0
฿0.00
An empty cart
You have no item in your shopping cart
Metalworking & Fabrication › Gas Generators
Category 03 of 4Gas Generators
Laser cutters, weld cells, and heat treatment lines all run on gas, and a late delivery or an empty cylinder stops them just as surely as a broken machine. A nitrogen gas generator for metalworking and an oxygen gas generator for fabrication industry plants turn ordinary compressed air into process gas at the point of use. Domnick Thailand supplies industrial nitrogen generator systems and industrial oxygen generator systems built around PSA technology, so your shop makes the gas it needs, when it needs it.
ISO 8573-1 Air Quality Aware PED 2014/68/EU Vessel Aware NFPA 55 Gas Safety Aware
Purity Ladder: Typical Targets
N₂ for stainless and aluminium laser cutting99.99%+
N₂ for general inerting and purging99.5%+
O₂ for mild steel laser cutting99.5%+
O₂ from a PSA generatorup to ~93%
Typical ranges for orientation only. Always confirm the exact purity, pressure, and flow with your machine and material specifications.
Up to 99.999%Nitrogen PurityAchievable from PSA with the right sizing
~93%PSA Oxygen CeilingArgon in air sets the practical limit
24/7Gas On DemandNo changeovers, no reordering
0Delivery TrucksAir in, process gas out
Two Gases, One Air Source
Air is about 78% nitrogen and 21% oxygen. A PSA generator separates one from the other right beside your machines, which is why a single compressed air line can feed both a laser cutter and a weld cell.
N₂
Nitrogen For Clean, Oxide-Free Work
A nitrogen gas generator for metalworking supplies inert gas that keeps oxygen away from hot metal. That is what gives stainless steel and aluminium a bright, burr-free cut edge that can go straight to welding or powder coating.
On-site nitrogen generation for laser cutting removes the weight of cylinder packs and the risk of running dry mid-job, and a PSA nitrogen generator for manufacturing plants runs from the compressed air you already own.
- On-site nitrogen generation for laser cutting
- PSA nitrogen generator for manufacturing
- Industrial nitrogen generator system
- Nitrogen supply for steel fabrication
VS
O₂
Oxygen For Burning And Heating
An oxygen gas generator for fabrication industry use feeds processes that need oxygen to make heat: mild steel cutting, flame heating, brazing, and furnace enrichment. Where moderate purity is enough, making it on site is simpler than managing deliveries.
On-site oxygen generation for metal processing and a PSA oxygen generator for metal fabrication lines give a steady flow that is sized to the burner or torch, not to the size of a cylinder.
- On-site oxygen generation for metal processing
- PSA oxygen generator for metal fabrication
- Industrial oxygen generator system
- Oxygen supply for welding applications
Which Gas For Which Job
Laser cutting is the biggest gas user on most fabrication floors. The assist gas you choose decides the edge quality, the speed, and the cost per part.
N₂Assist gas
Stainless Steel And Aluminium Cutting
Nitrogen blows molten metal out of the kerf without reacting with it. The result is a bright, oxide-free edge that needs no grinding before welding or coating. This is the main reason shops invest in on-site nitrogen generation for laser cutting.
What To Plan For
High purity, typically 99.99% or better, and high delivery pressure. Consumption depends on nozzle size and pressure, so size the generator to the cutting heads running together, not to one machine.
O₂Assist gas
Mild Steel Cutting
Oxygen reacts with carbon steel and adds heat to the cut, which lets the beam move through thicker plate more easily. The edge carries a thin oxide layer, which suits parts that will be painted or machined.
What To Plan For
Cutting quality is sensitive to oxygen purity, and PSA output tops out near 93%. Check the purity your cutter specifies before choosing on-site oxygen generation for metal processing.
N₂Purge gas
Weld Purging And Backing
Inert gas inside a stainless pipe or vessel prevents the dark, brittle oxidation that forms on the root side of a weld. A steady nitrogen supply for steel fabrication shops makes long purges practical instead of costly.
What To Plan For
Follow the weld procedure for the alloy. Duplex and some other grades have their own gas rules, so confirm that nitrogen is permitted before using it as a backing gas.
O₂Heat support
Brazing, Heating, And Furnace Enrichment
Oxygen-enriched flames burn hotter and faster, which shortens heating cycles and saves fuel. A dependable oxygen supply for welding applications and related heating work keeps torches and burners steady across the shift.
