The regulator did not cause the center candle of her torch to be longer than the rest. The regulator did not cause the center candle to be yellower than the rest.
Pressure from the regulator is not the problem here.
The needle valves control the flow of gas and oxygen to the torch.
Think of it this way...
All of the larger two-staged torches Bethlehem makes have the Piranha as the centerfire, right? The Barracuda, the Tiger Shark, The PM2D and the Great White. They all have the same centerfire and it is the same as the Piranha. Well, all of those larger torches require higher pressures to supply them with oxygen, typically 10-20 psi. So, when you are working on one of these big torches and then decide to just use the centerfire for something, do you run over to your tanks and adjust your pressures? No, you just keep on working. Why? Because the needle valves control what gets to the torch jets. The centerfire of those big torches (even when set at 20 psi) will perform just as nicely as the stand-alone Piranha (even if set at 10 psi). The only difference is that the valves will be more sensitive at the higher pressure - meaning you won't have to turn the valve as far to get the same adjustment.
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