Amavalvu ovemvane angamathuluzi okulawula ukugeleza kwekota asebenzisa idiski yensimbi ezungeza i-axis yesiqu esigxilile.Angamavalvu okulawula ukugeleza asebenza ngokushesha avumela amadigri angu-90 okuzungeza ukusuka endaweni evuleke ngokugcwele iye endaweni evalekile.
Uma i-disc i-perpendicular to the centerline yepayipi, i-valve isendaweni evaliwe.Lapho i-disc ihambisana nendawo ephakathi yepayipi, i-valve izovuleka ngokugcwele (ivumela ukugeleza kwamanzi amaningi) .Ubukhulu bokugeleza kokugeleza. indlela yokulawula (idiski) icishe ilingane nobubanzi bangaphakathi bepayipi eliseduze.
Lawa ma-valve eza ngobukhulu obuhlukene kanye nemiklamo enquma ukusebenza kwawo ekusetshenzisweni kwezinqubo zezimboni; izicelo valve sanitary; izinkonzo zomlilo; izinhlelo zokufudumeza, zokungenisa umoya, nezomoya (HVAC); kanye nama-slurries.Ngokwebanzi, ama-valve ovemvane abalulekile ekulawuleni ukugeleza nokuhlukaniswa kokugeleza.
Ukunyakaza kwediski kuyaqala, kubambezela noma kumise ukugeleza koketshezi.Izinhlelo zokusebenza ezidinga ukunemba okuphezulu zincike kumavalve uvemvane acushiwe aqapha izimo zamapayipi, ukuvula noma ukuvala ivalvu njengoba kudingekile ukuze kugcinwe izinga lokugeleza elifanayo.Amavalvu ovemvane asetshenziselwa ukulawula ukugeleza ane esinye sezici zokugeleza ezilandelayo:
• Cishe umugqa - izinga lokugeleza lilingana nokunyakaza kwe-angular ye-disc.Isibonelo, lapho i-disc ivuliwe ngo-40%, ukugeleza kuyi-40% yobukhulu.Lesi sici sokugeleza sivamile kuma-valve e-butterfly asebenza kakhulu.
• Ukuvuleka okusheshayo - Lesi sici sokugeleza siboniswa lapho kusetshenziswa ama-butterfly ahlezi eqinile.Izinga lokugeleza kwamanzi liphakeme kakhulu lapho i-disc ihamba isuka endaweni evaliwe.Njengoba i-valve isondela endaweni evulekile ngokugcwele, ukugeleza kwehla kancane kancane ngoshintsho oluncane.
• I-Flow Isolation - Amavalvu ovemvane anganikeza insizakalo yokuvula/ukuvala uketshezi.Ukuhlukaniswa kokugeleza kuyadingeka noma nini lapho ingxenye ethile yohlelo lwamapayipi idinga ukulungiswa.
Ama-valve e-butterfly afaneleka ekusetshenzisweni okuhlukahlukene ngenxa yokuklama kwawo okulula nokusebenza okusheshayo.Ama-butterfly valves ahlezi kahle alungele izinga lokushisa eliphansi, izinhlelo zokusebenza zokucindezela okuphansi, kuyilapho ama-butterfly ahlala ensimbi enekhono elihle lokuvala uma ephethe izimo ezinzima zamanzi.Le nqubo iyasebenza. emazingeni okushisa aphezulu kanye nezingcindezi futhi idlulisa uketshezi olubonakalayo noma olubolayo.Izinzuzo zamavalve ovemvane zihlanganisa:
• Ukwakhiwa okungasindi futhi okuhlangene—Amavalvu ovemvane asebenzisa amadiski ensimbi azacile njengendlela yokulawula ukugeleza. Amadiski mancane futhi athatha indawo encane, kodwa aqine ngokwanele ukulawula ukugeleza koketshezi. Lawa mavalvu anomzimba ohlangene okwenza afanelekele ukusetshenziswa. ezinhlelweni zamapayipi ezindaweni eziwumngcingo.Amapayipi anobubanzi obukhulu adinga amavalvu amakhulu asebenzisa izinto zokwakha ezengeziwe, izindleko ezikhuphukayo.Ivalve uvemvane izobiza kancane kune-valve yebhola enobukhulu obufanayo ngoba idla impahla encane ukuyikhiqiza.
