I-PVC (i-polyvinyl chloride) kunye ne-UPVC (i-polyvinyl chloride engaxutywanga) zizinto ezisetyenziswa ngokubanzi ekwenzeni izixhobo zevalve ngenxa yokuqina kwazo kunye nokuchasana nokubola.

Ezi zinto zisetyenziswa ngokuqhelekileyo ekuveliseni iivalve zebhola zePVC, eziyinxalenye ebalulekileyo kwiinkqubo zemibhobho kunye nezoshishino. Ukuqonda umgaqo wokusebenza kweevalvu zebhola zePVC kubalulekile ekuqinisekiseni ukusebenza kwazo ngokufanelekileyo.

Iivalvu zebhola zePVC ziyilwe ngento engqukuva engqukuva, edla ngokubizwa ngokuba yibhola, ebekwe ngaphakathi kumzimba wevalve. Ibhola inomngxuma okanye izibuko kwiziko elivumela ukulawulwa kokuhamba xa ihambelana ne-inlet kunye ne-outlet port yevalve. Xa ibhola ijikeleziswa ngama-90 degrees, umngxuma uba yi-perpendicular to flow, ngokufanelekileyo ukuvala ukuhamba.

Izinto eziphambili zevalve yebhola yePVC ziquka ibhola, umzimba wevalvu, isiqu, isibambo, kunye nezitywina. Umzimba wevalvu wenziwe ngePVC okanye i-UPVC, ukubonelela ngokumelana neekhemikhali kunye namandla omatshini. Isiqu sidityaniswe nebhola kwaye sinoxanduva lokujikeleza ibhola ukulawula ukuhamba. Isibambo sivumela ukusebenza ngesandla, okwenza abasebenzisi bavule okanye bavale ivalve njengoko kufuneka. Izitywina, ezihlala zenziwe ngeplastiki okanye izinto ze-elastomeric, ziqinisekisa isitywina esiqinileyo xa i-valve ivaliwe, ukukhusela ukuvuza.

Umgaqo osebenzayo wevalve yebhola ye-PVC isekelwe ekujikelezeni kwebhola ukuvumela okanye ukuvala ukuhamba kwamanzi. Xa isiphatho sijikwa, isiqu sijikelezisa ibhola ngaphakathi komzimba wevalvu, ulungelelanisa umngxuma kunye neendawo zokungena kunye nokuphuma ukuze kuvumeleke ukuhamba okanye ukubeka umngxuma ojonge kwizibuko ukumisa ukuhamba.

Iivalvu zebhola zePVC zisetyenziswa ngokubanzi kwizicelo ezahlukeneyo, kubandakanya unyango lwamanzi, ukusetyenzwa kweekhemikhali, iinkqubo zokunkcenkceshela, kunye nemibhobho yamanzi kwimizi-mveliso. Uyilo lwabo olulula kodwa olusebenzayo, oludityaniswa nokuqina kwePVC kunye ne-UPVC, lubenza babe lukhetho oludumileyo lokulawula ukuhamba kolwelo kunye neegesi kuluhlu olubanzi lwamashishini.

Ukuqukumbela, umgaqo osebenzayo wePVC iivalvu zebhola ujikeleza ukujikeleza kwento evalekileyo yokuvalwa kwe-spherical ukulawula ukuhamba kwamanzi. Ukusetyenziswa kwezixhobo ze-PVC kunye ne-UPVC ekwakhiweni kwezi zivalo ziqinisekisa ukuhlala kwazo ixesha elide kunye nokuthembeka kwiinkqubo ezahlukeneyo zoshishino kunye nemibhobho.