Ufaka umugqa omusha wamanzi bese uthatha ivalvu ye-PVC. Kodwa uma ungawazi umkhawulo wokucindezela kwayo, usengozini yokuqhuma okukhulu, isikhukhula esikhulu, kanye nesikhathi esibizayo sokungasebenzi kohlelo.

I-valve yebhola ye-PVC ejwayelekile ye-Schedule 40 ivame ukulinganiselwa ukuthi ikwazi ukusingatha ubuningi be-150 PSI (Amaphawundi nge-Square Inch) ku-73°F (23°C). Lesi silinganiso sokucindezela sincipha kakhulu njengoba izinga lokushisa lamanzi likhuphuka, ngakho-ke kubalulekile ukuhlola imininingwane yomenzi.

Leyo nombolo, i-150 PSI, iyimpendulo elula. Kodwa impendulo yangempela iyinkimbinkimbi kakhulu, futhi ukuyiqonda kuyisihluthulelo sokwakha uhlelo oluphephile noluthembekile. Ngivame ukuxoxa ngalokhu noBudi, umphathi wokuthenga e-Indonesia. Uqeqesha ithimba lakhe ukuthi lingabuzi amakhasimende ukuthi “yimuphi umfutho owudingayo?” kodwa nokuthi “lingakanani izinga lokushisa?” nokuthi “uyimisa kanjani indlela yokugeleza?” Iphampu ingadala ukuphakama komfutho ngaphezu kwesilinganiso sesistimu. Ivalvu iyingxenye eyodwa nje yesistimu yonke. Ukwazi ukuthi ingabhekana nomfutho ongakanani akukhona nje ukufunda inombolo; kumayelana nokuqonda ukuthi uhlelo lwakho luzoziphatha kanjani ezweni langempela.

Iyini izinga lokucindezela kwevalvu ye-PVC?

Ubona u-“150 PSI” ephrintiwe kuvalvu, kodwa lokho kusho ukuthini ngempela? Ukuyisebenzisa ezimweni ezingalungile kungabangela ukuthi yehluleke, noma ngabe ingcindezi ibonakala iphansi.

Isilinganiso sokucindezela sevalvu ye-PVC, ngokuvamile i-150 PSI yeShejuli 40, yingcindezi yayo yokusebenza ephephile ephezulu ekushiseni kwegumbi. Njengoba izinga lokushisa likhuphuka, i-PVC iyathamba futhi amandla ayo okuphatha ingcindezi ehla kakhulu.

Cabanga ngesilinganiso sokucindezela njengamandla aso esimweni esifanele. Ezingeni lokushisa elikhululekile legumbi elingu-73°F (23°C), ivalvu ejwayelekile ye-PVC emhlophe iqinile futhi iqinile. KodwaI-PVC iyi-thermoplastic, okusho ukuthi iyathamba uma ishiswa. Lona umqondo obaluleke kakhulu okufanele uwuqonde: kumele "unciphise" ingcindezi uma amazinga okushisa aphezulu. Isibonelo, ku-100°F (38°C), lelo valve le-PSI elingu-150 lingase libe liphephile kuphela kuze kufike ku-110 PSI. Ngesikhathi ufika ku-140°F (60°C), isilinganiso salo esiphezulu sesifinyelele cishe ku-30 ​​PSI. Yingakho i-PVC ejwayelekile ingeyamanzi abandayo kuphela. Uma amazinga okushisa aphezulu noma aphezulu kancane, ungabhekaI-PVC yeShejuli 80(ngokuvamile okumpunga okumnyama), okunezindonga ezijiyile kanye nesilinganiso sokucindezela okuphezulu kokuqala.

Isilinganiso Sokucindezela se-PVC vs. Izinga Lokushisa

Uyini umkhawulo wokucindezela kwevalvu yebhola?

Uyazi ukuthi ingcindezi engaguquki yesistimu yakho ingaphansi komkhawulo ngokuphephile. Kodwa ukuvalwa kwevalvu ngokuzumayo kungadala ukuphakama kwengcindezi okudlula lowo mkhawulo, okubangela ukuqhuma okusheshayo.

Umkhawulo wokucindezela oshiwoyo ungowengcindezi engashintshi, engashintshi. Lo mkhawulo awubheki amandla aguqukayo afanaisando samanzi, umfutho okhuphukayo ongazelelwe ongaphula kalula ivalvu elinganiswe ngomfutho ophakeme kakhulu.

I-Water hammer iwumbulali othule wezingxenye zamapayipi. Cabanga ngepayipi elide eligcwele amanzi elihamba ngokushesha. Uma uvala i-valve, wonke lawo manzi ahambayo kufanele ame ngokushesha. Umfutho udala i-shock wave enkulu ebuyela emuva ngepayipi. Lokhu kuphakama kokucindezela kungaba izikhathi ezi-5 kuya kweziyi-10 kunokucindezela okuvamile kohlelo. Uhlelo olusebenza ku-60 PSI lungabhekana nokuphakama kwe-600 PSI okwesikhashana. Ayikho i-PVC ball valve ejwayelekile engamelana nalokho. Ngihlala ngitshela uBudi ukuthi akhumbuze amakhasimende akhe angonkontileka ngalokhu. Uma i-valve yehluleka, kulula ukusola umkhiqizo. Kodwa kaningi, inkinga iwumklamo wohlelo ongabheki i-water hammer. Ukuvimbela okungcono ukuvala ama-valve kancane. Ngisho nange-valve yebhola ephenduka ngekota, ukusebenzisa isibambo kahle isikhathi sesekhondi noma emibili esikhundleni sokusivala kwenza umehluko omkhulu.

