CRYOGENIC AIR SEPARATION UNITS



Airgases Projects offers cryogenic Air Separation units based on in-house process design capabilities coupled with knowhow provided by reputed international plant suppliers on case to case basis depending on plant size and product slate. Such an approach allows Airgases Projects to pick the best technology for the given plant configuration.

For cryogenic air separation units Airgases Projects has technical tie-up with following technology providers.

SIAD Macchine Impianti S.p.A, Italy

SIAD Group is one of the main industrial groups in Europe, founded in Bergamo, Italy in 1927 and is today a leader in the manufacturing and supply of Technical Gases, Engineering and Manufactured Equipment, Welding, Industrial Goods, Healthcare and Services. SIAD Macchine Impianti, S.p.A is the Group subsidiary dedicated to the Engineering and Equipment sector. With a history of focusing on international markets, SIAD MI is global leader in the engineering and manufacturing of Air Separation Units (ASU) for the production of gaseous and/or liquid Oxygen, Nitrogen, and Argon. The Company also engineers and manufactures high quality reciprocating compressors and which along with the air separation plants has become a point of reference for the industrial gases, petrochemical, chemical, and oil and gas upstream/downstream industries SIAD Macchine Impianti, S.p.A has a sole subsidiary company in China named SIAD Engineering (Hangzhou) Co.Ltd. To know more about SIAD please at www.siadmi.com

Kaifeng Huanghe Air Separation Group Co. China

Kaifeng Huanghe Air Separation Group Co., Ltd (KFHH) is one of the leading companies in China specializing in design & manufacture of various air separation units (ASU) and associated equipment. Located in New Economic Zone of Kaifeng, Henan, China, KFHH has capability to produce different sized air separation plants ranging from 50Nm3/h up to 70000Nm3/h. With focus on innovation and updated technologies, KFHH is in excellent position to provide complete cryogenic air separation plants in different size, VPSA oxygen and nitrogen plants, liquid product plants, liquefying units, high purity nitrogen plants; pressure vessels of class I, II & III, HP coil wound heat exchangers and , plate-fin heat exchangers etc as required.

Hangzhou Zhongtai Cryogenic Technology Corporation China

Hangzhou Zhongtai Cryogenic Technology Corporation is specialized in the development, design, manufacture and technical service of cryogenic technical equipment, especially the design and fabrication of cryogenic plants in chemical and energy industries. The key products of Zhongtai are cold box and aluminum plate-fin heat exchangers, columns, as well as spiral-wound heat exchangers. Zhongtai has more than 50 patents regarding propane dehydrogenation cold box separation system and process with double turbine expander, two-phase flow distribution, liquid nitrogen purifying syngas, coke oven gas into LNG, methane,H2 and argon recovery from synthetic ammonia tail gas etc

Zhongtai is committed to meet demands of customers for industrial gas separation, purification, decontamination and liquefaction plants using our own advanced cryogenic technology. We have excellent references in various industries including olefin separation, natural gas liquefaction, syngas separation and air separation. Armed with key proprietary technology, providing overall solutions. Zongtai specializes in four categories of cryogenic plants and cold boxes with references all over globe as per details provided below:

  • Air separation units and cold boxes
  • Olefin separation cold box
  • LNG cold box and EPC projects
  • Syngas cryogenic purification plant

Cryogenic Air Separation Plants employ low-temperature distillation process to produce oxygen, nitrogen and argon. These plants are capable to produce gaseous products for supply through pipeline and /or liquid products for storage and then transportation for delivery to customer. The plants will be designed to meet various product purities and pressures as specified by customer. Our plants complies to highest safety, health, environment and quality (SHEQ) standards to deliver outstanding efficiency, better plant availability and lowest lifecycle costs. The plants are delivered partly in prefabricated modules based on logistics and economy considerations. Wherever required we adapt to modular design to speed up site execution. Majority of Air Separation Plants are built to meet requirement of steel industry but new markets are now emerging with the development of new process applications.

Airgases Projects, provides cryogenic Air separation Plants of capacity ranging between 10 tpd to 200 tpd with varied product mix of oxygen, nitrogen and argon both gaseous and liquid products. The plants are designed for required purities and product pressures. For higher capacities please contact us which will be considered on case to case basis.

Airgases Projects in collaboration with SIAD has recently supplied a 75 tpd liquid Air Separation Plant for a gases company in eastern India.

One of main special feature of our plants is that unlike other international ASU suppliers who focuses on selling standard plants, our specialisation is in providing customized ASU’s, each one specifically designed for customer requirements ie capacity, pressure, purity, product mix and ambient conditions resulting in to ,most energy efficient plant. We do not ask customer to buy what we have but provide to customer what he wants and yet at globally competitive prices because of our relatively low engineering cost base.

Superior process design

  • Optimised design – highest energy efficiency
  • Wide range of gas - liquid product mix and purities as specified
  • Argon production by cryogenic rectification
  • Both internal & external compression cycle available
  • Continuous on line purity monitoring
  • Design with full Safety review
  • Fully automatic operation
  • Focus on opex besides capex
  • Advance process control to optimise plant operation




Flawless design & high reliability

  • Design as per robust design code (ASME)
  • Special insulating paint on cold box
  • Minimal footprint
  • Designed for outdoor installation
  • Compact & modular design
  • Easy maintenance access
  • Use best in class vendors specially for rotating machines
  • Redundancy as required