轴流式多级降压抗气蚀调节阀(精选PPT)

LINCOLNLOG轴流式多级降压抗气蚀调节阀 1 调节阀节流原理 2 气蚀现象及危害 P1 P2 3 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 4 多级降压原理 Pv StaticPressure Cavitation P1 P2 SubCritical 5 LincolnLog抗气蚀解决方案 逐级降压最后一级压差最小 400PSI 200PSI 100PSI 6 LincolnLog流体压降分布演示 7 LincolnLog独特行程缓冲区设计 保护密封面 RatedCv Travel 8 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 9 LincolnLog抗堵塞解决方案 8 0 8 10 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 11 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 12 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 13 Thelatestgenerationofpowerplantsbringwiththemalevelofsevereservicenotseeninanypreviousapplications Traditionalvalvedesignshavenotbeenabletocopewithsuchrigorousservice Therequiredsolutionisinnovativetechnologyspecificallydesignedtotackletheseapplications Masoneilan sspecialdesignsforsevereliquidandsteamconditioningapplicationshavebeendesignedtoprovidesuperiorperformanceundertheseextremeconditions Masoneilancontrolvalvesarebackedby123yearsofspecialtycontrolvalveapplication engineeringandmanufacturingexpertise Masoneilaniscommittedtoprovidingtheoptimumsolutionforthemostsevereoftoday scontrolvalveapplications 14 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 15 锅炉给水泵循环 最小流量阀 16 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 17 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 18 BoilerFeedpumpRecirc Requirements Valvetrimshouldusewide openflowpassagestoallowentrainedsolids pipescale weldslag etc topass Drilledholeortortuouspathtechnologyshouldnotbeused Flow to Open Flow Up UnderthePlug designsshouldbeusedtoallowthevalvetostillpassflowintheeventofafailuretothestemoractuator Flow to Close Flow Down OverthePlug designswillcausethevalvetocloseinanemergencyandcausethepumptocavitate 19 锅炉给水泵循环 最小流量阀 业绩 20 LincolnLogApplications RefiningIndustryGlycolDehydratorLetdownGasTreaterLetdownChargePumpRecirculationHydrotreatingSamplingColdSeparator HC SourWaterLetdownPumpRecirculation DirtyServices 21 LincolnLogApplications Oi