Definition
An oxyacetylene cutting or welding torch in which oxygen and acetylene are supplied to the torch head at equal pressures. The two gases are mixed inside the torch, and the flame characteristics are controlled by the pressures set at the regulators on the supply cylinders.
Plain English
A welding or cutting torch where the oxygen and the fuel gas are fed in at the same pressure and mixed inside the torch before burning at the tip.
Context Anchor
Seen in aircraft maintenance references dealing with gas welding, torch selection, and welding equipment setup.
Derivation
Called 'balanced pressure' because the two gases arrive at the torch at matched (balanced) pressures, rather than one gas drawing the other in by suction as happens in an injector-type torch.
Why Pilots Care
For aircraft maintenance work, using the correct torch type and pressure setup helps produce a stable flame and reduces the chance of poor weld quality or unsafe torch operation.
Intuition Check
Do not read “balanced” as meaning the torch has equal weight on both sides. Here, “balanced” means the two gas pressures are approximately matched.
Example Sentence 1
The mechanic adjusted both regulators to the same setting before lighting the balanced pressure torch.
Example Sentence 2
During the annual inspection the mechanic selected a balanced pressure torch to make clean repairs on the thin aluminum skin.