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Steam Jet Ejectors  

Nash has been designing, manufacturing and troubleshooting steam jet air ejector systems since 1986.  Steam ejectors provide vacuum in many process industries and utility companies. Combining low capital cost, simple operation, high reliability and the ability to handle large volumes at very high vacuum levels, they can be optimized to contribute to process enhancement and operational efficiency.


Nash Steam Jet Ejectors:

  • Are available in a wide variety of materials
  • Designs for ejectors range in size from a one inch inlet to a 78 inch (2 m) inlet
  • Ejectors have matching standard barometric condenser designs
  • Require no moving parts, translating into trouble-free continuous operation
  • Operate efficiently for high vacuum and high volumetric flow requirements
  • Are manufactured and tested (actual ejector or pilot ejector) per HEI standards to guarantee performance
  • Are most suitable for minimizing capital cost, particularly on batch process applications
  • Reduce operating costs when optimized in stages with Nash liquid ring vacuum pumps.  These hybrid systems also enhance vacuum stability

Typical Applications Include:

  • Metal Degasifying: Multistage ejector systems/hybrid systems to achieve absolute pressures of less than 1 torr
  • Petrochemical: Single and multistage ejector systems/hybrid systems are used, dependent on the application
  • Refineries:  Multistage ejector systems/hybrid systems for crude distillation columns  
  • Power: Two-stage ejector system for use as a condenser exhauster
  • Edible-Oil: Multistage ejector systems/hybrid systems for deodorizing, bleaching and other applications
  • Single and multistage systems for other general and chemical applications
  • Ethylene glycol driven ejectors for polyester processing
  • Graphite ejectors for wet HCl service

See more ejector information:

Principles of operation 

All ejector systems 

Ejector/pump hybrid systems 

Ejector systems for refineries 

Ejector systems for the chemical industry  

Ejectors for steel degassing 




Several steam jet engineers with expertise in the design and manufacturing of steam jet air ejectors founded Kinema Inc during the early 1970’s. Kinema became renowned for their expertise solving complex problems and for the workmanship of their ejectors.


In the 1980’s, Kinema and Nash began collaborating and creating hybrid systems consisting of steam ejectors and liquid ring vacuum pumps.  Nash acquired Kinema in 1986, and has continued to design, manufacture and troubleshoot steam jet air ejector systems for various industries.

Ejector package

Steam Jet Ejectors

NASH ejectors are ideally suited to handle applications with large volumes, high vacuum levels, low molecular weight gases and low absolute pressures. Ejector designs are available in sizes ranging from one-inch to 78-inch inlets (2.5 cm to 2 m) and may be combined in various stages to meet your specific ejector application needs.

Product Information. . .>

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