... heat from the media, which goes back to the boiler after heat exchange. So it is an organic heat ... between 60% and 85% according to the difference of boiler type.FuelCoal, water gas, city gas, mixed gas, ... regulator, leak detection pump, solenoid valve.Application of thermal oil industrial heating boiler:Chemical: polymerization, condensation, distillation, concentration, evaporation, fusionFat: ...