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SECTION 3
OPERATING INSTRUCTIONS
CONNECTING
1. Attach regulators to the oxygen and fuel gas cylinders. Follow
all instructions supplied with your regulators.
2. Attach oxygen and fuel gas hoses (see Note 1 in Operating
Data section on page 4 for recommended hose sizes) to the
regulators and to the torch handle, after making sure all metal
seating surfaces are clean. Tighten all connection nuts with
a wrench.
3. Using Welding or Heating Head: Remove welding head
connection nut from torch handle. Insert welding head into
handle using slight back and forth twisting motion as you
push. Slip connection nut over the head and hand-tighten
to handle.
Using Cutting Attachment: Set the welding head connec-
tion nut aside and insert the cutting attachment to the torch
handle in the same manner as the welding head. Remove
nozzle nut and insert cutting nozzle into the cutting at-
tachment head. Slip nut over the nozzle and tighten with a
wrench.
4. Check throttle valve packing nuts for tightness.
WARNING
Flashbacks can cause serious burns.
Be sure gas flow is sufficient for head or nozzle size.
Adjust regulators for proper psig pressures.
Adjust throttle valves properly.
Keep torch in good repair.
DO NOT throttle back gases to use large head or nozzle on thin
material.
ADJUSTING GAS PRESSURES
Fuel Gas: With oxygen valve closed, open the fuel gas valve on
the torch handle about one turn. Turn in the pressure-adjusting
screw on the fuel gas regulator until its delivery-pressure gauge
indicates the desired pressure (refer to operating tables starting
on page 5). Then immediately close the torch fuel gas valve.
Oxygen, Using Welding or Heating Head: Open the torch oxygen
valve at least 1-1/2 turns. Adjust oxygen pressure at the regulator
to the desired pressure (refer to Table 2, 3 or 4) and then close
the torch oxygen valve.
Oxygen, Using Cutting Attachment: Open the torch oxygen
valve WIDE and leave the preheat oxygen valve on the cutting at-
tachment closed. Depress the cutting oxygen valve lever on the
cutting attachment. Adjust the oxygen pressure at the regulator
to the desired pressure (refer to table 5, 6, 7 or 8). Shut off the
oxygen flow by releasing the cutting oxygen valve lever only.
TESTING FOR LEAKS
Every welding and cutting outfit should be thoroughly tested for
leaks after it is first hooked up, and at regular intervals thereafter.
After all connections have been made, make sure both valves on
the torch handle are closed. Then turn in the regulator pressure-
adjusting screws clockwise until the oxygen delivery-pressure
gauge registers 50 psi, the fuel gas delivery-pressure gauge
registers 10 psi. Using Leak Test Solution suitable for oxygen
service, such as P/N 998771 (8oz. container), check for leaks at the
cylinder valves, the cylinder-to-regulator connections, the regu-
lator-to-hose connections, and the hose-to-torch connections. If
bubbling at any point indicates leakage, tighten the connection.
If this does not stop the leakage, close the appropriate cylinder
valve, open the torch valve to remove all pressure from the line,
and finally release the regulator pressure-adjusting screw by
turning it counterclockwise. Then break the leaky connections,
wipe metal seating surfaces with a clean, dry cloth, and examine
them for nicks and scratches. Remake the connection(s) and
retest. Do not try to light the torch until you are satisfied that
all connections are gas-tight.
LIGHTING & FLAME ADJUSTMENT
CAUTION:
Use friction lighter for lighting torch. Do NOT use
a match. Use of a match can seriously burn your
hand.
Welding or Heating Head (Acetylene)
1.
Open fuel gas valve about 1/2 turn and light the gas at the
tip.
2.
Slowly close the fuel gas valve until the yellow flame just
starts to throw off smoke.
3.
Open oxygen valve slowly until you have a neutral flame.
4.
If harsher or soft flame is desired, readjust the two valves.
NOTE:
When operating with a very soft flame, the welding
head will tend to heat up and transfer some of this
heat back to the torch handle. This may create some
discomfort to the operator.
Heating Head (Fuel Gases except Acetylene)
1.
Crack fuel gas valve and light the gas at the tip.
2.
Open fuel gas valve until flames start to leave end of tip.
3.
Slowly open oxygen valve until flames are at their shortest
lengths.
4.
If necessary, alternately open fuel gas and oxygen valves to
the desired flame size.
Cutting Attachment (Acetylene)
1.
Open the acetylene valve on the torch handle about 1/2
turn, and light the gas at the nozzle.
2.
Slowly close the acetylene throttle valve until the yellow
flame just starts to throw off black smoke.
3.
Slowly open preheat oxygen valve on cutting attachment
until neutral flames are obtained.
4.
Finally, open the cutting oxygen valve by depressing lever
and readjust the neutral flames by turning preheat oxygen
valve.
The flame now has the proper strength for any cutting job. With
this flame, acetylene is being consumed economically and the
cutting attachment will be operating at best resistance to flash-
back. If greater preheat flame temperature is desired for faster
9
OPERATION
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