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Miller Elecgtric Mfg. Co. has added a new Caterpillar Turbocharged C1.5T diesel engine as an option to its Big Blue 350 PipePro engine-driven welder/AC generator. The new engine is a liquid-cooled, 3-cylinder, EPA Tier 4 Interim model that offers greater altitude compensation than other machines — critical for transmission pipeline welders who regularly work in high-altitude environments. At 24.7 horsepower and 1,800 rpm, the new engine is extremely quiet and fuel efficient, saving operators as much as 50 percent in fuel use (compared to older models at 3,600 rpm). The Big Blue 350 PipePro, which has qualified on tough welding procedures on several transmission pipeline projects throughout North America, provides 20 to 400 amps for both DC Stick (325 amps at 100 percent duty cycle) and DC TIG welding, 14 to 40 volts for MIG and Flux-Cored welding (350 amps at 100 percent duty cycle) and 12,000 watt peak/10,000 watts continuous auxiliary generator power for running tools on-site.