Kwiminyaka yakutshanje, ingqwalasela engakumbi ihlawulwe kwinkalo yokhuseleko lwezixhobo zokuvelisa kumazwe angaphandle.Ngale ndlela, into yokhuseleko lwesixhobo iphuculwe kakhulu, kwaye inokuthintela ngokupheleleyo ukwenzeka kweengozi zokhuseleko ezibangelwa kukusebenza okungalunganga.

Iukuvalwa kwevalvuyeskimu soyilo siyingqayizivele kwinqanaba langoku.Oku kuvalwa kwevalve kusetyenziswa ikakhulu sisiphatho sevalve esisigxina.Esinye isiphelo sokuvala ivalve sidityaniswe nebholiti yeankile yebhonethi.Indlela yokudibanisa yenziwe nge-threaded 2 nuts, qhagamshela ikhonkco lokuqhuba nge-pin phakathi, jija isiphelo esinye kwibhowuthi ye-ankile yebhonethi yezibonelelo zayo ezixhasayo (intambo ye-nut ephothiweyo ihambelana nocingo lwebholithi ye-anchor yebhonethi), kunye esinye isiphelo inomanyano intshi intambo idityaniswe nut of intambo, kwaye umqheba ivelufa ujikelezwe ngetsheyini drive.Amacala amabini ekhonkco lokuqhuba adityaniswe kunye nomanyano lwentambo ye-intshi kunye nezikhonkwane, kwaye isibambo kunye nesigqubuthelo sevalve zixhunyiwe ngokuthe nkqo.Indlela yokudibanisa ukuba i-valve ifunyenwe ivaliwe, i-valve ayikwazi ukuvulwa ngaphandle kokuba umanyano oluphakathi lukhululiwe okanye lonakaliswe.

Xa ulungisa okanye uvula kwaye uvala i-valve, kwanele ukuguqula umanyano phakathi.Izivalo zevalvu zisetyenziswa ikakhulu kwezinye iivalvu ezihlala zivaliwe kwaye zivulekile, kwaye ezinye iivalvu ezivulwa kwaye zivalwe ngexesha lokulondolozwa, kunye nezinye iivalvu ekufuneka zitshixiwe nazo zinokusetyenziswa.Isitshixo sinokutshixa iivalvu ezi-2, ezisikhusela ikakhulu ekubangeleni iingozi zokhuseleko ngenxa yeempazamo zokusebenza.

Ingqinwe ngokwemisebenzi eyenziwayo, iyasebenza kwaye ikwagcina izinto ezininzi ezingasetyenziswanga.Ukuvalwa kwevalvuzisetyenzisiwe kumaziko ombane eenkampani ezininzi, kwaye eyona mpembelelo intle kakhulu.Ngokuqhelekileyo isetyenziselwa ukulungiswa kweplanti yamandla kunye nexesha lokugcinwa ukukhusela iimpazamo zokusebenza kunye nokuqinisekisa ukusebenza ngokukhuselekileyo koomatshini kunye nezixhobo.