Independent Engineering Services

Process Engineering

Our process design services leverages two decades of hands-on plant commissioning.

  • Process Simulation Models
  • Process Flow Diagrams, P&IDs
  • Baseline analysis
  • Plant Controls

Centrifugal Compressors

  • Performance Testing
  • Surge Control
  • Protection Strategies

Custom Projects

Clients reach out to EPSIM when unique ideas need to become a reality.  Examples of such projects:

  • Subject Matter Expert for Material Business Risk study
  • Indoor Test Bay design for a liquid oxygen plant
  • Fully automated liquefier for unattended offshore applications
  • Oxygen/argon separation plant
  • Fluor recovery prototype

Other Engineering Services

  • Design Review
  • Performance testing
  • Safety training
  • HAZOP Studies

Equipment For Sale


Oxygen Plants

  1. 140 Ton Per Day cryogenic oxygen Plant, 98 percent purity.  Currently in operation in the USA, available Q1 2020.


  1. Centrifugal air compressor: Joy 3MSG-6, with 2,000 HP motor, 4,000 VAC, 60 Hz.  10,000 scfm at 68 Psig.
  2. Centrifugal air compressor: Joy TA-85, with 1,500 HP motor, 4,000 VAC, 60 Hz.  7,000 scfm at 58 psig.

Liquid Oxygen Tanks

  1. Horizontal LOX tank: 30,000 gallons, 76 Psig MAWP.

If you are interested, please contact us: +1 (303) 938-3088

EPSIM Scope of Services:

The range of our engineering services includes:

  • Cost study
  • Controls upgrade
  • Plant relocation
  • Plant recommissioning
  • Operator training
  • Performance monitoring


Specific plant and compressor performances vary with site elevation and atmospheric conditions. 


All used product is sold “as is where is.” There are no express or implied warranties that extend beyond the warranty set forth herein. There is no warranty of merchantability or of fitness for a particular purpose with respect to service and no warranty shall be implied by law. 

EPSIM Corporation

1942 Boadway, Suite 314, Boulder, CO 80302, USA

(303) 938-3088