izinga okusezingeni eliphezulu flange uxhumano butterfly valve

I-CTYPE html OMPHAKATHI "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> Amavalvu ovemvane alula, mancane futhi alula kunezinye izinhlobo zama-valve okulawula, okuwenza abe yisinqumo esingcono kakhulu sokulawula ukugeleza ezinhlelweni eziningi. Ngokwesiko, ama-valve ovemvane ajwayelekile aye asetshenziswa ekuvuleni/avaliwe okuzenzakalelayo futhi aphelele kule ndima.Nokho, abanye onjiniyela bawabheka njengangamukelekile lapho iza ekulawuleni ukugeleza kusistimu ye-loop evaliwe. Amavalvu ovemvane asebenzisa amadiski azungezayo ukuze alawule ukugeleza kwamapayipi.Ama-Disc ngokuvamile asebenza ngamadigri angu-90, ngakho ngezinye izikhathi abizwa ngokuthi ama-engela rotary valves.Ngokuvamile, asetshenziswa uma kucatshangelwa umnotho.Uma kudingeka ukuvala okuqinile, amavalvu evemvane anezigxivizo ezithambile ze-elastomeric. kanye/noma ama-coated discs angasetshenziswa ukunikeza ukusebenza okudingekayo.Ama-Butterfly Valves (HPBV) Asebenza Kakhulu - noma Ama-Double Offset Valves - manje aseyindinganiso yemboni yamavalvu okulawula uvemvane futhi asetshenziswa kakhulu ekulawuleni ukuphonseka.Enza kahle ezisetshenziswa ingcindezi ehlala njalo yehla noma imijikelezo yenqubo ehamba kancane. Izinzuzo ze-HPBV zihlanganisa indlela yokugeleza eqondile, umthamo ophezulu, kanye nekhono lokudlulisa imidiya eqinile ne-viscous kalula.Ngokujwayelekile banezindleko eziphansi ezifakiwe zanoma yiluphi uhlobo lwe-valve, ikakhulukazi ku-NPS 12 nosayizi abakhulu.Inzuzo yabo yezindleko ikhula kakhulu uma kuqhathaniswa nezinye izinhlobo zama-valve ngobukhulu obungaphezu kwamayintshi angu-12. Anikeza ukusebenza okuhle kokuvala phezu kwebanga elibanzi lokushisa futhi atholakala ngemiklamo ehlukene yomzimba ehlanganisa i-wafer, i-lug kanye ne-double flanged.Alula kakhulu ngesisindo futhi aminyene kakhulu kunezinye izinhlobo zamavalvu.Isibonelo, i-ANSI engu-12 intshi I-valve yebhola ehlukaniswe kabili ene-Class 150 inesisindo esingamaphawundi angu-350 futhi inobukhulu bobuso nobuso obungamayintshi angu-13.31, kuyilapho ivalve ye-butterfly engu-12-intshi elingana nesisindo esingamaphawundi angu-200 kuphela futhi inobukhulu obungu-3-intshi bobuso nobuso. Ama-valve e-Butterfly anemikhawulo ethile ewenza angakufanelekeli ukulawula ukugeleza kwezinye izinhlelo zokusebenza.Lokhu kufaka phakathi amandla okwehlisa ingcindezi elinganiselwe uma kuqhathaniswa nama-valve ebhola embulunga anamandla amakhulu e-cavitation noma i-flash evaporation. Ngenxa yokuthi indawo enkulu engaphezulu yediski isebenza njenge-lever, isebenzisa amandla aguquguqukayo we-medium egelezayo ukuya ku-drive shaft, ama-valve ovemvane ajwayelekile awasetshenziselwa izicelo zokucindezela okuphezulu. . Amavalve okulawula uvemvane ngezinye izikhathi angaba mkhulu kakhulu, okungaba nomthelela omubi ekusebenzeni kwenqubo.Lokhu kungase kube ngenxa yokusetshenziswa kwamavalve anosayizi womugqa, ikakhulukazi amavalve ovemvane anamandla amakhulu.Kungakhuphula