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Iivalve zebhabhathane zikhaphukhaphu, zincinci, kwaye zikhaphukhaphu kunezinye iindidi zeevalvu zolawulo, zizenza zibe lolona khetho lulungileyo lokulawula ukuhamba kwezicelo ezininzi. Iivalvu zebhabhathane eziqhelekileyo ngokwesiko zisetyenziselwa ukuvula / ukuvala izicelo ezizenzekelayo, kwaye zifanelekile kule ndima. Nangona kunjalo, xa kufikwa kulawulo lokuhamba kwindlela evaliweyo, ezinye iinjineli zizibona zingamkelekanga.
Ivalve yebhabhathane isebenzisa idiski ejikelezayo ukulawula ukuhamba kombhobho. Iidiski zidla ngokuqhutywa ngee-degrees ezingama-90, ngoko ngamanye amaxesha zibizwa ngokuba ziivalvu zekota. Ngokuqhelekileyo, zisetyenziswa xa kuqwalaselwa uqoqosho. Xa kufuneka kuvalwe ngokungqongqo, iivalve zebhabhathane ezinamatywina athambileyo kunye/okanye iidiski ezigqunyiweyo zingasetyenziselwa ukunika ukusebenza okufunekayo. Ivalve yebhabhathane yokusebenza ephezulu (HPBV)-okanye ivalve ephindwe kabini-ngoku inqanaba leshishini leevalvu zokulawula ibhabhathane kwaye isetyenziswa ngokubanzi kulawulo lwe-throttling. Zisebenza kakuhle kwizicelo ezinoxinzelelo olungagungqiyo lwehla okanye inkqubo ecothayo iluphu.
Iinzuzo ze-HPBV ziquka indlela yokuhamba ngokuthe tye, umthamo ophezulu, kunye nokukwazi ukudlula ngokulula imidiya eqinileyo kunye ne-viscous. Iindleko zabo zokufakela zidla ngokuba zezona ziphantsi kuzo zonke iintlobo zevalve, ngakumbi i-NPS 12 kunye neevalvu ezinkulu. Xa kuthelekiswa nezinye iintlobo zeevalvu, inzuzo yazo yeendleko iyanda kakhulu xa ubungakanani budlula i-intshi ezili-12.
Banokubonelela ngokuvala ukusebenza kakuhle kuluhlu olubanzi lobushushu, kwaye babonelele ngoyilo lomzimba wevalve eyahlukileyo, kubandakanya uhlobo lwewafer, uhlobo lwelug kunye neflange ephindwe kabini. Zikhaphukhaphu kakhulu kunezinye iintlobo zeevalvu kwaye zixinene. Ngokomzekelo, i-12-intshi ye-ANSI Class 150 i-valve yebhola ephindwe kabini ye-flange inobunzima obungama-350 eeponti kwaye inobuso ngobuso obuyi-intshi ze-13.31, ngelixa i-12-intshi i-lug butterfly valve inobunzima obungama-200 kuphela kunye nobuso-to- ubuso obuyi-intshi ezi-3.
Iivalvu zebhabhathane zinemida ethile ezenza zingalulungeli ulawulo lokuhamba kwizicelo ezithile. Ezi ziquka ukunqongophala koxinzelelo lwamandla xa kuthelekiswa neevalve zebhola, kunye ne-cavitation enkulu okanye ukukhanya okukhanyayo.
Ngenxa yokuba indawo enkulu yendawo ye-disc isebenza njenge-lever yokusebenzisa amandla ashukumisayo e-flowing medium ukuya kwi-drive shaft, i-valve ye-butterfly eqhelekileyo ayisoloko isetyenziselwa ukusetyenziswa koxinzelelo oluphezulu. Ukuba kunjalo, ubungakanani kunye nokukhethwa kwe-actuator kuba yinto ebalulekileyo.
Ngamanye amaxesha kwenzeka ukuba i-valve yokulawula i-butterfly igqithise kakhulu, eya kuba nefuthe elibi ekusebenzeni kwenkqubo. Oku kunokubangelwa kukusetyenziswa kweevalvu ezinobungakanani bombhobho, ingakumbi iivalvu zebhabhathane ezinomthamo omkhulu. Inokunyusa ukuguquguquka kwenkqubo ngeendlela ezimbini. Okokuqala, ukugqithisa kuzisa inzuzo eninzi kakhulu kwivalve, kwaye ngenxa yoko ayinakho ukuguquguquka ekulungiseni umlawuli. Okwesibini, iivalve ezinkulu zinokusebenza rhoqo kwiindawo ezivulekayo ezisezantsi, ngelixa ukukhuhlana kweevalvu zebhabhathane kunokuba kukhulu. Ngenxa yokuba ivalve yokunyuswa kwestroke enikiweyo, ivalve enkulu ngokugqithisileyo iya kuvelisa utshintsho olukhulu lokuhamba ngokulinganayo. Lo mcimbi uya kubaxa kakhulu ukuguquguquka kwenkqubo ehambelana nendawo efileyo ngenxa yengxabano.
