Miller® Big Blue® 800 Duo Pro Series Engine Driven Welder #907587

A complete multi-process & multi-operator welder/generator that delivers two independent pipe quality arcs in one complete package. Upgrade to the SF model to unlock advanced RMD® & Pulsed MIG processes with the FieldPro™ Smart Feeder.

Multi-Arc Welding

One dependable engine—two independent arcs with up to 400 amps each. Or plug in additional inverters for a true multi-operator work platform! Example: Two additional XMTs equals four operators, up to 200 amps each. Premium-quality arcs allow operators to work independently with no arc interaction. Multi-operator welding has never been easier or more versatile.

Electronic Engine Display

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

Infinite Arc Control

Allows the arc characteristics to be changed for specific applications in Stick, TIG, MIG and FCAW.

Low OCV Stick (VRD)

Reduces the open-circuit voltage to 15 volts when the welding power source is not in use. This feature increases operator safety without compromising arc starts.

FieldPro™ Smart Feeder Compatible (SF Model Only)

Advanced RMD & Pulsed MIG processes are now available in an engine-driven welder/generator. Discover increased productivity, quality, and improved efficiency in field welding with the new Big Blue 800 Duo Pro SF with FieldPro Smart Feeder.

Heavy-Duty DEUTZ TD2.9 L4 Tier 4 Final Engine

The cleanest, greenest diesel power available. Utilizes Diesel Oxidation Catalyst (DOC) technology to keep the air clean with NO exhaust after treatment maintenance.

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.

Standard Features

All models include digital preset weld meters, automatic idle, 120V block heater, and vandalism lockout (protects control panel and receptacles).

Applications

Construction

Cross Country Pipeline

Fabrication

Field Maintenance and Repair

Process Piping

Refinery

Petrochemical

Power

PROCESSES

MIG (GMAW)

Pulsed MIG (GMAW-P) *See spec sheet

TIG (GTAW) DC

Stick (SMAW)

Flux Cored (FCAW)

Air Carbon Arc Cutting and Gouging (CAC-A)

RMD®

Submerged Arc (SAW)

Stud Welding

For more multipurpose welding engines please check out these other fine products

Input Power	Diesel Fuel
Rated Output	Stick/TIG: Separate (Dual Outputs): 400A at 36V, 100% Duty Cycle Paralleled (Combined): 700A at 44V, 100% Duty Cycle 800A at 38V, 100% Duty Cycle MIG/FCAW: Separate (Dual Outputs): 400A at 34V, 100% Duty Cycle Paralleled (Combined): 750A at 40V, 100% Duty Cycle 800A at 38V, 100% Duty Cycle
Welding Amperage Range	Single Weld Mode: CC: 40-800A, CV: 14-40V Dual Weld Mode: CC: 20-400A, CV: 14-40V
Net Weight	Big Blue 800 Duo Pro: 1869 lb. (847.8 kg) Big Blue 800 Duo Pro SF: 1930 lb. (875.4 kg)
Generator Power 104DegF	3-Phase: 27,000 watts peak power, 20,000 watts continuous 1-Phase: 15,000 watts peak power, 12,000 watts continuous
MaxOpenCircuitVoltage	85 VDC (15 VDC when VRD is active)
Engine	4-Cylinder, Liquid-Cooled Industrial DEUTZ TD2.9 L4, 65.7 HP, 1350-1800 RPM, EPA Tier 4 Final Compliant Turbo-Charged Diesel.
Fuel Capacity & Fuel Type	Fuel: 25 gal. (95 L) Oil: 8.5 qt. (8 L) Coolant: 16 qt. (15.2 L)
Dimensions	H: 47 in. (1194 mm) / 55 in. (1397 mm) to top of exhaust W: 28.5 in. (724 mm) D: 69.5 in. (1765 mm)
Sound Level	Idle: 71.3 dB (96.1 Lwa), 75.3 dB at one meter from front panel Weld (800A Load): 78.8 dB (103.7 Lwa), 82.8 dB at one meter from front panel