How to Source Rotary Screw Air Compressors? The Ultimate Guide

Rotary screw air compressors have achieved unprecedented development in the past two decades. A large number of manufacturers, distributors & dealers are active in this industry, and provide different types of air compressors. This makes it difficult for many factory owners and project managers to purchase easily.

This article will sort out some of the issues you are most concerned about, believe it will be helpful to your sourcing.

What is the Rotary Screw Air Compressor?

The rotary screw air compressor is a type of air compressor that uses a pair of helical screws to compress air. These screws, also known as rotors, rotate in opposite directions, trapping air between them and compressing it as it moves through the compressor. Rotary screw compressors are known for their efficiency, reliability, and quiet operation.

Why is Rotary Screw Air Compressor Preferred?

Rotary screw air compressor is a popular choice in many industries for their efficiency, reliability, versatility, and lower maintenance cost.

Increased Efficiency

Rotary screw air compressor is known for their high efficiency and energy savings. It can operate at a constant speed and provide a continuous supply of compressed air, which results in less energy waste and reduced operating costs

Moreover, screw air compressor can also operate continuously for extended periods without overheating or experiencing performance degradation. That makes it ideal for businesses with high air demand.

Consistent Air Output

Unlike other types of air compressors, screw air compressor can deliver a consistent and steady supply of compressed air.

This is crucial for businesses that rely on compressed air for their operations, such as manufacturing, automotive, and construction.

Versatility

Rotary screw air compressors can handle a wide range of applications, from powering pneumatic tools to operating production lines.

You can also custom it to meet specific air quality requirements, making them suitable for industries such as food processing and pharmaceuticals.

More Cost-effective

Rotary screw air compressor has fewer moving parts compared to other types of compressors, which means lower maintenance costs and fewer breakdowns.

At the same time, rotary screw air compressor also has longer service intervals, which reduces the frequency of maintenance and downtime.

Furthermore, rotary screw air compressor can use variable frequency drives (VFDs) to adjust the speed of the compressor motor based on the air demand, it is variable speed air compressor.

This allows the compressor to consume only the amount of energy needed to produce the required amount of compressed air, thus reducing energy waste and operating costs even further.

Studies have shown that switching from traditional air compressors to rotary screw air compressors can result in energy savings of up to 35%.

In addition, some countries offer energy-saving incentives or tax credits to companies that invest in energy-efficient equipment, which can further increase the cost savings of using a screw air compressor.

Quieter Operation

Rotary screw air compressors can operate at a lower noise level compared to other types of compressors, making them suitable for indoor applications where noise can be a concern.

Environmentally Friendly

Rotary screw air compressor uses less oil and produce less heat, which results in a lower carbon footprint compared to other types of air compressors.

In summary, Rotary screw air compressors offer many benefits, including increased efficiency, consistent air output, versatility, lower maintenance costs, quieter operation, and being environmentally friendly.

If you’re in the market for an air compressor, consider a rotary screw compressor for your business.

How to Confirm What Size Rotary Screw Air Compressor Do I Need?

Selecting the appropriate size of a screw compressor is a critical step in ensuring that your application has a continuous supply of compressed air.

Calculate the air demand, duty cycle, ambient conditions, and operating pressure for your factory/project is key to determining the appropriate size of the compressor.

Why Is Choosing the Right Size Important?

Choosing the right size rotary screw compressor is important for several reasons.

First, a compressor that is too small will not be able to keep up with your air demands, causing a drop in pressure and a decrease in tool performance. This can lead to longer processing times and increased wear and tear on your equipment.

On the other hand, a compressor that is too large will be a waste of energy and money. It will consume more power than necessary, leading to higher electricity bills and increased maintenance costs.

Calculate Air Flow Demand (CFM or m3/min)

Air demand refers to the amount of air flow required by the tools and equipment that will be powered by the compressor.

Air flow, also known as cubic feet per minute (CFM), is the amount of air that a compressor can produce at a given pressure.

The CFM required for your application will depend on the tools and machinery you are using, as well as the size and layout of your workspace.

CFM can be calculated using the following formula:

Air demand (CFM) = Total tool air consumption (CFM) x Safety factor

The safety factor is typically between 1.2 and 1.5 and accounts for the variability in air demand that may occur due to changes in temperature, humidity, and other factors.

You can also click here to check Convert m3/min to cfm chart

Determining the Total Air Consumption

To determine the total tool air consumption, you will need to identify all the tools and equipment that will be powered by the compressor and determine their individual air consumption rates.

