GTT Delta Mag Glass Torch

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. GTT’s Flow Rate Chart, measured on propane at the largest usable flame, lists it at 20 psi fuel and 80 psi oxygen; GTT notes natural gas burns roughly 2.5 times the propane volume, and GTT torches on natural gas covers house lines. 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.

What GTT sells

GTT sells the Delta Mag with a Phantom or a Mirage middle fire, both at $4,250 on its model page, and with its compressed-air option; our catalog’s 88-jet entry is the Phantom-middle version. The version picker at the top of the Specs section lists each one with GTT’s own name, its price as GTT’s pages showed it on 2026-10-06, and what GTT’s listing says about it; prices change, so confirm with GTT.

GTT’s instruction sheet describes nine valves (red fuel, green main oxygen and blue secondary oxygen for each of the three fires) and sets fuel at 20 psi and oxygen at 80 psi, matching the Flow Rate Chart. The torch sits on 6 studs with rack-and-pinion adjustment on a powder-coated base. It ships with 2 feet of 3/16 inch hose and screened adapters for 1/4 inch ID grade T hose, with 2 feet of 1/4 inch grade T hose on the outer studs, plus the base, instructions and a cleaning kit, and a DVD on GTT’s store listing. Custom color adds $200. For the air option, GTT specifies clean, dry air regulated to 60 psi or lower. GTT gives no delivery date and notes that material availability can delay torches.

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. On the torch itself, GTT’s servicing page states a one-year warranty against factory defects that does not cover damage from improper use, misuse, or neglected maintenance; if you’re buying used, work through the used GTT torch checklist.

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.