Heavy duty pulse DC tig welding machine PROTIG-320CT
Heavy duty pulse DC tig welding machine PROTIG-320CT
Heavy duty pulse DC tig welding machine PROTIG-320CT
Heavy duty pulse DC tig welding machine PROTIG-320CT
Heavy duty pulse DC tig welding machine PROTIG-320CT
Heavy duty pulse DC tig welding machine PROTIG-320CT

Item specifics

Rated Input Voltage
3PH ~ 400V ±15%
Rated Output
Max Open Circuit Voltage
9.13 KVA
Open Circuit Voltage
Welding Current/Voltage Range
Power Factor
1 year warranty

Product review


  • PROTIG-320CT

    Refined TIG welding for industrial applications

    • Application:

      Metal fabrication workshops
      Shipyards and offshore industry
      Chemical and process industry
      Steel structure workshops
    • Processes:

      DC TIG
      Stick (SMAW)
    • Input Power: 340-460V, 3-Phase 

      Rated Output at 40℃ (104℉):
      320A at 22.8V @60% Duty Cycle
      Weight: 70kg



    Conventional Pulsed TIG

    Typically from 0.2 to 10 PPS. Provides a heating and cooling effect on the weld puddle and can reduce distortion by lowering the average amperage. This heating and cooling effect also produces a distinct ripple pattern in the weld bead. The relationship between pulse frequency and travel speed determines the distance between the ripples. Slow pulsing can also be coordinated with filler metal addition and can increase overall control of the weld puddle.

    High Speed Pulsed TIG

    In excess of 40 PPS, Pulsed TIG becomes more audible than visible—causing increased puddle agitation for a better as-welded microstructure. Pulsing the weld current at high speeds — between a high Peak and a low Background amperage — can also constrict and focus the arc. This results in maximum arc stability, increased penetration and increased travel speeds.

  • Item No PROTIG-320CT
    Rated Input Voltage 3PH ~ 400V ±15%
    Max. Load Power Capacity TIG: 9.13KVA
      MMA: 10.38KVA
    Rated Duty Cycle(40℃) 60% TIG: 320A/22.8V
      MMA: 250A/30V
    100% TIG: 250A/20V
      MMA: 200A/28V
    Welding Current/Voltage Range TIG:5A/10.2V~320A/22.8V
      MMA: 20A/20.8V~250A/30V
    Open Circuit Voltage 70V~80V
    Power Factor 0.85
    Efficiency 85%
    TIG Pulse Frequency 0.2Hz~200Hz
    Pulse Width (Ratio) 1~100%
    Arc-starting Current 5A~320A
    Crater-filling Current 5A~320A
    Current Up-slope Time 0.1S~15S
    Current Down-slop Time 0.1S-15S
    Pre-Gas Time 0.1S-15S
    Flow-Gas Time 0.1S-15S
    Spot Arc Time 0.1S-10S
    MMA Arc Force 10A~250A
    Hot Start Time 0.1-3S
    Hot Start Current 10A~250A
    Dimension (LxWxH) 960X420X900mm
    Weight (KG) 70 KG

    Water-cooling Unit: WC-150

    Operating Voltage 230V 50/60Hz
    Rated Power 260W
    Cooling Power 1.5KW(1L/MIN)
    Maximum Pressure 0.3MPA/60HZ
    Recommended Cooling Liquid 20%~40% ethanol/water
    Tank Volume 6.5L
  • For Standard accessories



    TIG torch:TIG-12



    Electrode holder with cable 2M
    Earth clamp with cable 2M

    For Optional accessories






    Argon gas regular






    Foot Pedal



    Water-cooling unit: WC-150

  • Q:Are you a factory or a trading company?

    A: We are factory with more than 10 years manufacturing experience and we provide perfect OEM and after-sale service.

    Q:How can I pay my order?

    A: We accept T/T, Western Union, Alibaba Trade Assurance payments. For those orders less than 1000USD, we accept PayPal to pay.

    Q:How about your warranty?

    A: We offer 3-year product life guarantee ,and a generous 1 year warranty on al purchases that begins with the bill of lading.

    Q: Do you have a CE certificate?

    A: For every model of machine, it has a CE certificate.

    Q:How can I get the quotation?

    A: We usually quote within 24 hours after we get your inquiry. If you are urgent to get the price,please send the message on trade management or call us directly

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