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Do not activate the system with the regulator pressure adjust-
ing handle turned in. This condition can allow high pressure
gas to damage the internal parts of the regulator which can re-
sult in a fire or explosion.
1.
Turn the oxygen regulator pressure adjusting handle counterclock-
wise until no spring pressure is felt on the pressure adjusting han-
dle.
2.
Turn the fuel-gas regulator pressure adjusting handle counter-
clockwise until no spring pressure is felt on the pressure adjusting
handle.
3.
With the oxygen cylinder between you and the regulator, slowly
open the cylinder valve until the maximum cylinder pressure is indi-
cated on the high-pressure regulator gauge. Then, open the oxy-
gen cylinder valve all the way.
4.
Open cylinder valve. When using acetylene as the fuel gas, open
cylinder valve no more than 3/4 turn. When using a fuel gas other
than acetylene, open the cylinder valve completely.
8-5. Adjusting Regulator Pressures And Purging The Hoses
1.
Verify the oxygen and fuel-gas valves on the torch body are in the
closed (off) position.
2.
Turn oxygen regulator pressure-adjusting handle clockwise until
the low pressure gauge indicates 5 psig (34 kPa).
Always purge gas from the system before lighting torch to pre-
vent a possible mixed-gas explosion. Purge gas in a well venti-
lated area and away from flame or sparks.
3.
With no tip installed, open the torch body oxygen valve and allow
oxygen to flow for three to four seconds. This will purge the oxygen
side of the system.
4.
Repeat steps 2 and 3 for the fuel gas. This will purge the fuel gas
side of the system.
8-6. Testing The Equipment For Leaks
Use an approved oil-free leak detection fluid to locate possible
leaks.
Do not stand in front of or behind the regulator when opening
the cylinder valve. Never open a cylinder valve suddenly as this
can damage a regulator or cause an oxygen regulator fire.
With the system pressurized and the torch body valves closed, check
every connection and joint from the cylinder valve to the torch tip with an
approved leak detection solution (Figure 3). If leaks are detected, elimi-
nate them before proceeding. If leaks cannot be eliminated, do not put
the equipment into service until it has been repaired or replaced.
.
If the torch is not going to be in use for more than one half hour, it
is recommended that the system be completely shut down (see
Section 8-11).
OM-263 357 Page 15
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