POPLAR SERIES – Air Separation Plants

The POPLAR air separation plant produces liquid oxygen, liquid nitrogen, and, as an option, liquid argon suitable for all industrial sectors, including medical applications.  Cosmodyne’s nearly 50 years of experience wpoplar overview mainith cryogenic plants is reflected in the design and durability of the POPLAR series.


Capacities range from just over 40 metric tons per day to 200 tons per day of total liquid product. The plants have been designed to provide the lowest specific power, as low as 0.89 kw-hr/Nm³.   The POPLAR plant is designed to minimize shipping and allow for rapid installation by providing the plant in seven distinct, pre-piped and pre-wired modules:  cold box, turbo-expander, air chiller, heater skid and adsorber vessels.


The POPLAR air separation plant is a highly modular system that can produce liquid oxygen, liquid nitrogen and, as an option, liquid argon.  In addition, gaseous nitrogen or gaseous oxygen is also available if required for on-site or pipeline applications.   The POPLAR plant employs a PLC based control system, with a user-friendly graphic interface. After start up, the plant operation is fully automated with provision for local or remote access via telephone line or the internet.  The battery limits to the plant are simple; power to each of the two compressors, power to the medium voltage distribution, cooling water, and product connections.   When run in maximum oxygen mode, a nitrogen gas stream is available for pipeline application or future liquefaction.    Similarly, in maximum nitrogen mode, the plant can be tailored to produce oxygen gas along with other liquid products for pipeline or other on-site application.  If desired, the gas streams can be fed to a Cosmodyne ELM series liquefier for liquefaction.


Standard Equipment & Features:

  • Cosmodyne PLC based control system provides efficient, user-friendly graphic interface for remote, local or unattended operation
  • Automatic control of all primary plant functions
  • State-of-the-art analytical instrumentation package
  • Dual, high performance turbo-compressors with removable cartridge style rotating elements
  • Proven molecular sieve type air clean-up system
  • Turboexpander and cryogenic equipment are designed and built in-house


Options & Accessories

  • Crude Argon Production
  • Refined Liquid Argon Production
  • Nitrogen Liquefier ‚Äď ELM Series
  • Closed Loop Evaporative Cooling System
  • 50 or 60 Hertz Electrical System
  • Product Storage Tanks
  • Cylinder Charging Systems
  • Liquid Transfer Pump Systems
  • Other customized features for site specific requirements



  • On-site or in-factory operator training
  • Installation and commissioning assistance
  • Extended warranty package
  • Service package
  • Aftermarket spare parts support
  • Aftermarket technical support



Cosmodyne is a world leader in the design and manufacture of air separation plants. Each Cosmodyne system is designed and built to rigorous standards of quality and workmanship from nearly a half-century of experience. From proposal to installation, our sales, engineering, manufacturing and field-service personnel continually demonstrate our commitment to customer satisfaction. ¬†And this commitment doesn‚Äôt end with delivery — our field-service staff is ready to serve you 24 hours a day, wherever you are.¬† When you buy a Cosmodyne plant you can be sure you will receive a quality built and reliable plant. ¬† All plants, regardless of destination, are built to the following codes: – Pressure vessels: Per ASME Section VII, Div. 1 and includes code stamp and name plate – Piping systems: Per ASME B31.3 – Electricals: NEC, NEMA and UL standards ¬† Additional code compliance available including: CE/PED, CRN/CSA, GOST, MIL-SPEC, API and various marine certifications. Prior to shipping, each module is tested for pressure, strength, tightness, and control functionality.





Operating Mode

P1500 P2000 P2500



Max O2 Max N2 Max O2 Max N2 Max O2 Max N2 Max O2 Max N2 Max O2 Max N2 Max O2 Max N2


Liquid Oxygen Nm3/hr 1,300 40 1,770 60 2,230 80 2,700 100 3,969 120 4,605 150
Liquid Nitrogen Nm3/hr 200 1,520 315 2,112 443 2,725 500 3,287 801 4,930 921 5,686
Liquid Argon Nm3/hr 40 0 45 0 76 0 85 0 130 0 140 0
Total Liquid Nm3/hr 1,540 1,560 2,130 2,172 2,749 2,805 3,285 3,387 4,900 5,050 5,666 5,835
Gaseous Nitrogen(1) Nm3/hr 1,850 0 3,000 0 3,200 0 4,200 0 7,000 0 8,000 0


Liquid Oxygen % O2 min 99.6% 99.6% 99.6% 99.6% 99.6% 99.6%
Liquid Nitrogen ppm O2 max 5.0 5.0 5.0 5.0 5.0 5.0
Pure Liquid argon % Ar min 99.999% 99.999% 99.999% 99.999% 99.999% 99.999%
Crude Liquid argon ppm O2 max 2.0 2.0 2.0 2.0 2.0 2.0
Gaseous nitrogen ppm O2 max 5.0 5.0 5.0 5.0 5.0 5.0


Power kW 1,636 1,600 2,150 2,085 2,644 2,608 3,120 2,961 4,654 4,520 5,380 5,220
Cooling water lpm 4,600 6,000 7,300 8,690 12,750 14,340
Specific Power kWh/Nm³ 1.06 1.02 1.01 0.96 0.96 0.93 0.95 0.89 0.95 0.89 0.95 0.89

(1) Optional product

Nm¬≥ specified at 0¬įC, 1.013 bara

Plant performance is based on standard atmospheric conditions (ambient temperature 20¬įC, relative humidity 50%, cooling water temperature 19¬įC, 1.0 atm barometric pressure)

Specific power excludes cooling water power.