Ukukhetha ivalvu yebhola kubonakala kulula ude ubone zonke iindlela onokukhetha kuzo. Khetha engalunganga, kwaye ungajongana nokuhamba okulinganiselweyo, ulawulo olubi, okanye nokusilela kwenkqubo.

Iintlobo ezine eziphambili zeevalvu zebhola zahlulwe ngokwemisebenzi yazo kunye noyilo lwazo: ivalvu yebhola edadayo, ivalvu yebhola efakwe kwi-trunnion, ivalvu egcweleyo, kunye nevalvu ye-reduced-port. Ngayinye ifanelekile kwiingcinezelo ezahlukeneyo kunye neemfuno zokuhamba kwamanzi.

Ndidla ngokuthetha noBudi, umphathi wokuthenga komnye wamaqabane ethu eIndonesia, malunga nokuqeqesha iqela lakhe lokuthengisa. Enye yezona zinto zinzima kubathengisi abatsha kukwahluka kweevalvu. Bayaqonda umsebenzi osisiseko wokuvula/ukucima, kodwa emva koko badibana namagama anje “i-trunnion^[1],” “I-L-port,” okanye “ukudada^[2].” Umthengi usenokucela ivalvu yomgca woxinzelelo oluphezulu, kwaye umthengisi omtsha unokubonelela ngevalvu eqhelekileyo edadayo xa ivalvu ye-trunnion yeyona nto ifunekayo. Ukuhlulahlula ezi ndidi zibe ziingcamango ezilula neziqondakalayo kubalulekile. Akupheleli nje ekuthengiseni imveliso; kukubonelela ngesisombululo esifanelekileyo ukuze iprojekthi yomthengi iphumelele.

Ziziphi iintlobo ezine zeevalvu zebhola?

Udinga ivalvu, kodwa ikhathalogu ibonisa iintlobo ezininzi. Ukusebenzisa engalunganga kunokubangela ingxaki kwinkqubo yakho okanye kuthetha ukuba uhlawula kakhulu ngezinto ongazidingiyo.

Iivalvu zebhola zihlala zahlulwahlulwa ngokoyilo lwazo lwebhola kunye nobukhulu bebhore. Iintlobo ezine eziqhelekileyo zezi: ezidadayo nezifakwe kwi-trunnion (ngenkxaso yebhola) kunye nezimbobo ezipheleleyo nezimbobo ezincitshisiweyo (ngobukhulu bokuvula). Nganye inikezela ngebhalansi eyahlukileyo yokusebenza kunye neendleko.

Masizihlalutye ngokulula ezi zinto. Iintlobo ezimbini zokuqala zimalunga nendlela ibhola exhaswa ngayo ngaphakathi kwivalvu.ivalvu yebhola edadayo^[3]lolona hlobo luqhelekileyo; ibhola ibanjwe kwindawo yayo zizihlalo ezisezantsi neziphezulu. Ilungele uninzi lwezicelo ezisemgangathweni.ivalvu efakwe kwi-trunnion^[4]ineenkxaso ezongezelelweyo zoomatshini—isiqu phezulu kunye nesiqu esisezantsi—esibamba ibhola. Oku kuyenza ifaneleke kwiivalvu ezinoxinzelelo oluphezulu okanye ezinkulu kakhulu. Ezi ntlobo zimbini zilandelayo zilingana nobukhulu bomngxuma odlula ebholeni.izibuko elipheleleyoivalvu (okanye egcwele imbobo) inomngxuma olingana nombhobho, nto leyo ebangela ukuba kungabikho mqobo wokuhamba kwamanzi.izibuko elincitshisiweyoivalvu inomngxuma omncinci. Oku kulungile kwiimeko ezininzi kwaye kwenza ivalvu ibe ncinci kwaye ifikeleleke lula.

Ukuthelekisa Iintlobo Ezine Eziphambili

Uyazi njani ukuba ivalvu yebhola ivuliwe okanye ivaliwe?

Uza kusika umbhobho, kodwa ngaba uqinisekile ukuba ivalvu ivaliwe? Impazamo nje elula apha inokukhokelela kwingxolo enkulu, umonakalo wamanzi, okanye nokwenzakala.

Ungabona ukubaivalvu yebholaivuliwe okanye ivaliwe ngokujonga indawo yesiphatho xa ithelekiswa nombhobho. Ukuba isiphatho sihambelana nombhobho, ivalvu ivulekile. Ukuba isiphatho sithe nkqo (senza imilo "ye-T"), ivalvu ivaliwe.

Olu lolona lwazi lusisiseko nolubalulekileyo kuye nabani na osebenza ngeevalvu zebhola. Indawo yesiphatho sisalathisi esibonakalayo ngqo sendawo yebhola. Olu phawu lulula loyilo yenye yezona zizathu ziphambili zokuba iivalvu zebhola zithandwe kangaka. Akukho kuqikelela. Ndakha ndeva ibali elivela kuBudi malunga nomsebenzi wolondolozo oselula kwiziko owayengxamile. Wajonga ivalvu waza wacinga ukuba icinyiwe, kodwa yayiyivalvu yesango endala eyayifuna ukujika izihlandlo ezininzi, kwaye wayengenakukwazi ukubona imeko yayo ngokubonakalayo. Wenza ukusika waza wagcwalisa igumbi. Ngevalvu yebhola, loo mpazamo phantse ayinakwenzeka. Isenzo sokujika kwekota kunye nendawo yesiphatho ecacileyo zibonelela ngempendulo ekhawulezileyo necacileyo: kumgca "kuvuliwe," ngaphesheya "kuvaliwe." Olu phawu lulula sisixhobo esinamandla sokhuseleko.