Abaseta beekhowudi ngamanye amaxesha basebenzisa iivalve zebhabhathane ngenxa yezizathu zoqoqosho okanye ukuziqhelanisa nobungakanani bombhobho obunikiweyo, kungakhathaliseki ukulinganiselwa kwabo. Kukho umkhwa wokugqithisa i-valve ye-butterfly ukuphepha ukucudisa umbhobho, oku kunokukhokelela ekulawuleni inkqubo embi.
Olona thintelo lukhulu kukuba uluhlu olufanelekileyo lokulawula ukuthontsiza alukho banzi njengevalve yokumisa okanye ivalve yebhola ecandiweyo. Izivalo zebhabhathane aziqhubi kakuhle ngaphandle koluhlu lolawulo lokuvula malunga nama-30% ukuya kuma-50%.
Ngokuqhelekileyo, xa i-loop yolawulo isebenza ngendlela ehambelanayo kwaye inzuzo yenkqubo isondele kwi-1, i-loop ilula ukuyilawula. Ngoko ke, inzuzo yenkqubo ye-1.0 iba yinjongo yokulawula i-loop elungileyo, kwaye uluhlu olwamkelekileyo luyi-0.5 ukuya kwi-2.0 (uluhlu 4: 1).
Ukusebenza kuhle xa uninzi lwenzuzo yelophu luvela kumlawuli. Qaphela ukuba kwi-curve yenzuzo yoMfanekiso 1, inzuzo yenkqubo iba phezulu kakhulu kummandla ongezantsi malunga ne-25% ye-valve stroke.
Inzuzo yenkqubo ichaza ubudlelwane phakathi kwemveliso yenkqubo kunye notshintsho lwegalelo. I-stroke apho ukuzuza kwenkqubo kugcinwa phakathi kwe-0.5 kunye ne-2.0 iyona ndlela yokulawula i-valve. Xa inzuzo yenkqubo ingekho kuluhlu lwe-0.5 ukuya kwi-2.0, ukusebenza kakubi okuguquguqukayo kunye nokungazinzi kwe-loop kunokwenzeka.
Xa ivalve ivaliwe ukuba ivuleke, uyilo lwediskhi yebhabhathane inefuthe elibonakalayo ekuhambeni kwevalve. I-disc eneempawu zepesenti ezilinganayo zinokuhlawula ngcono ukuhla koxinzelelo olutshintshayo kunye nesantya sokuhamba. Iipesenti ezilinganayo zangaphakathi ziya kubonelela ngeempawu zokufakela umgca ukutshintsha ukuhla koxinzelelo, okufanelekileyo. Isiphumo sichaneke ngakumbi inguqu enye ukuya komnye phakathi kwesantya sokuhamba kunye ne-valve stroke.
Kutshanje, iivalve zebhabhathane zinokusebenzisa iidiski ezineempawu zokuqukuqela ezilinganayo zepesenti. Oku kubonelela ngesici sofakelo esibangela ukuba inkqubo yokufakela ifumaneke phakathi koluhlu olufunekayo lwe-0.5 ukuya kwi-2.0 kuluhlu olubanzi lokuhamba. Oku kuya kuphucula kakhulu ulawulo lwe-throttling, ngakumbi kuluhlu olusezantsi lokuhamba.
Olu luyilo lubonelela ngolawulo olulungileyo, kunye nenzuzo eyamkelekileyo ye-0.5 ukuya kwi-2.0 ukusuka kuvula malunga ne-11% ukuya kwi-70%, kwaye uluhlu lolawulo luphantse lube ngokuphindwe kathathu kunolo lwevalve yebhabhathane esebenza ngokuphezulu (HPBV) yobukhulu obufanayo. Ngoko ke, iidiski zeepesenti ezilinganayo zibonelela ngokuhlukahluka kwenkqubo ephantsi.
Iivalvu zebhabhathane ezineempawu zepesenti ezilinganayo, ezinjengeevalve zediski zolawulo, zilungele iinkqubo ezifuna ukusebenza ngokuchanekileyo kokulawula ukuthontsiza. Kungakhathaliseki ukuba yintoni ukuphazamiseka kwenkqubo, inokulawulwa ngokusondeleyo kwindawo ekujoliswe kuyo, ngaloo ndlela inciphisa ukuhluka kwenkqubo.
