Selectionofcontrolvalves調(diào)節(jié)閥的選擇落版在此調(diào)節(jié)閥的選擇Selectionofcontrolvalves謝聰XieCong主講教師Teacher調(diào)節(jié)閥結構選擇Selectionofcontrolvalvestructure氣開與氣關工作方式選擇Selectionofair-to-openandair-to-closeoperationmodes調(diào)節(jié)閥口徑選擇Selectionofcontrolvalvediameter調(diào)節(jié)閥的選擇Selectionofcontrolvalves調(diào)節(jié)閥Controlvalve系統(tǒng)的穩(wěn)定性Systemstability能耗水平Energyconsumptionlevel安全生產(chǎn)Worksafety調(diào)節(jié)閥的選擇Selectionofcontrolvalves選對了，它能像一位精準的指揮家，讓整個生產(chǎn)流程行云流水。Appropriatecontrolvalvecancreateasmoothandseamlessproductionprocesslikeapreciseconductor.調(diào)節(jié)閥的選擇Selectionofcontrolvalves選錯了，不僅會讓控制效果大打折扣，還可能埋下各種隱患。Inappropriatecontrolvalvenotonlycansignificantlyreducethecontroleffect,butalsomaycausevarioushiddendangers.Selectionofcontrolvalves調(diào)節(jié)閥的選擇氣開與氣關工作方式Air-to-openandair-to-closeoperationmodes調(diào)節(jié)閥口徑Controlvalvediameter調(diào)節(jié)閥結構Controlvalvestructure選用調(diào)節(jié)閥SelectionofcontrolvalvesSelectionofcontrolvalvestructure調(diào)節(jié)閥結構選擇Selectionofcontrolvalvestructure調(diào)節(jié)閥結構選擇通常根據(jù)工藝需要和使用條件：usuallyselectedbasedonprocessrequirementsandoperatingconditions:如介質(zhì)溫度、壓力，介質(zhì)物理、化學特性（如粘度、腐蝕性等），以及對介質(zhì)流量的控制要求等，選擇調(diào)節(jié)閥的結構形式。suchasmediatemperature,pressure,physicalandchemicalpropertiesofmedia(e.g.,viscosity,corrosiveness),andmediumflowcontrolrequirements.Selectionofcontrolvalvestructure調(diào)節(jié)閥結構選擇一般介質(zhì)選用直通單座閥或直通雙座閥Single-seatstraight-throughvalveorstraight-throughdouble-seatvalveisadoptedforgeneralmedia高壓介質(zhì)選用高壓閥High-pressurevalveisadoptedforhigh-pressuremedia強腐蝕介質(zhì)采用隔膜閥diaphragmvalveisadoptedforhighlycorrosivemediaSelectionofcontrolvalvestructure調(diào)節(jié)閥結構選擇Selectionofcontrolvalvestructure調(diào)節(jié)閥結構選擇氣動薄膜單座調(diào)節(jié)閥Pneumaticdiaphragmsingle-seatcontrolvalveSelectionofcontrolvalvestructure調(diào)節(jié)閥結構選擇氣動薄膜單座調(diào)節(jié)閥Pneumaticdiaphragmsingle-seatcontrolvalve氣動薄膜雙座調(diào)節(jié)閥Pneumaticdiaphragmdouble-seatcontrolvalveSelectionofcontrolvalvestructure調(diào)節(jié)閥結構選擇氣動薄膜單座調(diào)節(jié)閥Pneumaticdiaphragmsingle-seatcontrolvalve氣動薄膜雙座調(diào)節(jié)閥Pneumaticdiaphragmdouble-seatcontrolvalve氣動薄膜套筒調(diào)節(jié)閥PneumaticdiaphragmsleevecontrolvalveSelectionofcontrolvalvestructure調(diào)節(jié)閥結構選擇結構特點Structuralfeature只有一個閥芯和閥座，在小流量、高壓力的工況下，控制精度比較高，受不平衡力影響相對大些。Ithasonlyonevalveplugandseat,sothecontrolaccuracyisrelativelyhighbutitismoreaffectedbyunbalancedforcesunderlow-flowandhigh-pressureconditions.