Reorder & Replacement
Nitrogen Generator Filters & Replacement Kits
Every on-site nitrogen generator depends on clean, dry compressed air. Gas Generation Solutions supplies the replacement filter elements and complete filter maintenance kits that keep your system delivering high-purity nitrogen. Tell us your model number and serial number, and we match the correct kit. No filter part numbers to look up.
Particulate, coalescing, carbon
Correct elements for your system
Purity clean filtration protects
System service life
Replacement filters and maintenance kits for your nitrogen generator
This is the reorder page for owners of on-site nitrogen generators. When it is time to change your filters, we supply the replacement filter elements and the complete filter maintenance kit that fits your system, so your generator keeps producing high-purity nitrogen at the purity you sized it for.
You do not need to look up any filter part numbers. Send us your generator's model number and serial number, and we identify the correct particulate, coalescing, and activated carbon elements and ship the matching kit. Ordering the kit is usually more economical than buying elements one at a time, and it means every element in the filtration train is replaced together instead of one at a time.
Filters are what protect your investment. The pressure swing adsorption media inside a nitrogen generator is designed to run for 20 years or more, but only if the compressed air reaching it stays free of particulates, oil aerosols, and hydrocarbon vapor. Clean filtration is also what holds your purity in spec and keeps a downstream point of use filter from loading up too quickly.
The filtration train on an on-site nitrogen generator
Compressed air from your receiver passes through staged filters before it ever reaches the nitrogen-producing media. Each stage removes a different contaminant, and each stage is replaced with the matching element in your kit.
Stage 1
Particulate filter
Catches solid particles, rust, and pipe scale carried in from the air receiver and piping, protecting the finer filters downstream.
Removes solids to roughly 1 micron
Stage 2
Coalescing filter
Merges fine oil aerosols and water mist into droplets that drain away, removing the liquid contamination that would foul the media and drift your purity.
Coalesces oil aerosols to roughly 0.01 micron
Stage 3
Activated carbon filter
Adsorbs the hydrocarbon vapor and oil odor that pass straight through the earlier stages as a gas. It sits last so the liquid load is already gone.
Adsorbs oil vapor and hydrocarbons
Inside the generator there is more protection: multiple levels of inlet air filtration, the adsorption media itself acting as a final filter, and a fail-safe output filter that catches any residual carbon dust before nitrogen leaves the system. This layered filtration is why a Gas Generation Solutions nitrogen generator does not require an oil-free air compressor.
What a filter maintenance kit includes
A nitrogen generator filter kit is built for your specific system, so the exact contents depend on your model and configuration. A typical filter maintenance kit for an on-site nitrogen generator includes:
- Particulate element for the first-stage solids filter.
- Coalescing element for the oil-aerosol and moisture stage.
- Activated carbon element for the final hydrocarbon-vapor stage.
- Drain and seal parts where your system uses them, such as auto-drain components and element o-rings.
Ordering the complete kit is usually more economical than buying elements individually, and it keeps the whole filtration train on the same replacement cycle. If you only need a single element, we can supply that too. Either way, we match it to your system so you are not cross-referencing part numbers on your own.
When to replace nitrogen generator filters
Many owners change their filter elements about once a year, but the right interval depends on your compressed air quality, your duty cycle, and the hours the system runs. A generator on a single shift in a clean plant loads its filters far more slowly than one running continuously behind a hard-working compressor. These are the signals worth watching:
Time in service
You have reached the replacement interval set for your system, or it has been about a year since the last change.
Rising pressure drop
A loaded element restricts flow. A climbing pressure drop across the filters means they are near the end of their life.
Purity drifting
If your built-in oxygen analyzer shows purity slipping, saturated filters passing oil or moisture can be the cause.
After a compressor event
Oil carryover or a moisture event on the air side can overload the filters early. Change them once the source is fixed.
Changing filters is straightforward. Leave about 3 to 4 feet of clearance in front of the generator so the elements can be reached, and keep a spare kit on the shelf so you are never waiting on a delivery to bring purity back in spec. Not sure of the interval for your system? Tell us how it runs and we will help you set one.
Nitrogen generator filter questions
What filters does an on-site nitrogen generator use?
Compressed air passes through a staged filtration train before it reaches the nitrogen-producing media: a particulate filter for solids, a coalescing filter for oil aerosols and moisture, and an activated carbon filter for hydrocarbon vapor. Inside the generator there is further inlet filtration and a fail-safe output filter. A downstream point of use filter is often added at the application. Each stage uses a replaceable element that we can match to your system.
How often do nitrogen generator filters need to be replaced?
Many owners replace their elements about once a year, but the correct interval depends on your compressed air quality, duty cycle, and run hours. Rising pressure drop across the filters, purity drift on your oxygen analyzer, or an oil carryover event from the compressor are all reasons to change them sooner. Tell us how your system runs and we can help you set a schedule.
Should I order individual elements or a complete filter kit?
A complete filter maintenance kit is usually more economical than buying elements one at a time, and it keeps the whole filtration train on the same replacement cycle. If you only need to replace a single element, we can supply that as well. We match either to your specific generator.
What do you need to know to send the right filter kit?
Tell us your generator's model number and serial number. That is enough for us to identify the correct particulate, coalescing, and carbon elements and ship the matching kit. You do not need to look up any filter part numbers.
Do your nitrogen generators require an oil-free air compressor?
No. The staged filtration train removes oil aerosols and vapor before the air reaches the media, and a fail-safe output filter protects the nitrogen side. Keeping those filters on schedule is what lets a standard air compressor feed the generator safely.
Do you supply filters for older Gas Generation Solutions nitrogen systems?
Yes. Give us the model number and serial number from your generator and we will match the correct replacement filter elements and maintenance kit, including for older units. If you cannot find those numbers, contact us with a photo of the model plate and we will identify them.
Reorder Made Simple
Send us your system, we match the kit
Tell us your generator's model number and serial number, and we will match the correct filter elements or a complete filter maintenance kit and get them shipped. Not sure where to find them? Send a photo of the model plate and we will identify it for you.