1. establish from the pump data what NPSHr in required at the design point of the pumping system.
2. calculate the NPSHa what is available from the system at the design point of the system.
3. compare the 2 sets of figures.
4. NPSHa should be in excess of NPSHr
There are numerous publications, web-sites etc that can assist with this information.
Naresuan University
Phitsanulok
Thailand