氣動薄膜單座調(diào)節(jié)閥Pneumaticdiaphragmsingle-seatcontrolvalve氣動薄膜雙座調(diào)節(jié)閥Pneumaticdiaphragmdouble-seatcontrolvalve氣動薄膜套筒調(diào)節(jié)閥Pneumaticdiaphragmsleevecontrolvalve適合對泄漏量要求嚴格、流量不大的場合常用ItissuitableforapplicationswithstrictleakagecontrolrequirementsandlowflowSelectionofcontrolvalvestructure調(diào)節(jié)閥結構選擇結構特點Structuralfeature只有一個閥芯和閥座，在小流量、高壓力的工況下，控制精度比較高，受不平衡力影響相對大些。Ithasonlyonevalveplugandseat,sothecontrolaccuracyisrelativelyhighbutitismoreaffectedbyunbalancedforcesunderlow-flowandhigh-pressureconditions.氣動薄膜單座調(diào)節(jié)閥Pneumaticdiaphragmsingle-seatcontrolvalve氣動薄膜雙座調(diào)節(jié)閥Pneumaticdiaphragmdouble-seatcontrolvalve氣動薄膜套筒調(diào)節(jié)閥Pneumaticdiaphragmsleevecontrolvalve適合對泄漏量要求嚴格、流量不大的場合常用Itissuitableforapplicationswithstrictleakagecontrolrequirementsandlowflow結構特點Structuralfeature有兩個閥芯和閥座，因為流體作用在兩個閥芯上的力，方向相反能部分抵消，所以不平衡力小。Ithastwovalveplugsandseats,sofluidforcesontwoplugsinoppositedirectioncancounteracteachother,resultinginsmallerunbalancedforces.適合大流量、壓力中等的場合ItissuitableforapplicationswithhighflowandmediumpressureSelectionofcontrolvalvestructure調(diào)節(jié)閥結構選擇氣動薄膜雙座調(diào)節(jié)閥Pneumaticdiaphragmdouble-seatcontrolvalve氣動薄膜套筒調(diào)節(jié)閥Pneumaticdiaphragmsleevecontrolvalve結構特點Structuralfeature有兩個閥芯和閥座，因為流體作用在兩個閥芯上的力，方向相反能部分抵消，所以不平衡力小。Ithastwovalveplugsandseats,sofluidforcesontwoplugsinoppositedirectioncancounteracteachother,resultinginsmallerunbalancedforces.適合大流量、壓力中等的場合Itissuitableforapplicationswithhighflowandmediumpressure結構特點Structuralfeature閥芯套在套筒里，通過改變套筒窗口形狀和大小來調(diào)節(jié)流量。穩(wěn)定性好，振動小，有效降低噪音。Thevalveplugisfittedinsidethesleeve,andflowisadjustedbychangingtheshapeandsizeofthesleevewindow.Itfeaturesexcellentstability,minimalvibration,andeffectivenoisereduction.適合對平穩(wěn)性、降噪有要求，比如流量變化大、易產(chǎn)生振蕩的工況。Itissuitableforapplicationswithstabilityandnoisereductionrequirements,suchashighlyvariablefloworoscillation-proneconditions.Selectionofcontrolvalvestructure調(diào)節(jié)閥結構選擇氣動薄膜隔膜閥Diaphragmvalveofpneumaticdiaphragm氣動薄膜精小型調(diào)節(jié)閥Compactcontrolvalveofpneumaticdiaphragm氣動薄膜三通調(diào)節(jié)閥Three-waycontrolvalveofpneumaticdiaphragmSelectionofcontrolvalvestructure調(diào)節(jié)閥結構選擇氣動薄膜隔膜閥Diaphragmvalveofpneumaticdiaphragm氣動薄膜精小型調(diào)節(jié)閥Compactcontrolvalveofpneumaticdiaphragm氣動薄膜三通調(diào)節(jié)閥Three-waycontrolvalveofpneumaticdiaphragm“隔膜”“Diaphragm”關鍵Key耐腐蝕隔膜Corrosion-resistantdiaphragm適用介質(zhì)：強酸堿等強腐蝕性介質(zhì)Applicablemedia:Strongacids,strongalkalis,andotherhighlycorrosivemedia.Selectionofcontrolvalvestructure調(diào)節(jié)閥結構選擇氣動薄膜隔膜閥Diaphragmvalveofpneumaticdiaphragm氣動薄膜精小型調(diào)節(jié)閥Compactcontrolvalveofpneumaticdiaphragm氣動薄膜三通調(diào)節(jié)閥Three-waycontrolvalveofpneumaticdiaphragm核心作用Corefunction隔離閥體與介質(zhì)、保護閥體Isolatethevalvebodyfromthemedium,protectthevalvebody.實現(xiàn)精準調(diào)節(jié)AchieveprecisecontrolSelectionofcontrolvalvestructure調(diào)節(jié)閥結構選擇氣動薄膜隔膜閥Diaphragmvalveofpneumaticdiaphragm氣動薄膜精小型調(diào)節(jié)閥Compactcontrolvalveofpneumaticdiaphragm氣動薄膜三通調(diào)節(jié)閥Three-waycontrolvalveofpneumaticdiaphragm化工強腐蝕場景Highlycorrosivechemicalscenarios應用場景Applicationscenario“保命閥”“safetyvalve”定位RoleSelectionofcontrolvalvestructure調(diào)節(jié)閥結構選擇氣動薄膜隔膜閥Diaphragmvalveofpneumaticdiaphragm氣動薄膜精小型調(diào)節(jié)閥Compactcontrolvalveofpneumaticdiaphragm氣動薄膜三通調(diào)節(jié)閥Three-waycontrolvalveofpneumaticdiaphragm化工強腐蝕場景Highlycorrosivechemicalscenarios應用場景Applicationscenario“保命閥”“safetyvalve”定位Role特點：體積小巧、控制精度高Features:Compactsize,highcontrolprecision核心優(yōu)勢：適配安裝空間小的場景、節(jié)省空間、保證精準控流Coreadvantage:Itissuitableforscenarioswithlimitedinstallationspace,soitcansavespaceandensurepreciseflowcontrol.適用領域：輕工業(yè)、小型設備Applicablefields:Lightindustry,smallequipment定位：“空間俠”Role:“spacesaver”Selectionofcontrolvalvestructure調(diào)節(jié)閥結構選擇氣動薄膜精小型調(diào)節(jié)閥Compactcontrolvalveofpneumaticdiaphragm氣動薄膜三通調(diào)節(jié)閥Three-waycontrolvalveofpneumaticdiaphragm特點：體積小巧、控制精度高Features:Compactsize,highcontrolprecision核心優(yōu)勢：適配安裝空間小的場景、節(jié)省空間、保證精準控流Coreadvantage:Itissuitableforscenarioswithlimitedinstallationspace,soitcansavespaceandensurepreciseflowcontrol.適用領域：輕工業(yè)、小型設備Applicablefields:Lightindustry,smallequipment定位：“空間俠”Role:“spacesaver”特點：具備三個接口Features:Withthreeinterfaces核心功能：實現(xiàn)介質(zhì)合流Corefunction:Achievemediaconvergence如冷熱流體混合調(diào)溫、單路流體分兩路suchasmixinghotandcoldfluidsfortemperatureadjustment,orsplittingasinglefluidintotwostreamsSelectionofcontrolvalvestructure調(diào)節(jié)閥結構選擇突出優(yōu)勢：一閥多用Keyadvantage:multi-purposevalve適用場景：供熱系統(tǒng)、流體配比系統(tǒng)Applicablescenarios:Heatingsystems,fluidproportioningsystem定位：“分流合流小管家”Role:“diversionandconvergenceassistant”氣動薄膜三通調(diào)節(jié)閥Three-waycontrolvalveofpneumaticdiaphragmSelectionofcontrolvalvestructure調(diào)節(jié)閥結構選擇氣動球閥Pneumaticballvalve氣動蝶閥PneumaticbutterflyvalveSelectionofcontrolvalvestructure調(diào)節(jié)閥結構選擇V型V-type閥芯為V型開口ValveplugfeaturesaV-shapedopening氣動球閥Pneumaticballvalve調(diào)節(jié)特點：如“精準手術刀”，可精細切割流量。