MetFab - Air Products Welder's Handbook - Flipbook - Page 50
Purging the system
• Turn the pressure adjusting screw
clockwise on the oxygen regulator to
set the outlet pressure required for
the type of nozzle fitted. The correct
outlet pressure information is normally
supplied by the nozzle manufacturer.
• Open the oxygen valve on the torch.
The pressure will fall slightly. Adjust the
oxygen pressure shown on the regulator
back to the correct level.
• Close the valve on the torch. You have
also purged the oxygen hose.
• Repeat the above steps for the fuel gas
cylinder.
• Leak test all joints with an approved
oxygen-compatible leak-detection fluid
prior to use.
This operation should take place in a
well-ventilated space away from any
source of ignition.
Never open both torch valves at the same
time when purging the system.
It is essential that the system is purged
after each period of prolonged non-use
(see ‘closing down’ procedure on page 47).
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