On-Site Oxygen for HVAC, Plumbing, Jewelry, and Production Brazing
Oxygen Generator for Brazing
On-site oxygen for the torches that braze. Feed every station a hotter, steadier oxy-fuel flame for copper, brass, and steel joints, retire the oxygen cylinders and their swaps, and make oxygen at 93%, 95%, or 99% purity from compressed air.
Oxygen purity tiers (95% and 99% ±1%)
Continuous purity verification
Typical payback vs delivered oxygen
Generator service life
Why On-Site Oxygen for Brazing
Oxygen is what brings the joint to brazing heat
Brazing needs a flame hot enough to flow the filler. Brazing joins metals with a filler alloy that melts and flows into the joint above roughly 840 degrees Fahrenheit, without melting the base metal. Getting the joint there quickly and evenly takes a hot, concentrated flame, and a fuel-air flame often is not enough. Adding pure oxygen to the fuel strips out the inert nitrogen a fuel-air flame has to heat, so the flame runs far hotter. An on-site oxygen generator for brazing feeds that oxygen to every torch in the shop, so each joint reaches filler-flow temperature fast and repeatably.
Cylinders and swaps are what slow a busy shop. A shop that brazes all day on delivered oxygen is managing cylinder rental, deliveries, and the interruption of swapping a bottle mid-run, plus the flame drifting as one drains. The heavier the work and the more stations, the more that supply chain costs in both money and stopped time. That is exactly where making the oxygen on-site changes the math.
On-site PSA is the same oxygen line, sized for the shop. A PSA oxygen generator makes oxygen on-site from compressed air and supplies every brazing station at once, at 93%, 95%, or 99% purity. It is the same standard oxygen equipment Gas Generation Solutions supplies for glass studios, ozone, wastewater, and aquaculture, matched here to the summed oxygen demand of the torches on the floor.
On-site oxygen, full lineup
PSA oxygen generators from compact skid sizes through several thousand SCFH. The standard 93% to 95% line and the 99% high-purity line cover brazing shops, glass studios, ozone feed, and industrial oxygen.
All oxygen generators →How PSA produces oxygen from air
Pressure swing adsorption uses a zeolite molecular sieve that selectively adsorbs nitrogen, leaving an oxygen-enriched stream. The same technology that delivers nitrogen at 99.9995% delivers oxygen at 93%, 95%, or 99% from ambient air, with no consumables in the gas path.
Learn more about PSA →Brazing applications
From a single bench to a production braze line
One PSA oxygen system can feed every brazing torch in the shop, from a single HVAC bench to a room of production stations. What changes across these applications is how much oxygen the flames draw, and the generator is sized to the summed peak.
HVAC and refrigeration
HVAC/R line brazing
HVAC and refrigeration shops braze copper refrigerant lines and fittings all day, often flowing nitrogen through the tube while the joint is brazed. An oxy-fuel flame from on-site oxygen brings each joint to brazing heat fast, and one generator supplies a whole shop of benches without a rack of cylinders.
Plumbing and copper
Plumbing and copper tube
Plumbing and mechanical shops braze copper and brass water and gas lines where a sound, leak-free joint is the whole job. A steady oxygen supply keeps the flame consistent across long runs of fittings, so the joints look and perform the same from the first to the last.
Jewelry and precious metal
Jewelry and precious metals
Jewelers braze and solder gold, silver, and other precious metals on small, precise oxy-fuel torches where flame control matters on delicate work. On-site oxygen gives a bench, or a studio of them, a clean, repeatable flame without storing and swapping small oxygen cylinders.
Production and manufacturing
Production braze stations
A manufacturer brazing assemblies at multiple stations for hours a day turns oxygen into a real line item. On-site generation replaces standing delivery contracts with one system sized to run every station at once, so output is limited by the operators, not by the oxygen supply.
Automotive and repair
Automotive and radiator repair
Radiator, HVAC, and metal repair shops braze copper, brass, and steel components where a hot, controllable flame speeds the work. On-site oxygen keeps the torch supplied through a full day of jobs without a driver visit or a bottle to change out mid-repair.
Maintenance and fabrication
Maintenance and fab shops
Maintenance and fabrication shops braze and heat a mix of metals as the work comes in, so the torch has to be ready whenever it is needed. An on-site generator makes oxygen on demand and pipes it to the bench, so brazing is never held up waiting on a delivery.
How It Works
From compressed air to a flame at every bench
Scope. This page covers the oxygen side of the flame. The generator supplies oxygen to the brazing torches; the fuel gas, acetylene, propane, or natural gas, and the torches themselves are the shop's. We size the oxygen system to the summed peak demand of the stations that run at once. This system is for brazing and heating flames, not for oxy-fuel cutting, which needs higher-purity oxygen than PSA delivers.
