Metso has released Nelprof 6 valve sizing software. The new version extends earlier Nelprof versions with two new calculation modules, which enable the selection of intelligent automated onoff valves and emergency valves. Special safety requirements, such as an actuator-sizing safety factor or a complete valve-assembly safety-integrity level, can be evaluated with the new state-of-the-art tools in the program. Features Nelprof, with its advanced control-valve selection features, was first introduced in 1981. Now Nelprof 6 can be used to select all Metsos automated onoff and emergency valves. Performance analysis, which has been one of the value-adding features in the control-valve sizing tool since 1980s, can be used to study valve controllability in a closed control loop. The module also includes multi-phase flow sizing as well as noise and cavitation prediction analysis.