• Ukuvalwa Okusheshayo Nokuphumelelayo - Amavalvu ovemvane ahlinzeka ngokuvaleka ngokushesha lapho esebenza, okuwenza alungele ukusetshenziswa kokugeleza okunembayo okuphezulu.Izimpawu zokuvala zevalve uvemvane zincike ohlotsheni lwe-disc offset kanye nesimo sendawo yokuhlala.Ivalve uvemvane oyiziro offset izohlinzeka ngokuvala okwanele kwezicelo zokucindezela okuphansi - kufika kumakhilogremu angu-250 nge-intshi yesikwele (psi).I-valve ye-double offset inikeza ukuvalwa okuhle kakhulu kwezinqubo ezifika ku-1,440 psi.Ama-valve amathathu okuvala ahlinzeka ngokuvala izinhlelo zokusebenza zokugeleza ngaphezu kwe-1,440 psi.
• Ukwehla Kokucindezela Okuphansi kanye Nokubuyisela Umfutho Ophakeme - Amavalvu e-Butterfly anengcindezi ephansi yokwehla naphezu kokuthi idiski ihlala ikhona kuketshezi. uketshezi ukuze kutholakale amandla ngokushesha ngemva kokushiya i-valve.
• Izidingo eziphansi zokunakekela - Amavalvu ovemvane anezakhi zangaphakathi ezimbalwa.Awanawo amaphakethe angabamba uketshezi noma imfucumfucu, ngakho-ke, adinga ukungenelela ekulungiseni okuncane.Ukufakwa kwawo kulula njengoba adinga ukubambana phakathi kwama-flange amapayipi aseduze.Ayikho inqubo yokufaka eyinkimbinkimbi. njengokushisela kuyadingeka.
• Ukusebenza Okulula - Ngenxa yobukhulu bawo obuhlangene nesisindo esilula, ama-valve ovemvane adinga i-torque ephansi ukuze asebenze.Amadiski ensimbi azacile asebenzisa amandla amancane ukuze anqobe ukungqubuzana koketshezi.Amavalvu ovemvane kulula ukuwenza ngokuzenzakalelayo ngoba ama-actuator amancane angakwazi hlinzeka nge-torque eyanele yokusebenza kwazo.Lokhu kuhumusha ezindlekweni eziphansi zokusebenza - ama-actuator amancane adla amandla amancane futhi abiza kancane ukwengeza ku-valve.
• Ama-valve e-Butterfly angathinteka ku-cavitation kanye nokugeleza okuvinjiwe - endaweni evulekile, i-valve ayihlinzeki ngembobo egcwele.Ukuba khona kwe-disc endleleni yokugeleza kwamanzi kwandisa ukunqwabelana kwemfucumfucu ezungeze i-valve, okwandisa amandla okuba ne-cavitation. Ama-valve ebhola angenye yezinhlelo zokusebenza eziwuketshezi ezidinga izimbobo ezigcwele.
• Ukugqwala okusheshayo ezinsizeni zoketshezi lwe-viscous - uketshezi lushayela ama-valve uvemvane njengoba lugeleza kuwo. Ngokuhamba kwesikhathi, ama-disc ayawohloka futhi awasakwazi ukunikeza uphawu. Amazinga okugqwala azoba phezulu uma uphatha izinsiza zoketshezi lwe-viscous. ukumelana kunama-butterfly valves.
• Ayifaneleki i-high pressure throttling - i-valve kufanele isetshenziselwe kuphela ukudonsa ezindaweni zokucindezela okuphansi, okulinganiselwe ku-degrees angu-30 kuya ku-80 wokuvula.Ama-valve e-globe anamandla angcono okudonsa kunama-butterfly valves.
I-valve flap endaweni evuleke ngokugcwele ivimbela ukuhlanzwa kwesistimu futhi ivimbela ukugqwala komugqa oqukethe i-valve uvemvane.
Indawo yokufaka i-valve uvemvane ngokuvamile iphakathi kwama-flanges.Ama-valve ovemvane kufanele afakwe okungenani amadayamitha amapayipi amane kuya kwayisithupha ukusuka emibhobolweni yokuphuma, izindololwane, noma amagatsha ukuze kuncishiswe imiphumela yesiyaluyalu.
