Oxygen Booster Compressor 0.1 MPa to 32 MPa · 0.7 to 150 m³/min
Oil-free reciprocating compressors for PSA oxygen plants, cylinder filling stations, steel mills and industrial gas systems. Built to API 618. Customised to your inlet conditions.
Our Oxygen Compressor Series
Reciprocating oxygen compressors for every pressure requirement — from low-pressure air separation output to high-pressure cylinder filling. All series share an oil-free compression platform and are sized to your specific inlet conditions.
Oil-free reciprocating compressors for boosting PSA or vaporised liquid oxygen to cylinder filling pressure. Multi-stage compression with inter-cooling for low discharge temperature. Noise level below 75 dB. Annual grease application only — no oil changes, no oil filters.
For steel mills, glass furnaces and large-scale chemical oxygen pipelines. Three-stage and four-stage configurations covering 55 kW to 1,200 kW. Designed for continuous 24-hour operation with low-speed drive for extended overhaul intervals.
Suited for laser cutting oxygen supply, glass oxy-fuel combustion, wastewater oxygenation and PSA distribution pipelines requiring 10–25 bar delivery pressure. Two-stage compression. Compact footprint for in-plant installation.
Primary-stage compressors for air separation unit oxygen output and PSA plant distribution at 2–8 bar. Single-stage and two-stage configurations. Power range 11 kW to 1,200 kW, covering the widest flow range in our portfolio.
Engineering-grade boosters for large air separation units and EPC projects. Skid-mounted packages available. API 618 compliant. Custom inlet pressure accepted — including boosting from an already pressurised oxygen line at 0.17 MPa or higher.
Same engineering platform as our oxygen cylinder filling series. Available for nitrogen (N₂) and hydrogen (H₂) cylinder filling to 150 bar or 165 bar. Oil-free lubrication throughout. No oil contamination risk for gas purity-critical applications.
Find Your Compressor
Select your gas, application and required flow rate. Our selection logic will identify the right product category and model range for your specification.
Trusted Across Six Key Sectors
Oxygen compression requirements differ significantly between industries. Every application has distinct inlet conditions, required outlet pressure and duty-cycle demands. Explore the full application guide to see how our compressors are specified for your sector.
PSA oxygen generators typically output at 4–6 bar. Our oil-free booster compressors raise this to 150–165 bar for cylinder filling, ensuring compliant medical gas supply to hospitals and healthcare facilities.
Converter steelmaking, blast furnace oxygen enrichment and metal heat treatment demand reliable high-pressure oxygen at 30–35 bar and flow rates up to 100 m³/min. DW and 4MW series handle the largest industrial loads.
Oxy-fuel combustion in glass furnaces improves flame temperature, reduces fuel consumption by up to 30%, and cuts NOx emissions. Medium-pressure oxygen supply at 10–16 bar on a continuous-duty cycle.
Gas distributors and filling stations require consistent high-pressure output to fill oxygen, nitrogen and hydrogen cylinders efficiently and safely around the clock. Low maintenance overhead is critical for profitability.
High-density recirculating aquaculture systems (RAS) depend on a continuous, reliable oxygen supply. On-site PSA generation paired with our low-pressure boosters eliminates cylinder delivery dependency.
Oxidation reactors, partial oxidation units and waste gas treatment processes require stable medium- to high-pressure oxygen at custom flow rates. API 618 designs available for hazardous area installation.
Why Oil-Free Reciprocating Technology
Technical advantages that matter for oxygen applications — where lubricant contamination is not an inconvenience, it is a safety hazard. Explore the full technical background on our company and manufacturing page.
Cylinder bores are oil-free throughout the compression process. Only one grease application per year is required on external bearing points. Output oxygen meets ISO 8573-1 purity requirements for medical and industrial applications — no downstream oil coalescer required.
Average operating speed 260–350 RPM — significantly lower than oil-injected screw compressors running at 3,000+ RPM. Reduced mechanical wear extends mean time between overhauls to 25,000+ running hours on ZW, LW and DW series. Fewer unplanned shutdowns, lower lifetime maintenance cost.
