What's the difference between the Phantom-middle and Mirage-middle Delta Mag?

GTT builds the Delta Mag with either a Phantom (15-jet) or a Mirage (33-jet) middle stage, which changes the total jet count (about 88 vs 90), but the maximum flame size is the same either way. The choice is about how the stages fill in, not peak output.

Is the Delta Mag a good first torch?

No, it's an advanced, production-class burner. Beginners should start with a single-stage GTT like the Bobcat or Cheetah and a much smaller oxygen supply.

Boro. The Delta Mag is a thick-boro and cane production torch; soft-glass beadwork is far better matched to GTT's smaller torches.

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GTT Delta Mag: the three-stage, ~88-jet Triple Mix production torch for thick boro

Name: Glass Torch Technologies Delta Mag
Brand: Glass Torch Technologies
Price: 4250 USD

GTT Delta Mag · Bench torch · Surface mix

The GTT Delta Mag is a three-stage Triple Mix (surface-mix) production torch, a 7-jet Lynx center, a Phantom or Mirage middle, and a large outer fire (about 88 to 90 jets), built as a deep heat base for thick borosilicate and cane work.

Specs

Mix type: Surface mix
Mount: Bench
Oxygen (estimate): ~54 LPM
Fuel: Propane, Natural gas
Skill level: Advanced
Glass: Boro
Best for: Large boro, Production, Thick work
Price: ~$4,250 (reference)
Jets: 88
Stages: 3

Treat the oxygen figure as a rough sizing estimate, not a specification. Depending on the model it may be manufacturer full-flame consumption, a converted flow figure, or a documented estimate, and delivered pressure and purity matter as much as flow. What actually drives a torch choice is the glass, the work, and the flame, so size your oxygen supply after you pick the torch. Prices may be manufacturer list prices or observed dealer references. Use the evidence label and sources below, then confirm the exact configuration before buying.

Overview

The GTT Delta Mag is one of Glass Torch Technologies’ production-class burners, a three-stage Triple Mix torch built to put a large, penetrating heat base under thick borosilicate and cane work. It stacks a 7-jet Lynx center, a configurable Phantom or Mirage middle, and a big outer fire, totaling around 88 to 90 jets depending on the middle stage. Importantly, GTT notes the maximum flame size is the same whether you spec the Phantom or Mirage middle, the difference is how the stages fill in, not peak heat.

What the three-stage Triple Mix flame gives you

Triple Mix is GTT’s surface-mix technology: fuel and oxygen meet at the face of the torch, keeping the mixing chamber cool and giving a clean, penetrating flame that drives heat into the core of heavy glass rather than just washing the surface, exactly what thick boro and cane work demand. The three stages let you keep a fine center flame for detail while having a large soaking flame available. For the underlying tech see GTT Triple Mix technology and surface mix vs premix torches; for why penetration matters here, read soaking vs penetrating flame.

Who the Delta Mag is for

The Delta Mag is squarely a tool for advanced makers and production studios doing thick boro, cane, and Marini-style work, anyone who needs a deep, repeatable heat base and a fine center flame in the same torch. It isn’t a soft-glass bead torch and it isn’t a beginner’s first burner.

Glass, fuel, and oxygen

The Delta Mag burns propane or natural gas with oxygen and is built for boro. As a three-stage production torch, its oxygen demand is high, realistically tanked oxygen or multiple concentrators rather than a single small unit. Our catalog carries a ~54 LPM reference converted from GTT’s flow table for the largest usable flame; size your supply to the flame you actually run and confirm with GTT. Start with how many LPM does my torch need and plan your supply with oxygen concentrator vs tanks.

Where it sits in the GTT lineup

The Delta Mag sits among GTT’s production burners, above the two-stage Mirage and alongside the versatile Kobuki. It’s built on the same Lynx center and Phantom/Mirage stages as the rest of the line, so even at production scale the flame behavior is familiar, you’re running a bigger version of a flame you already know.

Before you buy

Budget for the whole system, not just the torch: an oxygen supply sized to a three-stage production torch, the correct propane or natural-gas regulator, flashback protection matched to your torch and gas supply, didymium or boro-rated eyewear matched to your glass, and serious ventilation. New to plumbing a torch this size? Start with the fittings, hoses & connectors guide and the glass torch safety setup guide.

Editor’s note: spec details reflect GTT’s own materials. The catalog’s ~54 LPM oxygen figure is converted from GTT’s flow table for the largest usable flame (a ceiling, not a minimum), and current configuration details should be confirmed with GTT before purchasing.

Fit and tradeoffs

Best for: Advanced makers and production studios working thick borosilicate, cane, and Marini-style pieces who need a large, penetrating heat base with a fine center flame still available.

Not for: Beginners, detail-only work, or anyone on a small single concentrator, this is a thirsty, production-class burner.

Pros

+ Three-stage Triple Mix: Lynx center, Phantom or Mirage middle, and a large outer fire (~88 to 90 jets)
+ Large heat base for thick boro and cane work
+ Penetrating surface-mix flame that drives heat into the core of heavy glass
+ Configurable middle stage (Phantom or Mirage) for the same max flame size
+ Fine Lynx center flame still available for detail

Cons

− High oxygen appetite, plan a tank or multi-concentrator supply
− Pro price band; a serious investment in the torch and the oxygen to feed it
− Built for boro production, not soft-glass beads or fine detail alone
− Some oxygen figures are converted from CFH and prices vary by configuration; confirm the exact setup with GTT

Flame notes

3-stage Triple Mix production torch: 7-jet Lynx center + a Phantom (15) or Mirage (33) middle + an outer fire (66 with Phantom mid, 50 with Mirage mid) = 88 jets (Phantom mid) or 90 jets (Mirage mid); max flame size is the same on both. Large heat base for thick boro and cane work.

Maker

Glass Torch Technologies

USA

Focus: Boro, Production, Pipe, Soft

Tioga, Pennsylvania maker of standard surface-mix, patented Triple Mix, and 4-Way Mix glassworking torches. GTT says it machines, builds, and tests its torches by hand.

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Compared with

Head-to-head guides that put the Delta Mag against other torches.

FAQ

What is the GTT Delta Mag built for?: Thick borosilicate, cane, and production work. It's a three-stage Triple Mix torch, a Lynx center, a Phantom or Mirage middle, and a large outer fire (about 88 to 90 jets), giving a deep heat base for heavy glass while keeping a fine center flame on tap.
What's the difference between the Phantom-middle and Mirage-middle Delta Mag?: GTT builds the Delta Mag with either a Phantom (15-jet) or a Mirage (33-jet) middle stage, which changes the total jet count (about 88 vs 90), but the maximum flame size is the same either way. The choice is about how the stages fill in, not peak output.
Can the Delta Mag run on an oxygen concentrator?: It's a three-stage production torch, so its oxygen demand is well beyond a single small concentrator. Our catalog carries a ~54 LPM reference converted from GTT's flow table at the largest usable flame, so plan around tanked oxygen or multiple concentrators and confirm with GTT.
Is the Delta Mag a good first torch?: No, it's an advanced, production-class burner. Beginners should start with a single-stage GTT like the Bobcat or Cheetah and a much smaller oxygen supply.
Soft glass or boro?: Boro. The Delta Mag is a thick-boro and cane production torch; soft-glass beadwork is far better matched to GTT's smaller torches.