Description Overview Single pass immersion type firetube boiler Model 475hp-sh-ln390 Rated for 150 psi steam pressure Unit designed for natural gas service 19,976,000 input btu 15,901,000 btu out Approximately 16,000# steam/hr Unit has asme code number 10618 and nb# 8637 Condition Unit is in excellent condition Included Includes 25 hp electric burner, 460v Includes spare burner assembly