The differential pressure is smaller/equal to pw

In the following cases, the differential pressure is smaller than/equal to the differential pressure at the restriction!

This message appears with flow regulators if the differential pressure is smaller across the entire valve than the required pressure drop across the restriction.

The required pressure drop across the restriction, the differential pressure at the restriction dpr, is indicated on the Valve data part 1 tab for the self-operated regulators.

The regulator type for self-operated regulators is indicated on the Header tab in the Actuator type field.