Torch Selector Table
Amperages and duty cycles alone are arbitrary measures of a torches capability.
For a more accurate appreciation wire type, gas type, flow rate and open circuit voltage must all be taken into consideration. The XP8 is rated in Amps as a guideline but the Kilowattage requirement of a given application provides a far more accurate method for calculating torch selection.
Kilowattage represents the total power rating required and is calculated as follows:
Welding Amps x Welding Volts |
= kW |
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1000 |
(Amps x Volts = Watts , 1000 Watts = 1 kW)
Will the gas I use affect the performance of the torch?
The simple answer is yes. The use of different gas types can have a marked effect on the performance of air cooled torches. Generally the higher the content of CO2 in the shielding gas the better the performance of the Mig torch.
How do I select a torch using Kilowattage?
If a torch is required to weld at 300 Amps with a welding voltage of 34 volts the kilowattage is 10.2 kW.
ie Welding Amps 300 x Welding Volts 34 |
= 10.2 kW |
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1000 |
Ideal torches for the applications would therefore be the XP8 350A for an air cooled 80% duty requirement or the XP8 450W for a water
cooled 100% application.
Torch selector table for mild steel wires (80/20) Argon/CO2 shielding gas.
| Mixed Gas (80/20) | xx | xx | ||||||
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| Model | Amps | kW | Duty Cycle | Maximum Wire Size | ||||
| xx | XP8-200A | 200 | 6.0 | x | 80% | .0459/1.2mm | xx | |
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| XP8-300A | 300 | 8.7 | 80% | .0459/1.2mm | ||||
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| XP8-350A | 350 | 10.5 | 80% | 1/169/1.6mm | ||||
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| XP8-400A | 400 | 12.0 | 80% | 3/329/2.4mm | ||||
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| XP8-320W | 320 | 9.6 | 100% | 1/169/1.6mm | ||||
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| XP8-450W | 450 | 15.8 | 100% | 3/329/2.4mm | ||||
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Note: All ratings quoted are based on a nominal gas flow of 18lpm.
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