Tube Bundle Heat Exchanger Our leading expertise in this field has made us the foremost manufacturers of Tube Bundle Heat Exchangers. These heat exchangers offered by us are non-corrosive, energy efficient, sturdy construction, light weight, smooth functioning, and has high temperature tolerance ability. The U tubes used in the exchanger are simple, high-finned (integral or applied fin) or low-finned (internal and/or external). We also provide several methods for the tube side/shell side enhancement.