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• Propane is heavier than air and collects when it is all-
owed to escape in low-lying rooms. Ensure everything
is leaktight.
• Propane cylinders must only be used in an upright
position.
5. Starting up
5.1 Preparation
• Connect the handle with the hoses permitted for the gases
concerned to the safety equipment of the gas cylinder or
offtake point of the central gas supply pressure reducer.
• Only use hoses, safety equipment, hose connection
glands and cap nuts (or appropriate hose connections)
which meet the current applicable standard.
• Fasten hoses to the hose connection glands with suitable
hose clips.
• Check all hose connections and other connections
with a leakage finding spray for leaks.
• Select the attachment to be fitted into the handle. And
fix with the quick coupling. For cutting attachments
provide the attachment with a suitable nozzle.
For long hoses and in cutting work using cutting
attachments with gas-mixing nozzles, i.e. gas and
compressed air torches (II), using a backflow valve in
front of the handle is recommended.
• When fitting the attachment into the handle ensure
that the parts and seals are clean and undamaged. Do
the same when fitting the cutting nozzle.
• Close both valves (4 and 5) on the handle.
• Slowly open cylinder valves or offtake point valves and, if
present, open the shutoff valve on the pressure reducer.
• Set to the recommended operating pressure (see table)
with the adjusting screw on the pressure reducer.
5.2 Igniting and setting the standard torch
5.2.1 Injector-type torch (i)
A: Welding, brazing, heating up
• Open oxygen valve (4) on the handle and rinse out the
hose briefly with gas. Long hoses or small welding
attachments must be rinsed for longer. Check the pres-
sure on the pressure reducer and correct as need (flow
pressure).
• Open the fuel gas valve (5) on the handle slightly and let
the fuel gas flow out for a short time. Check the pressure
on the pressure reducer and correct as needed (flow
pressure).
• Ignite the outflowing gas mixture.
• Set the required flame size and type with the valves
(4 and 5) on the handle. The torch is now ready for use.
B: Flame cutting
• Open the oxygen valve (4) fully on the handle.
• Open heating oxygen valve (9) on the cutting attachment
fully and rinse out the hose briefly with gas. Long hoses
must be rinsed for longer. Check the pressure on the
pressure reducer and correct as needed (flow pressure).
• Open the fuel gas valve (5) on the handle slightly and let
the fuel gas flow out for a short time. Check the pres-
sure on the pressure reducer and correct as needed
(flow pressure).
• Ignite the flame.
• Open cutting oxygen valve (10, 11) on the cutting attach-
ment and readjust oxygen pressure on the pressure
reducer.
• Adjust the heating flame with flowing cutting oxygen
with the fuel gas valve (5) on the handle and the heating
oxygen valve (9) on the cutting attachment. The torch
is now ready for use.
5.2.2 Gas and Compressed Air Torch (II)
A: Flame Cutting
• Open the oxygen valve (4) fully at the handle.
• Open heating oxygen valve (9) on the cutting attachment
fully andrinse out the hose briefly with gas. Long hoses
must be rinsed forlonger. Check the pressure on the
pressure reducer and correct as needed (flow pressure).
• Completely close heating oxygen valve (9) on the cutting
attachment.
• Open the fuel gas valve (5) on the handle and let the
fuel gas flow out for a short time. Check the pressure
on the pressure reducer and correct as needed (flow
pressure).
• Ignite the outflowing fuel gas mixture.
• Open the heating oxygen valve (9) on the cutting attach-
ment.
• Open cutting oxygen valve (10, 11) on the cutting attach-
ment and readjust oxygen pressure on the pressure
reducer.
• Adjust the heating flame with flowing cutting oxygen
with the fuelgas valve (5) on the handle and the heating
oxygen valve (9) on the cutting attachment. The torch
is now ready for use.
5.3 Operation when flame cutting
• Starting to Cut
Put the torch into cut starting position and heat the
workpiece with the heating flame locally at the ignition
temperature, until it glows red.
Do not melt material! Then open the cutting oxygen
valve and move the torch in the direction of cut.
• Cutting Speed
You can tell the correct cutting speed by the output of
slag, by the vertically flying sparks and by cutting noise.
6. Shutting down
6.3 Extinguishing the flame
A: Welding, brazing, heating up
First close the fuel gas valve (5) on the handle and then
on the oxygen valve (4).
B: Flame cutting
The cutting oxygen valve (10,11) must be closed. First
close the fuel gas valve (5) on the handle and finally the
oxygen valve (9) on the cutting attachment.
6.3.1 Further measures
• With longer gaps in work, close cylinder or offtake valves
as well.
• Release the system by opening the adjustment valves
on the handle.
• Then release the pressure reducer by turning the adjusting
screw.
7. Dealing with errors
7.1 Types of error
• Torch backfire
Occurs due to a decrease in outflow speed, e.g. by conta-
mination of the nozzles when dipping into the weld
pool or due to operating error. The flame goes into the
torch, is extinguished and reignites with a bang. If it
backfires again, stop the torch and allow to cool. Reset
and ignite!
• Torch flashback
During flashback the flame goes further into the torch
and continues to burn in the area of the mixing chamber.
A whistling noise occurs. In this case, immediately shut
off the adjustment valve for oxygen and fuel gas on the
handle in the order of oxygen then fuel gas. In other cases
an altered procedure may be established. If possible
immerse in water (cool down).
• Damage to the torch
If the torch and nozzle fittings leak or there is damage
due to torch flashbacks, sealing at the mixing chamber,
blocked injector nozzles etc., do not start up the torch.
Repairs only to be conducted by Air Liquide.
7.2 Restarting
Flashbacks or backfires in the torch mostly come about
due to too little flow of gas (set on the handle) or blocking
or overheating of the nozzle.
• Cleaning torch and nozzle
See Point 8
• Suction test with injector-type torch
To do this remove fuel gas hose on the handle, open
oxygen and fuel gas adjustment valves and oxygen will
flow out of the torch nozzle. Hold your finger tip on the
fuel gas intake manifold of the handle. If the suction is
good, the finger tip will be sucked on. If no suction is
established, the torch must not be started up. Contact
Air Liquide for inspection and repair.
8. Cleaning, maintenance
and repair
• Keep the Torch Clean.
• Do not grease any parts. Oil or grease may cause
explosions when in contactwith oxygen.
• Torch attachments must only be used with perfect
seals and sealing surfaces.
• As required, clean the outflow openings of the head
tubes and cutting nozzles with a suitable nozzle cleaner
provided for that purpose. Carefully push the nozzle
cleaner in and out without turning it.
WARNING: Twist drills, iron wire etc. will damage the
nozzle channels. Do not widen the nozzle holes. In case
of damage to the outflow opening of a welding or cutting
nozzle, the damage is to be repaired by rubbing with
abrasive paper. Put fine abrasive paper on an even base
and hold the nozzle vertically when rubbing.
• For repairs, contact an Air Liquide point of sale.
• These torches meet the requirements of EN ISO 5172
and are manufactured and tested in accordance with
the engineering rules. No alterations or remodelling are
to be undertaken on the torches without the approval
of the manufacturer.
• Only when using original spare parts are the perfect
operation and safety guaranteed.
• Air Liquide recommends an annual inspection of the
gas welding equipment for safety reasons.
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