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1、D661SeriesISO4401Size05InstallationandOperationInstructionServoandProportionalControlValveswithIntegratedElectronics1.INTRODUCTIONThismanualprovidesinstructionsandproceduresnecessarytoinstall,operateandtroubleshoottheMoogD661SeriesServoandPropor-tionalControlValves.SeriesModelsSeriesGServovalvewith
2、nozzle-flapperorServoJet®pilotstage,spoolinbushing,withoutadditionalmechanicalfeedbackSeriesSServovalveconfiguredlikeversionG,butwithadditionalmechanicalfeedbackSeriesHServovalveconfiguredlikeversionS,butwithimprovedperformance(highresponse)SeriesP...A/BProportionalvalvewithServoJet®pilotstage,spoo
3、linbody,withoutadditionalmechanicalfeedbackSeriesP...F/GProportionalvalveconfiguredlikeversionP...A/B,butwithnozzleflapperpilotstageandadditionalmechanicalfeedback2.OPERATIONGeneralTheServovalvesD661-G,SandHSeriesandtheProportionalFlowELECTROHYDRAULICVALVECUT-AWAYControlValvesD661-PSeriesarethrottl
4、evalvesfor2-,3-and4-wayapplications.Withproportionalflowcontrolvalves,5-wayapplicationsarealsopossible.Thesevalvesaresuitableforelectrohydraulicposition,velocitiy,ScrewPlugforNullAdjustpressureorforcecontrolsystemswithhighdynamicresponserequirements.ConnectorBushingD661-G,SandHThespoolofthemainstag
5、eisdrivenbyanozzleflapperorServoJet®pilotstage,optionalwithorwithoutadditionalmechanicalfeedback(nozzleSpoolflapperonly).WithversionsD661-SandHincaseofanelectricalsupplyfailurethespoolismovedintoapreferredpositionbyactionofanadditionalmechanicalfeedback.CAUTIONXTAPBTYDISASSEMBLY,MAINTENANCE,ORREPAI
6、ROTHERTHANINACCORDANCEWITHTHE2INSTRUCTIONSHEREINOROTHERSPECIFICWRITTENDIRECTIONSFROMMOOGWILLINVALIDATEMOOG’SOBLIGATIONSUNDERITSWARRANTY.Figure1MoogSeriesD661-GSeries,withoutadditionalmechanicalfeedbackOperatingPrincipleoftheTwo-StageValveThepositiontransducerwhichisexcitedviaanoscillatormeasuresthe
7、Anelectricinputsignal(flowratecommand)isappliedtotheintegratedpositionofthespool(actualvalue,positionvoltage).Thissignalisthencontrolamplifierwhichdrivesacurrentthroughthecoilsofthepilotstagedemodulatedandf
