than two-stage units. A variable speed unit stays on a low velocity for hrs at a time. Single-phase air conditioners force you to lower your thermostat configurations although single-phase air conditioners operate too typically. Equally units are energy-productive but they are not as energy-successful as variable-velocity compressors. The main big difference is that solitary-phase air conditioners are likely to drain the energy supply a lot quicker.

Piston-pushed air compressors are quieter

A piston-driven air compressor is 1 of the quietest sorts of air compressors. It is considerably less noisy than reciprocating air compressors. A piston-driven air compressor can reach sixty two decibels, whilst a scroll compressor is close to half that volume. The two major components of a scroll air compressor are the piston and the helical screw. These air compressors are both very productive and peaceful.
More mature compressors are exceptionally noisy. They generate a “wumpa” sound equivalent to a large engine. They are also capable of generating a high-pitched whine. These noises can be deafening, specially in a little workshop. That is why it’s vital to appear for a tranquil compressor. But what helps make a compressor quiet? Study on to learn far more about this important resource.
Another distinction amongst piston-driven air compressors and electric-driven air compressors is the energy supply. Electrical air compressors generate less sounds than gas-driven compressors, which use an motor. Piston-pushed air compressors are also more effective. They also generate much less warmth, creating them an ideal decision for workplaces and other configurations the place sound is a issue. The ideal way to decide between the two sorts of air compressors is to check the manufacturer’s guarantee and go through the ‘Description’.
Sounds reduction is the very first priority of a compressor’s operator, so make certain that you have the right model. If you might be working on anything delicate, don’t spot the compressor also near to a developing where people might be nearby. Noise can be really disruptive to the workspace and can result in overall health issues. To help combat sound, you are going to want to purchase a silent air compressor. And never neglect to contemplate its location: Piston-driven air compressors are quieter than their reciprocating counterparts.
Piston-pushed air compressors are silent because the piston is manufactured of slender metallic and far more rubber, which absorbs the seem. As opposed to reciprocating air compressors, piston-driven air compressors are far more efficient than their dual-piston cousins, which are quieter and far more powerful. So which variety is correct for you? Consider a appear at some of the major differences amongst the two. If you want a quiet compressor, make sure it satisfies the technical specs essential by the job you happen to be operating on.
air-compressor

Oil-lubricated air compressors are more value-powerful

There are several reasons why oil-lubricated air compressors are much more costly than dry-variety air compressors. First of all, oil-lubricated air compressors are likely to be far more dependable and silent. Furthermore, oil-lubricated air compressors call for less components and can previous lengthier than dry-kind air compressors. These are just a few of the numerous advantages of utilizing oil-lubricated air compressors.
Oil-totally free air compressors have some disadvantages. They are considerably less resilient and could not be as efficient as oil-lubricated versions. Additionally, due to the fact oil-lubricated air compressors use oil, they can get extremely noisy. Although they are much less high-priced, they are not the ideal alternative for heavy-duty perform. However, present day oil-free of charge air compressors have soundproofing and are suitable for industrial use.
When acquiring an oil-lubricated air compressor, make certain to pick one with a tank ability that fulfills your demands and your space. Bigger tanks can be more expensive than little tanks, but more substantial models are less complicated to go all around. Also, be sure to consider the bodyweight and dimension of the portable air compressors when making your choice. If the fat is also massive, you might have difficulty carrying it from spot to area.
Yet another benefit of employing oil-lubricated air compressors is their reduced need for oil. These models can very last up to a ten years lengthier than oil-totally free counterparts. Oil-totally free air compressors are far more inexpensive and can attain the same high performance as their oil-lubricated counterparts. Many industrial apps gain from these air compressors. So, which one is proper for you? We’ve detailed a handful of of them underneath.
Another advantage of deciding on an oil-lubricated air compressor is the reduced cost of maintenance. This sort is far more durable than its oil-lubricated counterparts, which call for normal oil modifications to preserve them managing effortlessly. Nevertheless, it is not feasible to transport an oil-lubricated compressor, which indicates that you should put in it completely to hold it doing work proficiently. In addition, these air compressors are tough to move and are not transportable, which can restrict your ability to use it in a pinch.

China high quality SCR30xa Silent Oil-Free Scroll Air Compressor     near me shop China high quality SCR30xa Silent Oil-Free Scroll Air Compressor     near me shop