Step 01
PSA generator makes oxygen from compressed air
The on-site generator pulls in compressed air and passes it through a zeolite molecular sieve that adsorbs nitrogen, leaving an oxygen stream at 93%, 95%, or 99% purity. Oxygen collects in a buffer tank, and a built-in oxygen analyzer reads the tank purity continuously so the shop always knows what it is delivering. No deliveries, no oxygen cylinders to swap, no contract minimum.
Step 02
Oxygen is piped to each station
From the buffer tank, oxygen runs through the shop to a regulator at each brazing bench. One system replaces the cylinder sitting next to every station, so a single bench, a production line, or a repair shop all draw from the same steady source at the same set pressure.
Step 03
Oxygen mixes with fuel at the torch
At the torch, oxygen and fuel meet and burn. Because the oxidizer is nearly pure oxygen instead of air, the flame carries no inert nitrogen to heat, so it runs hotter and more concentrated and brings the joint to filler-flow temperature quickly. The operator sets the flame at the torch valves; the generator holds oxygen pressure steady while they work.
Step 04
The buffer tank holds flame under peak demand
Oxygen demand peaks when the most stations braze at once. The generator and buffer tank are sized to that peak, so pressure stays put when a production floor runs flat out. Size to the busy hour, not the average, and no torch starves when the shop is full.
Purity and Technology
Three purity tiers, and for a flame the tier matters
Oxygen comes off the PSA line at three working grades: 93%, 95%, and 99%. For a brazing flame the difference shows, because a higher-purity stream carries less inert nitrogen into the flame, so it runs hotter and reaches brazing heat faster. Most brazing is well served by 93% to 95%, while the 99% high-purity line is there for heavy-mass joints and steady production where flame temperature sets the pace.
Three working purity tiers
General bench brazing
A strong oxy-fuel flame for HVAC lines, plumbing joints, jewelry, and everyday bench brazing, at the lowest compressed-air consumption per SCF of oxygen. The right tier when the work is light-to-medium mass and operating cost matters.
Standard ceiling, hotter flame
The top of the standard line, and the same grade used for glass, ozone, and aquaculture. A hotter, more concentrated flame than 93% for shops that braze heavier fittings or want to bring joints to heat faster.
High-purity line, maximum flame heat
The high-purity line for the hottest flame. Worth the extra air and compressor for heavy-mass joints, large-diameter tube, and steady production where the flame temperature sets the pace of the day.
Why PSA from air, and not delivered oxygen cylinders
PSA supplies the whole shop from one system
A single PSA generator makes oxygen on-site from ambient air using a zeolite molecular sieve that adsorbs nitrogen. It supplies every station at set pressure at once, so it replaces the standing cylinder order a busy shop outgrows. The system runs on compressed air and a power connection, with no consumable in the gas path.
Air consumption rises with purity
Producing 95% oxygen from ambient air takes roughly 14 SCFM of compressed air per SCFM of oxygen, and reaching 99% pushes that toward 19, with a larger compressor and sieve bed to match. For brazing that tradeoff can be worth it, because the hotter flame works faster. We size the air side to the purity tier the work actually needs.
Sizing and ROI
Count the torches, size to the busy hour
A brazing oxygen system is sized off how much oxygen the shop draws when the most stations run at once. Every torch has a maximum oxygen consumption on its data sheet, and the generator is matched to the summed peak so the flame holds when the whole floor is brazing, not just when one bench is lit.
Sizing inputs
Input 01
Stations and how many run at once
The number of brazing benches and torches in the shop, and realistically how many are at full flame at the same time. A repair shop may run one or two; a production floor may keep a steady set going all day. Peak simultaneity, not the station count, drives the size.
Input 02
Per-torch oxygen draw at max
Each torch and tip lists a maximum oxygen consumption. A small jewelry or HVAC torch draws a fraction of what a large heating tip pulls on heavy-mass work. Summing the maximum draw of the torches that run together sets the oxygen the generator has to deliver.
Input 03
Purity tier and air side
Whether the work needs 93%, 95%, or the 99% high-purity flame sets how much compressed air the generator consumes per SCF of oxygen, and therefore the compressor. Choosing the tier the joints actually call for keeps the air side, and the running cost, no larger than it needs to be.
Payback drivers
Driver 01
Ends cylinder rental and deliveries
Delivered oxygen carries cylinder rental, delivery fees, and contract minimums on top of the gas. An on-site generator runs on compressed air, has no consumable in the gas path, and stays in service for 20 years or more, cutting oxygen cost by up to 90% versus delivered gas.
Driver 02
A steady flame means steadier joints
Oxygen at set pressure keeps the flame consistent from the first joint to the last, instead of drifting as a cylinder empties or stopping to swap a bottle mid-run. A repeatable flame means consistent, sound joints and no lost time changing tanks during a job.
