Measuring and decreasing fume extraction air flow

Fume extraction guns need to provide the appropriate amount of shielding gas to protect the weld from defects without compromising the fume capture efficiency of the gun. If the fume extraction air flow is too strong, it captures shielding gas. If the fume extraction air flow is too weak, it doesn't capture welding fumes effectively enough.

Before welding, measure the fume extraction air flow with a fume extraction air flow meter (sold separately).

Measuring fume extraction air flow

1.

Insert the vacuum nozzle of the welding gun into the fume extraction air flow meter.

2.

Turn the fume extraction on.

* Fume extraction air flow

For adjusting the fume extraction air flow at the fume extraction unit, refer to the operating manuals of the fume extraction unit manufacturer.

Decreasing fume extraction air flow

To decrease the fume extraction air flow, use the air flow bypass valve at the gun handle.