... % and 85% according to the difference of boiler type.FuelCoal, water gas, city gas, mixed gas, light oil, heavy oil, residual oil, mixed ... atomization system, steam atomization system, air atomization system.Gas-firedFuel gas filter, pressure switch, Gas pressure regulator, leak detection pump, solenoid valve. ... high temperature heat source below 350°C. horizontal oil fuel (gas) heating furnace