Cannot find signal pressure range for this actuator, nominal size and diaphragm surface

Cannot find signal pressure range for this actuator, nominal size and diaphragm area.

This message appears when the program does not find a signal pressure range in the database during calculation of a SAMSON actuator type for the combination of the selected nominal travel of the valve (Valve data part 1) and the selected actuator type and the selected diaphragm area.

In this case, further calculation is carried out as for a non-SAMSON type (see Calculate actuator).