Ufaka ulayini omusha wamanzi futhi ubambe ivalvu ye-PVC. Kodwa uma ungawazi umkhawulo wayo wengcindezi, uzifaka engcupheni yokuqhuma okuyinhlekelele, isikhukhula esikhulu, kanye nesikhathi sokuphumula sesistimu esibizayo.

I-valve yebhola ye-Schedule 40 ye-PVC evamile ngokuvamile ikalwa ukuze isingathe umkhawulo we-150 PSI (Amakhilogremu Kuyintshi yesikwele) ku-73°F (23°C). Lesi silinganiso sokucindezela sehla kakhulu njengoba izinga lokushisa lamanzi likhuphuka, ngakho-ke kubalulekile ukuhlola imininingwane yomkhiqizi.

Leyo nombolo, 150 PSI, iyimpendulo elula. Kodwa impendulo yangempela iyinkimbinkimbi kakhulu, futhi ukuqonda kuyisihluthulelo sokwakha uhlelo oluphephile, oluthembekile. Ngivame ukuxoxa ngalokhu no-Budi, umphathi wokuthenga e-Indonesia. Uqeqesha iqembu lakhe ukuthi libuze amakhasimende hhayi nje ukuthi “udinga yiphi ingcindezi?” kodwa futhi “lithini izinga lokushisa?” futhi “umisa kanjani ukugeleza?” Iphampu ingadala ukukhuphuka komfutho ngaphezu kwesilinganiso sesistimu. I-valve iyingxenye eyodwa nje yohlelo lonke. Ukwazi ukuthi ingakanani ingcindezi engabhekana nayo akukhona nje ngokufunda inombolo; kumayelana nokuqonda ukuthi uhlelo lwakho luzoziphatha kanjani emhlabeni wangempela.

Siyini isilinganiso sokucindezela kwevalve ye-PVC?

Ubona "150 PSI" ephrintiwe ku-valve, kodwa lokho kusho ukuthini ngempela? Ukuyisebenzisa ezimweni ezingalungile kungabangela ukuthi ihluleke, ngisho noma ingcindezi ibonakala iphansi.

Isilinganiso sokucindezela kwe-valve ye-PVC, ngokuvamile engu-150 PSI yeSheduli 40, ingcindezi yayo yokusebenza ephephile ephezulu ekushiseni kwegumbi. Njengoba izinga lokushisa likhuphuka, i-PVC iyathambisa futhi amandla ayo okubamba ingcindezi ehla kakhulu.

Cabanga ngesilinganiso sokucindezela njengamandla aso esimweni esiphelele. Ezingeni lokushisa elithokomele elingu-73°F (23°C), ivalve ye-PVC evamile emhlophe iqinile futhi iqinile. KodwaI-PVC iyi-thermoplastic, okusho ukuthi liya lithamba ngokushisa. Lona umqondo obaluleke kakhulu okufanele uwuqonde: kufanele "wehlise" ingcindezi yamazinga okushisa aphezulu. Isibonelo, ku-100°F (38°C), leyo valvu engu-150 ye-PSI ingase iphephe kuphela kufika ku-110 PSI. Ngesikhathi ufika ku-140°F (60°C), isilinganiso sakhona esiphezulu sehlele cishe ku-30 PSI. Yingakho i-PVC ejwayelekile ingeyemigqa yamanzi abandayo kuphela. Ngezingcindezi eziphakeme noma amazinga okushisa aphakeme kancane, ungabhekaHlela 80 PVC(ngokuvamile okumpunga okumnyama), enezindonga ezijiyile kanye nesilinganiso sokucindezela kokuqala okuphezulu.

I-PVC Pressure Rating vs. Temperature

Uyini umkhawulo wokucindezela wevalvu yebhola?

Uyazi ukuthi ingcindezi emile yesistimu yakho ingaphansi komkhawulo ngokuphephile. Kodwa ukuvaleka kwevalvu kungazelelwe kungadala i-spike yokucindezela edlula kulowo mkhawulo, okubangele ukugqashuka ngokushesha.

Umkhawulo wengcindezi oshiwo owengcindezi emile, engathuki. Lo mkhawulo awubali amandla aguquguqukayo afanaisando samanzi, ukucindezela okungazelelwe okungahle kuphule i-valve elinganiselwe ngezingcindezi eziphakeme kakhulu.

Isando samanzi singumbulali othule wezingxenye zamapayipi. Cabanga ngepayipi elide eligcwele amanzi lihamba ngokushesha. Uma uvala i-valve, wonke lawo manzi anyakazayo kufanele ame ngokushesha. Umfutho udala i-shockwave enkulu ebuyela emuva ngepayipi. Le spike yokucindezela ingaba izikhathi ezi-5 kuye kweziyi-10 ingcindezi yesistimu evamile. Isistimu esebenza ku-60 PSI ingathola i-spike ye-600 PSI okwesikhashana. Ayikho i-valve yebhola ye-PVC evamile engamelana nalokho. Ngihlale ngitshela uBudi ukuthi akhumbuze amakhasimende akhe osonkontileka ngalokhu. Uma i-valve ihluleka, kulula ukusola umkhiqizo. Kodwa ngokuvamile, inkinga iwumklamo wesistimu ongabali isando samanzi. Ukuvimbela okungcono kakhulu ukuvala ama-valve kancane kancane. Ngisho ne-valve yebhola yekota, ukusebenzisa isibambo ngokushelela umzuzwana owodwa noma emibili esikhundleni sokusinqamula kwenza umehluko omkhulu.

