Izivalo zebhabhathane zisetyenziselwa ukuqalisa, ukumisa okanye ukulawula ukuhamba kolwelo okanye iigesi ngemibhobho. Bafumana igama labo kwidiski efana nephiko ejikeleza ngaphakathi kumzimba wevalvu, efana nentshukumo yebhabhathane. Phakathi kweentlobo ezahlukeneyo zeevalvu zebhabhathane, iivalve zebhabhathane ezisebenza kakhulu (HPBV) kunye neevalvu zebhabhathane ezigxininisiweyo zezona ziyilo zimbini. Olu thelekiso luya kuqhawula umahluko phakathi kwezi zimbini ukusuka kwimilinganiselo emininzi ukucacisa iindima zabo kwimizi-mveliso kunye nezicelo zikamasipala.
| Uphawu | IValve yeButterfly ephakathi | IValve yebhabhathane esebenza ngokuPhezulu |
| Yila | Isiqu esisembindini kunye nediski | Isiqu se-offset esinesihlalo sentsimbi |
| Indlela yokutywina | Isihlalo esithambileyo se-elastomeric | RPTFE isihlalo |
| Ixabiso loxinzelelo | Ukuya kuthi ga kwi-250 PSI | Ukuya kuthi ga kwi-600 PSI |
| Umlinganiselo wobushushu | Ukuya kuthi ga kwi-180°C (356°F) | Ukuya kuma-260°C (536°F) |
| Nxiba kunye nokukrazula | Iphezulu ngenxa yoqhagamshelwano lwesitulo | Isezantsi ngenxa yoyilo lokulinganisa |
| Ukufaneleka kwesicelo | Ulwelo olunoxinzelelo oluphantsi | Uxinzelelo oluphakathi, ulwelo olunobushushu obuphezulu |
| Iindleko | Ngasezantsi | Phezulu |
1. Uyilo kunye noKwakha
Umahluko ongundoqo phakathi kweevalvu zebhabhathane ezixineneyo kunye neevalvu zebhabhathane ezisebenza kakhulu ilele kuyilo lwazo lolwakhiwo, ngokukodwa indawo yesikhondo sevalve kunye nediski yevalve ngokunxulumene nomzimba wevalvu kunye nezinto ezisetyenzisiweyo.
1.1 IiValuvu zeBhavane eziNxinzeleleyo
Uyilo olugxininisiweyo lwaziwa njenge "zero offset" okanye "isitulo esiqinileyo", ukulungelelanisa isikhondo sevalve kunye nediski yevalvu ngqo kumbindi womzimba wevalve kunye nokubhobhoza kombhobho. Olu lungelelwaniso olusembindini alunanxaki.
1.1.1 iNtshukumo yeDiskhi
I-disc ijikeleza i-90 ° malunga ne-axis ye-valve stem, kwaye isuka ekuvuleni ngokupheleleyo (ihambelana nombhobho) ukuze ivalwe ngokupheleleyo (i-perpendicular to pipe) kulo lonke uluhlu lwalo lokuhamba.
1.1.2 Inkqubo yokutywina
Isitywina siphunyezwa ngokungena kophazamiseko phakathi komphetho wediski yevalve kunye nesihlalo sevalve eyomelelayo yerabha (efana ne-EPDM, i-acrylic okanye i-fluororubber) efaka umphezulu ongaphakathi womzimba wevalvu.
1.1.3 Izixhobo
Umzimba wevalvu udla ngokwenziwa ngezinto ezinokuqina okuphezulu kunye nezinto ezikwaziyo ukugilana njengentsimbi etyhidiweyo, intsimbi edityanisiweyo okanye intsimbi engenasiphene ukwenzela ukusetyenziswa okungafunwayo kangako, kuba isitulo sevalve yerabha sithintela ukudibana kolwelo nomzimba wevalvu.
I-disc inokuba yintsimbi engenasici, i-aluminiyam yobhedu, i-coated ductile iron, okanye ifakwe ngokupheleleyo ngesinyithi, kuxhomekeke kwi-corrosiveness of fluid.
