Amavalvu ebhola anezingcezu ezimbilikuyisinqumo esidumile ezisetshenziswayo eziningi zezimboni nezentengiselwano, ikakhulukazi lapho kulawulwa ukugeleza koketshezi. Lawa ma-valve ayi-uhlobo lwevalvu yokujika kwekotaesebenzisa ibhola elingenalutho, elinezimbobo, nelijikelezayo ukulawula ukugeleza kwamanzi, umoya, uwoyela, kanye nolunye uketshezi oluhlukahlukene. Kuma-valve ebhola anezicucu ezimbili, i-PVC iyinto evamile ngenxa yokuqina kwayo kanye nokumelana nokugqwala.

Umsebenzi wevalvu yebhola enezicucu ezimbili ulula kodwa uyasebenza. Uma isibambo sevalvu siphendulwa, ibhola elingaphakathi kwevalvu liyajikeleza ukuvumela noma ukuvimbela ukugeleza koketshezi. Lokhu kuyenza ifaneleke kakhulu ekusetshenzisweni okudinga ukulawulwa okunembile kokugeleza. Ivalvu yebhola enezicucu ezimbili nayo yenzelwe ukuba kube lula ukuyinakekela nokuyilungisa, okwenza kube yisisombululo esingabizi kakhulu ezimbonini eziningi.

Kuma-valve ebhola amabili e-PVC, le nto inezinzuzo eziningi. I-PVC (noma i-polyvinyl chloride) iyinto ye-thermoplastic eyaziwa ngokumelana kwayo okuhle kwamakhemikhali, okwenza ibe yindawo ekahle kakhulu yokusetshenziswa lapho ama-valve ehlangana khona noketshezi oluhlukahlukene. Ngaphezu kwalokho,I-PVC ilula futhi kulula ukuyifaka nokuyiphathaFuthi ihlala isikhathi eside kakhulu, okwenza kube ukukhetha okuhlala isikhathi eside nokwethembekile kwama-valve ebhola anezingcezu ezimbili.

Omunye wemisebenzi ebalulekile yevalvu yebhola enezicucu ezimbili ukunikeza ukuvala okuqinile. Ukwakheka kwevalvu kudala uphawu oluvikelekile uma luvaliwe, okuvimbela noma yikuphi ukuvuza koketshezi olulawulwayo. Lokhu kubalulekile ekusetshenzisweni lapho ukuvuza kubiza kakhulu noma kuyingozi. Izinto ze-PVC ezisetshenziswa kumavalvu ebhola anezicucu ezimbili ziqinisekisa ukuthi ivalvu ihlala ivaliwe isikhathi eside, ngisho noma ivezwa kumakhemikhali aqinile noma amazinga okushisa aphezulu.

Esinye isici esibalulekile sevalvu yebhola enezicucu ezimbili yikhono lokulawula ukugeleza koketshezi. Ngokuphendula nje isibambo, izinga lokugeleza lingalungiswa ukuze lihlangabezane nezidingo ezithile zesicelo. Leli zinga lokulawula libalulekile ezimbonini eziningi, kusukela ezitshalweni zokuhlanza amanzi kuya ezindaweni zokuhlanza ngamakhemikhali. Izinto ze-PVC ezisetshenziswa kumavalvu ebhola anezicucu ezimbili ziqinisekisa ukuthi zingahlangabezana nezidingo zokulawula ukugeleza kwezicelo ezahlukahlukene.

Amavalvu ebhola anezicucu ezimbili nawo anenzuzo yokuba lula ukuwahlukanisa nokuyinakekela. Lokhu kuyiqiniso ikakhulukazi kumavalvu ebhola anezicucu ezimbili ze-PVC, lapho izakhiwo zale nto zilula futhi zihlala isikhathi eside zenza imisebenzi yokulungisa nokulungisa ibe lula futhi ingabizi kakhulu. Lokhu, kanye namakhono ayo okuvala ngokuqinile kanye nokulawula ukugeleza, kwenza ivalvu yebhola enezicucu ezimbili ze-PVC ibe ukukhetha okuthembekile nokusebenzayo kwezinhlelo zokusebenza ezahlukahlukene.

Ngamafuphi, umsebenzi wevalvu yebhola enezicucu ezimbili (ikakhulukazi eyenziwe nge-PVC) ukunikeza ukuvala okuqinile, ukulawula ukugeleza koketshezi, futhi kube lula ukuyinakekela. Uma kulawulwa ukugeleza kwamanzi, umoya noma amakhemikhali, amavalvu ebhola anezicucu ezimbili ayisinqumo esiguquguqukayo nesithembekile ezimbonini eziningi. Umklamo wayo olula kodwa osebenzayo kanye nezinzuzo zezinto ze-PVC kuyenza ibe yisisombululo esifanele sezinhlelo zokusebenza ezahlukahlukene.