Ingakanani ingcindezi i-PVC engamelana nayo?

Ukhethe i-valve efanele, kodwa kuthiwani ngepayipi? Isistimu yakho iqinile kuphela njengesixhumanisi sayo esibuthakathaka, futhi ukwehluleka kwepayipi kubi njengokwehluleka kwevalvu.

Inani lengcindezi ye-PVC elingamelana nayo lincike "kuhlelo" lwayo noma ukushuba kodonga. Ipayipi le-PVC elijwayelekile leSheduli engu-40 linezilinganiso zokucindezela eziphansi kunepayipi eliwugqinsi, eliwuhlelo lwezimboni oluningi lweSheduli engu-80.

Kuyiphutha elivamile ukugxila kuphela esilinganisweni se-valve. Kufanele uhambisane nezingxenye zakho. Ipayipi leSheduli engu-40 yamayintshi angu-2, ipayipi elimhlophe elivamile olibona yonke indawo, ngokuvamile lilinganiselwe cishe ku-140 PSI. Ipayipi leSheduli 80 lama-intshi angu-2, elinezindonga ezijiyile futhi ngokuvamile elimpunga ngokumnyama, likalwe ngaphezu kuka-200 PSI. Awukwazi ukukhulisa umthamo wokucindezela wesistimu yakho ngokusebenzisa i-valve enamandla. Uma ufaka i-valve yeSheduli 80 (elinganiselwe ngo-240 PSI) epayipini le-Sheduli 40 (elilinganiselwe ngo-140 PSI), ukucindezela kokuphepha okuphezulu kohlelo lwakho kusewu-140 PSI kuphela. Ipayipi liba isixhumanisi esibuthakathaka. Kunoma iyiphi isistimu, kufanele ukhombe isilinganiso sokucindezela sayo yonke ingxenye eyodwa—amapayipi, okokufakwayo, namavalvu—futhi uklame isistimu yakho endaweni enesilinganiso esiphansi kakhulu.

Ukuqhathaniswa Kweshejuli Yepayipi (Isibonelo: 2-intshi PVC)

Ingabe ama-valve ebhola e-PVC alungile?

Ubheka i-valve yepulasitiki engasindi futhi ucabanga ukuthi izwakala ishibhile. Ungakwazi yini ukwethemba ngempela le ngxenye engabizi ukuthi ibe ingxenye ethembekile ohlelweni lwakho lwamanzi olubucayi?

Yebo, izinga eliphezuluAma-valve ebhola e-PVCzinhle kakhulu ngokwenhloso yazo. Inani labo alikho emandleni anonya, kodwa ekuvikelekeni okuphelele kokubola, okubenza bathembeke kakhulu kunensimbi ezinhlelweni eziningi.

Umbono "wokushibhile" uvela ekuqhathaniseni i-PVC nensimbi. Kodwa lokhu kugeja iphuzu. Ezinhlelweni eziningi zokufakwa kwamanzi, ikakhulukazi kwezolimo, ezasemanzini, noma izinhlelo zamachibi, ukugqwala kuyimbangela eyinhloko yokwehluleka. Ivalvu yethusi noma yensimbi izogqwala futhi ibambe ngokuhamba kwesikhathi. Ivalvu yekhwalithi ye-PVC, eyenziwe nge-100% ye-virgin resin enezihlalo ezibushelelezi ze-PTFE nama-O-rings angasadingeki, ngeke. Izosebenza kahle iminyaka eminingi endaweni ezocekela phansi insimbi. U-Budi uwina amaklayenti angabazayo ngokulungisa kabusha umbuzo. Umbuzo awukona ukuthi "ingabe ipulasitiki ilungile ngokwanele?" Umbuzo uthi "ingabe insimbi ingasinda emsebenzini?" Ukulawula amanzi abandayo, ikakhulukazi lapho kukhona amakhemikhali noma usawoti, i-valve ye-PVC eyenziwe kahle ayiyona nje into enhle; iwukukhetha okuhlakaniphile, okuthembeke kakhulu, futhi okungabizi kakhulu kwesikhathi eside.

Isiphetho

I-valve yebhola ye-PVC ingakwazi ukuphatha i-150 PSI ekamelweni lokushisa. Inani layo langempela lilele ekumelaneni nokugqwala, kodwa ngaso sonke isikhathi lifaka izinga lokushisa nesando samanzi sohlelo oluphephile, oluhlala isikhathi eside.