Welding Industries Australia

1300 300 884


Big Blue 800X Duo Air Pak

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  • Railroad Maintenance
  • Mining Maintenance
  • Maintenance & Repair
  • Submerged Arc
  • Stick
  • MIG
  • Flux Cored
  • DC TIG
  • Compressed Air
  • Air Plasma Cutting & Gouging
  • Air Carbon Arc
  • Constant Current & Constant Voltage Weld Output
  • Direct Current Weld Output
  • Single Phase Input Power

A Complete Mobile Welding, Air & Power Workshop for Onsite Maintenance & Fabrication.

Check out the Big Blue 800X Duo Air Pak promo page to see how you can Save 6 Ways!

Better Than Ever!

Same Great Reliability Plus:

  • Dual operator capability
  • Three Phase Power
  • Lower running costs
  • More Weld & Auxiliary Power
  • Vandal Proof Doors
  • Factory Fitted VRD

Dual Operator

Two independent arcs, with up to 400 Amps each. Now two operators can work off one power source.

Lower Running Costs

A dual operator engine drive cuts running costs:

  •     Engine Servicing
  •     Fuel
  •     Compressor Servicing
  •     Compliance Testing

Three Phase Power

Run lighting and tools onsite or an XMT Inverter giving you three arcs up to 260 Amps each.

Model Upgrade Options

Reduce mine spec modification costs. Model upgrade packages include: double polarity battery isolator, 'E' stop and/or bash frame and spill tray.

Serious Power

800 Amps of weld output.

27,000 watts of three phase, 415V
power (dependent of weld output).

5,500 watts of single phase, 240V
power (independent of weld output).

Deutz Turbocharged Engine

Consumes as little as 1.4 L/hour at idle speed.

Lower Capital Investment

Cut initial capital investment costs in half by reducing the number of engine drives in a standard fleet.

Vandal Proof Doors

For onsite security.

Infinite Arc Control

Change the arc characteristics for specific applications in Stick, MIG and FCAW.

Ingersoll Rand Compressor

Ultra-reliable Ingersoll Rand industrial rotary screw compressor has a life expectancy of 30,000 hours, resulting in longer service intervals.


Increased Efficiency

More arcs and better fuel economy equal increased profits for your business. Estimated savings are 34 percent with a dual-operator unit versus two single-operator units.

Electronic Engine Display

Simultaneously displays fuel level, engine hours, coolant temperature, oil pressure, battery volts, engine RPM, air pressure, and compressor hours. Also tracks oil change intervals and displays engine diagnostics for quick and easy servicing.

VRD Standard (Cat.C AS1674.2)

Reduces the open-circuit Voltage to 15 Volts when the welding power source is not in use, increasing operator safety without compromising arc starts.

Auto Remote Sense

(ARS) detects if a remote control is plugged into the 14-pin receptacle and eliminates confusion of a remote/panel switch.

Thermal Overload Protection

Prevents machine damage if the duty cycle is exceeded or airflow is blocked.

Standard Features

  • Digital weld meters.
  • Automatic idle.
  • Anti Vandalism Kit.
  • Lockout/tagout battery disconnect switch.

Auxiliary Power*

  • 1 x 380 V 32 Amp Sockets.
  • 2 X 240 V 15 Amp Sockets.
  • RCD.

*Generator auxiliary power is 60Hz, and intended for operating equipment associated with welding, such as angle grinders, drills and floodlights. Some Australian 50Hz equipment incorporating induction motors, such as pumps, fans, air compressors, refrigeration or air-conditioners, may not operate correctly and could be damaged. Refer to appliance supplier or manufacturer to confirm suitability.

3 Year Warranty

Welder/generator is warranted by Miller for 3 years, parts and labour. For details, refer to the Miller warranty statement. Engine is warranted separately by engine manufacturer.

Welding ModeOutout ModeWeld Output RangeWeld Output
Rated at
104° F (40° C)
Max Open
Circuit Voltage
Generator Power Output Rated at 104° F (40° C)Soung Levels
at 23 FT. (7M)
Dimensions (mm)Weight*
(Without Fuel)
20 - 400 A400 A at 36 V,
100% Duty Cycle (Each Side)
85 VDC
15 VDC

3 Phase:
27,000 Watts peak,
20,000 Watts
continuous (dependent of weld output)

1 Phase:
5,500 Watts peak,
4,000 Watts
continuous (independent of weld output)

73.0 dB (97.8 Lwa),
77.2 dB at one metre from front panel

Weld (800 A Load): 81.7 dB
(106.5 Lwa), 84.4 dB at one metre from front panel

H: 1194
H: 1397 (top
of exhaust)
W: 724
D: 1765

Net: 968.4 kg

Ship: 991.6 kg

*Additional: 75 kg when fuel tank is full

Model Upgrade Version:*
Net: 1040kg (w/out fire extinguisher)
*Part No MR907563-3

40 - 800 A700 A at 44 V,
100% Duty Cycle
800 A at 38 V,
100% Duty Cycle
(Dual Outputs)
14 - 40 V400 A at 34 V,
100% Duty Cycle (Each Side)
14 - 40 V750 A at 40 V,
100% Duty Cycle
800 A at 38 V,
100% Duty Cycle
Engine BrandHPTypeFeaturesEngine SpeedsCapacitiesAutomatic Engine Shutdown
63.4Turbo-charged four-cylinder, liquid-cooled industrial dieselEPA Tier 4i compliantIdle: 1350 RPM
Weld: 1800 RPM
Fuel: 95 L
Oil: 10.4 L
Coolant: Integrated Oil

Low Oil Pressure, High Coolant
Temperature, Low Fuel Level

Compressor BrandFeaturesFree Air Delivery at 1850 RPMFree Air Delivery at 1235 RPMWorking Pressure ConstantDuty CycleOil CapacityAutomatic Compressor Shutdowns
CE55 G1
Rotary screw with electric clutch for on/off.
Oil change intervals 500 hrs (same as engine). Life expectancy 30,000 hrs.
60 cfm (1.70 m³ / min)40 cfm (1.13 m³ /
min) Idle
100 PSIG 7 bar100%

3.79 L

Oil Temperature