Oxygen Generators
Oxygen generators and concentrators are used in environments that require a continuous supply of high-purity oxygen. These systems are a far more efficient and safer alternative to traditional oxygen cylinders. If your need for pure oxygen is constant, the most economical and profitable solution is purchasing your own oxygen station, as it produces oxygen with up to 95% purity on site (with a capacity from 0.5 to 500 Nm³/h).
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What is an oxygen generator?
An oxygen generator (oxygen concentrator) is a unit that separates oxygen from ordinary compressed air right on site. Atmospheric air is 21% oxygen and 78% nitrogen; PSA technology (Pressure Swing Adsorption) traps the nitrogen in zeolite molecular sieves and delivers 90–95% pure oxygen at the outlet — continuously, as long as the compressor supplies air. No cylinders, no cryogenic tanks, no delivery logistics.
One oxygen generator replaces hundreds of cylinders a year, and the plant no longer depends on a supplier — oxygen is produced when and in the quantity the process needs.
How does a PSA oxygen generator work?
The system consists of two adsorbers. Compressed, dried and filtered air enters the first adsorber: the zeolite holds back nitrogen, carbon dioxide and moisture, while oxygen passes into a buffer tank. While the first adsorber works, the second is depressurised and regenerated; after a few seconds they swap roles. The cycle is fully automatic and purity is monitored by a built-in oxygen analyser.
The complete chain: screw compressor → air receiver → dryer → filters → oxygen generator → oxygen receiver → (if required) a booster for filling cylinders at 150–200 bar.
Where oxygen generators are used
- Healthcare — central hospital oxygen systems, intensive care, operating theatres; 93% ±3% medical oxygen to ISO 10083. IESCO has installed such systems at the Infectious Diseases Hospital in Tbilisi and a clinic in Gori — see our projects.
- Aquaculture and fish farming — oxygenation of water, where fish growth and survival depend directly on dissolved oxygen.
- Metalworking — oxy-fuel cutting, welding, plasma-cutting assist gas, furnace enrichment.
- Ozone generators and water treatment — ozonation of drinking water and wastewater.
- Glass, cement, chemical and pharmaceutical production, biogas desulphurisation, laboratories.
Oxygen generator or cylinders — which is better?
| Criterion | PSA oxygen generator | Cylinders / cryogenic tank |
|---|---|---|
| Cost of 1 m³ of oxygen | 0.10–0.25 GEL (electricity) | 1.5–4 GEL + delivery and rental |
| Supply | continuous, on site | depends on logistics |
| Safety | low pressure (4–7 bar), no high-pressure cylinders stored | storage and handling of 150–200 bar cylinders |
| Purity | 90–95% (medical 93%) | 99.5%+ |
| Payback | usually 1–3 years | — |
If you do not need purity above 99.5% (a rare requirement — even medicine uses 93%), a generator is almost always cheaper.
How to select an oxygen generator
1. Capacity (m³/h or l/min) — add up the oxygen consumption of all users in the peak hour and add a 20–30% reserve. IESCO's range covers models from 3 to 250 m³/h.
2. Purity (%) — 90–95% for industry, 93% ±3% for medical use. The higher the purity, the more compressed air and energy each m³ of oxygen requires.
3. Pressure — the generator delivers 4–7 bar; if you need 10+ bar or cylinder filling, an oxygen booster is added.
4. Inlet air quality — PSA zeolite is "poisoned" by oil and moisture, so a dryer and filters (ISO 8573-1 class 1.4.1) are mandatory. Build the chain with our air purity configurator; more tools are in the Engineer's Corner.
Oxygen generator brands from IESCO
- INMATEC (Germany) — PSA oxygen generators 3–250 m³/h, medical and industrial series, the European quality benchmark
- OMEGA AIR (Slovenia) — compact and economical PSA systems 3–250 m³/h; IESCO is the exclusive distributor of OMEGA AIR in Georgia
Alongside oxygen we offer nitrogen generators — including IESCO's own series assembled in Georgia — and the complete compressed-air system: compressor, dryer, filtration, receivers, booster, medical gas piping. IESCO provides design, installation, validation, commissioning and service throughout Georgia.
🎯 Want to know how much you would save compared with cylinders? 📞 Call us: +995 32 206 01 00 or visit our showroom at 52 Avchala St., Tbilisi.
Frequently asked questions about oxygen generators
What purity does a PSA oxygen generator deliver?
Typically 90–95%; medical models deliver 93% ±3% (ISO 10083 / European Pharmacopoeia). The remainder is mostly argon, which passes through the zeolite together with oxygen. Purity above 99.5% is only achieved by cryogenic or special VPSA systems and is not needed by most processes.
How much compressed air does an oxygen generator consume?
About 10–14 m³ of compressed air (at 5–7 bar) per 1 m³ of 93% oxygen. That is why the compressor capacity is calculated together with the generator — IESCO does this calculation free of charge.
Can a generator supply a medical oxygen system?
Yes — medical PSA generators are built to ISO 7396-1 and ISO 10083, with a built-in oxygen analyser, a backup line and an alarm system. IESCO has installed such systems in several clinics in Georgia.
How quickly does an oxygen generator pay for itself?
Compared with cylinder supply — usually within 1–3 years, depending on consumption: 1 m³ of your own oxygen costs 0.10–0.25 GEL in electricity, while cylinder oxygen costs 1.5–4 GEL plus logistics.
What does an oxygen generator need to operate?
Clean, dry compressed air at 5–8 bar (compressor + refrigeration dryer + filters), a 230 V supply (only ~130 W for the controls) and an oxygen buffer receiver. The zeolite lasts 10+ years if the inlet air is clean.
Who installs and services the generator?
IESCO — design, delivery, installation, validation and scheduled service (filter changes, analyser calibration) throughout Georgia. ☎ +995 32 206 01 00, showroom at 52 Avchala St., Tbilisi.