Two-stage to five-stage configurations cover outlet pressures from 0.20 MPa (low-pressure supply) to 32 MPa (high-pressure cylinder filling), all within a single product platform. No need to source from multiple suppliers for different pressure requirements across your facility.
Every unit is fitted with inlet low-pressure shutdown, outlet over-pressure relief valve, inter-stage temperature alarm and automatic stop. Designed for 24-hour continuous unattended operation with PLC control and remote monitoring capability available on request.
Manufacturing Capability & Certifications
Backed by decades of industrial gas compressor manufacturing, operating a fully equipped production facility with in-house casting, machining and pressure testing. Every unit undergoes hydrostatic pressure test and performance verification before shipment.
System Certification
for Gas Industry Services
for Export Markets
Association Member
Oxygen Booster Compressors: A Specification Guide
What engineers and procurement managers need to know before specifying an oxygen booster compressor — from technology selection to pressure-stage configuration.
What Is an Oxygen Booster Compressor?
An oxygen booster compressor is a reciprocating machine that raises the pressure of an oxygen stream from a lower inlet pressure to a higher outlet pressure required by the downstream process or storage system. The gas source — typically a PSA oxygen generator, a VPSA unit, or a liquid oxygen vaporiser — has already done the initial pressure work. The booster takes that gas and raises it further.
The most common applications are oxygen cylinder filling stations (0.1–0.5 MPa inlet to 15.0–16.5 MPa cylinder pressure); steelmaking oxygen pipelines (3.0–3.5 MPa); and oxy-fuel combustion systems for glass furnaces (1.0–1.6 MPa).
Why the Compressor Must Be Oil-Free
Compressed oxygen reacts with hydrocarbon lubricants with extreme vigour. At elevated pressures and temperatures inside a compression cylinder, even small amounts of mineral oil can ignite spontaneously. Oil-free reciprocating compressors eliminate lubricant from the compression zone entirely — pistons run on PTFE-compound rider rings; cylinder walls need no lubrication. Output meets ISO 8573-1 Class 0 oil requirements without any downstream filter.
Pressure Stage Configuration
Each compression stage should not exceed a ratio of approximately 3.5–4:1. For oxygen (specific heat ratio gamma ≈ 1.4), this limits per-stage temperature rise to below 160°C in normal industrial service.
| Stages | Outlet Pressure | Typical Application |
|---|---|---|
| 2-stage | 0.20 – 0.80 MPa | PSA distribution, ASU output |
| 3-stage | 3.0 – 3.5 MPa | Steel mill pipeline, BOF converter |
| 4-stage | 10 – 15.0 MPa | Cylinder filling (large capacity) |
| 5-stage | 15.0 – 16.5 MPa | Cylinder filling (ZW compact series) |
Inter-stage water-cooled heat exchangers with moisture separators are fitted between every stage on all models above 18.5 kW. Condensate discharge is automatic.
How to Specify an Oxygen Booster Compressor
When enquiring, providing the following information allows us to return a complete technical recommendation:
- Gas type and purity (medical or industrial; trace contaminants)
- Inlet pressure — minimum and maximum (PSA output varies with regeneration cycle)
- Required outlet pressure — steady-state and peak
- Flow rate in Nm³/h or m³/min at inlet conditions (specify clearly)
- Duty cycle: continuous 24-hour, intermittent or seasonal
- Cooling medium: water temperature/pressure or air-cooled preference
- Power supply: voltage, frequency, available fault current
- Installation: indoor/outdoor, altitude, ambient temperature range
- Applicable standards: API 618, local pressure vessel code, area classification
PSA Integration — Key Consideration
A buffer receiver between PSA and booster is strongly recommended. Size the receiver for at least 10–15 minutes of compressor flow capacity. The booster inlet low-pressure cutoff protects the machine if PSA output falls below the minimum safe inlet pressure.
