Pset_ValvePHistory Valve performance history common attributes of a typical 2 port pattern type valve. IfcValve IfcValve PercentageOpen The ratio between the amount that the valve is open to the full open position of the valve. Percentage Open パーセント開度 全開時に対する開度量の比率。 MeasuredFlowRate The rate of flow of a fluid measured across the valve. Measured Flow Rate 計測流量 バルブを通過する流体の計測された流量 MeasuredPressureDrop The actual pressure drop in the fluid measured across the valve. Measured Pressure Drop 計測圧力降下 バルブを通過する際の計測された圧力降下 バルブの履歴