.AixLib.Fluid.Actuators.Valves.ExpansionValves.Examples.ModularExpansionValvesPressureDifference.Medium .AixLib.Fluid.Actuators.Valves.ExpansionValves.Examples.ModularExpansionValvesPressureDifference.Mediumpackage Medium = Modelica.Media.R134a.R134a_ph;