Many modified versions of the venturi, often referred to as flow tubes, have been developed in recent years. These designs normally do not offer any significant improvement over the standard ASME type venturi except for somewhat higher pressure recovery . Where minimum pressure loss is of concern. Energy Flow Model II low loss Venturi should be considered. The Model II utilizes the classic ASME venturi design with a modified (truncated) exit cone to provide the highest pressure recovery consistent with a time proven design and established flow coefficient data.