Ukuba ivalve yebhabhathane ayisebenzi kakuhle, vele ubuyisele ivalve ngobungakanani obufanelekileyo ukusombulula ingxaki. Ngokomzekelo, inkampani yephepha isebenzisa iivalve ezimbini zebhabhathane ezigqithise kakhulu ukulawula ukukhutshwa kokufuma kwi-pulp. Iivalve ezimbini zisebenza ngaphantsi kwe-20% ye-stroke, okubangelwa ukuhluka kwenkqubo ye-3.5% kunye ne-8.0%, ngokulandelanayo. Ubuninzi bobomi babo benkonzo buchithwa kwimodi yezandla.
Kwafakelwa izivalo zebhabhathane ze-NPS 4 ezinobungakanani obufanelekileyo be-Fisher Control-Disk ezinezilawuli zevalvu zedijithali. I-loop ngoku isebenza kwimodi ezenzekelayo, ukuhluka kwenkqubo ye-valve yokuqala kuye kwanda ukusuka kwi-3.5% ukuya kwi-1.6%, kwaye ukuhluka kwenkqubo ye-valve yesibini kuye kwanda ukusuka kwi-8% ukuya kwi-3.0%, ngaphandle kohlengahlengiso olukhethekileyo lwe-loop.
Uxinzelelo lwamanzi olubi kunye nokulawulwa kokuhamba kwenkqubo yokupholisa kwisityalo sentsimbi kubangele ukungahambi kakuhle kwimveliso yokugqibela. I-HPBV efakwe eJiutai ayikwazanga ukulawula ngokufanelekileyo ukuhamba kwamanzi njengoko kufuneka.
Iplanti inethemba lokufaka iivalvu ezinokulawula ngcono inkqubo kwaye ifuna ukunciphisa iindleko zokufakela. Umzi-mveliso uza kuchitha i-10,000 yeedola ukubuyisela imibhobho yesivalo ngasinye ukusuka kwi-HPBV ukuya kwizivalo zebhola ezicandekileyo. Endaweni yoko, u-Emerson ucebisa ukuba ivalve yebhabhathane ye-Control-Disk ilingane ne-HPBV yangoku yobuso ngobuso ubukhulu.
Ivalve yokulawula iDiski yavavanywa kunye nenye yee-HPBV ezilithoba ezikhoyo, kwaye ukusebenza kwayo kwahlangabezana neemfuno ezichaziweyo. Umzi-mveliso wathatha indawo yee-HPBV ezisi-8 eziseleyo kwisithuba sonyaka, kwaye iHPBV nganye yayixhotyiswe ngevalve yokulawula iDiski. Oku kwaphelisa imfuneko yokutshintsha i-90,000 yeedola zemibhobho yeevalvu zebhola ezahluliwe, kwaye iindleko zeevalvu zebhola zonyuke malunga nama-25% xa kuthelekiswa neevalvu zebhabhathane.
Iivalve ze-Control-Disk zibonelela ngolawulo oluchanekileyo kunye nokunceda ukuphelisa ukuhluka kwimveliso yokugqibela. Umzi-mveliso wentsimbi uqikelela ukuba ukufakela iivalvu ze-Control-Diski ezisithoba kunokonga malunga ne-US$1 yesigidi ngonyaka.
Xa kuthelekiswa noninzi lwezinye iindidi zevalvu, iHPBV enendawo yedijithali inexabiso eliphantsi lofakelo lokuqala kwaye inokubonelela ngoluhlu lolawulo olwaneleyo xa ubungakanani bulungile. Banomthamo ophezulu kunye nezithintelo zokuhamba ezincinci. Ivalve yebhabhathane enepesenti elinganayo yendalo yangaphakathi inika ithuba lokwandisa uluhlu lolawulo, olufana nevalve yeglowubhu okanye ivalve yebhola, kwaye ithatha kuphela indawo yeHPBV.
Xa ukhetha iivalve, ngakumbi i-HPBV, qiniseka ukuba zibukhulu obuchanekileyo, kungenjalo zinokulawulwa ngesandla ligumbi lokulawula. Kukwabalulekile ukuqwalasela uhlobo lwevalvu, iimpawu zendalo, kunye nobungakanani bevalve ebonelela ngolona luhlu lubanzi lolawulo lwesicelo.
UMark Nymeyer ngumphathi wonxibelelwano lwentengiso yehlabathi jikelele kulawulo lokuhamba kwi-Emerson Automation Solutions.
Ayilo paywall le. Olu ludonga lwasimahla. Asifuni kukuthintela injongo yakho yokuza apha, ke oku kuyakuthatha imizuzwana embalwa.
Ixesha lokuposa: Oct-11-2021