Controlcharacteristics:Fineflowcontrollikea“precisescalpel”.適配介質(zhì)場景：含顆粒（如紙漿、纖維）、易結晶介質(zhì)的場合Applicablemediascenarios:Scenarioswithparticulates(e.g.,pulp,fiber)orcrystallizablemedia氣動蝶閥Pneumaticbutterflyvalve核心優(yōu)勢：流量切割干凈、不易堵塞Coreadvantage:Fineflowcontrolwithlowblockagerisk應用場景：化工流程、造紙流程Applicationscenarios:Chemicalprocesses,papermakingprocessesO型O-typeSelectionofcontrolvalvestructure調(diào)節(jié)閥結構選擇V型V-type閥芯為V型開口ValveplugfeaturesaV-shapedopening氣動球閥Pneumaticballvalve調(diào)節(jié)特點：如“精準手術刀”，可精細切割流量。Controlcharacteristics:Fineflowcontrollikea“precisescalpel”.適配介質(zhì)場景：含顆粒（如紙漿、纖維）、易結晶介質(zhì)的場合Applicablemediascenarios:Scenarioswithparticulates(e.g.,pulp,fiber)orcrystallizablemedia氣動蝶閥Pneumaticbutterflyvalve核心優(yōu)勢：流量切割干凈、不易堵塞Coreadvantage:Fineflowcontrolwithlowblockagerisk應用場景：化工流程、造紙流程Applicationscenarios:Chemicalprocesses,papermakingprocessesO型O-type閥芯為O型通孔ValveplugfeaturesanO-shapedthroughhole調(diào)節(jié)特點Controlcharacteristics全開時：流道順暢、流體流通性好Fullyopen:Smoothflowpathwithexcellentfluidity關斷時：密封嚴實、可鎖死泄漏Closed:Tightsealingtopreventleakage適用場景Applicationscenarios快速切斷、流體換向場景、可靠性高Quickshutoff,fluidreversingwithhighreliability法蘭蝶閥FlangedbutterflyyvalveSelectionofcontrolvalvestructure調(diào)節(jié)閥結構選擇氣動球閥Pneumaticballvalve氣動蝶閥PneumaticbutterflyvalveO型O-type閥芯為O型通孔ValveplugfeaturesanO-shapedthroughhole調(diào)節(jié)特點Controlcharacteristics全開時：流道順暢、流體流通性好Fullyopen:Smoothflowpathwithexcellentfluidity關斷時：密封嚴實、可鎖死泄漏Closed:Tightsealingtopreventleakage適用場景Applicationscenarios快速切斷、流體換向場景、可靠性高Quickshutoff,fluidreversingwithhighreliability法蘭蝶閥Flangedbutterflyyvalve連接方式：法蘭連接管道Connectionmode:Flangedpipeconnection特點：結構穩(wěn)當Features:Stablestructure適配條件：大口徑、中低壓流體調(diào)節(jié)Compatibleconditions:Conditionswithlargediameter,medium-lowpressurefluidcontrol適用場景：給排水、通風系統(tǒng)（可掌控大流量）Applicationscenarios:Watersupply/drainage,ventilationsystems(capableofhandlinghighflow)對夾蝶閥WaferbutterflyvalveSelectionofcontrolvalvestructure調(diào)節(jié)閥結構選擇氣動蝶閥Pneumaticbutterflyvalve連接方式：法蘭連接管道Connectionmode:Flangedpipeconnection特點：結構穩(wěn)當Features:Stablestructure適配條件：大口徑、中低壓流體調(diào)節(jié)Compatibleconditions:Conditionswithlargediameter,medium-lowpressurefluidcontrol適用場景：給排水、通風系統(tǒng)（可掌控大流量）Applicationscenarios:Watersupply/drainage,ventilationsystems(capableofhandlinghighflow)對夾蝶閥Waferbutterflyvalve安裝方式：夾在管道間安裝Installationmethod:Itisclampedbetweenpipes特點：小巧、省空間、輕便Features:Compactsize,spacesaving,lightweight適配條件：小口徑、對安裝空間要求高的場合Compatibleconditions:Conditionswithsmalldiameterandlimitedinstallationspace法蘭蝶閥FlangedbutterflyyvalveSelectionofcontrolvalvestructure調(diào)節(jié)閥結構選擇氣動蝶閥Pneumaticbutterflyvalve法蘭蝶閥Flangedbutterflyyvalve核心區(qū)別Keydifferences氣動球閥：精度高、切斷性強Pneumaticballvalve:Highprecision,strongshutoffcapability氣動蝶閥：適配大口徑、更省空間Pneumaticbutterflyvalve:Itissuitableforlargediameters,savingmorespace對夾蝶閥WaferbutterflyvalveSelectionofair-to-openandair-to-closeoperationmodes氣開與氣關工作方式選擇Selectionofair-to-openandair-to-closeoperationmodes氣開與氣關工作方式選擇一般氣動調(diào)節(jié)閥在氣壓信號中斷后閥門會自動復位。Generally,pneumaticcontrolvalvesautomaticallyresetwhentheairpressuresignalisinterrupted.無壓力信號時閥門全開，隨著信號增大，閥門逐漸關小的稱為氣關式；Thevalveisfullyopenifnopressuresignalisgiven,andthevalvewillgraduallyclosesasthesignalincreases.Thistypeofvalveiscalledair-to-closevalve.無壓力信號時閥全閉，隨著信號增大，閥門逐漸開大的稱為氣開式。Thevalveisfullyclosedifnopressuresignalisgiven,andthevalvewillgraduallyopensasthesignalincreases.Thistypeofvalveiscalledair-to-openvalve.Selectionofair-to-openandair-to-closeoperationmodes氣開與氣關工作方式選擇氣動薄膜調(diào)節(jié)閥氣開與氣關方式工作原理Workingprincipleofair-to-openandair-to-closemodesinpneumaticdiaphragmcontrolvalves氣關式Air-to-close氣開式Air-to-open氣開式Air-to-open氣關式Air-to-closeSelectionofair-to-openandair-to-closeoperationmodes氣開與氣關工作方式選擇“斷氣后”，工藝安全需要閥門開還是關。Shouldthevalvebeopenedorclosedforprocesssafety“afterairsupplyisinterrupted”?氣動薄膜調(diào)節(jié)閥氣開與氣關方式工作原理Workingprincipleofair-to-openandair-to-closemodesinpneumaticdiaphragmcontrolvalves氣關式Air-to-close氣開式Air-to-open氣開式Air-to-open氣關式Air-to-close氣開氣關怎么選：Howtochoosebetweenair-to-openmodeandair-to-closemode:Selectionofair-to-openandair-to-closeoperationmodes氣開與氣關工作方式選擇調(diào)節(jié)閥氣開/氣關方式的選擇原則：Selectionprinciplesforair-to-open/air-to-closemodesofcontrolvalves:給水閥Watersupplyvalve蒸汽Steam燃氣閥Gasvalve當控制信號中斷時，閥門的復位位置使生產(chǎn)過程、工藝設備和現(xiàn)場環(huán)境處于安全狀態(tài)。Whenthecontrolsignalisinterrupted,thevalve'sresetpositionshouldkeeptheproductionprocess,equipment,andenvironmentinasafestate.Selectionofair-to-openandair-to-closeoperationmodes氣開與氣關工作方式選擇給水閥Watersupplyvalve蒸汽Steam燃氣閥Gasvalve

例如，在選擇蒸氣鍋爐調(diào)節(jié)閥時，為保證失控狀態(tài)下鍋爐安全：