Yintoni umahluko phakathi kweevalvu zebhola zohlobo lwe-T kunye ne-L?

Udinga ukuguqula indlela ohamba ngayo, ungayeki nje. Uku-odola ivalvu eqhelekileyo akuzukusebenza, kwaye uku-odola ivalvu enezikhusi ezininzi ezingalunganga kunokuthumela amanzi kwindawo engafanelekanga.

Uhlobo lwe-T kunye nohlobo lwe-L zibhekisa kwimo yembobo ebholeni yevalvu eneendlela ezintathu. Uhlobo lwe-L lunokujika ukuhamba ukusuka kwindawo enye yokungena ukuya kwenye yeeplagi ezimbini. Uhlobo lwe-T lungenza okufanayo, kwaye lunokuqhagamshela zonke iiports ezintathu kunye.

Le yinto eqhelekileyo ebangela ukudideka kubantu abathenga ivalvu yabo yokuqala eneendlela ezintathu. Makhe sicinge ngevalvu enezikhumulo ezintathu: ezantsi, ekhohlo, nasekunene.Izibuko le-L^[5]Ivalvu inomphetho ogobileyo we-90-degree ebhobozwe ebholeni. Kwindawo enye, idibanisa i-port esezantsi ne-port ekhohlo. Ngokujika kwekota, idibanisa i-port esezantsi ne-port esekunene. Ayinakuze izidibanise zontathu. Ifanelekile ekuguquleni ukuhamba ukusuka kumthombo omnye ukuya kwiindawo ezimbini ezahlukeneyo.Izibuko le-T^[6]Ivalvu inomfanekiso "we-T" ogqojozwe ebholeni. Ineendlela ezininzi. Ingadibanisa ezantsi ngasekhohlo, ezantsi ngasekunene, okanye ingadibanisa ekhohlo ngasekunene (idlula ezantsi). Okubalulekileyo kukuba, ikwanendawo edibanisa zonke iiport ezintathu ngaxeshanye, ivumela ukuxuba okanye ukujika. Iqela likaBudi lihlala libuza umthengi: “Ngaba kufuneka udibanise ukuhamba kwamanzi, okanye utshintshe nje phakathi kwawo?” Impendulo ibaxelela ngoko nangoko ukuba kufuneka i-T-Port okanye i-L-Port.

Izakhono ze-L-Port vs. T-Port

Yintoni umahluko phakathi kwe-trunnion kunye ne-floating ball valve?

Inkqubo yakho isebenza phantsi koxinzelelo oluphezulu. Ukuba ukhetha ivalvu yebhola eqhelekileyo, uxinzelelo lunokwenza kube nzima ukuyijika okanye lubangele ukuba izitywini zingasebenzi kakuhle ngokuhamba kwexesha.

Kwivalvu edadayo, ibhola "iyadada" phakathi kwezihlalo, ityhalwa luxinzelelo. Kwivalvu ye-trunnion, ibhola ibotshelelwe ngoomatshini ngumngxuma ophezulu nosezantsi (i-trunnion), ofunxa uxinzelelo kwaye unciphise uxinzelelo kwizihlalo.

Umahluko umalunga nokulawula amandla. Ngokwesiqheloivalvu yebhola edadayo^[7], xa ivalvu ivaliwe, uxinzelelo oluphezulu lutyhala ibhola ngamandla kwisihlalo esisezantsi. La mandla enza isitywino. Nangona isebenza kakuhle, oku kudala ukungqubana okuninzi, okunokwenza ivalvu ibe nzima ukuyijika, ingakumbi ngobukhulu obukhulu okanye phantsi koxinzelelo oluphezulu.ivalvu efakwe kwi-trunnion^[8]iyayisombulula le ngxaki. Ibhola iqiniswe endaweni yayo zizixhobo zokuxhasa i-trunnion, ukuze ingatyhalwa yindlela ehamba ngayo amanzi. Uxinzelelo endaweni yoko lutyhala izihlalo ezine-spring-loaded kwibhola engashukumiyo. Olu yilo lufunxa amandla amakhulu, nto leyo ebangela ukuba i-torque ibe sezantsi kakhulu (kulula ukuyijika) kwaye ihlale ixesha elide. Yingakho kwiimveliso zoshishino ezinoxinzelelo oluphezulu, ingakumbi kwishishini leoyile negesi, ii-trunnion valves ziyindlela efunekayo. Kwiinkqubo ezininzi ze-PVC, uxinzelelo luphantsi ngokwaneleyo ukuba i-floating valve isebenze ngokugqibeleleyo.

Ukudada vs. iTrunnion Intloko-ukuya-entloko

Isiphelo

Iintlobo ezine eziphambili zeevalvu—ezidadayo, ezirhuqwayo, ezigcweleyo, nezincinciweyo—zibonelela ngeendlela ezahlukeneyo zokufaka isicelo. Ukwazi umahluko phakathi kwazo, kunye neentlobo ezikhethekileyo ezifana ne-L-port kunye ne-T-port, kuqinisekisa ukuba ukhetha ngokugqibeleleyo.