ELM Series РNitrogen & Oxygen Liquefiers


The ELM Series plants liquefy a stream of gaseous nitrogen and/or oxygen to produce liquid nitrogen and/or oxygen.  Production ranges from 150 to 10,000 Nm³/hr.



The liquefier can take a gas stream from most any feed source including an air separation plant or a non-cryogenic gas generator, to produce the liquid products. The ELM plant is designed to minimize shipping and allow for rapid installation by providing the plant in distinct pre-piped, pre-wired modules. The plant system is self-contained and can be completely installed outdoors. The plants require a source of cooling water, power supply and a simple foundation.


ELM Series


The ELM Liquefier produces sub-cooled liquid nitrogen and/or oxygen from a feed gas supply. It utilizes a refrigeration cycle in which nitrogen is compressed above the critical pressure and then expanded through turboexpanders. The unit is equipped with single or dual turboexpanders (> 500 Nm³/hr) for more efficient production.


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
  • High performance turboexpanders with removable cartridge style rotating elements


Options & Accessories

  • 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 since 1958. 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.



ELM Nitrogen Liquefiers (30 to 300 mTPD)


Performance ELM 1000 ELM 3000 ELM 5000 ELM 9000
Production (LIN) Nm³/hr (mTPD) 1000 (30) 3000 (90) 5000 (150) 9300 (279)
Product Pressure barg 6.5 6.5 5.7 5.5
Product Temperature ¬įK 82 82 82 82
Feed Pressure (min.) bara 1.03 1.03 1.03 1.03
Feed Temperature ¬įC 38 38 38 38
Estimated Power kW 840 1,920 3092 5388
Specific Power kWh/ Nm³ 0.84 0.64 0.62 0.58


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.