flow condition

Cavitation noise

indicates non critical cavitation and is shown if the differential pressure ratio (xF) exceeds the cavitation index xFz (in previous versions the xFz value was called zy)

Cavitation

General indication of cavitation, used for self-operated regulators

Critical Cavitation

indicates cavitation erosion and is shown if the differential pressure (dp)>25 bar and xF>=kc (flow limitation)

Hardening req.

indicates cavitation erosion for standard globe valves. Hardened/stellited seat and plug is recommended. Condition: dp>15 bar and xF>=kc

Flashing

Choked Flow