Disposable Compressed Gas Cylinders; Installing Regulators On Cylinders − Models 239-499B And 239-500B; Installing Hoses - Smith Little Torch Owner's Manual

Do not slightly open or "crack" acetylene cylinder valve to
blow debris from the valve outlet. Remove the debris using ni-
trogen, air, or a clean, oil-free rag.

7-1. Disposable Compressed Gas Cylinders

Use only compressed gas cylinders that are approved by the Depart-
ment of Transportation (DOT) with this equipment. The torch will operate
on the throw-away disposable cylinders that are found in most hardware,
retail, or welding outlets.
Dispose of used disposable cylinders according to the manu-
facturer's recommendations. Do not throw cylinders in fire.
Do not completely empty disposable cylinders. When the
flame indicates a loss of pressure, immediately shut down the
system and replace the cylinder.
Never tamper with or attempt to repair disposable cylinders. If
damaged, return cylinder to the supplier. Always check the
regulator cylinder connection for leaks.
7-2. Installing Regulators On Cylinders − Models 239-499B
And 239-500B
1. Before attaching the regulators to the disposable cylinders, be sure
the regulator and torch valves are in the Off position.
2. Attach the oxygen regulator (identified by the word "Oxygen"
stamped on side of regulator) to the oxygen cylinder. The dispos-
able oxygen cylinder and the oxygen regulator both have left-hand
threads. Turn regulator by hand counterclockwise and tighten se-
curely.
3. Attach the fuel gas regulator to the disposable fuel gas cylinder. The
regulator and the cylinder both have right-hand threads. Turn regu-
lator by hand clockwise and tighten securely.
4. Check the regulator–cylinder connection for leaks.

7-3. Installing Hoses

Replace hoses at the first sign of any defects, flaws, or dam-
age. The hoses should otherwise be replaced every four years.
Inspect hoses for damage or leaks before each operation. Do
not allow hoses to come in contact with hot metal, molten sol-
der, or corrosive chemicals. Do not expose hoses to fluxing
agents as these agents will deteriorate the hose materials and
cause them to leak.
Do not splice or use damaged oxy-fuel hoses.
1. Use only the hoses that are supplied by Smith Equipment. These
hoses transport low-pressure gases from the regulator to the torch
tips. The hoses are color coded (green) for oxygen and (red) for fuel
gas.
2. Attach the green hose to the oxygen regulator (right-hand threads)
and tighten firmly with a wrench.
3. Attach the red hose to the fuel gas regulator (left-hand threads) and
tighten firmly with a wrench.
.
If the hoses are not color coded, attach the hose connection with machined
grooves on the nut to the fuel gas regulator (left-hand threads). Attach the hose
connection with no grooves on the nut to the oxygen regulator (right-hand
threads). Tighten both connections firmly with a wrench.
4. Close both the oxygen and fuel gas valves on torch body.
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