Selecting And Installing A Tip; Lighting /Adjusting Torch When Using Acetylene Or Hydrogen Fuel - Smith Little Torch Owner's Manual

8-7. Selecting And Installing A Tip

1. Fully open the oxygen and fuel gas regulators (turn handles clock-
wise).
2. Select the desired tip. Tip sizes are represented by a number (2−7)
stamped on the copper section. Size 7 produces the largest flame.
.
It is recommended that the size 2 tip not be used for gas other than
acetylene or hydrogen.
3. Install tip and tighten with a wrench. (Do not overtighten.)
8-8. Lighting And Adjusting Torch When Using Acetylene Or
Hydrogen Fuel Gas
The following instructions are adjustment procedures for the torch when
using acetylene or hydrogen fuel gases. This equipment is designed to
operate at a set volume of gas for each tip.
Follow the set-up instructions explained in Sections 8-2 thru 8-7 before
lighting the torch.
Using less than the required volume of gas may result in over-
heating of the tip or equipment and can lead to an internal fire
or flashback.
When lighting torch, keep the tip pointed away from people and
combustibles.
.
When using hydrogen, the flame from the size 2 tip will be difficult
to see. Lighting and flame adjustment should be made in a dark area
or in front of a dark background. Use of a cobalt goggle lens may
increase flame visibility.
1. Adjust the regulator outlet pressure to the torch by turning the regu-
lator adjusting handle clockwise until the outlet pressure gauge in-
dicates the recommended pressures for the tip being used (see
Section 11-1).
2. Slightly open the torch fuel gas valve approximately 1/4 turn and ig-
nite the gas using an approved friction spark lighter or bunsen burn-
er.
Do not use matches or a cigarette lighter to ignite the gas.
3. Continue opening the fuel gas valve until the flame is about to leave
the end of the tip or the soot being discharged disappears.
4. Slowly open the torch oxygen valve. Continue to open torch valve
until the flame is in its neutral condition or the desired flame is
achieved.
OM-263 357 Page 16
Figure 3. Testing Equipment For Leaks
161-013