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EXtreme360 Multioperator Paks

Top Features

  • Available in 4Pak and 8Pak Configurations
  • Built to Red-D-Arc Extreme-Duty Specifications
  • 350 Amps at 60% Duty-Cycle Output
  • Adjustable Arc Control
  • Processes: Stick (SMAW), TIG (GTAW), MIG (GMAW), Pulsed MIG, Multiprocess, Multioperator, Flux-Cored (FCAW)

These multioperator Paks consist of individual DC inverter-type welders. Each individual welder produces 350 amps at 60% duty cycle for both constant current and constant voltage welding processes. Standard features include Auto-Line, Ammeter and Voltmeter, adjustable Arc Control, full Remote Control capability and Extreme-Duty construction.

Product Details


Individual Module Specifications
Input Power: Requires three- or single-phase power
Rated Output: 50 A at 34 VDC, 60% duty cycle, 3-phase
300 A at 32 VDC, 60% duty cycle, single-phase
Welding Amperage Range: 5 - 425 A, in CC mode
10 - 38 V, in CV mode
Weight: 80 lb (36.3 kg)
Dimensions: H:17" (432 mm) W:12.5" (318 mm) D:24" (610 mm)
Input Power Range: 208-575/1/3/50/60
4Pak Specifications
Weight: 700 lb (320 kg)
Dimensions: H: 54.5" (1384 mm) W: 31.5" (800 mm) D: 32" (813 mm)
Input Power: 460/575/3/50/60
8Pak Specification
Weight: 1400 lb (640 kg)
Dimensions: H: 109" (2768 mm) W: 63" (1600 mm) D: 64" (1626 mm)
Input Power: 460/575/3/50/60


Stick (SMAW)



Pulsed MIG
  • Pulsed MIG (GMAW-P) with optional Optima Control

  • Multiprocess


    Flux-Cored (FCAW)

    Additional Features

    4Paks and 8Paks include DP120 panels and operate with 460/575/3/60 input power. These Paks are easily maneuvered around most jobsites when mounted on the optional wheel kit. Excellent stick welding performance with up to 425 DC amps per arc combined with the features of a high-end MIG machine make this a very versatile system.

    Auto-Line Power Management Technology allows for operation with any type of primary power from 208 to 575 VAC, single- or three-phase, 50 or 60 hertz, with no manual linking required - ideal for dirty or unreliable input power. 4Pak and 8Pak Multioperator units include DP120 Panels and operate with 460/575/3/60 input power. Wind Tunnel Technology protects electrical components and PC boards from contamination. Fan-On-Demand cooling system operates only when needed, reducing noise, energy use and amount of contaminents pulled through the machine. Lift-Arc allows TIG starting without the use of high-frequency. Starts the arc without contaminating the weld with tungsten. Adaptive Hot Start increases the output amperage at the start of the weld if necessary, eliminating electrode sticking. Inverter arc control provides greater puddle control for superior electrode performance. Line voltage compensation keeps power constant even if power input varies by ± 10% on 575 volt power and +37%/-59% on 460 volt power. Process selector switch reduces the number of control setup combinations without reducing any features. Large, dual digital meters are easy to view and presettable to ease setting weld output. Pulsed MIG capabilities with optional Optima control reduces spatter and distortion, allows better out-of-position puddle control, and provides potential reduction of fume particle emission. Lightweight, aerospace-grade aluminum case offers protection with the benefit of reduced weight. Optional 114 VAC auxiliary power is available.

    • CC/CV welding processes with full remote-control capability
    • Auto Remote Sense enables unit to automatically use remote control if connected to remote control receptacle
    • Potentiometer-type remote control
    • Exceptional electrical efficiency (87.24% efficiency at 400A)
    • Power factor of .95 enables smaller fuses/breakers and primary wiring
    • Selectable Low-OCV Stick mode reduces open circuit voltage to nearly 15 volts when welding power source is not in use
    • Extreme-Duty environmental protection with ultra-tough, poly carbonate-blended control panel cover
    • Tweco style output terminals
    • Wind Tunnel Technology protects electrical components and PC boards from contamination
    • Line Voltage Compensation keeps welding output constant with power variations of +/- 10%
    • CSA certified to both U.S. and Canadian Standards for welding equipment

    Options, Accessories and Related Equipment

    Wheel kit
    Remote control
    115 VAC auxiliary power
    Gas solenoid for TIG welding
    Water cooler
    Pulse MIG control
    Pulse TIG control
    Spool gun

    Related Equipment
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    Optima pulse MIG control
    Intellitig-4 pulse TIG control
    LN25 wirefeeder
    RC1 remote control

    EXtreme360 Multioperator Paks

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    Airgas, an Air Liquide company, is the nation's leading single-source supplier of gases, welding and safety products. Known locally nationwide, our distribution network serves more than one million customers of all sizes with a broad offering of top-quality products and unmatched expertise.