This information can typically be found in the user manual or specifications sheet for each tool or equipment. You need to calculate the sum of air consumption of all equipment for your factory or project.

Considering the Duty Cycle

In addition to the air demand, it is also important to consider the duty cycle of the compressor.

Duty cycle refers to the percentage of time that the compressor will be operating in a given period, typically expressed as a percentage of a 10-minute cycle.

The duty cycle can have a significant impact on the size of the compressor needed for your application. For example, if your compressor will be operating for extended periods of time, a larger compressor may be required to avoid overloading the motor.

Determining the Ambient Conditions

The ambient conditions in which the compressor will be operating can also impact the size of the compressor needed.

For example, if the compressor will be operating in an environment with high temperatures, a larger compressor may be required to compensate for the reduced efficiency of the compressor at higher temperatures.

Calculating Operating Pressure

Operating pressure is the pressure at which your tools and machinery operate. The pressure required for your application is another key factor to consider when determining the size of a rotary compressor.

Most pneumatic tools require a pressure of 90 PSI, but some may require higher or lower pressures.

Selecting the Right Size

Once you have determined the air demand, duty cycle, ambient conditions, and system pressure for your application, you can confirm the appropriate size of a rotary screw air compressor.

Oil-lubricated or Oil-free Compressors?

Which type of screw air compressor is right for You?

Oil-lubricated Screw Air Compressors

Oil lubricated screw air compressors also konwn as lubricated rotary screw air compressor. It use oil to lubricate the rotors and bearings.

This lubrication reduces friction, noise, and heat, which increases efficiency and lifespan. Lubricated compressors are ideal for heavy-duty applications that require a continuous flow of compressed air.

Advantages

Oil lubricated screw air compressor systems offer several advantages, including:

Longer lifespan – oil-injected air compressors have a longer lifespan than oil-free compressors since the oil lubricates the internal components.

Better efficiency – The oil lubrication reduces friction and heat, which increases the compressor’s efficiency.

Lower noise levels – oil lubricated air compressors operate at lower noise levels due to the reduced friction between the rotors and bearings.

Disadvantages

Despite their advantages, oil-lubricated screw air compressors also have some disadvantages, including:

Higher maintenance costs – It requires frequent oil changes and maintenance, which can be costly.

Oil contamination – It can contaminate the compressed air with oil, which may not be ideal for some applications.

Applications of Lubricated Screw Air Compressors

Oil-lubricated screw air compressors are ideal for heavy-duty applications that require continuous operation. They are commonly used in manufacturing, construction, and mining industries.

Oil-Free Screw Air Compressors

Oil-free screw air compressors do not use oil for lubrication but instead use other materials such as PTFE or carbon fiber for sealing and cooling.

Advantages

Oil-free screw air compressor systems offer several advantages, including:

Cleaner air – Oil-free compressors do not contaminate the compressed air with oil, making them ideal for applications that require clean air.

Lower maintenance costs – Oil-free compressors require less maintenance than lubricated compressors, making them more cost-effective in the long run.

Better for the environment – Oil-free compressors do not emit oil into the environment, making them more environmentally friendly.

Disadvantages

Oil-free screw air compressors also have some disadvantages, including:

Lower efficiency – Oil-free compressors are less efficient than lubricated compressors due to increased friction and heat.

Shorter lifespan – Oil-free compressors have a shorter lifespan than lubricated compressors.

Applications of Oil-Free Screw Air Compressors

Oil-free screw air compressors are ideal for applications that require clean air, such as food and beverage, pharmaceuticals, and electronics manufacturing. They are also commonly used in dental and medical offices.

Choosing between Oil-Lubricated and Oil-Free Screw Air Compressors

Oil-lubricated and oil-free rotary screw air compressor systems have their advantages and disadvantages, and the choice between the two depends on specific application requirements, budget, and environmental concerns.

Application requirements – The type of air compressor chosen depends on the specific application requirements.

Oil-injected compressors are ideal for heavy-duty applications that require continuous operation, while oil-free compressors are ideal for applications that require clean, oil-free air.  heavy-duty applications require lubricated air compressors.

Budget – Oil-injected compressors are typically more expensive than oil-free compressors due to the additional cost of oil changes and maintenance.

Environmental concerns – Oil-free compressors are more environmentally friendly than lubricated compressors due to the absence of oil emissions.

Noise levels – Oil-injected compressors operate at lower noise levels than oil-free compressors due to the oil lubrication.

How to Choose a Rotary Screw Air Compressor Supplier?

By considering these factors, you can make an informed decision on the type of rotary screw air compressor that is right for your application

Choosing the right supplier for your business is crucial to ensure that you get the best value for your money and the most reliable products.