Ngaphambi kokufaka, hlanza amapayipi futhi uhlole ama-flanges ukuthi abushelelezi/aphansi.Qinisekisa ukuthi amapayipi aqondile.Lapho ufaka ivalvu, gcina idiski isendaweni evulekile kancane.Ama-Flanges angase adinge ukunwetshwa ukuze kugwenywe ukulimala endaweni yokuhlala.Sebenzisa umshayeli wendiza. izimbobo noma izihlilingi ezizungeze umzimba wevalvu lapho uphakamisa noma uhambisa ivalvu.Gwema ukuphakamisa ivalvu ku-actuator noma ku-opharetha wayo.
Qondanisa i-valve nebhawodi yokufaka yepayipi eliseduze.Qinisa amabhawodi ngesandla, bese usebenzisa i-wrench ye-torque ukuze uqinise amabhawodi kancane futhi ngokulinganayo, ulinganisele ukuvuleka phakathi kwawo ne-flange.Jikisa i-valve endaweni evuleke ngokugcwele futhi usebenzise i-torque wrench ukuze uqinise amabhawodi ukuze uhlole ukushuba okulinganayo kumabhawodi.
Ukugcinwa kwamavalvu kuhlanganisa ukugcotshwa kwezingxenye zemishini, ukuhlolwa nokulungiswa kwama-actuator.Amavavu adinga ukugcotshwa ngezikhathi ezithile ahlanganisa okokufaka okugcotshwe ngamafutha.Igrisi eyanele ye-lithium-based kufanele isetshenziswe ngezikhathi ezinconyiwe ukuze kuncishiswe ukugqwala nokugqwala.
Kubalulekile futhi ukuhlola njalo i-actuator ukuze kubonakale noma yiziphi izimpawu zokuguga noma ukuxega kokuxhumana kukagesi, okomoya noma ukudonsa amanzi okungase kuphazamise ukusebenza kwamavalvu.
Ukwengeza, umsebenzisi kufanele ahlanze zonke izingxenye ze-valve uvemvane nge-lubricant esekelwe ku-silicone.Isihlalo kufanele sihlolwe noma yiziphi izimpawu zokuguga futhi sishintshwe uma kunesidingo.Ama-valve e-butterfly asetshenziswa ezinhlelweni ezomile ezifana nesevisi yomoya ocindezelweyo adinga ukugcotshwa. Amavalvu ovemvane ajikeleza ngokungavamile kufanele asetshenziswe okungenani kanye ngenyanga.
Ukukhetha i-valve kungase kubonakale kuwumsebenzi wokukhetha kanye nokukhwelana, kodwa kunezicaciso ezimbalwa zobuchwepheshe okufanele zicatshangelwe.Okokuqala kuhilela ukuqonda uhlobo lokulawula uketshezi oludingekayo kanye nohlobo loketshezi lwesevisi.Amasevisi oketshezi olubolayo adinga amavalvu enziwe ngensimbi engagqwali, i-nichrome, noma ezinye izinto ezimelana nokugqwala.
Abasebenzisi kudingeka bacabangele ukushintsha kwamandla, ukucindezela kanye nezinga lokushisa lohlelo lwamapayipi kanye nezinga lokuzenzekelayo elidingekayo.Nakuba amavalvu ovemvane acushiwe enikeza ukulawulwa kokugeleza okunembile, abiza kakhulu kunozakwabo abawasebenza mathupha.Amavalvu ovemvane awalawuleki futhi awanikezi. ichweba eligcwele.
Uma umsebenzisi engenasiqiniseko mayelana nokuhambisana kwamakhemikhali kwenqubo noma ukukhethwa kwe-actuation, inkampani yamavalvu eqeqeshiwe ingasiza ekuqinisekiseni ukukhetha okulungile.
UGilbert Welsford Jr. ungumsunguli weValveMan kanye nosomabhizinisi wesizukulwane sesithathu weValve.Ukuze uthole ulwazi olwengeziwe, vakashela i-Valveman.com.
Isikhathi sokuthumela: Apr-14-2022
