I-valve yesangokuwumkhiqizo wenguquko yezimboni. Nakuba eminye imiklamo yamavalvu, njengamavalvu omhlaba kanye namavalvu epulaki, ibilokhu ikhona isikhathi eside, amavalvu esango abe sesimweni esivelele embonini amashumi eminyaka, futhi muva nje anikeze isabelo esikhulu semakethe kumiklamo yamavalvu ebhola kanye namavalvu e-butterfly.

Umehluko phakathi kwe-valve yesango ne-valve yebhola, i-valve yepulagi ne-valve ye-butterfly ukuthi into yokuvala, ebizwa ngokuthi i-disc, i-gate noma i-occluder, iphakama phansi kwesiqu se-valve noma i-spindle, ishiya umzila wamanzi bese ingena phezulu kwe-valve, ebizwa ngokuthi i-bonnet, bese ijikeleza nge-spindle noma i-spindle ngokujika okuningana. Lawa ma-valve avuleka ngokunyakaza okuqondile aziwa nangokuthi ama-multi turn noma ama-linear valve, ngokungafani nama-quarter turn valve, ane-stem ejikeleza ama-degree angu-90 futhi angavamile ukuphakama.

Amavalvu esango atholakala ngezinto eziningi ezahlukene kanye nezilinganiso zokucindezela. Ahluka ngobukhulu kusukela ku-NPS elingana nesandla sakho ½ intshi kuya ku-NPS yeloli elikhulu 144 intshi. Amavalvu esango aqukethe ama-castings, ama-forgings, noma izingxenye ezenziwe ngokushisela, yize umklamo wokushisisa ulawula.

Esinye sezici ezifiseleka kakhulu ngama-valve esango ukuthi angavulwa ngokugcwele ngaphandle kokuvinjelwa okuncane noma ukungqubuzana emigodini yokugeleza. Ukumelana kokugeleza okunikezwa yi-valve yesango evulekile kucishe kufane nokwengxenye yepayipi enobukhulu obufanayo be-port. Ngakho-ke, ama-valve esango asacatshangelwa kakhulu ekuvimbeni noma ekuvuleni/ekuvaleni. Kwezinye izincazelo zama-valve, ama-valve esango abizwa ngokuthi ama-valve e-globe.

Amavalvu esango ngokuvamile awafanele ukulawula ukugeleza noma ukusebenza kunoma iyiphi indlela ngaphandle kokuvula ngokuphelele noma ukuvala ngokuphelele. Ukusebenzisa ivalvu yesango evulekile kancane ukujikijela noma ukulawula ukugeleza kungalimaza ipuleti levalvu noma indandatho yesihlalo sevalvu, ngoba endaweni yokugeleza evulekile kancane ebangela ukuphazamiseka, izindawo zesihlalo sevalvu zizoshayisana.

Isitayela se-valve yesango

Uma ubheka ngaphandle, ama-valve amaningi esango abukeka afana. Kodwa-ke, kunezindlela eziningi ezahlukene zokuklama. Ama-valve amaningi esango aqukethe umzimba kanye ne-bonnet, equkethe into yokuvala ebizwa ngokuthi i-disc noma isango. Into yokuvala ixhunywe esiqwini esidlula e-bonnet bese ekugcineni ixhunywe esondweni lesandla noma kwenye idrayivu ukuze isebenze isiqu. Ingcindezi ezungeze isiqu se-valve ilawulwa ukupakisha okucindezelwa endaweni yokupakisha noma ekamelweni.

Ukuhamba kwepuleti le-valve yesango esiqwini se-valve kunquma ukuthi isiqu se-valve siyaphakama noma siyakrufulula yini epuletini le-valve ngesikhathi sokuvulwa. Lokhu kusabela kuchaza nezitayela ezimbili eziyinhloko ze-stem/disc zama-valve esango: isiqu esikhuphukayo noma isiqu esingaphumi (i-NRS). Isiqu esikhuphukayo yisitayela sokuklama i-stem/disc esithandwa kakhulu emakethe yezimboni, kuyilapho isiqu esingaphumiyo sesithandwa kakhulu yimboni yemisebenzi yamanzi kanye nepayipi. Ezinye izinhlelo zokusebenza zemikhumbi ezisasebenzisa ama-valve esango futhi ezinezikhala ezincane nazo zisebenzisa isitayela se-NRS.

Umklamo we-stem/bonnet ovame kakhulu kuma-valve ezimboni yintambo yangaphandle kanye ne-yoke (OS&Y). Umklamo we-OS&Y ufaneleka kakhulu ezindaweni ezigqwalisayo ngoba izintambo zitholakala ngaphandle kwendawo yokuvala uketshezi. Uhlukile kweminye imiklamo ngokuthi isondo lesandla linamathele ebhushini elingaphezulu kwejoka, hhayi esiqwini ngokwaso, ukuze isondo lesandla lingaphakami lapho ivalvu ivuliwe.

Ukuhlukaniswa kwemakethe yama-valve esango

Nakuba eminyakeni engama-50 edlule, ama-valve ajikelezayo e-angle kwesokudla abe nengxenye enkulu emakethe yama-valve esango, ezinye izimboni zisathembele kakhulu kuwo, okuhlanganisa nemboni kawoyela negesi. Nakuba ama-valve ebhola ethuthuke kakhulu emipayipini yegesi yemvelo, ama-valve kawoyela ongahluziwe noma oketshezi aseyindawo yama-valve esango ahleli ndawonye.

Uma kukhulunywa ngobukhulu obukhulu, ama-valve esango aseyisinqumo esiyinhloko sezinhlelo zokusebenza eziningi embonini yokucwenga. Ukuqina komklamo kanye nezindleko eziphelele zobunikazi (kufaka phakathi ukonga kokugcinwa) yizinto ezifiselekayo zalo mklamo wendabuko.

Ngokuphathelene nokusetshenziswa, izinqubo eziningi zokuhlanza zisebenzisa amazinga okushisa aphezulu kunezinga lokushisa lokusebenza eliphephile leTeflon, okuyizinto eziyinhloko zokuhlala zamavalvu ebhola antantayo. Amavalvu ebhabhathane asebenza kahle kakhulu namavalvu ebhola avaliwe ngensimbi aseqala ukusetshenziswa kakhulu ekusetshenzisweni kokuhlanza, yize izindleko zawo zobunikazi zivame ukuba phezulu kunezamavalvu esango.

Imboni yezitshalo zamanzi isaphethwe amavalvu esango lensimbi. Ngisho nasezisetshenzisweni ezimboziwe, ashibhile futhi ahlala isikhathi eside.

Ukusetshenziswa kwemboni yamandlaamavalvu esango le-alloykwezicelo ezifaka ukucindezela okuphezulu kakhulu kanye namazinga okushisa aphezulu kakhulu. Nakuba amanye ama-valve amasha e-globe ohlobo lwe-Y kanye nama-valve ebhola ahlala phansi ensimbi aklanyelwe insizakalo yokuvimba atholakale esitshalweni sikagesi, ama-valve esango asathandwa ngabaklami bezitshalo kanye nabaqhubi.