Ukhetha ivalvu yesistimu entsha. Ukukhetha leyo engakwazi ukumelana nokucindezela kolayini kungaholela ekuqhumeni okungazelelwe, okuyinhlekelele, kubangele isikhukhula, ukulinyazwa kwempahla, kanye nesikhathi esibizayo sokuphumula.

Ivalvu yebhola ye-PVC ejwayelekile ivamise ukukalwa ngo-150 PSI (Amaphawundi nge-Inch yesikwele) ku-73°F (23°C). Lesi silinganiso sokucindezela sehla kakhulu njengoba izinga lokushisa loketshezi likhuphuka, ngakho kufanele uhlole idatha yomkhiqizi njalo.

Lona omunye wemininingwane yezobuchwepheshe ebaluleke kakhulu engixoxa ngayo nozakwethu abafana no-Budi. Ukuqondaisilinganiso sokucindezelaakukhona nje ukufunda inombolo; imayelana nokuqinisekisa ukuphepha nokwethembeka kumakhasimende akhe. Lapho ithimba likaBudi lingachaza ngokuzethemba ukuthi kungani a150 PSI valveilungele uhlelo lokunisela kodwa hhayi ulayini wamanzi ashisayo, bayasuka ekubeni abathengisi baye ekubeni abeluleki abathembekile. Lolu lwazi luvimbela ukwehluleka futhi lwakha ubudlelwano besikhathi eside, obuyisisekelo sebhizinisi lethu e-Pntek.

Ingakanani ingcindezi i-PVC ilinganiselwe?

Iklayenti lakho licabanga ukuthi zonke izingxenye ze-PVC ziyefana. Leli phutha eliyingozi lingabaholela ekusebenziseni ipayipi enezinga eliphansi eline-valve enezinga eliphezulu, okwenza ibhomu lesikhathi sokumaka ohlelweni lwabo.

Isilinganiso sokucindezela se-PVC sincike ekugqinsileni kodonga lwayo (Ishejuli) nobubanzi. Ipayipi le-Schedule 40 elijwayelekile lingasukela kwangaphezulu kuka-400 PSI kosayizi abancane kuya ngaphansi kuka-200 PSI kokukhudlwana.

Kuyiphutha elivamile ukucabanga ukuthi isistimu ilinganiselwe ku-150 PSI ngenxa nje yokuthi i-valve yebhola. Ngihlale ngigcizelela kuBudi ukuthi lonke uhlelo luqinile njengengxenye yalo ebuthaka kakhulu. Isilinganiso sokucindezela se-PVCipayipiihlukile kuvalvu. Ichazwa “Ngeshejuli” yayo, esho ukushuba kodonga.

• Isheduli 40:Lona ukuqina kodonga olujwayelekile lwamapayipi amaningi amanzi nokunisela.
• Isheduli 80:Leli payipi linodonga olukhulu kakhulu futhi, ngakho-ke, isilinganiso sokucindezela esiphezulu kakhulu. Ivame ukusetshenziswa ezimbonini zokusebenza.

Ukhiye othathwayo ukuthi ukulinganisa kwengcindezi kuyashintsha ngosayizi wepayipi. Nasi isiqhathaniso esilula sepayipi leSheduli 40 ku-73°F (23°C):

Isistimu enamapayipi angu-4″ Sch 40 kanye namavalvu ethu ebhola angu-150 PSI inengcindezi yokusebenza ephezulu engu-150 PSI. Kufanele uhlale udizayina ingxenye enesilinganiso esiphansi kakhulu.

Siyini isilinganiso sokucindezela se-valve yebhola?

Ubona ivalvu yethusi elinganiselwe ku-600 PSI kanye nevalvu ye-PVC engu-150 PSI. Ukungaqondi ukuthi kungani behlukile kungenza kube nzima ukuthethelela ukukhetha ofanele umsebenzi.

Isilinganiso sokucindezela kwe-valve yebhola sinqunywa impahla nokwakhiwa kwayo. Amavalvu e-PVC ngokuvamile angu-150 PSI, kuyilapho amavalvu ensimbi enziwe ngethusi noma ngensimbi angalinganiselwa ku-600 PSI kuya ku-3000 PSI.

Igama"i-valve yebhola"ichaza umsebenzi, kodwa amandla okucindezela avela ezintweni. Kuyindaba yakudala yokusebenzisa ithuluzi elifanele lomsebenzi. Kumakhasimende akhe, ithimba likaBudi lidinga ukuwaqondisa ngokusekelwe kuhlelo lokusebenza.