1.2 IiValuvu zeBhavane eziSebenza ngokuPhezulu
Ngokuqhelekileyo uyilo oluphindwe kabini olunezitshixo ezimbini:
Isiqu sibekwe emva kwediski kunokuba sidlule kumbindi wediski, kwaye
I-disc kunye ne-stem assembly ikhutshwe kwi-centerline ye-bore bore.
Ezinye iinguqulelo eziphambili zibandakanya ii-offsets ezintathu, kodwa i-double offset isemgangathweni kwiimodeli zokusebenza eziphezulu.
1.2.1 iNtshukumo yeDiskhi
Ngenxa ye-offset, i-disc ijikeleza kwisenzo esifana nekhamera, ukunciphisa ukudibanisa nesihlalo.
1.2.2 Inkqubo yokutywina
Isihlalo senziwe ngezinto ezihlala ixesha elide, ezifana neTeflon eyomeleziweyo, ukumelana noxinzelelo oluphezulu kunye namaqondo obushushu. Ngokungafaniyo nesihlalo serabha kwivalve egxininisiweyo, itywina liqina kwaye lixhomekeke kancinci kwi-deformation.
1.2.3 Izixhobo
Umzimba kunye nediski zenziwe ngesinyithi esomeleleyo, njengensimbi engenasici, i-carbon steel, okanye i-alloys, ukumelana neemeko ezinzima.
1.3 Isishwankathelo: Iimpembelelo zoyilo
Ubulula bevalve ye-concentric yenza ukuba ibe khaphukhaphu kwaye idibanise, iyenze ilungele ukufakela ngokuthe ngqo. Nangona kunjalo, ukuthembela kwayo kwisitulo serabha esinokukhubazeka kunciphisa ukuguquguquka kwayo.
Uyilo lwe-offset kunye nezixhobo ezinamandla zeevalve eziphezulu zokusebenza ziphucula ukuqina kwazo kunye nokuguquguquka, kodwa ngeendleko zokunyuka kobunzima kunye nobunzima.
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2. Izakhono zokuSebenza
Ukusebenza ngowona mba uguquguqukayo kakhulu wezi valve kunye neyona nto ixabiseke kakhulu kwaye ikhathalelwe ngabasebenzisi. Ngokukodwa, ihlalutywa ngokwemiqathango yoxinzelelo, ubushushu, umphumo wokutywina kunye nobomi benkonzo.
2.1 IiValuvu zeBhavane eziNxinzeleleyo
2.1.1 Amanqaku oxinzelelo
Iivalvu zebhabhathane ezigxininisiweyo zinokumelana ngokubanzi noxinzelelo ukuya kuthi ga kwi-PN16, kodwa oku kuyahluka ngokuxhomekeke kubukhulu kunye nezinto. Ngaphezulu kolu xinzelelo, isihlalo serabha sinokukhubaza okanye singaphumeleli.
2.1.2 Amazinga obushushu
Ubushushu obuphezulu yi-356 ° F (180 ° C), bukhawulelwe yimida ye-thermal yerubha okanye isihlalo se-PTFE. Ukushisa okuphezulu kuya kuthoba ukusebenza kwe-elastomer kwaye kuphazamise ukutywinwa.
2.1.3 Ukusebenza kokutywina
Inokubonelela ngokuvalwa okuthembekileyo kwiinkqubo zoxinzelelo oluphantsi, kodwa ukungqubuzana okuqhubekayo phakathi kwediski ye-valve kunye nesihlalo se-valve kuya kubangela ukugqoka, okuya kunciphisa ukusebenza kakuhle.
2.1.4 Ukubhuqa
Ekubeni iivalve ze-butterfly zifaneleke ngakumbi ukuvulwa ngokupheleleyo kunye nokuvala, ukuba zisetyenziselwa ukulawulwa kokuhamba, i-throttling yexesha elide iya kukhawulezisa ukugqoka kwesihlalo se-valve, okwenza kube lula kwaye kungabikho.
