Convenient steam cleaning and washing of interior parts is accomplished by quick disassembly of one set of bolts.The units are designed for optimum distribution of heat transfer surface for high vapor flow rates. Design, stress relief and overall construction is in accord with the standards of the Chlorine Institute.Low liquid chlorine hold up volume provides quick response to changes in vapor demand. Construction provides ease in servicing and promotes high superheat to prevent condensation and corrosion in the vaporizer and piping.