Section 7 − Using Torch With Disposable-Type Cylinders - Smith Little Torch Owner's Manual

concentrated, pinpoint high temperature flame (about 6000°F/3316°C)
whereas the other gases tend to spread the heat produced throughout
the outer flame. The acetylene flame produces soot during combustion
and the LP gases tend to burn much cleaner. Acetylene gas is lighter
than air and in the event of a gas leak it will tend to dissipate in the atmos-
phere with any air flow. LP gas is heavier than air and will collect in low
spots, thereby creating potential breathing and combustion hazards.
What are the flame sizes and orifice diameters of the tips?
Tip Orifice
Size Diameter
2 .006
3 .011
4 .020
5 .029
6 .037
7 .047
What are the applications for twin flame tips?
The flexible twin flame tips may be used where both sides of an object
can be heated. They can speed up the soldering or brazing process and
provide even heating for complete, more even solder flows. The size 3
twin tip is often used by jewelers for sizing rings. Tip tubes are flexible and
may be bent to position the flames as desired.
What are the applications for the multi−flame (rosebud) tips?
They may be used where a larger, more widely dispersed flame is need-
ed for brazing, soldering, or heating. They are used predominantly in the
jewelry industry for annealing, reticulation, and casting of gold and silver.
Both acetylene and the propane models are capable of casting up to 3 oz
(85 g) of gold or silver. These tips are also used for enameling and plas-
tics polishing.
Can the torch gas valves be replaced if they are damaged or
worn out?
Yes, the complete valve assembly may be replaced for either gas. Using
an open end wrench, remove the valve assembly from the torch body.
The white PTFE packing rings under the valves should also be replaced
(part no. 7348). Valve assembly part numbers are as follows: oxygen
(green) No. 7345; fuel (red) No.7346.
SECTION 7 − USING THE TORCH WITH
DISPOSABLE-TYPE CYLINDERS
Inspect equipment before use. Do not use if grease or oil is
present on equipment or if equipment is damaged. Have equip-
ment cleaned/repaired by a qualified person.
OM-263 357 Page 10
Orifice
BTUs/
Drill
Hr
Size
97 130
85 1,150
76 2,300
69 3,800
63 6,585
56 9,200
Recommended
Pressures
(Both Gases)
psig kPa
2 13.7
4 20.7
5 27.6
6 34.5
6 41.4
8 48.3
Overall
Flame
Length
in. mm
1/8 3
1-1/2 38
5-1/2 140
(thin)
5-1/2 140
6-1/2 165
7 178