2.1.5 Ukuqina
Ukuba nelastiki, intsimbi okanye izitulo zevalve eziqiniweyo zomelele ngakumbi kunerabha. Uyilo lwe-offset lwandisa ngakumbi ubomi benkonzo ngokunciphisa ingxabano.
2.2 Ivalve yebhabhathane esebenza kakhulu
2.2.1 Iqondo loxinzelelo
Ngenxa yobume bayo obunqabileyo kunye noyilo lwe-offset olunciphisa uxinzelelo kwisihlalo sevalve, inokumelana noxinzelelo ukuya kwi-PN16.
2.2.2 Iqondo lobushushu
Ekubeni isihlalo sevalve sisebenzisa i-RPTFE, sinokusebenza ngokufanelekileyo kumaqondo okushisa ukuya kuma-536 ° F (280 ° C).
2.2.3 Ukusebenza kokutywina
Ngenxa yokufaneleka ngokuchanekileyo kwediski yevalve yokucima kunye nesitulo sevalvu ehlala ixesha elide, ukuvuza kuphantse kube ngu-zero kwaye kuhlala kufutshane nokuvalwa kungangeni moya. Oku kuyenza ilungele izicelo ezibalulekileyo.
2.2.4 Ukubhuqa
Ulwakhiwo kunye nezinto ezisetyenziswa kwiivalvu zebhabhathane ezisebenza kakhulu zibenza bakwazi ukulawula ngokuchanekileyo ukuhamba nokuba kuxinzelelo oluphezulu. Ukuncitshiswa koqhagamshelwano lwesihlalo kunciphisa ukunxiba kunye nokugcina ingqibelelo yetywina kwimijikelo emininzi.
2.2.5 Ukuqina
Ukuqina ngakumbi, izihlalo zetsimbi okanye ezomeleziweyo zihlala zihlala ixesha elide kunerabha. Uyilo lwe-offset lwandisa ngakumbi ubomi benkonzo ngokunciphisa ingxabano.
2.3 Isishwankathelo: Iimbalasane zoMsebenzi
Iivalve ezigxininisiweyo zifanelekile kuxinzelelo oluphantsi, iimeko ezizinzileyo, kodwa zingaphumeleli kwiingcinezelo eziphakathi kunye neziphezulu.
Iivalve eziphezulu zokusebenza zinika ukuthembeka okuphezulu kunye nobomi benkonzo kwixabiso eliphezulu lokuqala.
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3. Izicelo
Ukhetho phakathi kweevalve zebhabhathane ze-midline kunye ne-high-performance butterfly valves kuxhomekeke kwiimfuno ezithile zenkqubo apho zifakwe khona.
3.1 IiValuvu zeBhavane eziPhambili
Kwiinkqubo eziphantsi ukuya phakathi zoxinzelelo / ubushushu apho iindleko kunye nokulula zizinto eziphambili.
Ukusetyenziswa okuqhelekileyo:
- Amanzi kunye naManzi amdaka: Imibhobho yamanzi kamasipala, inkqubo yokunkcenkceshela kunye nogutyulo lwelindle iyaxhamla kuqoqosho lwazo kunye nokwahlulwa kolwelo.
- Ukutya kunye namaYeza: Izitulo zerabha zithintela ulwelo olubuthathaka ukuba lungosuleli ngumzimba wevalvu.
- Ubonelelo ngerhasi: Iintambo zegesi ezinoxinzelelo oluphantsi ziyisebenzisela ukucima/ukulawula.
- Ukukhuselwa koMlilo: Iinkqubo zokutshiza zithatha ithuba lokusebenza ngokukhawuleza kunye nokuthembeka kwiingcinezelo eziphakathi.
- Umphunga woxinzelelo oluphantsi: Ukwenzela umphunga ukuya kuma-250 PSI kunye nama-350°F.
3.2 IiValuvu zeBhavane eziSebenza ngokuPhezulu
Uxinzelelo oluphakathi okanye iinkqubo ezibalulekileyo ezifuna ukuchaneka kunye nokuqina.
