What are the two main types of cutting torches used in oxy-fuel systems?

What are the two main types of cutting torches used in oxy-fuel systems?

• A. Injector and positive pressure
• B. Injector and neutral
• C. Positive pressure and neutral
• D. Oxidizing and neutral

Answer: (A)

Oxy-fuel cutting torches come in two main designs: injector-type and positive-pressure (non-injector) torches. In an injector torch, the high-velocity oxygen jet creates suction that draws fuel gas into the mixing chamber, so the fuel-oxygen mix is formed inside the torch before it reaches the tip. In a positive-pressure torch, the fuel gas is fed under positive pressure directly to the mixing area, and the oxygen flow does not entrain the fuel gas. The terms oxidizing and neutral describe flame settings, not torch construction, so they’re about flame characteristics rather than the torch type.

Oxy-fuel cutting torches come in two main designs: injector-type and positive-pressure (non-injector) torches. In an injector torch, the high-velocity oxygen jet creates suction that draws fuel gas into the mixing chamber, so the fuel-oxygen mix is formed inside the torch before it reaches the tip. In a positive-pressure torch, the fuel gas is fed under positive pressure directly to the mixing area, and the oxygen flow does not entrain the fuel gas. The terms oxidizing and neutral describe flame settings, not torch construction, so they’re about flame characteristics rather than the torch type.