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3.5
asseMBlinG tHe tORcH FOR cuttinG.
waRninG! the teflon seal on the cutting attachment inlet must not be damaged or missing, otherwise gases will mix
inside the torch and result in flashbacks or backfires. Always inspect the seal, coupling nut and torch head for damage or
oil. If either is found, discontinue use and contact your supplier.
3.5.1
to change the cutting nozzle loosen and remove the nut which holds it in place and withdraw the nozzle. slide the chosen
cutting nozzle through the nut and screw the assembly into the cutting attachment and fully tighten down.
3.5.2
screw the cutting attachment with nozzle attached onto the torch handle as shown below. Before fully tightening the the
ribbed nut, adjust the orientation of the gas valve knobs so that they do not block the movement of the lever (B).
3.6
cOnnectinG tHe nOn-RetuRn valves and HOses tO tHe tORcH.
3.6.1
Always fit the non-return valves provided to the torch before connecting the respective hoses. the non-return valves
provided have different direction threads to ensure that they are fitted to the correct side of the torch. the oxygen
non-return valve has a normal thread and will fit to the blue coded side of the torch (see colour coding on valve knobs).
the Acetylene non-return valve has a reverse thread and will fit to the red coded side of the torch (see colour coding
on valve knobs).
3.6.2
connect the two hoses to the respective non-return valves fitted to the torch handle.
waRninG! If traces of oil or grease are found, dO nOt use. contact your gas supplier immediately.
4.
weldinG OPeRatiOn
iMPORtant! leak test all cOnnectiOns and valves PRiOR tO eacH use OF tHe eQuiPMent.
note:
these instructions are intended to describe the facilities and operation of the welding/cutting torch. they are not
intended to teach you how to weld or cut using oxyacetylene. if you have no experience of welding/cutting using
oxyacetylene it is essential that you seek training from a qualified person or approved training organisation.
4.1
Assemble the torch for welding as described in section 3.4 (see also fig.2)
4.2
settinG tHe Gas ReGulatOR PRessuRes close the regulators by turning the adjusting screws anti-clockwise to
relieve the pressure on the diaphragm before opening the cylinder valves. slowly open the cylinder valve on the oxygen
and acetylene bottles in turn. As you do so the high pressure gauge (left hand) on each regulator will register the pressure
in the cylinder to which it is attached.
4.2.1
slowly open each regulator in turn by turning the adjusting knob clockwise. As you do so the outlet pressure gauge (right
hand) on each regulator will register the outlet pressure of gas being fed to the torch. Adjust the pressure according to the
size of nozzle in use and the thickness of the material to be cut or welded. refer to section 7.2 in the chart overleaf.
waRninG! never set acetylene regulator at a delivery pressure above 15psi (1bar).
4.2.2
After adjusting the regulators to the desired operating pressures check connections for leaks using an approved leak
detection solution. check for leaks at all connections. If a leak is found, tighten fitting more securely. If leak persists,
discontinue use and call your supplier.
4.2.3
Briefly open and close the oxygen valve on the torch handle to check that the gas is flowing.
4.2.4
similarly open and close the acetylene valve on the torch handle to check that the gas is flowing.
waRninG! Always use welding gloves and suitable eye protection when welding or cutting. contact your local sealey
dealer for a full range of protective equipment.
4.3
liGHtinG tHe tORcH ensure that the gas hoses will not be in the way of the torch when ignited. ensure that the torch
is facing away from you before lighting.
4.3.1
Holding the torch in one hand and the striker in the other open the acetylene valve a 1/4 turn (the valve knob is colour
coded red). operate the striker close to the tip to light the acetylene.
4.3.2
the first flame that appears will be an orange/yellow colour giving off a small amount of black smoke from its tip. If too
much acetylene is flowing the flame will be standing away from the tip of the torch making a roaring noise. In extreme
cases this type of flame can blow itself out. to correct such a flame reduce the amount of acetylene until the flame is 8 to
10 inches long with less black smoke.
4.3.3
once the acetylene flame is set correctly begin to introduce oxygen by slowly opening the oxygen control valve on the
torch (the valve knob is colour coded blue). the flame will change to a whitish colour and the black smoke will disappear.
this flame is not hot enough for welding.
4.3.4
Add more oxygen to the flame by further opening the control knob until a brilliant neutral flame is achieved.
© Jack sealey limited
fig.2
Original Language Version
fig.3
sgA1.V3
Issue: 1 - 27/09/13
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