Evergreen Compressed Air and Vacuum partners with some of the most-trusted compressed air equipment manufacturers, guaranteeing best-in-class energy efficiency and long-lasting durability. This ensures that your compressed air system delivers the most cost-effective ownership experience.

Evergreen provides ELGi rotary screw air compressors, which excel in energy efficiency and dependability, setting the benchmark in the industry. These air compressors are supported by an Uptime Guarantee so that you can have confidence that your compressed air system will run seamlessly throughout production. ELGi rotary screw air compressors offer both oil lubricated and oil-free air compressor models, accompanied by integrated VFD controls. This combination optimizes efficiency while meeting the required air quality standards.

EN Series Rotary Screw Air Compressors 4–50 Hp

Introducing the ELGi EN Series compressors: a streamlined solution that brings enhanced value and increased operational efficiency to your investment. Experience elevated uptime with ELGi EN Series compressors, accompanied by a reduced noise footprint for a quieter operational environment.

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EG Series Rotary Screw Air Compressors 15–300 Hp

The ELGi Global (EG) Series compressors embody direct drive operation, best-in-class UPTIME, energy efficiency, and versatile optional features, representing a substantial advancement in design and performance, adhering to international standards, and delivering cost savings and rapid ROI.

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Every customer of ELGi AB Series globally can rest assured of contamination-free compressed air, with a guaranteed reduction in emissions, and the assurance of Class Zero air quality, completely free from oil residues, at all times.

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Oil-Free Rotary Screw Air Compressors 60-600 Hp

ELGi stands among the select air compressor companies that create and produce oil-free airends, employing proprietary technology to engineer compressors that prioritize optimal uptime and dependability.

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Rotary screw air compressors are categorized as a positive displacement compressor, functioning by capturing air between interlocking helical screws or rotors in motion. Its primary purpose is to deliver an uninterrupted stream of compressed air, serving diverse industrial needs. These versatile air compressors excel in consistent and efficient operation, making them well-suited for diverse industrial environments necessitating a steady provision of compressed air. Available in a variety of sizes and capacities, they cater to distinct air demand prerequisites.

Evergreen offers both oil-lubricated and oil-free rotary screw air compressors.

What are the benefits of rotary screw air compressors?

  • High Efficiency : Compared to some other types of compressors, rotary screw compressors are generally more efficient. They produce less energy waste, which means they can deliver more compressed air output for the energy input they consume.
  • Continuous Operation : Rotary screw compressors can operate continuously without the need for frequent starts and stops. This makes them ideal for applications that require a consistent and reliable supply of compressed air.
  • Reliability : With less moving parts and a balanced design, rotary screw compressors are known for their reliability and durability, requiring less maintenance and reducing downtime.
  • Low Noise : Due to advanced noise reduction technology, rotary screw air compressors operate at lower noise levels, which can prove to be an advantage for indoor applications or noise-sensitive environments.
  • Compact Design : Rotary screw compressors have a space-efficient design, which makes them suitable for installations where space is limited.

What are the common industries for rotary screw air compressors?

Evergreen supplies energy-efficient and reliable rotary screw air compressors for many industries. These air compressors are widely used across various industries due to their efficiency, reliability, and versatility. Some more popular industries include:


From assembly lines to painting and sanding operations, rotary screw compressors play a crucial role in automotive manufacturing processes.


Rotary screw compressors are extensively used in manufacturing processes for powering pneumatic tools, controlling machinery, and maintaining consistent air pressure for production lines.


The textile industry relies on compressed air for various processes such as spinning, weaving, and dyeing fabrics.


From assembly lines to painting and sanding operations, rotary screw compressors play a crucial role in automotive manufacturing processes.Rotary screw compressors can provide contaminant-free and oil-free air required for critical pharmaceutical processes and packaging.

Food and Beverage

Compressed air is used for packaging, conveying materials, operating pneumatic systems, and ensuring cleanliness in food and beverage processing facilities.


Compressed air powers presses, cutters, and other equipment in printing and paper production.

How should I choose between an oil-free or oil-lubricated rotary screw air compressor?

Choosing between an oil-free and an oil-lubricated rotary screw air compressor depends on your specific application requirements, air quality needs, and operational preferences. The decision between an oil-free and an oil-lubricated rotary screw air compressor should be based on your specific needs. Here are some key factors to consider when making this decision:

Oil-Free Rotary Screw Air Compressors:

  • Air Purity Requirements : Consider the level of air purity needed for your applications. If your processes require completely oil-free air to prevent contamination,an oil-free compressor is essential.
  • Maintenance and Oil-Free Operation : Oil-free compressors generally have lower maintenance requirements since there's no need for oil changes or filtration of oil contaminants. This can lead to reduced downtime and maintenance costs.
  • Long-Term Cost Savings : While oil-free compressors often have higher upfront costs, they can provide long-term cost savings by eliminating the need for oil-related maintenance, reducing the risk of downtime, and ensuring consistent air quality.

Oil-Lubricated Rotary Screw Air Compressors:

  • Initial Cost and Budget : Oil-lubricated compressors generally have a lower upfront cost compared to oil-free models. If budget constraints are a concern, an oil-lubricated compressor might be a more economical choice.
  • Application Flexibility : Oil-lubricated compressors are suitable for a wide range of general industrial applications where air quality is not a critical factor. If your application doesn't require strict air purity, an oil-lubricated compressor can be considered.
  • Energy Efficiency and Technology : Modern oil-lubricated compressors are designed with energy-efficient features. Some models incorporate variable speed drives (VSD) to optimize energy consumption by matching output to demand.
  • Ease of Maintenance and Flexibility : Oil-lubricated compressors may require more frequent maintenance due to oil changes and filter replacements. However, maintenance procedures are often straightforward, and technicians are familiar with oil-based systems.

How should I choose the best rotary screw air compressor for my facility?

Ultimately choosing the right rotary screw air compressor for your facility depends on a few key factors such as: air demand and capacity, efficiency and energy consumption, air quality requirements, maintenance and reliability, and budget and total cost of ownership.

Evergreen Compressed Air and Vacuum serves as your partner in choosing the bestcompressed air system for your facility. Contact us today, we would be happy to assist you with any questions or concerns you may have!