轴流式多级降压抗气蚀调节阀

LINCOLNLOG轴流式多级降压抗气蚀调节阀调节阀节流原理汽化压力入口压力正常工况气蚀工况闪蒸工况气蚀现象及危害PvStaticPressureCavitationP1P2气蚀现象及危害•气泡在阀芯和阀体内部爆裂•对阀体和阀内件造成严重侵蚀,阀壁变薄,坑坑洼洼,严重时能打穿阀体•产生很大的噪音•严重缩短了阀门的使用寿命•还会对下游的管线,容器和设备造成潜在的威胁多级降压原理PvStaticPressureCavitationP1P2SubCriticalLincolnLog抗气蚀解决方案•逐级降压•最后一级压差最小400PSI200PSI100PSILincolnLog流体压降分布演示LincolnLog独特行程缓冲区设计—保护密封面02040608010010080604020%RatedCv%TravelLincolnLog紧密密封解决方案基座TFE软阀座保护滑环密封级别:IEC534-4,ANSI,FCI70.2CLASSVCLASSVIMSS-SP-61LincolnLog抗堵塞解决方案8”1”Ø0.1”2”Ø0.2”3”Ø0.3”4”Ø0.4”6”Ø0.6”Ø0.8”LincolnLog生产范围LincolnLog-尺寸:Sizes1-8Inch-形式:Globe&Angle-压力等级:ANSI300#-4500#-流通能力:Cvrangefrom0.8to135-阀芯级数:Standard3,4,&6stage-Specialmorestages-阀体材质:Carbonsteel,-stainlesssteel&-alloy-铸造/锻造:Forgedandcasting-密封级别:ANSIclassV,&VI-连接方式:-Welded-RFFlange-RTJFlangeLincolnLog装配与维护BASESEATRINGLINER/CAGEPLUGBALANCESEALSEALRETAINERBONNETGASKETBONNETMETALSEALBONNETFLANGEBODYSTUDSBODYSTUDNUTSPACKINGSPACERRINGPACKINGPACKINGFOLLOWERPACKINGFLANGESTUDSPACKINGFLANGENUTSYOKEDRIVENUTPACKINGFLANGELincolnLog特点与优点抗气蚀,适用于高压,高压差工况抗堵塞修正线性控制特性,控制曲线平滑密封性能好阀芯自由组合,灵活性高性能可靠快开式阀芯维护方便流开设计平衡式阀芯和非平衡式阀芯BODYSTUDSBODYSTUDNUTSPACKINGSPACERRINGPACKINGPACKINGFOLLOWERPACKINGFLANGESTUDSPACKINGFLANGENUTSYOKEDRIVENUTPACKINGFLANGECavitationPrevention–TortuousAxialFlowPath–PressureDropControl–LowTrimVelocitySmoothProcessControl–ExcellentDynamicStability–StagesThrottlinginUnison–HeavyPlugGuiding–MinimizesVibrationEffectsThelatestgenerationofpowerplantsbringwiththemalevelofsevereservicenotseeninanypreviousapplications.Traditionalvalvedesignshavenotbeenabletocopewithsuchrigorousservice.Therequiredsolutionisinnovativetechnologyspecificallydesignedtotackletheseapplications.Masoneilan’sspecialdesignsforsevereliquidandsteamconditioningapplicationshavebeendesignedtoprovidesuperiorperformanceundertheseextremeconditions.Masoneilancontrolvalvesarebackedby123yearsofspecialtycontrolvalveapplication,engineeringandmanufacturingexpertise.Masoneilaniscommittedtoprovidingtheoptimumsolutionforthemostsevereoftoday’scontrolvalveapplications.LincolnLog应用•电力行业–锅炉给水泵循环(最小流量阀)–锅炉主给水和副给水(启动阀)–过热器和再热器喷水阀–手动高压采样阀–主蒸汽排液阀锅炉给水泵循环(最小流量阀)LPDrumIPHPEconomizerLPEvaporatorHPEconomizerIPEconomizerHP锅炉给水泵循环(最小流量阀)—关键问题•严重的气蚀工况•较大的振动•阀门需要长期关断•由于高关闭压差,容易泄露.•长期使用容易堵塞(焊渣,锈蚀等)•在任何情况下(正常和紧急),都必须为给水泵提供安全保护锅炉给水泵循环(最小流量阀)—对阀门的要求•必须是多级抗气蚀阀芯,以消除气蚀威胁•需要长期紧密关断,密封级别应达到•ANSI/FCIClassVorVI•Shut-offintegritymustbemaintainedtopreventtrimdamagewhenthevalveisclosed.•主密封面应在高压端,以远离可能发生冲蚀的区域Criticalareasmustbeatthefirstpressuredropstagetopreventanycavitationdamagewheninoperation•NoflowshouldbeallowedthroughthevalvewhentheplugisclosetotheseatBoilerFeedpumpRecirc.:Requirements•Valvetrimshouldusewide-openflowpassagestoallowentrainedsolids(pipescale,weldslag,etc.)topass.Drilledholeortortuouspathtechnologyshouldnotbeused.•Flow-to-Open(Flow-Up,UnderthePlug)designsshouldbeusedtoallowthevalvetostillpassflowintheeventofafailuretothestemoractuator.Flow-to-Close(Flow-Down,OverthePlug)designswillcausethevalvetocloseinanemergencyandcausethepumptocavitate.锅炉给水泵循环(最小流量阀)—业绩LincolnLogApplications•RefiningIndustry–GlycolDehydratorLetdown–GasTreaterLetdown–ChargePumpRecirculation–HydrotreatingSampling–ColdSeparator,HC&SourWaterLetdown–PumpRecirculation(DirtyServices)LincolnLogApplications•Oil&GasIndustry–InjectionWellPressureControl–WaterInjectionPumpRecirculation–AmineLetdown–HighPressureSeparatorLetdown–HighPressureNGLPipelineInjection–PumpRecirculation