Figure 5-3.-Mixing head for the low-pressure torch.

Figure 5-4.-Equal-pressure welding torch.

A typical equal-pressure welding torch, also called a general-purpose torch, is shown in figure 5-4. The medium-pressure torch is easier to adjust than the low-pressure torch and, since equal gas pressures are used, you are less likely to get a flashback. (Flashbacks are covered in chapter 4.)

Welding TIPS and MIXERS are designed in several ways, depending on the manufacturer. Some torch designs have a separate mixing head or mixer for each tip size. Other designs have only one mixer for several tip sizes. Tips come in various types; some are one-piece hard-copper tips and others are two-piece tips that