PSA Nitrogen Generator 99–99.9% Purity
A CMS twin-tower PSA nitrogen generator for food-safe blanketing and MAP packaging: 99–99.9% N₂ at 1–2000 Nm³/h and a -40°C dew point.
This PSA nitrogen generator produces nitrogen at 99–99.9% purity using carbon molecular sieve (CMS) in a twin-tower pressure swing adsorption system, with the two towers alternating to give a continuous supply.
Flow ranges from 1 to 2000 Nm³/h with outlet pressure from 0.1 to 1.0 MPa and a dew point of -40°C or lower.
The 99–99.9% tier holds oxygen low enough to protect food and beverage products from oxidation without the feed-air consumption of the higher-purity tiers.
It is used for food MAP packaging, beverage blanketing, edible oil protection and snack packing.
| Parameter | Specification |
| Purity | 99–99.9% N₂ |
| Flow | 1–2000 Nm³/h |
| Outlet pressure | 0.1–1.0 MPa (adjustable) |
| Dew point | -40°C or lower |
| Adsorbent | Carbon molecular sieve (CMS) |
| Technology | CMS twin-tower PSA (carbon molecular sieve), continuous on-site supply |
| Feed air | 0.6–0.8 MPa, dew point ≤-40°C, oil-free |
| Startup time | ≤30 minutes to rated purity |
| Control | PLC automatic; optional HMI touch screen |
| Typical duty | Food MAP packaging, beverage blanketing, edible oil protection and snack packing |
The PSA nitrogen range is published as a purity and capacity configuration rather than a numbered model table: fix the purity tier first, then the flow, outlet pressure and dew point for the duty.
- Adsorption towers: two adsorber vessels alternate between adsorption and regeneration, so the nitrogen supply is continuous.
- Molecular sieve: carbon molecular sieve (CMS) retains oxygen at pressure while nitrogen passes through as product gas; when a bed approaches saturation it is depressurised and the captured oxygen is vented.
- Air dryer: the package includes an air dryer that brings the compressed-air moisture load down so the feed-air dew point requirement is met before the air reaches the sieve bed.
- Filtration: filtration stages remove oil aerosol and dust carried over from the compressor and receiver, protecting the sieve bed.
- Air receiver: a buffer tank (air receiver) between the compressor and the PSA towers steadies the feed-air supply.
- Control cabinet: PLC automatic control with an optional HMI touch screen; the control cabinet manages the valve cycle and the operating parameters.
- Purity monitoring: an oxygen analyser monitors residual oxygen in the product nitrogen, and its calibration is checked on schedule.
- Feed air: clean compressed air at 0.6–0.8 MPa with a dew point of -40°C or lower, oil-free.
- Food MAP packaging: supplies nitrogen for modified atmosphere packaging of food, where residual oxygen drives shelf life.
- Beverage blanketing: blankets beverages and tanks to protect them against oxidation.
- Edible oil protection: inerts edible oil storage and handling to reduce oxidation and rancidity.
- Snack packing: provides nitrogen for snack packaging lines and flushing before sealing.
- Food storage and transport: supports controlled-atmosphere storage and transport of perishable goods.
- Pharmaceutical and nutraceutical packing: covers packaging duties where a controlled oxygen level is needed.
- Confirm the required purity, because higher purity reduces the achievable flow from a given CMS charge.
- Check the flow and outlet pressure against the 1 to 2000 Nm³/h and 0.1 to 1.0 MPa ranges.
- Specify the dew point requirement; the system delivers -40°C or lower.
- Confirm the feed air is oil-free with a dew point of -40°C or lower, since air quality directly affects product purity.
- State the operating hours and whether the supply is continuous or shift-based, so the skid is sized to average demand rather than peak.
- For critical lines, plan a small liquid-nitrogen backup to cover maintenance windows.
What purity does this generator produce?
It produces nitrogen at 99–99.9% purity using CMS twin-tower PSA, with flow from 1 to 2000 Nm³/h.
What is 99–99.9% nitrogen used for?
Food MAP packaging, beverage blanketing, edible oil protection and snack packing, as well as storage and transport duties.
What outlet pressure and dew point are available?
Outlet pressure is adjustable from 0.1 to 1.0 MPa and the dew point is -40°C or lower.
Why does purity affect the flow I can get?
Higher purity means more feed air is consumed and less nitrogen is produced per Nm³ from the same sieve charge, so purity and flow are always quoted together.
What feed-air quality is needed?
Clean, oil-free compressed air at 0.6–0.8 MPa with a dew point of -40°C or lower, protected by dryer and filtration stages.
Related Products
- PSA Nitrogen Generator 95–99% Purity
- PSA Nitrogen Generator 99.9–99.99% Purity
- PSA Nitrogen Generator
How to Choose a Food-Grade PSA Nitrogen Generator
Quick answer: Food-grade PSA nitrogen is selected from purity, flow, outlet pressure and dew point. The 99–99.9% tier suits MAP packaging and beverage blanketing where oxidation must be controlled.
Which purity does food packaging need?
The 99–99.9% tier is the published range for modified atmosphere packaging and beverage blanketing. Confirm the residual oxygen the product actually tolerates, because going higher costs more feed air per Nm³ of nitrogen.
How is the generator sized?
Size to the average nitrogen demand of the line, not the peak, and quote flow and purity together. The PSA nitrogen generator guide sets out the sizing method and the air-quality requirement.
What has to be true of the feed air?
It must be clean, oil-free and dry: 0.6–0.8 MPa with a dew point of -40°C or lower, protected by an air dryer, filtration stages and an air receiver.
Selection Data to Send Our Engineers
- Required N₂ flow (Nm³/h)
- Required nitrogen purity for the product
- Outlet pressure (MPa)
- Dew point requirement
- Feed-air quality and supply
- Operating hours and site conditions
Industry Applications
Explore how this equipment can be applied in related industrial sectors and review application-specific selection guidance.