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Heats thermal fluid, which heats asphalt storage tanks, drum mixers, silos and other components of an HMA plant. High efficiency is achieved by use of a jacketed firebox with heat exchanger. Helical rings in the jacket of the firebox control circulation of thermal fluid in the jacket to eliminate hot spots and ensure optimum heat transfer. Outputs range from 1.2 to 6.3-million Btu/hour.
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