Fronius MTG 400i K4 Manual De Instrucciones página 31

Information on the extraction system, intended
use
Intended use The MIG/MAG manual welding torch is intended solely for MIG/MAG welding in
manual applications.
Any other use is deemed to be "not in accordance with the intended purpose."
The manufacturer shall not be liable for any damage resulting from such impro-
per use.
Intended use also means:
-
-
Requirements It is recommended to only connect den Schweißbrenner to extraction units that
for the extrac-
meet the following requirements:
tion unit
1.
2.
Cooling type
Water-cooled
Recommended negative pressures for gas-cooled and water-cooled welding torches
Following all the instructions in the Operating Instructions
Carrying out all the specified inspection and maintenance work
Extraction capacity of at least 100 m
- if the value is lower, there is a risk that the welding fumes will not be
completely extracted
- a higher value means there is a risk that shielding gas will be unintentio-
nally sucked off the weld seam
At least 13,000 Pa (130 mbar) generated negative pressure
- with longer welding torches, the volumetric flow (and thus also the nega-
tive pressure) in the welding torch must be increased accordingly
- the following table shows the recommended negative pressure for a gas-
cooled welding torch and a water-cooled welding torch in each case
- the following diagram shows the relationship between the volumetric
flow and the negative pressure generated in the welding torch (= extrac-
tion characteristic curve)
Gas-cooled
3
/h (= volumetric flow)
Welding torch length
4.5 m (13 ft. 9.17 in.)
4.5 m (13 ft. 9.17 in.)
Recommended
negative pres-
sure
13,000 Pa
(130 mbar)
18,000 Pa
(180 mbar)
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