Fuel Gas And Flame Characteristics; Flame And Heat Placement Btu Output Per Cubic Ft Of Fuel Burned; Cylinder Valve Identification For Regulator Selection - Smith Little Torch Owner's Manual

11-2. Fuel Gas And Flame Characteristics

Settings: Neutral Flame
Acetylene − Oxygen
After igniting, open acety-
lene valve until soot disap-
pears from end of flame.
Add oxygen until the feather
shown on the right just dis-
appears in the bright inner
cone.
Propane − Oxygen
After igniting, add oxygen
until bright inner core reach-
es its shortest point and
then stop. Repeat process
to force as much fuel
through the tip as possible.
11-3. Flame And Heat Placement BTU Output Per Cubic Ft Of
Fuel Burned With Oxygen
Fuel Gas
Acetylene
500 970
Propane
250 2250
Natural Gas (City Gas)
11 900
Hydrogen
55 270

11-4. Cylinder Valve Identification For Regulator Selection

.
Compressed Gas Association connection numbers are also shown.
510
Internal
PROPANE
Total BTU
Output
3
ft Gas/hr
Compressed
(L Gas/hr)
1470
(41,626)
2500
(70,792)
911
(25,797)
325
(9203)
510
Internal
Threads
LARGE
INDUSTRIAL
FROM
60–400 Cu. Ft.
Flame Settings
Neutral Flame
Even Mixture of Fuel and Oxygen
Carburizing (Reducing) Flame
Excess Fuel Gas
S
Lower Temperature
S
Less Oxidizing
Oxidizing Flame (Seldom Used)
Excess Oxygen
S
Short Outer Flame
S
Narrow Inner Cone
S
Noisy
S
Hottest
Flame Temperatures
In °F (°C)
Atmospheric
Air Tips Air Tips
4800 1500
(2649) (816)
3500 1500
(1927) (816)
3400
−−
(1871)
4000
−−
(2204)
520
"B"
40 Cu. Ft.
ACETYLENE
Oxygen
6000
(3316)
4800
(2649)
4600
(2538)
4800
(2649)
200
ALL
"C"
SIZES
10
Cu. Ft.
OXYGEN
OM-263 357 Page 21
Oxygen
To Fuel
Ratio
25:1
5:1
2:1
5:1
540