China Deyuan Marine Fitting Co.,ltd .EGE-series exhaust-gas economizer usually is jointly used with oil-fired boiler ... the steam needed will be produced here. Without cylindrical boiler shell, the water pipe is also the heat-transferring surface, therefore ... , compared with natural circulation EGB-series exhaust-gas boiler, EGE-series exhaust-gas economizer is lighter, smaller and more economical when ...