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Oxygen Regulator
High Pressure
gauge indicates
pressure in
Oxygen
Cylinder
Relief valve
Gas in from Cylinder
(fitting has normal thread.)
NOTE:
THE REGULATORS SHOWN HERE ARE NOT SUPPLIED WITH THE SGA20 OR SGA60 BUT ARE SHOWN HERE TO ILLUSTRATE
THE REGULATORS REQUIRED FOR A TYPICAL WELDING AND CUTTING SET UP.
4.4.
CONNECTING FLASH ARRESTORS AND HOSES TO THE GAS REGULATORS (fig.1)
4.4.1.
Connect a BLUE colour coded, OXYGEN flash arrestor to the outlet on the OXYGEN regulator. (As shown above, on the left).
4.4.2.
Then, connect a BLUE colour coded hose to the BLUE, OXYGEN flash arrestor. (As shown above, on the left).
4.4.3.
Connect a RED colour coded, ACETYLENE Flash arrestor to the outlet on the ACETYLENE regulator. (As shown above, on the right).
4.4.4.
Then, connect a RED colour coded hose to the RED, ACETYLENE flash arrestor.(As shown above, on the right).
4.4.5.
Tighten all nuts securely with a wrench. If any sign of oil or grease is found on the flash arrestors or regulators discontinue use
immediately.
Note:
New hoses contain a preservative powder which must be blown out before use.
4.4.6.
Prior to attaching the torch, blow out both hoses to eliminate any particles or debris. Perform this on one hose at a time and in a well
ventilated area, otherwise you may create conditions for fire or explosion.
a.
Turn the oxygen or acetylene regulator adjusting screw clockwise to allow 5psi to pass through hose.
b.
Allow oxygen or acetylene to flow for approximately 10 seconds to purge each hose in turn.
4.5.
ASSEMBLING THE TORCH FOR WELDING. (SGA20 & SGA60) (Fig.2)
WARNING! The teflon seal on the welding 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.
4.5.1.
Screw the chosen welding nozzle into the welding attachment making sure that it is fully tightened down.
4.5.2.
Screw the welding attachment with nozzle attached onto the torch handle as shown below. Before fully tightening the ribbed nut,
check that the orientation of the gas valve knobs suits your normal welding practice. Adjust if necessary and fully tighten the ribbed nut.
fig.2
Welding nozzle
© Jack Sealey Limited
Low Pressure
gauge indicates
pressure of oxygen
indicates pressure
out delivered to the
torch
Flashback
Blue Oxygen hose
Arrestor
To increase pressure turn clockwise to decrease
pressure turn anticlockwise
Blue (Oxygen)
Welding attachment
Torch set-up for welding
Original Language Version
Acetylene Regulator
High Pressure
gauge indicates
pressure in
Acetylene
Cylinder
Red (Acetylene)
Low Pressure
gauge indicates
pressure of oxygen
indicates pressure
out delivered to the
torch
Flashback
Red Acetylene hose
Arrestor
Gas in from cylinder
(fitting has a reverse left
hand thread.)
Ordinary thread
Non return valves
Reverse thread
SGA20, SGA60 Issue:1 13/10/22
fig.1
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