This table is only valid for the PTW 3500 in conjunction with a FK9000 cooling
unit:
ø Plasma nozzle Plasma gas flow rate Max. welding current
2.0 mm Min. 1.0 l/min 170 A
2.5 mm Min. 1.0 l/min 190 A
3.2 mm Min. 1.0 l/min 210 A
3.5 mm Min. 1.0 l/min 225 A
4.0 mm Min. 1.0 l/min 250 A
Table is only valid for the PTW 3500 in conjunction with a CHILLY 15 cooling
unit:
ø Plasma nozzle Plasma gas flow rate Max. welding current
2.0 mm Min. 1.0 l/min 225 A
2.5 mm Min. 1.0 l/min 250 A
3.2 mm Min. 1.0 l/min 275 A
3.5 mm Min. 2.0 l/min 300 A
4.0 mm Min. 2.0 l/min 350 A
Minimum plasma gas flow rate:
Amount of gas at which the welding arc still remains stable.
IMPORTANT! Welding using a minimum plasma gas flow places a severe load on
the plasma nozzle and should be avoided.
Maximum plasma gas flow rate:
Amount of gas that makes working with the maximum welding current possible,
depending on the plasma nozzle
Maximum welding current:
Welding current permitted when using a particular plasma nozzle, standard
tungsten electrode setting and minimum or maximum plasma gas flow rate.
IMPORTANT! Use pure argon as plasma gas. The limit values listed above can on-
ly be obtained using pure argon.
Loading limit ex-
ample (PTW
1500)
In the case of a plasma nozzle with a diameter of 2.0 mm and a selected mini-
mum plasma gas flow rate of 0.35 l/min, a maximum welding current of 80 A is
permitted for the standard tungsten electrode setting.
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