How Oxymat's Nordic PSA oxygen and nitrogen generators eliminate cylinder dependency, reduce gas costs by up to 70%, and provide a continuous, reliable gas supply for Bangladeshi hospitals, research laboratories, aquaculture farms and industrial plants.
Bangladesh's hospitals, research laboratories, aquaculture farms and industrial plants have historically depended on delivered compressed-gas cylinders or liquid oxygen dewars — a supply chain that is expensive, logistically fragile and increasingly unreliable as demand grows. Pressure Swing Adsorption (PSA) technology (first described in the Skarström patent of 1960), manufactured by Oxymat A/S of Denmark since 1978, offers a compelling alternative: generate oxygen or nitrogen continuously on-site from compressed air, at a fraction of the delivered-gas cost. Vvon Technologies Limited is the authorised partner for Oxymat in Bangladesh.
A PSA generator passes compressed air (typically 6–8 bar) through two columns packed with a molecular sieve adsorbent (zeolite for oxygen, carbon molecular sieve for nitrogen). The adsorbent selectively retains nitrogen (for O₂ production) or oxygen (for N₂ production), allowing the product gas to pass through at high purity. The two columns alternate between adsorption and regeneration cycles automatically, producing a continuous gas stream. The Oxymat Nordic series uses an optimised cycle algorithm that reduces compressed-air consumption by up to 40% compared to conventional PSA designs — the key driver of its low operating cost.
| Model | Type | Capacity | Purity | Key Application |
|---|---|---|---|---|
| O200 Nordic | Oxygen | Up to 84 Nm³/h | Up to 95% | Hospital medical O₂, aquaculture, ozone generation |
| O60 Nordic | Oxygen | Up to 21 Nm³/h | Up to 95% | Lab gas supply, wastewater treatment, laser cutting assist gas |
| Half-Pallet Nordic | Oxygen | 2–10 Nm³/h | Up to 95% | Small lab, clinic, field hospital |
| N200 Nordic | Nitrogen | 133–405 Nm³/h | Up to 99.5% | Inerting, blanketing, food packaging, electronics |
| Pallet N60 Nordic | Nitrogen | 21–90 Nm³/h | Up to 99.5% | Lab purge gas, laser cutting assist, pharmaceutical |
Bangladesh experienced acute medical oxygen shortages during the COVID-19 pandemic, exposing the vulnerability of cylinder-dependent supply chains. An Oxymat O200 Nordic PSA generator, sized to the hospital's peak demand (ICU, OT, ward piped supply), provides a continuous, autonomous oxygen supply that is independent of cylinder deliveries. The system operates 24/7, requires only a compressed-air supply and periodic molecular sieve replacement (every 5–7 years), and can be monitored remotely via Modbus. Oxymat's medical-grade systems carry CE marking and comply with ISO 7396-1 (medical gas pipeline systems) and ISO 10083 (with ISO 7396-1 for pipeline distribution systems) (medical oxygen generators).
University and industrial research labs use oxygen and nitrogen for a wide range of applications: oxygen for combustion analysis (bomb calorimetry, TGA/DSC), ozone generation, wastewater treatment pilot plants and aquaculture research tanks; nitrogen for glove box inerting, Schlenk line chemistry, HPLC carrier gas, laser cutting assist gas and electronics soldering. A single Oxymat O60 Nordic or Pallet N60 Nordic unit can supply an entire research building's gas manifold, eliminating the cylinder store, cylinder change labour and the safety risks associated with high-pressure cylinder handling.
The economics of PSA generation depend on the site's gas consumption rate, local electricity tariff and delivered-gas price. As a rule of thumb, PSA becomes cost-effective above approximately 3–5 Nm³/h of continuous consumption. At Bangladesh's current industrial electricity tariff (approximately BDT 8–10/kWh) and delivered oxygen cylinder price (approximately BDT 300–400/Nm³), a medium-sized hospital consuming 20 Nm³/h of oxygen can expect a simple payback of 2–4 years on an Oxymat O200 Nordic installation, with operating cost savings of 60–75% over delivered cylinders thereafter. Vvon Technologies can provide a site-specific financial model at the quotation stage.
Oxymat Nordic generators are skid-mounted, plug-and-play units that require only a compressed-air connection, electrical supply and product gas outlet. Installation typically takes 1–3 days. Vvon Technologies provides the full project scope: compressed-air quality assessment (ISO 8573-1 Class 1.4.1 required), piping design, electrical connection, commissioning, operator training and a 12-month warranty. Annual service contracts include filter replacement, dew-point measurement, purity verification and cycle-time optimisation. Request an Oxymat sizing study →