To choose a nitrogen generator correctly, it is essential to start from the actual requirements of the production process.
There is no one-size-fits-all solution. The right configuration depends on factors such as nitrogen demand, required purity, operating pressure, flow rate and how the gas is used during production.
Choosing the generator with the highest capacity or purity does not necessarily mean achieving better performance. A properly sized system should provide the required amount of nitrogen while avoiding unnecessary compressed air consumption and excessive operating costs.
So, what should you consider when choosing the right industrial nitrogen generator?
When Does On-Site Nitrogen Generation Make Sense?
Producing nitrogen directly at your facility means having gas available where it is needed while reducing dependence on cylinders, liquid nitrogen tanks and external suppliers.
On-site generation becomes particularly interesting when nitrogen consumption is regular or continuous and gas availability is essential to the production process.
However, the decision should always be based on actual consumption and the specific requirements of the plant.
To learn more about on-site production, read our guide on how a nitrogen generator works and when on-site nitrogen generation makes sense.
How to Choose and Size a Nitrogen Generator
One of the most common mistakes is choosing a generator based only on its nominal flow rate.
Average consumption is certainly an important figure, but it does not provide a complete picture of the plant’s actual nitrogen demand. Peak demand, simultaneous use by multiple systems, operating hours and potential future increases in production should also be considered.
An undersized system may not be able to meet demand during peak periods. On the other hand, an oversized generator can result in a higher initial investment and inefficient use of resources.
Proper sizing therefore starts with an analysis of the actual consumption profile, rather than simply choosing the model with the highest flow rate.
Key Factors When Choosing a Nitrogen Generator
Nitrogen purity should always be defined according to the application.
Automatically selecting the highest available purity does not necessarily result in a more efficient system. In PSA generators, purity, available flow rate and compressed air consumption are closely related.
We explored this topic in our guide to nitrogen purity and the correct configuration of a Nitro Series generator.
The pressure required by the process must also be considered from the beginning. Flow rate, purity and pressure should therefore be evaluated together to identify the most suitable system configuration.
Why Compressed Air Matters
In PSA nitrogen generators, compressed air is the raw material used to produce nitrogen. This means that the generator cannot be considered separately from the existing compressed air system.
Before installation, it is important to assess compressor capacity, air quality, available pressure and supply continuity.
An inadequately sized compressed air system can limit generator performance and reduce the overall efficiency of the installation.
PSA or Membrane Technology?
The two main technologies used for on-site nitrogen generation are PSA (Pressure Swing Adsorption) and membrane separation.
PSA technology uses Carbon Molecular Sieves (CMS) to separate oxygen from compressed air and provide a continuous nitrogen flow. It is particularly suitable for applications requiring high purity levels and continuous production.
Membrane systems use selective membranes to separate gases and can be suitable for applications with different operating requirements.
The choice should therefore be based on the needs of the process rather than on the technology alone.
ILT Energia Nitro Series nitrogen generators use PSA technology and are configured according to actual operating requirements.
Consider Peak Nitrogen Demand
Nitrogen consumption is not always constant throughout the working day.
Some processes alternate between normal operating periods and phases where demand increases significantly. Sizing a system solely on average consumption may therefore result in a configuration that cannot meet actual production needs.
Analysing peak demand helps maintain continuity during periods of higher consumption and prevents performance drops precisely when nitrogen demand is at its highest.
Common Mistakes When Choosing a Nitrogen Generator
Choosing the highest purity “just to be safe”, looking only at nominal flow rate or comparing systems solely on their initial purchase price can all lead to inefficient sizing.
The same applies when operating pressure, peak demand or available compressed air capacity are overlooked.
The real question is therefore not simply “Which generator produces the most nitrogen?”, but rather “Which configuration best meets the requirements of my process?”
How ILT Energia Sizes Nitro Series Nitrogen Generators
When configuring a Nitro Series generator, ILT Energia starts from the actual operating conditions of the plant.
Flow rate, nitrogen purity, pressure, average consumption, peak demand, operating hours and compressed air availability are assessed together.
The aim is to find the right balance between performance, operational continuity and efficiency, avoiding both undersized systems and configurations that exceed the plant’s actual requirements.
Discover ILT Energia Nitro Series nitrogen generators.
Frequently Asked Questions
How Do I Choose the Right Nitrogen Generator?
The choice depends on the actual requirements of the plant. Flow rate, purity, pressure, consumption profile and compressed air availability should all be evaluated together.
Is a Higher-Flow Nitrogen Generator Always Better?
No. An oversized system can increase the initial investment without providing any real benefit under normal operating conditions.
Is PSA or Membrane Technology Better?
It depends on the application. PSA technology is particularly suitable when high nitrogen purity and continuous production are required.
How Important Is Nitrogen Purity?
Purity is an important parameter, but it should be defined according to the actual process requirements. Specifying a higher purity than necessary can affect available flow rate and compressed air consumption.
Conclusion
Choosing a nitrogen generator starts with understanding the production process.
Flow rate, purity and pressure are essential parameters, but they should be considered together with the consumption profile, peak demand and the characteristics of the compressed air system.
This is the approach ILT Energia uses to configure its Nitro Series generators, with the aim of supplying the amount and quality of nitrogen actually required by each process.
Are you considering on-site nitrogen generation or would you like to check whether your system is correctly sized? Contact ILT Energia to discuss your requirements with our technical team.
