Kungani i-valve yokumisa kufanele ibe nendawo ephansi yokungena kanye nendawo ephezulu?

Kungani kufanelei-valve yokumisaube nendawo yokungena ephansi nephezulu?

　　i-valve yokumisa, eyaziwa nangokuthi i-stop valve, i-valve yokuvala ngempoqo, okuwuhlobo lwevalvu yokumisa. Ngokwendlela yokuxhuma, ihlukaniswe yaba izinhlobo ezintathu: uxhumano lwe-flange, uxhumano lwentambo, nokuxhumeka kwe-welding.

Ivalvu yaseChina i-“Sanhua” yake yabeka ukuthi indawo yokugeleza yevalvu yokumisa kufanele ikhethwe ukusuka phezulu kuye phansi, ngakho-ke kukhona indlela lapho ufaka.

Lolu hlobo lwe-valve yokuvala i-valve yokuvala lufaneleka kakhulu ukuvimba noma ukuqondisa nokudonsa. Ngenxa yokuthi ukuvulwa noma ukuvala ukushaywa kwesiqu se-valve yalolu hlobo lwe-valve kufushane, futhi kunomsebenzi wokuvimbela onokwethenjelwa kakhulu, futhi ngenxa yokuthi ukuguqulwa kwembobo yesihlalo se-valve kuhambisana ngokuqondile nokushaywa kwe-valve disc, kungukuthi. ilungele kakhulu ukulawulwa kokugeleza.

I-valve yokumisa iklanyelwe ukungena okuphansi nokuphuma okuphezulu, inhloso ukwenza ukumelana nokugeleza kuncane futhi ulondoloze umzamo lapho uvula i-valve. Lapho i-valve ivaliwe, i-gasket phakathi kwe-valve casing kanye nesembozo se-valve kanye nokupakisha eduze kwesiqu se-valve akucindezelwe, futhi umphumela wokungavezwa ukucindezela okuphakathi kanye nezinga lokushisa isikhathi eside kungandisa impilo yesevisi futhi kunciphise. amathuba okuvuza. Uma kungenjalo, ukupakisha kungashintshwa noma kwengezwe lapho i-valve ivaliwe, ekulungele ukulungiswa.

Akuwona wonke ama-valve embulunga ane-inlet ephansi kanye ne-outlet ephezulu. Ngokuvamile, kunzima ukuvala i-valve lapho ukhetha ukungena okuphansi nokuphuma okuphezulu ngaphansi kobubanzi obukhulu nokucindezela okukhulu. Ukucindezela kulula ukuguqula nokusonteka, okuthinta ukuphepha nokuvalwa kwe-valve; uma i-inlet ephezulu kanye nesimo esiphansi sikhethiwe, ububanzi be-valve stem bungaba buncane, obuzophinde busindise izindleko ezincane kumkhiqizi nomsebenzisi.