What is an Air Separation Unit (ASU)?
Air separation unit (ASU)
A Cryogenic Air Separation Unit (ASU) is an industrial facility that separates atmospheric air into its primary components—primarily oxygen, nitrogen, and argon—using a process of cryogenic fractional distillation at extremely low temperatures (typically below -150°C).
Cryogenic ASUs are the most efficient method for producing large volumes of high-purity gases, which are essential in industries such as steelmaking, chemical production, medical applications, electronics, and metal fabrication.
How it works
1.Air is filtered, compressed, and purified to remove moisture, carbon dioxide, and other impurities.
2.The clean air is cooled to cryogenic temperatures until it liquefies.
3.The liquid air is fed into a distillation column where it is separated based on the different boiling points of its components.
4.High-purity gases are extracted, warmed, and stored or delivered as products.
Custom ASU Solutions
At JINHUA GAS, we design and manufacture custom Air Separation Units (ASUs) engineered to meet your specific operational needs. Each unit is optimized for high performance, energy efficiency, and long-term reliability.
ASU Design Features and Technical Advantages
High-Purity Gas Output
- Delivers gases meeting stringent industry standards
- Advanced distillation ensures consistent, high-purity output
- Ideal for metal fabrication, chemical processing, and healthcare
Energy-Efficient Cold Box
- State-of-the-art DCS enables seamless operation
- Automated start-up, shutdown, and optimization
- Remote monitoring for real-time control and enhanced safety
Fully Automated Control
- State-of-the-art DCS enables seamless operation
- Automated start-up, shutdown, and optimization
- Remote monitoring for real-time control and enhanced safety
Modular & Scalable Design
- Flexible modular structure for easy installation and maintenance
- Supports future capacity expansion
- Adapts to evolving production demands with custom solutions
Industrial and Commercial Applications of ASU
In steelmaking and metal fabrication, high-purity oxygen is essential for furnaces to cut and weld metals efficiently. In the chemical industry, nitrogen creates inert atmospheres for safe processing, and oxygen is a key feedstock for ammonia synthesis and other processes, driving productivity and scale.
Looking for Other Applications?
Have a specific use case not listed here? Our ASUs can be customized for your unique requirements.
Industrial Manufacturing
Steelmaking:
High-purity oxygen for furnaces and metal cutting
Chemical Processing:
Nitrogen for inerting, oxygen for ammonia synthesis
Electronics & Welding:
Argon for precision manufacturing
Healthcare & Scientific Research
Central Medical Gas Systems:
Reliable medical-grade oxygen supply
Therapeutic & Surgical Use:
Oxygen for patient care and anesthesia
Scientific Research
Rare Gas Extraction:
Neon (Ne), Krypton (Kr), Xenon (Xe)
Advanced Applications:
Laser technology, lighting systems, R&D
Energy & New Technology
Clean Energy:
Oxygen for gasification, nitrogen for LNG
Aerospace:
Propellant production for rocket systems
Emerging Fields:
Hydrogen energy, carbon capture solutions
How Much Does an Air Separation Unit Cost?
Capacity & Scale: From Modular to Turn-Key Plants
The air separation unit cost varies significantly with scale. Small, modular units are ideal for limited spaces and lower output, while large-scale, custom-built plants for heavy industries represent a major capital project. We provide solutions across this spectrum, ensuring you invest in a plant that matches your exact production volume, from a few hundred to tens of thousands of Nm³/h.
Technology & Purity: Tailored to Your Process
The required gas purity and specific technology path (e.g., cryogenic vs. PSA/VPSA) are key cost drivers. Higher purity levels and more complex gas mixes necessitate advanced distillation internals and control systems, impacting the air separation unit price. We engineer each ASU to meet your precise specifications, avoiding over-engineering and unnecessary expense.
Efficiency & Automation: Reducing Lifetime Cost
Beyond the initial air separation unit capital cost, operational expenditure is crucial. Our plants are designed with energy-efficient cold boxes and intelligent automation that minimize power consumption and labor needs. This focus on low lifetime cost ensures your investment remains profitable for years to come.
Precise Quotation & Long-Term Value
Due to the custom nature of industrial ASUs, we provide detailed quotations after understanding your needs. The final cost reflects a balance of performance, quality, and long-term reliability. When you evaluate an air separation unit for sale, consider the total value—our robust engineering and proven track record deliver an unmatched return on investment.
Find Your Reliable ASU Partner
As leading air separation unit manufacturers, we begin with an in-depth project assessment. Our experts work with you to design a customized ASU solution tailored to your specific capacity, purity requirements, and desired operation mode (e.g., gaseous, liquid, or hybrid), ensuring the blueprint perfectly aligns with your business goals.
Tailored ASU Design
We design customized solutions based on your capacity, purity, and operational needs. Whether for industrial gas supply or specialized applications, our engineering team creates ASUs that align precisely with your goals.
Quality Manufacturing & Support
As leading air separation unit suppliers, we oversee precision manufacturing, seamless installation, and smooth commissioning. We ensure on-time delivery and operational readiness—anywhere in the world.
Long-Term Operational Partnership
Related Product
Air Separation Unit FAQs: Your Questions Answered
Contact Us
As a leading air separation unit manufacturer and supplier, we specialize in the engineering and delivery of custom ASU solutions. Whether you need a standard plant or a fully customized system, our team is here to provide the reliable technology and support your project demands. Let's discuss how our expertise can become your advantage.
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Read More Keep in Touch With Us
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