Description

The Miller Big Blue® 450 Duo CST™ diesel welder/generator delivers reliable dual-operator capability and exceptional arc performance for industrial multi-operator welding applications. Powered by a 24.7 hp Mitsubishi S4L2 Tier 4 Final diesel engine, this welder supports Stick, DC TIG, and Air Carbon Arc Cutting and Gouging processes.

Each power source provides 400A at 100% duty cycle for single-operator use or 200A per operator at 100% duty cycle for dual-operator use. With a 13.5-hour runtime at 50% load and a quiet operation of 71 dBA at 23 feet, it is ideal for jobsites that require both power and efficiency.

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Processes

Stick (SMAW)
DC TIG (GTAW) Lift-Arc™
Air carbon arc (CAC-A) – Rated: 3/16-inch (4.8 mm) carbons (paralleled)
Air plasma cutting and gouging with optional Spectrum® models

Highlights

Dual-Operator Capability:
Allows two welders to operate independently with full control, providing up to 200 amps per operator at 100% duty cycle.
Fuel Efficiency:
Delivers a 13.5-hour runtime on a 13-gallon tank at 50% load, reducing refueling downtime and operational costs.
Quiet Operation:
Operates at 71 dBA at 23 feet, quieter than many single-operator models, improving jobsite communication and reducing noise hazards.
Adaptive Hot Start™:
Prevents electrode sticking by automatically increasing amperage during arc starts for smoother operation.
Auxiliary Power Output:
Provides 4,000 watts (120/240V) of continuous single-phase power for jobsite tools and lights.
Heavy-Duty Mitsubishi Engine:
Designed to run 10,000 hours before major overhaul, ensuring long-term durability and reliability.
Vandalism Lockout Kit:
Lockable hinged steel panel protects front controls and ignition switch for added security.

What’s Included

Not included: Weld leads

Industries

Benefits of the Miller Big Blue® 450 Duo CST™

Enhanced Productivity: Dual-operator capability allows two welders to work simultaneously, doubling efficiency on the job site.
Superior Arc Performance: Adaptive Hot Start™ ensures consistent arc starts on difficult electrodes like E6010.
Versatility: Supports Stick, TIG, and air carbon arc gouging processes for a wide range of applications.
Energy Efficiency: Reduced fuel consumption lowers operating costs and increases runtime.
Durability: Mitsubishi engine delivers long-term performance with minimal maintenance.
Jobsite Safety: Quiet operation improves communication and reduces noise hazards.

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Big Blue 450 Duo CST (Mitsubishi) #907477