轴流式多级降压抗气蚀调节阀.ppt

LINCOLNLOG轴流式多级降压抗气蚀调节阀,调节阀节流原理,气蚀现象及危害,P1,P2,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,Pv,StaticPressure,Cavitation,P1,P2,SubCritical,LincolnLog抗气蚀解决方案,逐级降压最后一级压差最小,400PSI,200PSI,100PSI,LincolnLog流体压降分布演示,LincolnLog独特行程缓冲区设计保护密封面,%RatedCv,%Travel,LincolnLog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-61,LincolnLog抗堵塞解决方案,8”,0.8”,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,&6stageSpecialmorestages阀体材质:Carbonsteel,stainlesssteel&alloy铸造/锻造:Forgedandcasting密封级别:ANSIclassV,&VI连接方式:WeldedRFFlangeRTJFlange,LincolnLog装配与维护,BASE,SEATRING,LINER/CAGE,PLUG,BALANCESEAL,SEALRETAINER,BONNETGASKET,BONNET,METALSEAL,BONNETFLANGE,BODYSTUDS,BODYSTUDNUTS,PACKING,SPACERRING,PACKING,PACKINGFOLLOWER,PACKINGFLANGESTUDS,PACKINGFLANGENUTS,YOKE,DRIVENUT,PACKINGFLANGE,LincolnLog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,BODYSTUDS,BODYSTUDNUTS,PACKING,SPACERRING,PACKING,PACKINGFOLLOWER,PACKINGFLANGESTUDS,PACKINGFLANGENUTS,YOKE,DRIVENUT,PACKINGFLANGE,CavitationPreventionTortuousAxialFlowPathPressureDropControlLowTrimVelocitySmoothProcessControlExcellentDynamicStabilityStagesThrottlinginUnisonHeavyPlugGuidingMinimizesVibrationEffects,Thelatestgenerationofpowerplantsbringwiththemalevelofsevereservicenotseeninanypreviousapplications.Traditionalvalvedesignshavenotbeenabletocopewithsuchrigorousservice.Therequiredsolutionisinnovativetechnologyspecificallydesignedtotackletheseapplications.Masoneilansspecialdesignsforsevereliquidandsteamconditioningapplicationshavebeendesignedtoprovidesuperiorperformanceundertheseextremeconditions.Masoneilancontrolvalvesarebackedby123yearsofspecialtycontrolvalveapplication,engineeringandmanufacturingexpertise.Masoneilaniscommittedtoprovidingtheoptimumsolutionforthemostsevereoftodayscontrolvalveapplications.,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),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/FCIClassVorVIShut-offintegritymustbemaintainedtopreventtrimdamagewhenthevalveisclosed.主密封面应在高压端,以远离可能发生冲蚀的区域CriticalareasmustbeatthefirstpressuredropstagetopreventanycavitationdamagewheninoperationNoflowshouldbeallowedthroughthevalvewhentheplugisclosetotheseat,BoilerFeedpumpRecirc.: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,RefiningIndustryGlycolDehydratorLetdownGasTreaterLetdownChargePumpRecirculationHydrotreatingSamplingColdSeparator,HC&SourWaterLetdownPumpRecirculation(DirtyServices),LincolnLogApplications,Oi