5 OPERATION
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© ESAB AB 2021
8. Slowly and carefully open the cylinder valve until the maximum pressure shows on the high
pressure gauge.
Figure 18: Open cylinder valve
9.
On all cylinders, except acetylene, open the valve completely to seal the valve packing. On
gauge less regulators, the indicator will register the cylinder contents open.
CAUTION!
Keep the cylinder valve wrench, if one is required, on the cylinder valve to turn OFF
the cylinder quickly, if necessary.
10. Attach the desired downstream equipment.
5.2
Leak
testing
the
system
Leak test the system before putting into operation.
1) Be sure that there is a valve in the downstream equipment to turn OFF the gas flow.
2) With the cylinder valve open, adjust the regulator to deliver the maximum required delivery
pressure.
3) Close the cylinder valve.
4) Turn the adjusting screw/knob counter-clockwise one turn.
•
If the high-pressure gauge reading drops, there is a leak in the cylinder valve, inlet
fitting, or high-pressure gauge.
•
If the low-pressure gauge drops, there is a leak in the downstream equipment, hose,
hose fitting, outlet fitting or low-pressure gauge. Check for leaks using an approved
leak detector solution.
•
If the high-pressure gauge drops and the low-pressure gauge increases at the same
time, there is a leak in the regulator seat.
•
If the regulator requires service or repair, take it to a qualified repair technician.
5) Once leak testing has been performed and there are no leaks in the system, slowly open the
cylinder valve and proceed.
WARNING!
If a leak has been detected anywhere in the system, discontinue use and have the
system repaired. DO NOT use leaking equipment. Do not attempt to repair a leaking
system while the system is under pressure.
