... with single fan, double fan, triple fan and fourfold fan, heat exchange surface is from 2 ... 11.Heat-exchanging coiled pipes are highly efficient,clean and dry.12.Punched holes of almium ... After tube expansion, they are connected closely, and thus ensure high efficiency of heat exchange.13. ... -sprayed treatment,the shell is anti-corrosive and endurable.15.For special-purpose products, please contact ...