Ingakanani ingcindezi engayimelana ne-PVC?

Ukhethe ivalvu efanele, kodwa kuthiwani ngepayipi? Uhlelo lwakho luqinile kuphela uma luxhumeke kabi, kanti ukwehluleka kwepayipi kubi njengokuhluleka kwevalvu.

Inani lengcindezi i-PVC engamelana nayo lincike “esimisweni” sayo noma ukujiya kodonga. Ipayipi le-PVC elijwayelekile le-Schedule 40 linezilinganiso zokucindezela eziphansi kunepayipi le-Schedule 80 elinodonga olujiyile, elinomkhakha wezimboni.

Kuyiphutha elivamile ukugxila kuphela esilinganisweni sevalvu. Kumelwe uhambisane nezingxenye zakho. Ipayipi le-Schedule 40 elingamasentimitha angu-2, ipayipi elimhlophe elivamile olibona yonke indawo, livame ukulinganiselwa cishe ku-140 PSI. Ipayipi le-Schedule 80 elingamasentimitha angu-2, elinezindonga ezijiyile kakhulu futhi ngokuvamile limpunga omnyama, lilinganiselwe ku-200 PSI. Awukwazi ukwandisa umthamo wokucindezela kohlelo lwakho ngokusebenzisa ivalvu eqinile. Uma ufaka ivalvu ye-Schedule 80 (elinganiswe ku-240 PSI) epayipini le-Schedule 40 (elinganiswe ku-140 PSI), ukucindezela okuphezulu okuphephile kohlelo lwakho kuseyi-140 PSI kuphela. Ipayipi iba yisixhumanisi esibuthakathaka kakhulu. Kunoma yiluphi uhlelo, kufanele ukhombe isilinganiso sokucindezela sazo zonke izingxenye—amapayipi, izinto zokufaka, namavalvu—futhi uklame uhlelo lwakho eduze kwengxenye elinganiswe kancane.

Ukuqhathaniswa Kweshejuli Yamapayipi (Isibonelo: I-PVC engamasentimitha angu-2)

Ingabe ama-valve ebhola e-PVC alungile?

Ubheka ivalvu yepulasitiki elula bese ucabanga ukuthi ishibhile. Ungayethemba ngempela le ngxenye engabizi ukuthi izoba yingxenye ethembekile ohlelweni lwakho lwamanzi olubalulekile?

Yebo, ikhwalithi ephezuluAmavalvu ebhola le-PVCzinhle kakhulu ngenhloso yazo. Inani lazo alikho emandleni amakhulu, kodwa ekugomeni kwazo ngokuphelele ekugqwaleni, okuzenza zithembeke kakhulu kunensimbi ezisetshenziswayo eziningi.

Umbono wokuthi “ishibhile” uvela ekuqhathaniseni i-PVC nensimbi. Kodwa lokhu akulona iphuzu. Ezimweni eziningi zokusetshenziswa kwamanzi, ikakhulukazi kwezolimo, ekufuyweni kwezinhlanzi, noma ezinhlelweni zamachibi, ukugqwala kuyimbangela eyinhloko yokwehluleka. Ivalvu yethusi noma yensimbi izogqwala futhi ibambe ngokuhamba kwesikhathi. Ivalvu ye-PVC esezingeni eliphezulu, eyenziwe nge-resin eyi-100% emsulwa enezihlalo ze-PTFE ezibushelelezi kanye nama-O-rings angafuneki, ngeke isebenze kahle iminyaka eminingi endaweni engabhubhisa insimbi. I-Budi inqoba amakhasimende angabazayo ngokufaka kabusha uhlaka lombuzo. Umbuzo awukhona ukuthi “ingabe ipulasitiki ilungile ngokwanele?” Umbuzo uwukuthi “ingabe insimbi ingasinda emsebenzini?” Ukuze kulawulwe amanzi abandayo, ikakhulukazi lapho kukhona amakhemikhali noma usawoti, ivalvu ye-PVC eyenziwe kahle akuyona nje ukukhetha okuhle; iyisinqumo esihlakaniphile, esithembekile, futhi esingabizi kakhulu isikhathi eside.

Isiphetho

I-valve yebhola ye-PVC ingaphatha i-150 PSI ekushiseni kwegumbi. Inani layo langempela lisekumelaneni nokugqwala, kodwa njalo cabanga ngokushisa kanye nesando samanzi ukuze kube nohlelo oluphephile noluhlala isikhathi eside.