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The Miller Big Blue 800 Duo Air Pak is the pinnacle of industrial welding power and versatility. Designed for the most demanding job sites, this multi-process diesel engine-driven welder delivers a massive 800 amps of welding output in single-operator mode, or 400 amps per side for two independent operators. Powered by a robust Deutz TD2.9 L4 T4F turbo-charged diesel engine, this machine is engineered to perform in harsh environments ranging from structural steel erection to mining maintenance and pipeline construction.
What sets the Air Pak model apart is the integrated Ingersoll Rand rotary screw air compressor. Delivering 60 CFM at 100 PSI with a 100% duty cycle, it eliminates the need for a separate tow-behind compressor. This integration reduces fuel consumption, lowers maintenance costs, and frees up valuable truck bed space. The compressor features an independent on/off control, allowing it to run only when needed, further extending the service life of the components.
The "Duo" designation signifies a major leap in productivity. A simple paralleling switch on the front panel converts the machine from a single 800-amp beast into a dual-operator workstation. Two welders can work simultaneously with no arc interaction, effectively replacing two separate engine drives. This capability translates to estimated fuel savings of up to 34% compared to running two individual units, maximizing your return on investment.
Equipped with Miller's exclusive ArcReach technology, the Big Blue 800 allows operators to adjust voltage and amperage directly at the wire feeder or remote, without the need for fragile control cables. The control signals are sent through the existing weld leads. This feature not only reduces cable clutter and maintenance costs but also significantly improves safety by reducing the number of trips an operator must make back to the power source over uneven terrain.
Beyond welding and air, this unit is a formidable power plant. It provides 20,000 watts of continuous 3-phase power and 12,000 watts of single-phase power, easily running job site tools, lights, and plasma cutters. The included industrial USB port ensures your machine stays up to date with the latest software and allows for easy retrieval of diagnostic logs.
| Additional Information |
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| Brand:Miller |
| Weld Process:Engine Drive, Multi-Process, Submerged Arc (SAW) |
| Amperage:800, 400 |
| Duty Cycle:100% |
| Watts:12000 W, 20000 W |
| Engine Brand:Deutz TD2.9 L4 T4F |
| Fuel Type:Diesel |
| Air Compressor:Ingersoll Rand Rotary Screw, 60 CFM |
| Generator Output (3 Phase):20,000 Watts Continuous, 27,000 Watts Peak |
| Generator Output (1 Phase):12,000 Watts Continuous, 15,000 Watts Peak |
| Weld Output (Single Operator):800 A at 38 V, 100% Duty Cycle |
| Weld Output (Dual Operator):400 A at 36 V, 100% Duty Cycle (per side) |
| Dimensions:46 in (H) x 28.5 in (W) x 69.5 in (L) |
| Net Weight:950 kg (2095 lbs) |
| Packaging Description:1 PER EA |
