Nitrogen Generators
On-Site Nitrogen Generation for Reliable, Safe and Cost-Effective Gas Supply
Generate nitrogen on demand with fully integrated systems designed for industrial process control, safety and efficiency.
Over 45 Years in Operation
1000's of UK Installations
Supporting 100's of UK Sites
Nitrogen generators produce high-purity nitrogen gas directly from compressed air, providing a reliable and continuous on-site supply.
Nitrogen is widely used across industrial processes as an inert gas for blanketing, purging and process control. Traditionally supplied via cylinders or bulk liquid deliveries, many operators are now moving towards on-site nitrogen generation to improve reliability, reduce costs and eliminate logistical challenges.
Modern nitrogen generators use Pressure Swing Adsorption (PSA) technology to separate nitrogen from compressed air, producing a continuous and controllable supply. This process works by adsorbing oxygen and other gases onto a carbon molecular sieve, allowing nitrogen to pass through as the product gas.
Allison Engineering supplies nitrogen generation systems as part of complete process solutions, supporting applications such as Nitrogen Purge & Blanketing Monitoring, Hydrogen Flow Measurement for Industrial Applications and Gas-to-Grid Upgrading where controlled gas environments are critical.
Nitrogen Generator Products
Our nitrogen generation solutions are based on proven PSA technology and are available in a range of configurations depending on flow rate, purity and application requirements.
PSA Nitrogen Generator Systems
PSA (Pressure Swing Adsorption) nitrogen generators produce nitrogen by separating it from compressed air.
These systems alternate between adsorption and regeneration, ensuring a continuous nitrogen supply with high purity levels.
VSA Optimised Nitrogen Systems
For higher flow applications where vacuum-based or optimised systems may be used depending on process requirements.
These systems offer lower operating costs at scale and are often selected for larger industrial installations or continuous duty applications.
Why Choose Nitrogen Generators
On-site gas independence
Eliminates reliance on delivered cylinders or bulk liquid nitrogen, improving supply reliability and reducing logistical risks.
Cost-effective operation
Significantly reduces long-term gas costs by generating nitrogen on demand from compressed air.
High purity nitrogen supply
Capable of producing nitrogen at a wide range of purities depending on application requirements, from general blanketing to high-spec processes.
Continuous and reliable production
Twin-tower PSA systems provide uninterrupted nitrogen generation for critical industrial processes.
Flexible system design
Available in modular configurations to suit different flow rates, purities and installation environments.
Low maintenance and automation
Modern systems are fully automated with minimal maintenance requirements, supporting long-term reliable operation.
Suitable for Multiple Industry Sectors
Biogas & Renewable Energy
Used in upgrading systems and process control where controlled gas environments are required.
Food & Beverage
Used for packaging, preservation and process control where oxygen exclusion is required.
Pharmaceutical
Ensures clean, controlled environments where contamination and oxidation must be avoided.
Chemical & Process
Supports controlled atmospheres in reactors, storage systems and process lines.
Oil & Gas
Used for inerting, purging and blanketing to improve safety and prevent explosive atmospheres.
Hydrogen & Energy
Supports inerting and safety systems in hydrogen production, storage and handling applications.
Need information or advice?
Speak with our friendly, expert team to discuss your requirements and find out how we can help you.
Full Service UK Solutions
Allison Engineering provides complete nitrogen generation solutions, from system selection through to long-term support.
Specifications & Planning
Assessment of flow rate, purity requirements and process conditions to define the correct system based on process conditions and requirements.
Supply & Commissioning
Product supply, installation and first fit support, commissioning and full setup to ensure generators are working correctly in the field.
Support & Optimisation
Ongoing UK based servicing, calibration, maintenance and technical support to keep generators accurate and systems performing reliably over time.
Nitrogen Generator FAQs
Explore common questions about nitrogen generation, including how systems work and how to select the right solution.
How does a nitrogen generator work?
A nitrogen generator uses compressed air and PSA technology to separate nitrogen from oxygen and other gases. The system uses carbon molecular sieves to adsorb unwanted gases, allowing nitrogen to pass through as the product gas.
What are the benefits of on-site nitrogen generation?
From experience, the biggest advantages are cost savings, reliability and independence from external gas suppliers. It also removes the need for handling and storing high-pressure cylinders.
What purity levels can be achieved?
Nitrogen generators can produce a wide range of purities depending on the application, typically from around 95% up to 99.999% for high-spec processes.
What industries use nitrogen generators?
They are widely used across oil & gas, chemical, pharmaceutical, food and beverage, energy and manufacturing industries.
How do I choose the right nitrogen generator?
Selection depends on required flow rate, purity, pressure, application and installation conditions. The best approach is to review the process requirements and match them to the appropriate system.
Are biogas analysers suitable for harsh environments?
Yes, biogas analysers are designed for use in challenging environments where gases may be wet, corrosive or variable in composition.
Industrial designs, protective enclosures and application-specific configurations ensure reliable operation in real-world conditions.
How do I choose the right biogas analyser?
Choosing the right analyser depends on:
- the gases to be measured
- number of measurement points
- process conditions
- installation location
- whether fixed or portable measurement is required
For example, a single-point analyser may suit simple monitoring, while multi-channel systems are better for larger or more complex plants.
The best approach is to review the application and match the analyser to the process requirements.
Why choose Allison Engineering for biogas analysers?
Allison Engineering has extensive experience supporting biogas and renewable gas applications across the UK, with a strong installed base and long-term customer relationships.
Our range includes single-point, multi-channel and portable analysers, allowing us to support everything from simple monitoring through to complex multi-point systems.
Combined with application knowledge, technical support and ongoing service capability, we help customers select and maintain the right solution for their site.
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Why Trust Allison Engineering
We are committed to delivering the highest standards across the specialist areas we support, combining proven products with practical engineering knowledge and dependable service.
Need Help with Nitrogen Generation?
Speak to our team to identify the right nitrogen generation solution for your application, ensuring reliable supply, improved safety and long-term cost savings.