Forexample,whenselectingcontrolvalvesforsteamboilers,thefollowingcontentsshouldbefollowedtoensuresafetyinout-of-controlstates:給水調(diào)節(jié)閥應選氣關式Thewatersupplycontrolvalveshouldbeair-to-closetype氣壓信號喪失時，供水閥打開，避免鍋爐缺水、過熱。Whentheairpressuresignalislost,thewatersupplyvalveopenstopreventboilerwatershortageandoverheating.Selectionofair-to-openandair-to-closeoperationmodes氣開與氣關工作方式選擇給水閥Watersupplyvalve蒸汽Steam燃氣閥Gasvalve

例如，在選擇蒸氣鍋爐調(diào)節(jié)閥時，為保證失控狀態(tài)下鍋爐安全：

Forexample,whenselectingcontrolvalvesforsteamboilers,thefollowingcontentsshouldbefollowedtoensuresafetyinout-of-controlstates:燃氣調(diào)節(jié)應選氣開式Thegascontrolvalveshouldbeair-to-opentype氣壓信號喪失時，燃氣閥關閉，避免鍋爐干燒、過熱。Whentheairpressuresignalislost,thegasvalveclosestopreventdryheatingandoverheatingoftheboiler.Selectionofair-to-openandair-to-closeoperationmodes氣開與氣關工作方式選擇給水閥Watersupplyvalve蒸汽Steam燃氣閥Gasvalve給水閥、燃氣閥一進一燃，氣關、氣開配合，斷信號時一個補水、一個斷氣，讓鍋爐“冷靜下來”，不炸不燒。Thewatersupplyvalveandgasvalveworkintandem-onesupplieswater,theothercutsoffgas.Withtheair-to-open/air-to-closemode,onereplenisheswaterwhiletheothercutsoffgasinthecaseofsignalfailure,allowingtheboilerto“cooldown”safelywithoutexplosionoroverburning.Selectionofcontrolvalvediameter調(diào)節(jié)閥口徑選擇Selectionofcontrolvalvediameter調(diào)節(jié)閥口徑選擇調(diào)節(jié)閥的口徑?jīng)Q定調(diào)節(jié)閥的流通能力。Thevalvediameterdeterminesitsflowcapacity.調(diào)節(jié)閥的流通能力用流量系數(shù)C值表示。TheflowcapacityofacontrolvalveisexpressedbytheflowcoefficientCvalue.Selectionofcontrolvalvediameter調(diào)節(jié)閥口徑選擇流量系數(shù)C的定義：DefinitionofflowcoefficientC:在調(diào)節(jié)閥兩端壓為100kPa，流體為水（密度為1000kg/m3）的條件下，閥門全開時每小時流過調(diào)節(jié)閥的體積流量（m3/h）。Volumetricflow(m3/h)perhourthroughafullyopencontrolvalvewhenthepressureatbothendsofthecontrolvalveis100kPaandthefluidiswater(density1000kg/m3).CDgSelectionofcontrolvalvediameter調(diào)節(jié)閥口徑選擇流量系數(shù)C的定義：DefinitionofflowcoefficientC:例如：某一調(diào)節(jié)閥全開、閥門兩端壓為100kPa時，流過閥門的水流量為20m3/h，則調(diào)節(jié)閥的流量系數(shù)為：C=20。Forexample,whenacontrolvalveisfullyopenwitha100kPapressureatbothendsofthecontrolvalve,thewaterflowis20m3/h,thentheflowcoefficientofthevalveis:C=20.CDgSelectionofcontrolvalvediameter調(diào)節(jié)閥口徑選擇CDg注意Note優(yōu)先選擇標準口徑，確保開度在合理范圍。（直線特性閥10%~80%，等百分比閥30%~90%）Standarddiameterisprioritizedtoensuretheopeningremainswithinareasonablerange.(Linearcharacteristicvalves:10%-80%,equalpercentagevalves:30%-90%)預留余量：避免口徑過小導致流量瓶頸或過大引發(fā)控制精度下降。Reservedmargin:Avoidcausingflowbottlenecksduetoundersizedvalvesorreducingcontrolprecisionduetooversizedvalves.調(diào)節(jié)閥的選擇Sel