Driver 03
Room to grow without a bigger contract
Sized with headroom, one generator lets a shop add benches or run longer hours without renegotiating an oxygen supply. Capacity the shop already owns turns growth into a decision about people and space, not about the gas bill.
Worked example
Production braze shop. A shop running several brazing stations at once takes the maximum oxygen draw listed for each torch, adds them for the stations that run together, and matches the generator and buffer tank to that combined peak at the chosen purity tier.
Smaller and larger. A single HVAC or jewelry bench sizes to a compact skid, while a production floor with many stations at flame steps up to a larger system with the compressor matched to its air demand.
Each build is matched to the busy hour so every station holds flame when the shop is full.
Not sure of your oxygen demand?
Give us a call and we can go over your torches, how many run at once, and the work you braze, to help set a baseline before we size the system.
Frequently Asked Questions
Oxygen for brazing
Why do brazing shops need oxygen instead of just air?
Brazing joins metals with a filler alloy that melts and flows into the joint above roughly 840 degrees Fahrenheit, and a fuel-air flame is often not hot enough to bring the joint there quickly. Adding pure oxygen removes the inert nitrogen a fuel-air flame has to heat along with the fuel, so the flame runs far hotter and more concentrated. That oxy-fuel flame is what reaches brazing heat fast and evenly across the joint.
What oxygen purity do I need for brazing? Is 99% better?
It depends on the work. Oxygen comes off the PSA line at 93%, 95%, or 99%, and a higher-purity stream carries less nitrogen into the flame, so it runs hotter and reaches brazing heat faster. Most HVAC, plumbing, and jewelry brazing is well served by 93% to 95%. The 99% high-purity line is worth the extra air and compressor for heavy-mass joints, large-diameter tube, and steady production where flame temperature sets the pace.
Can I use this oxygen for oxy-fuel cutting too?
No. Oxy-fuel cutting depends on a high-purity oxygen stream, typically above 99.5%, because the cut is made by the oxygen jet burning the steel, and cut speed and edge quality fall off quickly as purity drops. PSA oxygen tops out at 95% on the standard line and 99% on the high-purity line, which is right for brazing and heating flames but below what quality flame cutting needs. This system is for brazing, not cutting.
Can an oxygen generator replace my oxygen cylinders?
Yes. A PSA oxygen generator makes oxygen on-site from compressed air and pipes it to every brazing station at set pressure, so it replaces the standing cylinder order and the swaps that go with it. One system supplies a single bench or a production floor, holds a steady flame, and removes the deliveries, rental, and contract minimums that come with bottled oxygen.
How much oxygen does a brazing shop need?
Size off the busy hour. Every torch and tip lists a maximum oxygen consumption on its data sheet, so add the maximum draw of the torches that run at the same time to get the peak the generator must supply. A single HVAC or jewelry bench sizes to a compact skid, while a production floor with many stations at flame steps up to a larger system. Sizing to peak simultaneity keeps every station at flame when the shop is full.
How does on-site oxygen compare to delivered oxygen cylinders?
Delivered oxygen carries cylinder rental, delivery fees, and contract minimums on top of the gas, plus the interruption of swapping a bottle mid-run and the flame drifting as one drains. An on-site generator produces oxygen from compressed air with no delivery schedule and no consumable in the gas path, cutting oxygen cost by up to 90% versus delivered gas with a typical payback of 12 to 14 months and a service life of 20 years or more.
What does my shop need to run an oxygen generator?
Compressed air and power. The generator makes oxygen from compressed air, so the shop needs an air compressor sized to the oxygen demand and a reliable power supply. The air compressor is sized job by job and may be a packaged part of the system or matched to existing shop air. Once those are in place, the system produces oxygen on demand and pipes it to every station, with no deliveries to coordinate.
Can one generator feed multiple brazing stations?
Yes, and that is where on-site generation earns its keep. Oxygen from the buffer tank is piped to a regulator at each bench, so one system feeds a production line at set pressure. Sized to the peak of every station running at once, the generator holds flame across the floor when the shop is busy, with headroom to add stations later.
Send these numbers and we will size the system
The number of stations and how many run at once, the maximum oxygen draw listed for each torch and tip, the metals and joint sizes you braze, the purity tier you want, and your current oxygen source. With those, we can recommend the on-site oxygen generator size and the compressor to hold flame across the shop on your busiest hour.
Request a quote →Gas Generation Solutions supplies the same standard PSA oxygen line that serves glass, ozone, wastewater, and aquaculture customers, sized here for brazing shops from a single bench to a full production floor. The sizing is repeatable and the equipment is USA-built, UL Listed, and CE marked.