Figure 8-6.--Mixing head for a low-pressure torch..
Figure 8-7.--Equal-pressure welding torch.
Welding tips and mixers made by different
numbers, and each manufacturer has its own
arrangement for classifying them. Tips have different
manufacturers differ in design. Some makes of torches
hole diameters.
are provided with an individual mixing head or mixer
for each size of tip. Other makes have only one mixer
No matter what type or size tip you select, the tip
for several tip sizes. Tips come in various types. Some
must be kept clean. Quite often the orifice becomes
are one-piece, hard copper tips. Others are two-piece
clogged with slag. When this happens, the flame will
tips that include an extension tube to make connection
not bum properly. Inspect the tip before you use it. If
between the tip and the mixing head. When used with
the passage is obstructed, you can clear it with wire tip
an extension tube, removable tips are made of hard
cleaners of the proper diameter or with soft copper
copper, brass, or bronze. Tip sizes are designated by
wire. Tips should not be cleaned with machinists'
8-5