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Air Separation Units (ASU)

Centrifugal Compressors for Air Separation Units

Industry Requirements

Producing industrial gases requires a great deal of energy, making the need for an efficient compressed air or nitrogen system critical to plant success.

To produce industrial gases such as purified nitrogen or oxygen, atmospheric air is compressed, cooled, and separated in a distillation column or cold box. Once the cryogenic separation is complete, the gases are used in other processes or compressed for storage and transportation.

The gases produced during this process can be used in various areas, including producing chemicals and petrochemicals, liquefaction of natural gas (LNG), clean, dry air for electronics manufacturing, and liquefaction of nitrogen for distribution. As a key component of the separation process, reliable and energy-efficient air and nitrogen compressors are crucial to maintaining low operating costs. 


Industry Solution

FS-Elliott’s comprehensive product portfolio and engineering capabilities provide competitive solutions for highly customized as well as standard projects.

With a global presence of 250+ air separation installations worldwide, our compressors are customized for efficiency and tailored to your needs. We prioritize superior life-cycle cost benefits, ensuring a quick ROI. FS-Elliott standardized packaging reduces lead times, meeting ASU customer demands and site-specific needs. 

FS-Elliott air compressors are versatile, fitting various air separation plant roles, including Main Air Compressors (MAC), Booster Air Compressors (BAC), Booster Nitrogen Compressors (BNC), Nitrogen Gas Compressors (GAN), and combination machines like MAC/BAC, MAC/BNC, and MAC/GAN. Our commitment to cost efficiency ensures customers quickly realize their investments.

Discover more about the advantages that an FS-Elliott compressor can bring to your air separation facility.

Air Separation Applications

Air Separation Products

  • P500

    70 – 130 m3/min
    2,600 – 4,500 CFM

  • P600

    110 – 190 m3/min
    4,000 – 6,800 CFM

  • P700

    170 – 340 m3/min
    6,000 – 12,000 CFM

  • PAP Plus® BH

    100 – 200 m3/min
    3,500 – 7,000 CFM

  • PAP Plus® CH

    155 – 340 m3/min
    5,500 – 12,000 CFM

  • PAP Plus® DH

    285 – 525 m3/min
    10,000 – 18,500 CFM

  • PAP Plus® EH

    425 – 695 m3/min
    15,000 – 24,500 CFM

Case Study: Industrial Gas Producer Reduces Capital Expenditures

  1. Case Study

    Learn how an industrial gas producer reduced capital expenditures and increased overall efficiency.

    View full case study.

  2. Background

    An industrial gas producer opened a new air separation plant that required 4440 Nm3/h of air and 2100 Nm3/h of gaseous nitrogen for production.

    View full case study.

  3. Manufacturing Challenge

    Due to the modular design of the plant, the compressors selected for the project needed to be minimal in size but capable of high-efficiency gas production.

    View full case study.

  4. Results

    Customer reduced capital expenditures and increase overall efficiency by combining the air and nitrogen processes in one machine.

    View full case study.

Learn how an industrial gas producer reduced capital expenditures and increased overall efficiency.

View full case study.

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In my 30 years of industrial engineering, that is the finest piece of equipment that I have ever seen.

Corporate Facilities Engineer