Adsorption oxygen plants

Grasys offers its customer the advanced serial adsorption oxygen plants AKC as well as adsorption plants custom-designed in accordance with individual technical assignments. The plant production capacity reaches 3,000 nm³/hr at the oxygen purity up to 99%.

If the customer is interested in oxygen production with cylinders filling Grasys can offer adsorption oxygen plants for cylinders filling.

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AdvantagesGeneral informationTechnical characteristicsApplicationBookletsDocumentation


  • Full automation, ease of maintenance
  • High fail-safety and reliability
  • Minimum operator control required during operation
  • Quick system startup and shutdown
  • High purity of product oxygen
  • Small footprint and weight
  • Low operating costs

General information

Grasys oxygen plants are produced on the basis of the well established pressure swing adsorption (PSA) and vacuum pressure swing adsorption (VPSA) technologies. The plant operating principle is based on the adsorbent materials capability of selectively adsorbing nitrogen molecules and impurity gases contained in atmospheric air while allowing oxygen molecules to freely pass through. All adsorbents used in oxygen generators undergo certification and inspection in Russia which guarantees operating reliability of systems and high quality of the product.

The adoption of air separation adsorption oxygen plants allows multiply reducing the cost of oxygen produced. The undoubted advantage of these systems, apart from the economic benefit, is their simple operation and maintenance combined with enhanced reliability.

The array of applications of oxygen plants is extremely wide and includes such areas as autogenous oxygen production (apart from automated metal cutting); oxygen generators are also helpful in the silicate, pulp and paper, food and pharmaceutical industries, in fish farming, sewage treatment and ozonation plants feeding, solid waste incineration and in medicine.

Grasys offers a broad range of air separation plants for oxygen production, from small-scale mobile systems designed for cutting and welding of metals to systems intended for arrangement of a self-contained production with standard oxygen cylinders filling under oxygen pressure of 150 atm.

Basic technical characteristics of adsorption oxygen plants

Parameter Value
Oxygen parameters at the plant output
  • nitrogen purity, %
up to 95-99
  • capacity, nm³/hr*
  • pressure, atmg
  • dew point, °C
Ambient air temperature
  • during operation, °C
  • during storage, °C
Warm-up period, max, minutes 20
Plant operational life, thous. hours 70–120

* The capacity is referenced to the standard conditions (t = 20 °C, P = 1 atm).


  • Raising temperature in fusion and glass furnaces
  • Recovery of various chemical compounds
  • Reduction in sulfur deposits in refineries
  • Gas welding, cutting and brazing of metals
  • Reduction in fry incubation period in fish farming

Permit documentation

ЕАЭС N RU Д-RU.НХ37.В.00753/20 Download PDF; 295,13 KB
View all certificates and permits of Grasys
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