PSA Nitrogen Generator 99.9–99.99% Purity
A CMS twin-tower PSA nitrogen generator for process blanketing and purging duty: 99.9–99.99% N₂ at 1–2000 Nm³/h with a -40°C dew point.
This PSA nitrogen generator produces nitrogen at 99.9–99.99% purity using carbon molecular sieve (CMS) in a twin-tower pressure swing adsorption system.
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, and the towers alternate between adsorption and regeneration for a continuous supply.
At this tier oxygen ingress is held low enough for process blanketing and purging where moisture and oxygen both have to be excluded, including oil and gas equipment.
It is used for chemical blanketing, pipeline purging, oil and gas inerting and pharmaceutical packing.
| Parameter | Specification |
| Purity | 99.9–99.99% 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 | Chemical blanketing, pipeline purging, oil and gas inerting and pharmaceutical 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.
- Chemical blanketing: blankets chemical process vessels with high-purity nitrogen to exclude oxygen and moisture.
- Pipeline purging: purges pipelines and vessels to remove oxygen and moisture before commissioning or start-up.
- Oil and gas inerting: inerts oil and gas equipment and vapour spaces to reduce oxygen content.
- Pharmaceutical packing: provides nitrogen for pharmaceutical packing and product protection.
- Petrochemical storage: covers tank and vessel blanketing in petrochemical plants.
- Metal and electronics pre-treatment: supports furnaces and processes that need a controlled atmosphere.
- Confirm the required purity, because higher purity reduces the nitrogen flow available from the 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 and confirm the feed air is oil-free with a dew point of -40°C or lower.
- Confirm whether a residual-oxygen limit is specified by the process, since that determines whether this tier is sufficient.
- State the operating hours and the number of purge cycles per day when the duty is intermittent.
- Plan a small liquid-nitrogen backup where an interruption to the blanket would stop production.
What purity does this generator provide?
It provides nitrogen at 99.9–99.99% purity using CMS twin-tower PSA, with flow from 1 to 2000 Nm³/h.
Where is 99.9–99.99% nitrogen used?
For chemical blanketing, pipeline purging, oil and gas inerting and pharmaceutical packing.
What pressure and dew point does it deliver?
Outlet pressure is adjustable from 0.1 to 1.0 MPa and the dew point is -40°C or lower.
Why is purity and flow always quoted together?
Raising the purity increases the feed air consumed, so the achievable nitrogen flow falls for the same skid size; the two figures must be read as a pair.
What feed air does it need?
Clean, oil-free compressed air at 0.6–0.8 MPa with a dew point of -40°C or lower, conditioned by the air dryer and filtration stages.
Related Products
- PSA Nitrogen Generator 99–99.9% Purity
- PSA Nitrogen Generator 99.99–99.999% Purity
- PSA Nitrogen Generator
How to Choose a 99.9–99.99% PSA Nitrogen Generator
Quick answer: This tier suits chemical blanketing, pipeline purging and oil and gas inerting: 99.9–99.99% N₂ at 1–2000 Nm³/h, 0.1–1.0 MPa and a -40°C dew point. Size to average demand and confirm the feed-air quality.
Where does the 99.9–99.99% tier fit?
Between the food-grade tier and the ultra-high-purity tiers: it is the published range for chemical blanketing, pipeline purging, oil and gas inerting and pharmaceutical packing, where oxygen and moisture must both be excluded.
How do I size the generator?
Size to the average continuous demand and quote nitrogen flow and purity together, because higher purity reduces the flow available. The PSA nitrogen generator guide explains the sizing and the flow/purity relationship.
What is needed on site?
Compressed air at 0.6–0.8 MPa, dew point -40°C or lower and oil-free, with power and space for the skid, dryer, filtration and air receiver.
Selection Data to Send Our Engineers
- Required N₂ flow (Nm³/h)
- Required nitrogen purity
- Outlet pressure (MPa)
- Dew point requirement
- Feed-air quality and supply
- Operating hours and cycle frequency
Industry Applications
Explore how this equipment can be applied in related industrial sectors and review application-specific selection guidance.