What To Plan For
Flow rate matters more than ultra-high purity here. Size the generator to peak torch and burner demand, and add a buffer vessel for short bursts.
Three Ways To Buy Your Gas
Every shop pays for gas one of three ways. Here is how they differ for a plant that cuts, welds, and heats every day.
Cylinders And Packs
Simple to start, and fine for low or occasional use. As volume grows, handling and changeovers become a daily chore.
- ProsNo setup, any purity grade
- ConsManual changes, storage space, rental, stock-outs
- Best ForSmall or irregular demand
On-Site Generation
PSA Gas Generator
Compressed air goes in and nitrogen or oxygen comes out. A nitrogen supply for steel fabrication lines and an oxygen feed for heating are both made where they are used.
- ProsGas on demand, no deliveries, steady cost per cubic metre
- ConsNeeds compressed air capacity and an upfront investment
- Best ForDaily, high-volume use
Bulk Liquid Tank
Efficient at very large volumes with a reliable delivery route. Gas is lost to boil-off when demand is low.
- ProsHigh purity, large capacity
- ConsDelivery schedule, tank rental, boil-off, site footprint
- Best ForVery large, constant demand
How PSA Makes Gas From Air
Pressure Swing Adsorption uses two vessels that take turns. While one separates the gas, the other resets, so the output never stops.
Clean Compressed Air In
Feed air is the generator's raw material. Oil, water, and dust are limited by ISO 8573-1 classes set by the generator maker.
Filter And Dry
Coalescing filters and a dryer protect the adsorbent bed. Moisture and oil are the two things that shorten its life.
Twin Adsorption Towers
For nitrogen, a carbon molecular sieve holds back oxygen. For oxygen, a zeolite bed holds back nitrogen. Towers swap roles every minute or so.
Buffer Vessel
A receiver smooths the output and covers short peaks, so the cutting head or torch sees a steady pressure.
Point Of Use
Gas goes by pipe to the laser, weld cell, or burner. A purity analyser can confirm quality at the outlet.
Purity And Flow Trade Off
A PSA nitrogen generator for manufacturing lines delivers higher purity at lower flow. To get very high purity at a high flow, size the generator up, not down.
Oxygen Has A Natural Limit
Argon behaves like oxygen in a zeolite bed, so a PSA oxygen generator for metal fabrication use tops out near 93%. For very high purity cutting oxygen, confirm requirements first.
Sizing It Right, Running It Safely
Share these six answers and our engineers can propose an industrial nitrogen generator system or industrial oxygen generator system that fits your floor. Chat on LINE to start.
Six-Question Sizing Sheet
1
Which Gas And What Purity?
Nitrogen or oxygen, and the purity your cutting or welding procedure actually requires.
2
What Peak Flow?
Add up all machines that run together, in cubic metres per hour, then include a margin for future machines.
3
What Delivery Pressure?
Laser nitrogen is used at much higher pressure than purge gas. A booster may be needed after the generator.
4
Is The Compressor Big Enough?
The generator draws a share of your compressed air. Check spare capacity and air quality before you commit.
5
How Peaky Is Demand?
Short bursts call for a larger buffer vessel rather than a larger generator.
6
Where Will It Sit?
Allow ventilation, floor space, and pipe routing to the point of use.
Gas Safety On The Shop Floor
Making gas on site changes where it can build up. A few simple habits keep both gases under control.
Nitrogen: Oxygen Deficiency
Nitrogen displaces air without any smell or warning. Ventilate the generator room and consider an oxygen monitor where nitrogen could collect, since air below about 19.5% oxygen is considered deficient.
Oxygen: Enrichment And Fire
Air above about 23.5% oxygen is considered enriched, and materials burn far more readily in it. Keep oil, grease, and sparks away from oxygen equipment and use oxygen-clean fittings.
Pressure Equipment
Receivers and buffer vessels are pressure vessels. Keep relief devices and inspection records current.
Standards & Compliance
ISO 8573-1 Compressed Air Purity Classes PED 2014/68/EU Pressure Equipment NFPA 55 Compressed Gases Code OSHA Oxygen Level Limits Aware ISO 9001 Quality
Stop Ordering Gas, Start Making It
Tell our engineers what you cut, weld, or heat. We will size a nitrogen gas generator for metalworking or an oxygen gas generator for fabrication industry use that matches your purity, flow, and pressure.
Get expert guidance when you need it. Our support team is here to provide you with the right solutions.
