By Vvon Engineering Team | Published | Updated
Compare gas purity, flow, pressure, utilities and operating costs before selecting Oxymat on-site oxygen or nitrogen generation for an industrial or laboratory process.
Scientific & laboratory RFQ checklist (TXT)
On-site oxygen or nitrogen generation can be considered alongside delivered gas when an industrial or laboratory process has a defined consumption profile. Vvon’s scope here is industrial and laboratory gas equipment; hospital medical-gas systems and patient oxygen pipelines are outside our services.
The hatchery and aquaculture oxygen buying guide compares compact configurations and explains the gas-demand, receiving-equipment and backup information to prepare. This broader article addresses industrial and laboratory oxygen/nitrogen supply.
For a small instrument-level nitrogen supply, use the laboratory nitrogen generator buying guide. It compares existing BIOBASE and Infitek families against the receiving instrument's gas specification and distinguishes external-air from compressor-equipped packages.
PSA uses alternating adsorption and regeneration cycles. Oxygen systems commonly use a zeolite that preferentially retains nitrogen; nitrogen PSA systems use carbon molecular sieve to preferentially retain oxygen. Feed pressure, treatment and cycle design depend on the selected model. Obtain guaranteed product flow and quality at the agreed site conditions.
Meet the selected generator’s compressed-air quality requirements for particles, water and oil at the inlet. Obtain the exact ISO 8573-1 classes, pressure and temperature from the current model document, then size compressor, dryer and filtration for the actual site. Do not apply one air-quality class indiscriminately to all equipment.
The second thing the air side decides is the electricity bill. The generator itself draws very little. The compressor is the load, which is why the economics are really a comparison between your electricity tariff and the delivered price of gas, not between two pieces of equipment.
Build the comparison from your recorded average/peak demand, operating hours, delivered-gas invoices and actual electricity tariff. Include compressor and dryer power, installation, receivers, any booster or purifier, consumables, maintenance and backup supply. There is no universal consumption threshold or payback period for Bangladesh.
Oxymat describes PSA oxygen options at up to 95% purity. This is distinct from nitrogen: its nitrogen range includes configurations up to 99.9999%. Purity and available flow depend on the model and conditions. A nominal percentage does not establish trace moisture, oxygen, hydrocarbon or other impurity limits required by a process.
| Requirement | Catalogue direction | Evidence needed |
|---|---|---|
| Oxygen for a compatible industrial process | O60/O200, compact or other offered oxygen configuration | Required oxygen concentration, impurity limits, flow at that purity, outlet pressure |
| Nitrogen for inerting or purge | N60/N200 or another offered PSA/membrane configuration | Residual oxygen and moisture limits, operating duty and guaranteed flow |
| Very low residual oxygen | Suitable PSA configuration or NH20–400 purification package | Complete inlet/output quality specification, purifier utilities and verification |
| Space or noise constraints | Compact, silenced, in-frame or containerised configuration | Installed footprint, heat rejection, ventilation, access and services |
Packaging matters as much as capacity when the site is constrained. The wider range of twenty-two units includes the O200 and O60 Nordic Supreme variants, half-pallet nitrogen units, twin-tower oxygen and nitrogen generators, compact integrated PSA generators with the compressor built in, silenced versions of the same for installation near occupied areas, and X-series frame-mounted generators. For sites with no plant room at all, or for a project phase where the building is not ready, containerised and in-frame installations put the whole plant outside on a slab.
For oxygen, confirm that the process can use the concentration and trace-impurity profile produced by the proposed system. Combustion analysis, calorimetry, ozone generation and other applications can have different requirements. Do not connect a generator to an analytical instrument solely because both use oxygen.
Oxymat’s NH 20–400 purifier is a separate purification stage using controlled hydrogen addition to reduce residual oxygen. Its gas, moisture, utility and safety requirements need review with the full system. “Higher purity” is not permission to omit impurity-by-impurity compatibility checks.
Laboratory enquiries may include instrument purge, controlled atmospheres or process development. Obtain the consuming equipment’s specification for gas grade, trace impurities, pressure and peak flow, including startup and purge demand. HPLC uses a liquid mobile phase; do not describe nitrogen as its carrier gas. Some LC/MS systems use nitrogen for source functions, but that requires the mass-spectrometer manufacturer’s specific gas requirements.
Delivered gas may remain preferable for low or intermittent demand, required qualities beyond the proposed package, or sites unable to support the utilities and maintenance. Even with on-site generation, assess reserve supply and safe shutdown. Generation does not automatically eliminate cylinders or every gas-handling risk.
Confirm the complete scope in the offer: generator, compressor, dryer, filters, receivers, pipework, any booster/purifier, monitoring, commissioning and training. Installation duration, warranty and service intervals depend on the configuration and site readiness; agree them rather than assuming a plug-and-play installation.
Verify the specified gas quality at agreed sampling points, including the point of use where needed. Define the measurement method, analyser calibration and response to off-specification gas. Use documented inspection and maintenance intervals for the complete system.
Share your application, equipment requirements and procurement timeline. Our engineers can help clarify the configuration and scope for your enquiry.