ukuhlukahluka kwenqubo ngezindlela ezimbili. I-valve izuza kakhulu, ishiya ukuguquguquka okuncane ekulungiseni isilawuli.Okwesibili, i-valve enkulu ingase isebenze kaningi lapho kuvuleka amavalvu aphansi, futhi ukungqubuzana kophawu kungase kube kukhulu ku-valve uvemvane. uma kubhekwa ukwenyuka kokuhamba kwama-valve, lesi sigameko senza ihaba kakhulu ukuhlukahluka kwenqubo okuhlobene ne-deadband ebangelwa ukungqubuzana. Izichazi ngezinye izikhathi zisebenzisa ama-valve ovemvane ukuze ukonga noma ukulingana nosayizi womugqa othile kungakhathaliseki ukulinganiselwa kwawo.Kunomkhuba wokwenza ama-valve ovemvane abe mkhulu ukuze kugwenywe ukumpintsha amapayipi, okungaholela ekulawuleni okungalungile kwenqubo. Umkhawulo omkhulu ukuthi uhla olufanele lokulawula i-throttle alubanzi njenge-valve yebhola noma i-valve yebhola ehlukaniswe izingxenye. Ngokuvamile, iluphu kulula kakhulu ukuyilawula lapho iluphu yokulawula isebenza ngendlela yomugqa futhi inzuzo yenqubo iseduze nobunye.Ngakho-ke, inzuzo yenqubo engu-1.0 iba yithagethi yokulawula iluphu okuhle, ngebanga elamukelekayo lika-0.5 kuya ku-2.0 ( 4:1 ububanzi). Ukusebenza kuhle kakhulu uma iningi lenzuzo yeluphu livela kusilawuli.Qaphela ukuthi kwijika lokuzuza loMdwebo 1, inzuzo yenqubo iba phezulu kakhulu esifundeni esingaphansi kwama-25% ohambo lwamavalvu. Inzuzo yenqubo ichaza ubudlelwano phakathi kokukhishwayo kwenqubo nokushintsha kokufaka.I-stroke lapho inzuzo yenqubo ihlala phakathi kuka-0.5 no-2.0 ububanzi bokulawula obuphelele be-valve.Lapho ukuzuza kwenqubo kungekho ku-0.5 kuya ku-2.0 ububanzi, ukusebenza okuguquguqukayo okubi kanye neluphu ukungazinzi kungenzeka. Idizayini ye-Butterfly disc inomthelela obalulekile ekugelezeni kwe-valve njengoba i-valve isuka ivaliwe iye evulekile.Amadiski anezici zephesenti ezilinganayo angakwazi ukunxephezela kangcono ukwehla kwengcindezi okuhluka ngokugeleza.Ukucushwa kwamaphesenti alinganayo kuzohlinzeka ngezici zokukhweza ezilandelanayo zokwehla kwengcindezi ehlukahlukene, okuyizinto kuyinto enhle.Umphumela uwukuhluka okunembe kakhudlwana, okukodwa kokukodwa phakathi kokugeleza nokuhamba kwevalvu. Amavalvu e-Butterfly asanda kwethula ama-disc anezici zokugeleza kwephesenti elilinganayo.Lokhu kunikeza isici sokufaka esivumela inqubo yokufaka izuze kububanzi obufunwayo obungu-0.5 kuya ku-2.0 phezu kwemivimbo ebanzi.Lokhu kuthuthukisa kakhulu ukulawulwa kwe-throttle, ikakhulukazi ebangeni eliphansi lokuhamba. Lo mklamo unikeza ukulawula okuhle, ngenzuzo eyamukelekayo ye-0.5 kuya ku-2.0, kusukela cishe ku-11% evulekile kuya ku-70%, ukwanda okuphindwe kathathu kobubanzi bokulawula uma kuqhathaniswa ne-valve butterfly (HPBV) evamile yokusebenza okuphezulu kosayizi ofanayo.Ngakho-ke , amaphesenti alinganayo amadiski ahlinzeka ngokuhlukahluka okuphansi kwenqubo yonke. Amavalvu ovemvane anezici zephesenti ezilinganayo, njenge-Control-Disk valve, alungele izinqubo ezidinga ukusebenza okunembile kokulawula ukudonsa.Angakwazi ukulawulwa eduze nendawo ebekiwe