Start with verified duty data
Do not size solely from an existing nameplate or supplier invoice. Record average and peak demand, duration, purity, pressure, dew point, environment and planned expansion.
NITRAISE KNOWLEDGE CENTER
How to Size a Nitrogen Generator
Build a reviewable duty from average and peak flow, purity, pressure, dew point, operating hours and site conditions.
Define normal, peak and failure cases
Continuous demand, batch peaks, start-up purging and backup duty need separate calculations to define trains, storage and backup connection.
Write acceptance into the specification
Define reference basis, instrument accuracy, sampling point, stabilisation, test duration and off-spec handling before delivery.
FREQUENTLY ASKED QUESTIONS
Questions procurement and engineering teams ask
How does a nitrogen generator work?
A nitrogen generator separates nitrogen from compressed air using PSA or membrane technology. The correct method depends on purity, flow, pressure, environment and operating profile.
What information is needed for sizing?
Average and peak flow, minimum acceptable purity, outlet pressure, dew point, operating hours, ambient temperature, altitude, power supply, redundancy and applicable standards.
What affects nitrogen generator cost?
Flow, purity, pressure, compressor and air treatment scope, redundancy, enclosure, hazardous-area design, certification, logistics, commissioning and acceptance requirements.
Is on-site nitrogen cheaper than delivered nitrogen?
It can be for stable consumption, but the answer depends on actual annual volume, delivered-gas price, electricity, maintenance, financing and backup supply. Use a lifecycle model, not a headline percentage.
Does higher purity use more energy?
For the same technology and feed conditions, higher purity usually requires more feed air or reduces product flow. Specify the lowest purity that safely meets the process requirement.
Can the system run continuously?
Industrial systems can be engineered for continuous duty, but reliability depends on air quality, redundancy, maintenance access, ambient conditions and control strategy.
Can a nitrogen generator be containerized?
Yes. Ventilation, heat rejection, access, lifting, fire safety, hazardous-area requirements and local climate must be engineered into the container.
How is project performance accepted?
The technical agreement should define reference conditions, calibrated instruments, sampling point, stabilisation time, flow, purity, pressure, dew point and test duration.