150 bar vs 165 bar & EPC Procurement
Cylinder Filling Pressure Selection
The most common fill pressure for T-type industrial cylinders in Europe and Asia is 150 bar (15.0 MPa) at 15°C. In some markets, 165 bar (16.5 MPa) is preferred to maximise gas content per cylinder. Our ZW series covers both: /150 and /165 suffix variants share the same frame — only stage ratios and final-stage design differ.
Large Industrial Projects and EPC Procurement
For air separation unit integration and steel mill oxygen supply, the compressor is specified against a process data sheet to API 618 Fifth Edition. We supply fully assembled skid-mounted packages — compressor, motor, inter-stage coolers, separators, instrumentation, control panel and interconnecting piping on a single baseplate — minimising site installation time. ATEX and explosion-proof configurations available.
Maintenance and Total Cost of Ownership
Lifetime cost is dominated by energy (60–80%) and maintenance (15–30%). Oil-free reciprocating designs have no oil changes, no oil filter elements, no separator cartridges. Primary consumables are piston rings (15,000–25,000 hr interval) and valve plates (8,000–12,000 hr). Explore the full product catalogue or contact us for a comparative analysis.
Common Questions
An oxygen booster compressor is specifically designed for pure oxygen service. The critical differences are: (1) oil-free compression throughout — lubricating oil and oxygen are incompatible at pressure due to combustion risk; (2) material selection compatible with oxygen service (avoiding aluminium alloys, certain plastics and copper alloys at high concentrations); (3) internal surface cleanliness standards — all wetted surfaces are degreased and cleaned to oxygen service standards before assembly; and (4) conservative design margins for pressure and temperature. A standard air compressor cannot be safely repurposed for oxygen service.
Yes. Our ZW, LW and DW series accept inlet pressures from atmospheric (approximately 0.1 MPa absolute) upward. PSA oxygen generators typically output at 0.3–0.6 MPa. We recommend installing a buffer receiver between the PSA and the booster to smooth out pressure fluctuations during the PSA regeneration cycle. The booster inlet low-pressure shutdown ensures the machine stops safely if PSA output falls below the minimum acceptable inlet pressure.
Our compressors are designed and manufactured to API 618 (Reciprocating Compressors for Petroleum, Chemical and Gas Industry Services). ISO 9001 quality management certification is held for our manufacturing facility. CE marking is available for European markets. Pressure vessel components are manufactured and tested to relevant national pressure vessel standards. For projects requiring specific regional certifications, please discuss your requirements with our engineering team before order placement.
Routine maintenance on our ZW, LW and DW series is minimal by design. External bearing lubrication requires one grease application per year. Valve plates and piston rings are the primary wearing components; inspection intervals depend on operating hours and gas conditions but typically fall in the range of 8,000–12,000 operating hours for valve inspection and 15,000–25,000 hours for piston ring replacement. There are no oil changes, no oil filter elements, and no oil separator cartridges — eliminating the highest-frequency maintenance items found on oil-injected compressors.
Yes. For large industrial and EPC projects, we supply fully assembled skid-mounted packages including the compressor, drive motor, inter-stage coolers and moisture separators, process and utility piping, instrumentation and safety devices, and a PLC-based control panel with local HMI. The package is factory-assembled, pressure-tested and performance-tested before shipment, minimising site installation time. ATEX and explosion-proof configurations are available for hazardous area classification. Contact us with your project data sheet for a technical and commercial proposal.
Get in Touch
Our engineers are ready to discuss your oxygen compression requirements — inlet conditions, outlet pressure, flow rate, gas purity, standards compliance and any special installation constraints.
For specifications, model selection, inlet/outlet pressure matching and custom engineering requests. Share your process data sheet and we will respond with a technical recommendation.
[email protected]Tell us your required outlet pressure, flow rate, inlet conditions and gas type. We will prepare a detailed technical and commercial proposal tailored to your project. All enquiries are treated as strictly confidential.
Open Enquiry Form →We manufacture to API 618 and related national standards. All compressors are available with custom inlet pressure, outlet pressure and flow rate configurations. Custom skid-mounted packages available for EPC projects.
