Lapho amakhasimende ethenga ama-valve evemvane e-eccentric ephindwe kathathu, ngokuvamile abhekisela ezinhlotsheni ezimbili zezakhiwo, esisodwa siyisihlalo sensimbi ukuya kwesensimbi kanti esinye siwuhlobo lwezendlalelo eziningi;banezakhiwo ezahlukene futhi amanani nawo ahluke kakhulu.Okulandelayo, ake sixoxe ngomehluko phakathi kwamavalvu ovemvane ahlala ensimbi yonke kanye namavalvu ovemvane avala izingqimba eziningi.
1. Izici zensimbi kuya esihlalweni se-butterfly valves
Amavalvu ovemvane ahlala esihlalweni sensimbi iyi-valve uvemvane enesakhiwo esilula sokuvala, esihlanganisa umzimba wevalvu, ipuleti levalvu, i-valve shaft kanye nendandatho yensimbi yokuvala yonke.Inesakhiwo esihlangene kanye nokuvula nokuvala okuguquguqukayo, ngakho-ke isetshenziswa kabanzi ezimweni ezinokucindezela okuphansi, ukugeleza okuncane, izinga lokushisa eliphezulu kanye nezinhlayiya zothuli ezincane.
Ngemuva kokuvulwa kwepuleti le-valve, isihlalo se-valve yomzimba we-valve siseduze nendandatho yokuvala.Lapho i-valve plate ivalwe ngokuqondile ngokumelene noketshezi, izinhlayiya ezimaphakathi oketshezini ziba nkulu kakhulu noma ziqine kakhulu, okuzodala ukungqubuzana esihlalweni sevalvu noma indandatho yokuvala, kubangele Ukonakala kwesihlalo sevalvu noma indandatho yokuvala ivimbele ukuvaleka ngokuphelele.Lokhu futhi kungenye yeziphambeko zensimbi esihlalweni se-butterfly valve, ngoba ukushintsha njalo kuzoholela ekwenyukeni kokungqubuzana futhi ngaleyo ndlela kuthinte impilo yesevisi.
2. Izici ze-multi-layer triple eccentric butterfly valve
I-Multi-layer butterfly valve iyi-valve yevemvane enesakhiwo esiyinkimbinkimbi sokuvala.Indandatho yokuvala ivamise ukwakhiwa ngezingqimba ezimbili noma ngaphezulu, ezinezingqimba eziningi zokuvala phakathi.Umzimba we-valve kanye nepuleti le-valve le-valve uvemvane elinezingqimba eziningi kuhlanganiswe ngokwezendlalelo.Isendlalelo ngasinye sinesakhiwo sokuvala esizimele, esinganciphisa ngempumelelo ingozi yokuvuza.Ngenxa yokuthi i-multi-layer seal, ngisho noma kunezinhlayiya eziphakathi phakathi nenqubo yokuvala, inqobo nje uma wonke ama-interlayers engonakalisiwe, ngisho noma ungqimba olulodwa lushiywe lungonakalisiwe, ukusebenza kokuvala ngeke kuthinteke.
Amavalvu ovemvane anezingqimba eziningi ngokuvamile asetshenziswa ezimweni zokucindezela okukhulu nezigeleza kakhulu, njengowoyela ongahluziwe, igesi yemvelo, amanzi namanye amapayipi ezimboni.Izinga lokushisa lokusebenza liphakathi -29 degrees kanye 425 degrees.Impahla ye-WCB iyinketho engabizi kakhulu.
3. Umehluko phakathi kwamavalvu ovemvane ensimbi anezingqimba eziningi
1) ukufana kwalezi ziqhingi ezimbili zovemvane
Kokubilii-valve ye-butterfly yensimbi kuya kwensimbikanye ne-valve ye-butterfly enezingqimba eziningi ingafinyelela ukuvala indlela eyodwa noma ukusebenza kokuvala okubili.Ngokwezidingo zomsebenzisi, isethi eyodwa noma amaningi amaringi okuvala ayisipele angashintshwa ukuze ashintshwe kalula uma kwenzeka esetshenziswa ngokungafanele, futhi aklanyelwe ukuba abe amafomu okuvala okuhamba ngezindlela ezimbili.Inzuzo yalo mklamo ukuthi isihlalo se-valve nendandatho yokuvala ingashintshwa ku-inthanethi, futhi imishini ayidingi ukuba ingaxhunyiwe ku-inthanethi ukuze ilungiswe.Ngesikhathi esifanayo, bonke banenzuzo yokuqina futhi baqina.