Ukusetyenziswa okuqhelekileyo:
- I-oyile kunye neGesi: Ilawula iikhemikhali ezinoburharha, iikhemikhali zepetroli, kunye neemeko ezingaselunxwemeni ezinoxinzelelo oluphezulu kunye nolwelo olonakalisayo.
- Ukuveliswa koMbane: Ulawula umphunga woxinzelelo oluphezulu kunye namanzi okupholisa kwiiinjini zomoya kunye neebhoyila.
- Ukulungiswa kweekhemikhali: Ixhathisa ulwelo olunokutya kwaye igcina ukuvalwa okuqinileyo kwindawo eguqukayo.
-HVAC: Kwiinkqubo ezinkulu ezifuna ulawulo lokuhamba oluchanekileyo.
- Ukwakhiwa kweenqanawa: Ukumelana neemeko zaselwandle kunye nokulawulwa koxinzelelo oluphezulu lwamanzi.
3.3 Ukusebenzisana ngokudibana kunye neeyantlukwano
Ngelixa zombini iivalvu zilawula ukuhamba, iivalve ezigxininisiweyo zilawula kwiindawo ezingabalulekanga kangako, ngelixa iivalve ezisebenza ngokuphezulu zikhethwa kwiinkqubo zoshishino apho ukungaphumeleli kunokuba nemiphumo emibi.
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4. IiNgqwalasela zokuSebenza
Ukongeza kuyilo kunye nokusetyenziswa, izinto ezisebenzayo ezifana nokufakela, ukugcinwa, kunye nokudibanisa inkqubo efanelekileyo nayo idlala indima.
4.1 Ufakelo
- I-Concentric: Ufakelo olulula ngenxa yobunzima obulula kunye nokuhambelana okulula kwe-flange.
- Ukusebenza okuphezulu: Ulungelelwaniso oluchanekileyo luyafuneka ngenxa yoyilo lwe-offset, kwaye ubunzima bayo bufuna inkxaso enamandla.
4.2 Ugcino
- I-Concentric: Ukugcinwa kugxininise ekutshintsheni isihlalo serabha, yindlela yokulungisa ngokukhawuleza kunye nexabiso eliphantsi. Nangona kunjalo, ukugqoka rhoqo kunokunyusa ixesha lokunciphisa kwiinkqubo eziphezulu zokujikeleza.
- Ukusebenza okuphezulu: Ugcino lunqabile ngenxa yesitulo esihlala ixesha elide, kodwa ukulungiswa (umzekelo, ukutshintshwa kwesihlalo) kubiza kakhulu kwaye zobugcisa, ngokuqhelekileyo kufuna abasebenzi abaqeqeshiweyo bolondolozo abanezixhobo ezizodwa.
4.3 Ukwehla koxinzelelo
I-Concentric: Iidiski ezizinzisiweyo zenza isiphithiphithi ngakumbi xa sivula ngokuyinxenye, ukunciphisa ukusebenza kakuhle kwi-throttling applications.
- Ukusebenza okuphezulu: Iidiski ze-Offset ziphucula iimpawu zokuhamba, ukunciphisa i-cavitation kunye nokuhla koxinzelelo, ngokukodwa kwisantya esiphezulu.
4.4 Ukwenza
Zombini iivalvu zinokusetyenziswa nge-manual, i-pneumatic, okanye i-actuator yombane, kodwa iivalve ezisebenza ngokuphezulu zihlala zidityaniswa nolawulo oluphambili lwe-automation echanekileyo kwizicwangciso zeshishini.
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5. Uhlalutyo lweendleko kunye noBomi boMjikelo
5.1 Iindleko zokuqala
Iivalvu ezigxininisiweyo zixabiso eliphantsi kakhulu kuba zilula ukuzakha kwaye zisebenzise imathiriyeli encinci. Oku akunjalo ngeevalvu zebhabhathane ezisebenza kakhulu.
