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Not available for sale in the USA

Big Blue® 700 Duo Pro

The Big Blue 700 Duo Pro is a complete multi-process and multi-operator welder/generator that delivers two independent pipe welding quality arcs in one complete package.


  • Stick (SMAW)
  • MIG (GMAW)
  • Flux Cored (FCAW)
  • Air Carbon Arc (CAC-A) single weld mode - 3/8 in ( 9.5mm) carbons; dual weld mode - 1/4 in (6.4 mm) carbons


Heavy Industrial

  • Pipe Welding
  • Mechanical Contractor
  • Construction
  • Repair


Output Power Range

  • Single weld mode: CC: 40 – 800 A,
    CV: 14 – 40 V
  • Dual weld mode: CC: 20 – 400 A,
    CV: 14 – 40 V

Generator Power - rated at 104°F (40°C)

  • 32,000 watts peak - 24,000watts continuous (sum of both generators

Net Weight

  • 1729 lb (784 kg)


  • Deutz D2011L04i Diesel: 48.6 HP at 1850 RPM EPA Tier 4i Compliant


Special Offers


Product Literature (PDF)

Engine-Driven Resources

Multi-arc welding is better than ever!

One dependable engine with two
premium pipe-quality arcs, allow
operators to work independently of
each other with no arc interaction. Full
multiprocess capability provides the
best Stick, MIG, Flux-Cored and TIG
performance available. Multioperator
welding was never easier, simpler or
more versatile. It’s a one-of-a-kind, go-anywhere engine drive.

The Professional Welder’s Choice—
designed with the professional in
mind, the Big Blue 700 Duo Pro is the
best for arc performance, ease of use and reliability.

Double the amperage output. Deluxe
models have a parallel switch that
combines both independent outputs to
a single side. This provides a safe and
easy way to run large electrodes, Stud weld or Carbon Arc gouge.

Increase profits with this multi-arc
machine by completing your most
demanding jobs in half the time compared
to conventional engine-driven welders.
With two arcs in one engine drive, fewer
machines are required for a job.

Thermal overload protection prevents
machine damage if the duty cycle is
exceeded or airflow is blocked.

Standard features include: Stick, MIG, Flux-Cored, Lift-Arc™ TIG, and digital preset weld meters, output contactor control and automatic idle.

Deutz D2011L04i diesel. Heavy-duty low-speed industrial engine is
designed to operate over 10,000 hours
before the first basic overhaul. Backed
by worldwide support and service.

Meter maintenance displays
• Fuel gauge
• Hour meter function
• Oil change interval
• High coolant temperature and
low oil pressure shutdowns
• Low fuel shutdown—engine shuts
down before system runs out of fuel, making restarts easy.

Independent generators provide the
flexibility, dependability and reliability
you need to get the job done right. One
5500-watt-peak /4000-watt-continuous,
single-phase generator is fully indepen -
dent of weld output. 5500 watts of
power is available anytime the engine
is running, even while welding at
700 amps! The second generator has
27,000 watts peak and 20,000 watts
continuous available for your high
power needs.

Includes parallel switch, 32 kW auxillary generator power, intake manifold heater and oil pan heater.

Powerline Financing