Port 2: InletPort 1: Reduced PressurePort 3:DrainAdjustment ScrewPilot SpringPilot SeatPilot PoppetBias SpringPistonPilot OrificeBias SpringPistonPilot SpringPilot PoppetPilot Drain ValvePort 2: InletPort 1: Reduced PressurePort 3: DrainPort 2: InletPort 1: Reduced PressurePort 3: DrainPilot OrificePilot Drain ValvePilot Drain ValveDamping OrificeAdjustment ScrewnumSpring Setting:numPressure:Detailed Schematic SymbolSimplified Schematic SymbolnumPressure:Low PressureHigh PressureVacuum PressureDrain PressureColors LegendMedium Pressure