5.2 Iindleko zoMjikelo woBomi
Iivalvu ezisebenza kakhulu zinoqoqosho ngakumbi ekuhambeni kwexesha kuba azisoloko zigcinwa kwaye zitshintshwe. Kwiinkqubo ezibalulekileyo, ukuthembeka kwabo kunokunciphisa iindleko zokunciphisa ixesha.
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6. Isiphelo: Isishwankathelo sezinto eziluncedo nezingeloncedo
6.1 IValve yeBhava eNxibelele
6.1.1 Izinto ezilungileyo:
- Ukusebenza kakuhle kweendleko: Iindleko ezisezantsi zokwenziwa kwezinto kunye nezixhobo zinika inzuzo yohlahlo lwabiwo-mali.
-Uyilo olulula: Kulula ukuyifaka, ukusebenza, kunye nokugcina, kunye neendawo ezimbalwa ezihambayo.
- Ukwahlukaniswa kwe-Fluid: Izihlalo zerabha zikhusela umzimba wevalvu, zivumela ukusetyenziswa kwezinto ezingabizi kakhulu kunye nokugcina ubunyulu bolwelo.
- Ikhaphukhaphu: Ilungele usetyenziso apho ubunzima buyinkxalabo.
6.1.2 Izinto ezingeloncedo:
- Uluhlu olulinganiselweyo: Imida ephezulu yi-250 PSI kunye ne-356 ° F, ukunciphisa ukusetyenziswa kwayo kwiimeko ezinzima.
-Kusenokwenzeka ukunxitywa: Ukungqubana kwezihlalo rhoqo kunokukhokelela ekusebenzeni okuthotyiweyo, kufuna ukulungiswa rhoqo.
- Ukusebenza kakubi kwe-high-pressure throttling: Ilahlekelwa ngokuchanekileyo kunye nokutywinwa phantsi koxinzelelo.
6.2 IiValuvu zeBhavane eziSebenza ngokuPhezulu
6.2.1 Izinto ezilungileyo:
- Umthamo ophezulu: Uyakwazi ukuphatha uxinzelelo oluphakathi ukuya phezulu (ukuya kwi-600 PSI) kunye namaqondo okushisa (ukuya kwi-536 ° F).
- Ubomi beNkonzo ende: Ukunciphisa isihlalo sokunxiba kunye nezinto ezihlala zihlala zandisa ubomi benkonzo.
- Ukuchaneka: Ukubethelwa okugqwesileyo kunye nokuvala umlomo naphantsi kweemeko ezinzima.
- Ukuguquguquka: Ilungele uluhlu olubanzi lolwelo kunye nokusingqongileyo.
6.2.2 Izinto ezingeloncedo:
- Iindleko eziphezulu: Izinto ezixabisa kakhulu kunye noyilo oluntsonkothileyo lunyusa utyalo-mali lwangaphambili.
- Ukuntsonkotha: Ufakelo kunye nokulungiswa kufuna ubuchule ngakumbi.
- Ubunzima: Ulwakhiwo olunzima lunokwenza kube nzima ukulungisa ngokutsha ezinye iinkqubo.
Iivalvu zebhabhathane ezixineneyo kunye neevalvu zebhabhathane ezisebenza ngokuphezulu zisebenza ngokudibana kodwa iindawo ezahlukeneyo kulawulo lolwelo. I-zero-offset ye-rubber ye-design yesihlalo se-valve ye-concentric yenza ukuba kube yinto esebenzayo kunye nefikelelekayo kwizicelo ezimodareyitha ezifana nokubonelela ngamanzi, ukulungiswa kokutya okanye ukukhuselwa komlilo. Ukuba ukusebenza kunye nokuqina akuxoxiswana, ngoko i-valve ye-butterfly ephezulu iyimpendulo. Kwizinto ezingcwatyiweyo (ezifana nemibhobho engaphantsi komhlaba), zombini ezi ndlela zingasetyenziswa, kodwa ubunzima obukhaphukhaphu kunye nexabiso eliphantsi levalve yokugxilwa kwevalufa zikholisa ukongama ngaphandle kokuba iimeko ezinzima zifuna ngenye indlela.