.ClaRa.Components.VolumesValvesFittings.Valves.ThreeWayValveGas_L1.PressureLoss .ClaRa.Components.VolumesValvesFittings.Valves.ThreeWayValveGas_L1.PressureLossmodel PressureLoss = ClaRa.Components.VolumesValvesFittings.Valves.Fundamentals.QuadraticFrictionFlowAreaSymetric_TWV;