Factors to Consider when Choosing a Rotary Screw Air Compressor Supplier:

Quality of Products

The quality of the products offered by the supplier is one of the most important factors to consider when choosing a rotary screw air compressor supplier.

You should look for a supplier that offers high-quality products that meet or exceed industry standards. This will help to ensure that your equipment lasts longer and performs optimally.

Easy to install

Whether it is easy to install is a factor that you need to consider when purchasing for your customers or factories.

Here are some of the benefits of this advantage:

1. User-friendly: Easy installation means that the compressor is user-friendly, making it easier for operators to use and maintain.

2. Time-saving: An easy installation process can save a lot of time, allowing the factory to get the compressor up and running quickly.

3. Cost-effective: A quick and easy installation can help reduce labor costs associated with the installation process, saving money for the end factory.

4. Increased productivity: With reduced downtime, the factory can increase its productivity and output, leading to higher profits.

5. Improved efficiency: A well-installed compressor can operate more efficiently, providing better performance and energy savings.

6. Enhanced reliability: Easy installation ensures that the compressor is reliable and long-lasting, reducing the risk of breakdowns and maintenance costs.

7. Adaptability: With an easy installation process, the compressor can be adapted to different environments, allowing the factory to use it in various applications.

8. Improved safety: A well-installed compressor is safer to operate, reducing the risk of accidents in the factory.

Range of Products

You should also consider the range of products offered by the supplier.

Look for a supplier that offers a wide range of air compressors, so you can choose the one that best suits your business needs. This will also ensure that you have access to the latest technology and innovations in the field.

Price：Get the Best Value for Your Money

Price is an important consideration when choosing a rotary screw air compressor supplier. You should look for a supplier that offers competitive prices for their products.

However, keep in mind that the cheapest option may not always be the best. Consider the overall value that the supplier offers, including quality of products, customer service, and after-sales support.

Customer Service

Good customer service is crucial when it comes to choosing a rotary screw air compressor supplier. Look for a supplier that is responsive, knowledgeable, and helpful. They should be able to answer any questions you have and provide you with the information you need to make informed decisions about your equipment.

After-Sales Support

After-sales support is another important consideration when choosing a rotary screw air compressor supplier. Look for a supplier that offers comprehensive after-sales support, including maintenance and repair services.

Many local factories import rotary screw air compressors from other countries.

At this time, many suppliers cannot carry out on-site maintenance. But you should ask them to let the engineer contact you as soon as possible, then propose a solution, and send the corresponding accessories.

This will help to ensure that your equipment continues to perform optimally and that any issues are resolved quickly.

Comparing Product Performance of Different Suppliers

Furthermore, here are some key parameters and performance indicators that you should compare different supplier:

Air Flow

You need to consider your air demand requirements and select a compressor that can meet or exceed that demand.

Power

This is the horsepower (HP) of the compressor. The power of the compressor should be matched to your specific requirements. If you choose an air compressor with insufficient power, it will struggle to meet the demand and may wear out quickly.

Pressure

The pressure rating of the compressor determines the amount of air pressure the compressor can generate. You need to ensure that the compressor can supply the required air pressure for your application.

Duty cycle

This is the amount of time that the compressor can run continuously without overheating. You need to select a compressor that can operate at a duty cycle that matches your needs.

Efficiency

The efficiency of the compressor is measured by its specific power consumption, which is the amount of energy used per unit of air delivered. A more efficient compressor can save you money on energy costs over time.

Maintenance requirements

You should consider the maintenance requirements of the compressor when selecting a machine. Some compressors require more frequent maintenance than others, and you need to factor this into your decision.

Size and weight

The physical size and weight of the compressor are important considerations, especially if you have limited space or need to move the compressor frequently.

By taking these parameters and performance indicators into account, you can choose a rotary screw air compressor that is the right size and capacity for your needs and delivers optimal performance.

It is always advisable to consult with a professional to ensure that you make the right choice for your specific application.

Where Should I Source Rotary Screw Air compressors?

When considering the purchase of a rotary screw air compressor, it is important to weigh the advantages and disadvantages of different countries and regions as potential suppliers. Here are some key details to consider for the top regions:

United States

USA is home to many well-known manufacturers of rotary screw air compressors, such as Ingersoll Rand and Quincy Compressor.

These companies have a long history of producing high-quality equipment, and American-made compressors are known for their durability and reliability.

Pros:

• Highly developed market with established standards and regulations.
• Large selection of manufacturers and distributors.
• Advanced technology and innovation in the industry.

Cons:

• Higher prices compared to other regions.
• More strict regulations and standards may limit some options.

Market Players:

• Ingersoll Rand
• Sullair
• Kaeser Compressors
• Quincy Compressor
• Gardner Denver

Switzerland

Swedish is renowned for its precision engineering and advanced technology, and Switzerland-made rotary screw air compressors are no exception.

Manufacturers such as Atlas Copco had built strong reputations for producing reliable and energy-efficient compressors with advanced features like variable speed drives and integrated air treatment systems.

Pros:

• High quality and precision engineering.
• Advanced technology and innovation in the industry.
• Access to a diverse range of manufacturers and distributors.

Cons:

• The highest prices

Key Market Players:

• Atlas Copco

Japan

The most impressive trait of Japanese businessmen is their rigorous attitude. They focus on producing high-quality air compressors, which has made them very popular in the international market.

In addition, Japanese manufacturers have invested heavily in research and development to create compressors with innovative features like eco-friendly refrigerants and digital controls.

Pros:

• High quality and precision engineering.
• Advanced technology and innovation in the industry.
• Access to a diverse range of manufacturers and distributors.

Cons:

• High price
• Poor communication
• Capacity constraints

Market Players:

• Hitachi
• Kobelco

China

China has emerged as a major player in the rotary screw air compressor market, with many domestic manufacturers producing high-quality equipment at competitive prices. Since 2010, the rotary screw air compressor technology of Chinese manufacturers has developed rapidly.

Airprossa integrated screw air compressors and oil-free air compressors are popular in North America, Europe, Southeast Asia, Africa and other markets for their advantages of energy saving, high efficiency, easy installation, low failure rate, and low maintenance frequency.

China’s air compressor market is expected to see strong growth in the coming years, driven by increasing demand from industries like energy, mining, and construction.

Pros:

• More affordable prices than other areas
• Reliable technology
• Abundant capacity, fast delivery

Cons:

• Less established regulations and standards in some countries.
• Quality may be inconsistent among manufacturers.

Market Players:

• Atlas Copco
• Ingersoll Rand
• Kaishan
• Xinlei
• Airpressa

Your local place

Not every country or region has reliable air compressor manufacturers. Does this mean you can’t buy locally?

Not necessarily. Almost every country with an industrial base has a large number of air compressor distributors and dealers.

They use their strong purchasing power and business negotiation skills to import reliable air compressors from other countries and resell them to local factories or engineering firms.

A simple way to find distributors near you is to search for “rotary screw air compressors” on Google Maps.

Of course, these distributor and dealers need to make a profit.

In the trend of economic globalization, importing air compressors from other countries such as the United States, Germany, Japan, and China is also a good option.

The downside is that you need to conduct supplier research and negotiations, and transportation takes longer. However, the benefits are obvious. You can get factory direct prices and guaranteed quality.

A fact is that even Germany and the United States, which are known for their high quality, imported more than 100,000 rotary screw air compressors from China every year.

In Conclusion

Now you can confirm how to procure the right rotary screw air compressor.

1. Determine the required air volume based on your scale and project size.

2. Decide whether to purchase an oil-injected or oil-free air compressors.

If you’re in an environmentally sensitive industry such as textiles or pharmaceuticals, it is recommended to purchase an oil-free compressor.

3. Determine where to source

• Your local
• Import from Germany, USA, Japan, or China.

This will depend on your budget, and you can send multiple inquiries for comparison. Germany and the United States purchase higher cost-effective rotary screw air compressors from China every year for their factories or resale purposes.

4. Compare suppliers

Check the prices and product parameters sent by suppliers:

• Airflow
• Efficiency
• Pressure
• Power
• Duty cycle
• Noise level
• Whether it is easy to install
• Maintenance costs
• Size and weight

You can continue to view some other frequently asked questions.

FAQs

Q: What are the advantages of using a rotary screw air compressor?
A: Rotary screw air compressors offer several advantages, including high efficiency, low noise, and low maintenance requirements.

Q: What industries use rotary screw air compressors?
A: Rotary screw air compressors are used in a wide range of industries, including manufacturing, construction, mining, and automotive.

Q: What is the lifespan of a rotary screw air compressor?
A: The lifespan of a rotary screw air compressor depends on several factors, including usage, maintenance, and quality of the product. A well-maintained rotary screw air compressor can last up to 15 years or more.

Q: How often should rotary screw air compressors be serviced?
A: Rotary screw air compressors should be serviced at least once a year, or more frequently if they are heavily used.