2) umehluko phakathi kwalezi ziqhingi ezimbili zovemvane
Umehluko omkhulu usesimeni kanye nezimo zohlelo lokusebenza.
① umehluko wesakhiwo
I-valve butterfly enezingqimba eziningi
· Isakhiwo se-valve ye-butterfly enezingqimba eziningi iyinqwaba yamashidi ensimbi ne-graphite, okusho ukuthi indandatho yokuvala ngokuvamile yakhiwe ngezingqimba ezimbili noma ngaphezulu, ezinezingqimba eziningi zokuvala phakathi.Umzimba we-valve kanye ne-valve plate ye-valve butterfly enezingqimba eziningi kuhlanganiswe ngezingqimba, futhi ungqimba ngalunye lunesakhiwo sokuvala esizimele.
· Ipheya elivalayo le-all-metal two-way sealing butterfly valve, okungukuthi, indandatho yokuvala kanye nesihlalo sevalvu, zenziwe nge-all-metal forging.Indandatho yokuvala ingaba ngaphezulu noma ifafaze ishiselwe ngama-alloy ahlukahlukene amelana nezinga lokushisa.
Zonke izihlalo zensimbi uvemvane valve
② Isicelo
I-valve ye-butterfly ye-Metal kuya kwensimbi ifaneleka ukucindezela okuphansi, ukugeleza okuncane, nezimo zokushisa eziphezulu;i-valve ye-butterfly enezingqimba eziningi inesakhiwo sokuvala se-multi-layer esiphelele, esinganciphisa ngempumelelo ingozi yokuvuza.
4. Ukusebenza kokuvalwa kwensimbi kuya kwensimbi kwamavalvu ovemvane namavalve uvemvane anezingqimba eziningi
Ngokwezinga le-API598, i-valve uvemvane onokuthintana kwensimbi eqinile ingaba nenani lokuvuza, kodwa i-valve uvemvane enezindandatho zokuvala ezinezingqimba eziningi ingafinyelela ukuvalwa okungu-0 futhi ibe nokusebenza okuphezulu kokuvala.
5. Izinto zama-valve uvemvane ezivala zonke izinsimbi kanye namavalvu evemvane avala izendlalelo eziningi
·Isigxivizo sensimbi esigcwele: Isihlalo se-valve ngokuvamile sine-Stellite, impahla yomzimba yi-WCB, SS304, SS316, SS2205, SS2507, futhi indandatho yokuvala ipuleti ye-valve ingakhethwa ngokuya ngezinto zepuleti le-valve;
·Indandatho yokuvala enezendlalelo eziningi: Izinto zesihlalo sevalvu: I-Stellite, noma impahla yomzimba, indandatho yokuvala ipuleti levalvu ngokuvamile isebenzisa i-RPTFE/PTFE+metal, graphite+metal;
Ngokuvamile, ama-valve ovemvane aphuma phambili kanye namavalve evemvane anezinga eliningi anezimo zawo ezisebenzayo, futhi abasebenzisi bangakhetha uhlobo olufanele lwevalve uvemvane ngokuya ngesimo sangempela.Lapho ukhetha i-valve ye-butterfly, imingcele efana nokucindezela kwamanzi, izinga lokushisa, izinga lokugeleza kanye nesilinganiso kufanele kucatshangelwe ukuze kukhethwe uhlobo olufanele lwe-butterfly valve futhi kuqinisekiswe ukusebenza okuvamile kwe-valve.
Uma izinga lokushisa liphezulu kakhulu futhi zingekho izinhlayiya ezinkulu, ungakhetha i-valve uvemvane evalwe ngokuqinile yensimbi yonke.
Uma izinga lokushisa lingephezulu kakhulu futhi okuphakathi kuqukethe izinhlayiya, khetha i-valve uvemvane oluvala ungqimba olunenani eliphansi.