Izinto Ezibalulekile Ezinquma Isilinganiso Sokucindezela:

1. Impahla Yomzimba:Lesi isici esikhulu kunazo zonke. I-PVC inamandla, kodwa insimbi inamandla. I-Brass iyisinqumo esivamile samanzi ashisayo okuhlala kanye nezicelo ezijwayelekile ezifika ku-600 PSI. Insimbi ye-Carbon nensimbi engagqwali isetshenziselwa izinqubo zezimboni ezinomfutho ophezulu lapho izingcindezi zingaba ezinkulungwaneni ze-PSI.
2. Isihlalo & Seal Material:Izingxenye “ezithambile” ngaphakathi kwevalvu, njengezihlalo ze-PTFE ezisetshenziswa amavalvu ethu e-Pntek, nazo zinemikhawulo yokucindezela kanye nezinga lokushisa. Kumele bakwazi ukwenza uphawu ngaphandle kokukhubazeka noma ukucekelwa phansi kwengcindezi yesistimu.
3. Ukwakha:Indlela umzimba we-valve ohlanganiswe ngayo nawo udlala indima emandleni awo.

A I-valve ye-PVCIzilinganiso ze-PSI ezingu-150 zingaphezu kokwanele izinhlelo eziningi zamanzi ezakhelwe zona, njengokunisela, amachibi, namapayipi okuhlala.

Siyini isilinganiso somfutho we-valve?

Ubona okuthi “150 PSI @ 73°F” emzimbeni wevalvu. Uma ugxila kuphela ku-150 PSI futhi ungayinaki izinga lokushisa, ungafaka i-valve emugqeni lapho kuqinisekisiwe ukuthi izohluleka.

Isilinganiso sokucindezela kwe-valve ingcindezi ephezulu yokusebenza ephephile i-valve engakwazi ukuyiphatha ezingeni lokushisa elithile. Ngamavalvu amanzi, lokhu kuvame ukubizwa nge-Cold Working Pressure (CWP) isilinganiso.

Le ncazelo enezingxenye ezimbili—ingcindeziatizinga lokushisa—kuwumqondo obaluleke kakhulu okufanele ufundiswe. Ubuhlobo bulula: njengoba izinga lokushisa liyenyuka, amandla ezinto ze-PVC ayehla, kanjalo nesilinganiso sawo sokucindezela. Lokhu kubizwa ngokuthi "de-rating." Amavalvu ethu e-Pntek alinganiselwe ku-150 PSI endaweni evamile yokushisa kwegumbi. Uma ikhasimende lakho lizama ukusebenzisa yona leyo valve emugqeni onamanzi angu-120°F (49°C), ukucindezela okuphephile elingakwazi ukukubamba kungase kwehle ngo-50% noma ngaphezulu. Wonke umkhiqizi ohloniphekile uhlinzeka ngeshadi lokuyeka isilinganiso elibonisa ingcindezi enkulu evunyelwe emazingeni okushisa aphezulu. Ngenze isiqiniseko sokuthi iBudi inalawa mashadi ayo yonke imikhiqizo yethu. Ukuziba lobu budlelwano kuyimbangela yokuqala yokwehluleka kwempahla kumasistimu amapayipi e-thermoplastic.

Siyini isilinganiso sokucindezela sevalvu yebhola ye-Class 3000?

Ikhasimende lezimboni licela ivalvu ethi “Class 3000″. Uma ungazi ukuthi lokhu kusho ukuthini, ungase uzame ukuthola okulingana ne-PVC, okungekho, futhi okubonisa ukuntula uchwepheshe.

I-valve yebhola ye-Class 3000 iyivalvu yezimboni enengcindezi ephezulu eyenziwe ngensimbi engumgunyathi, elinganiselwe ukusingatha u-3000 PSI. Lesi isigaba esihluke ngokuphelele kumavalvu e-PVC futhi sisetshenziselwa uwoyela negesi.

Lo mbuzo usiza ukudweba umugqa ocacile esihlabathini sokusetshenziswa komkhiqizo. Izilinganiso “zekilasi” (isb, Ikilasi 150, 300, 600, 3000) ziyingxenye yezinga elithile le-ANSI/ASME elisetshenziselwa ama-flange wezimboni namavalvu, cishe ahlala enziwe ngensimbi. Lolu hlelo lokulinganisa luyinkimbinkimbi kakhulu kunesilinganiso esilula se-CWP kuvalvu ye-PVC. AI-valve ye-Class 3000akukhona nje okokucindezela okuphezulu; yakhelwe amazinga okushisa adlulele kanye nezimo ezinzima ezifana nalezo ezitholakala embonini kawoyela negesi. Kungumkhiqizo okhethekile obiza amakhulu noma izinkulungwane zamadola. Uma ikhasimende licela lokhu, lisebenza embonini ethile engafanele i-PVC. Ukwazi lokhu kuvumela ithimba likaBudi ukuthi libone ngokushesha isicelo futhi ligweme ukucaphuna emsebenzini lapho imikhiqizo yethu izosetshenziswa kabi ngokuyingozi. Iqinisa ubuchwepheshe ngokwazi lokho wenaungenzithengisa, njengoba nje wenza.

Isiphetho

Isilinganiso sokucindezela kwevalvu yebhola ye-PVC ngokuvamile singu-150 PSI ekamelweni lokushisa, kodwa lokhu kuyehla njengoba ukushisa kukhula. Hlala uqondanisa i-valve nengcindezi yesistimu kanye nezimfuno zezinga lokushisa.