Full-service supplier of air separation plants, oxygen and nitrogen generators and CO2 plants. Gas & liquid supplier to end users and to distributors of bulk liquids & packaged gases. Manufacturer and supplier of air separation plants, engineering, field services, and on-site produced nitrogen and oxygen.

Pressure Swing Adsorption (PSA)
Nitrogen Generators

Universal Industrial Gases offers nitrogen PSA models meeting the needs of a wide range of nitrogen users.  Highly efficient and reliable, these non-cryogenic nitrogen generator systems are small in size and operate automatically. 

Savings of 40% or more compared to cylinder gas or bulk liquid delivery prices are common.

  • Smaller capacity units may be purchased for owner operation, or

  • UIG will install, operate and maintain higher capacity units as part of a complete on-site supply installation, that delivers nitrogen gas in a utility-like manner.  


Nitrogen PSA generation units can be supplied to fit the needs of users with demand up to approximately 40,000 SCFH.  

Many users will find that a UIG nitrogen PSA system sized to meet their base load demand, coupled with liquid nitrogen vaporization to meet short-term peaks, is a highly cost effective solution to their nitrogen supply needs. 

Most users do not require very high purity nitrogen.  Maximum savings versus vaporizing trucked-in liquid nitrogen are obtained when the units produce 95 to 99.5% oxygen-free product.  If higher purity is required, UIG can supply systems that will produce product with purity very close to that of vaporized liquid nitrogen (up to 99.000%).

Typical Low Production Rate Nitrogen PSA Typical Higher Capacity Nitrogen PSA System
Compressor, Drier, Adsorbers, Gas Storage
Deoxo Units purify
to 99.999% Purity

UIG offers an onsite gas supply option for larger volume users:

UIG offers nitrogen PSA-based onsite gas supply systems to customers requiring more about 10,000 SCFH or more of product (about 7 million SCF/mo, 260 Nm3/h, or 190,000 Nm3/mo). 

UIG will install the plant at the customer's site and provide operations support and periodic maintenance services.  Where necessary, UIG can include liquid nitrogen storage and vaporization systems to handle short-duration demand peaks and/ or irregular usage patterns and provide backup nitrogen vaporization capacity to ensure continuous product availability.

Onsite nitrogen supply agreements typically include an initial supply period of seven to ten years. These arrangements minimize customer investment and customer involvement in nitrogen generator operations and maintenance.  They give the customer the same kind of utility-like supply that is associated with all liquid nitrogen supplies - but at lower cost.

  Click here to learn more about UIG onsite gas
supply options for nitrogen and oxygen users

Nitrogen users that consume less than 10,000 SCFH will normally maximize their cost savings by purchasing a nitrogen PSA generator. In these cases, UIG can provide assistance with installation, as well as monitoring and maintenance services, if desired.   


A range of models provide low first cost and low operating cost:


UIG can provide nitrogen PSA models sized for a wide range of production rates and product purities.  Units can be provided that to produce nitrogen at any purity from 95% to >99.5%; as set by user needs.  By operating the nitrogen generator to produce the required purity required for the application, but not over-purifying, savings will be maximized. 

99.5% purity product can be produced at rates as low as 200 SCFH (5 Nm3/h) or as high as 1000 Nm3/hr (38,000 SCFH). 

Typical delivery pressures are in the range of 6 to7 Bar(g) (87 to 102 psig).  Higher pressures are available with the aid of a booster compressor.  Units are designed for outdoor or indoor installation.  Specific features to accommodate extreme weather conditions, hazardous environments, cylinder filling and other situations are available.

Nitrogen can be produced at very high purity (e.g. 99.999%) by adsorption or, often more cost-effectively, by a two-step process that couples a 99.5% purity PSA with a "de-oxo" unit to reduce residual oxygen to the required level.


Nitrogen PSA System Features:

  • Compact, modular, well-proven design
  • Automatic, unattended operation with advanced monitoring and control system
  • Low specific power
  • Low maintenance
  • Higher capacity units can be UIG owned and operated to provide hassle-free, low-cost onsite-produced nitrogen.
  • All units are available for purchase, with lease-purchase as an option

Universal Industrial Gases, Inc.
2200 Northwood Ave. Suite 3
Easton, Pennsylvania 18045-2239 USA

Phone (610) 559-7967 Fax (610) 515-0945

All material contained herein Copyright 2003 / 2005 UIG.