Low PressureHigh PressureVacuum PressureDrain PressureColors LegendMedium PressureQminQmaxCounterbalanceValveJackCylinderJackCylinderPressCylinderSequenceValvePilot OrificeDirectionalControl ValvePumpTankTankCurrent Stage:EndAvailable Volume (Va):GalPressure (P):PSIContained Volume (Vc):Gal