kungakhathaliseki ukuphazamiseka kwenqubo, ukunciphisa ukuhlukahluka kwenqubo. Uma i-valve uvemvane ingasebenzi kahle, ukumane uyishintshe nge-valve enosayizi ofanele kuyoxazulula inkinga.Isibonelo, inkampani yephepha isebenzisa ama-valve ovemvane amakhulu kakhulu ukuze ilawule ukukhishwa komswakama ku-pulp.Womabili ama-valve ayesebenza ngaphansi kuka-20% ukuhamba, okuholela ekushintsheni kwenqubo okungu-3.5% no-8.0%, ngokulandelana.Iningi lesikhathi sabo sokuphila sichithwa kumodi yezandla. Kwafakwa amavalvu amabili afanele i-NPS 4 Fisher Control-Disk butterfly anesilawuli se-valve yedijithali. Iluphu manje isebenza ngemodi ezenzakalelayo ngokuhlukahluka kwenqubo kusuka ku-3.5% kuya ku-1.6% kuvalvu yokuqala kanye no-8% kuya ku-3.0% kwivalve yesibili ngaphandle noma yikuphi ukushuna kweluphu okukhethekile. Ukucindezela kwamanzi okungekuhle kanye nokulawula ukugeleza ohlelweni lokupholisa lwensimbi yensimbi kuholele emikhiqizweni yokugcina engahambisani.Ama-HPBV ayisishiyagalolunye afakiwe awakwazanga ukulawula kahle ukugeleza kwamanzi njengoba kudingekile. Lesi sikhungo besifuna ukufaka amavalvu azolawula kangcono inqubo futhi adingekayo ukuze kuncishiswe izindleko zokuyifaka.Isikhungo sizosebenzisa u-$10,000 ukuze singene esikhundleni sepayipi levalvu ngayinye ukuze isuke ku-HPBV iye kumavalvu ebhola ahlukene. Kunalokho, u-Emerson uncoma ukusebenzisa uvemvane lwe-Control-Disk ivalvu ehlangabezana nezilinganiso zobuso nobuso zama-HPBV amanje. Ivalvu ye-Control-Disk yahlolwa ngapha nangapha nenye yama-HPBV ayisishiyagalolunye akhona futhi yasebenza ngokwezidingo ezishiwo.Imboni yashintsha ama-HPBV ayisishiyagalombili asele phakathi nonyaka, ngayinye ifakwe i-Control-Disk valve, iqeda isidingo. ukushintsha amapayipi amanzi angama-90,000 wevalve yebhola ehlukene, futhi ivalve yebhola ibiza cishe u-25% ngaphezu kwevalve uvemvane. Amavalvu e-Control-Disk ahlinzeka ngokulawula okunembile futhi asize ekuqedeni ukuhlukahluka komkhiqizo wokugcina.Isigayo silinganisela ukufakwa kwamavalvu e-Control-Disk ayisishiyagalolunye kuzokonga cishe isigidi esingu-$1 ngonyaka. Uma kuqhathaniswa nezinye izinhlobo zamavalvu amaningi, ama-HPBV anezindawo zokubeka idijithali anezindleko eziphansi zokufaka zokuqala futhi, lapho elinganiswa ngokufanele, ahlinzeka ngebanga elanele lokulawula.Anamandla aphezulu kanye nemikhawulo yokugeleza okuncane. ububanzi, obufana neglobhu noma amavalvu ebhola, futhi athatha kuphela isikhala se-HPBV. Uma ukhetha ama-valve, ikakhulukazi ama-HPBV, qiniseka ukuthi angusayizi olungile, ngaphandle kwalokho angase alawulwe ngesandla yigumbi lokulawula.Kubalulekile futhi ukucabangela isitayela se-valve, izici ezingokwemvelo kanye nosayizi we-valve, okuzohlinzeka ngobubanzi obubanzi bokulawula isicelo. UMark Nymeyer ungumphathi wezokuxhumana emhlabeni wonke we-Emerson Automation Solutions, obhekele ukulawulwa kwethrafikhi. Lokhu akulona i-paywall.Lolu udonga lwamahhala.Asifuni ukuphambana nenhloso yakho lapha, ngakho-ke kuthatha imizuzwana embalwa.