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

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 88–90 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. GTT doesn’t publish the Delta Mag’s exact LPM, so size your oxygen around the work you actually do 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 arrestors on both lines, didymium eyewear, 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. GTT doesn’t publish the Delta Mag’s exact oxygen flow (LPM) or current pricing, so confirm those specifics with GTT before purchasing.