Uza kuvavanya uxinzelelo lwakho lwe-PVC olusandula ukufakwa. Uyayivala ivalvu, kodwa kuvela ingcinga ekhathazayo: ingaba ivalvu ingamelana noxinzelelo oluqatha, okanye iza kuqhekeka ize izalise indawo yokusebenza?

Hayi, uvavanyo oluqhelekileyo loxinzelelo aluyi konakalisa ivalvu yebhola yePVC esemgangathweni. Ezi valve zenzelwe ngokukodwa ukubamba uxinzelelo kwibhola evaliweyo. Nangona kunjalo, kufuneka uphephe ukunyuka koxinzelelo ngequbuliso njengehamile yamanzi kwaye ulandele iinkqubo ezichanekileyo.

Le yingxaki eqhelekileyo, kwaye yinto endihlala ndiyicacisa kumaqabane am, kuquka neqela likaBudi eIndonesia. Abathengi babo badinga ukuzithemba ngokupheleleyo ukubaiivalvuuya kusebenza phantsi koxinzelelo lweuvavanyo lwenkquboXa ivalvu ibambe uxinzelelo ngempumelelo, ingqina umgangatho wevalvu kunye nofakelo. Uvavanyo olufanelekileyo luphawu lokugqibela lokuvunywa komsebenzi owenziwe kakuhle. Ukuqonda indlela yokuwenza ngokukhuselekileyo kubalulekile ekuthinteleni iingozi nokuqinisekisa ukuthembeka kwexesha elide kwenkqubo yonke yemibhobho.

Ngaba ungaluvavanya uxinzelelo ngevalvu yebhola?

Kuya kufuneka wahlukanise icandelo lombhobho ukuze uvavanye. Ukuvala ivalvu yebhola kubonakala kunengqondo, kodwa ukhathazekile ukuba amandla anokuphazamisana nezitywino okanye aqhekeze umzimba wevalvu ngokwawo.

Ewe, ungaluvavanya uxinzelelo ngevalvu yebhola evaliweyo kwaye ufanele uyivavanye. Uyilo lwayo lwenza ukuba ilungele ukuhlukaniswa. Uxinzelelo lunceda ngokutyhala ibhola ngokuqinileyo kwisihlalo esisezantsi, nto leyo ephucula isitywino.

Le yenye yezona nzuzo ziphambili zeiivalvu zebholauyilo. Makhe sijonge okwenzekayo ngaphakathi. Xa uvala ivalvu uze ufake uxinzelelo oluvela kwicala elingasentla, loo mandla atyhala yonke ibhola edadayo kwisihlalo sePTFE (Teflon) esisezantsi. La mandla acinezela isihlalo, okwenza isitywino esiqinileyo kakhulu. Ivalvu isebenzisa uxinzelelo lovavanyo ukuzitywina ngempumelelo. Yingakho ivalvu yebhola ingcono kunezinye iindlela, ezifanaiivalvu zesango, ngenxa yesi sizathu. Ivalvu yesango ingonakala ukuba ivaliwe kwaye iphantsi koxinzelelo oluphezulu. Ukuze uvavanyo luphumelele, kufuneka ulandele imithetho emibini elula kuphela: Okokuqala, qinisekisa ukuba isiphatho sijikwe ngama-90 degrees apheleleyo kwindawo evaliweyo ngokupheleleyo. Ivalvu evulekileyo kancinci iya kungaphumeleli kuvavanyo. Okwesibini, faka uxinzelelo lovavanyo (nokuba ngumoya okanye ngamanzi) kwinkqubo kancinci kancinci ukuthintela naluphi na uloyiko olukhawulezileyo.

Ngaba ungawuvavanya umbhobho wePVC oxinzelelweyo?

Inkqubo yakho entsha ye-PVC incamathiselwe ngokupheleleyo kwaye idityanisiwe. Ijongeka igqibelele, kodwa ukuvuza okuncinci, okufihlakeleyo kwilungu elinye kunokubangela umonakalo omkhulu kamva. Udinga indlela yokuqiniseka nge-100%.

Ngokuqinisekileyo. Uvavanyo loxinzelelo kwinkqubo yombhobho wePVC esandula ukufakwa linyathelo elingenakuphikiswana ngalo naliphi na ingcali yeplamba. Olu vavanyo luqinisekisa ukuthembeka kwayo yonke ijoyinti edityaniswe nge-solvent kunye noqhagamshelo olunemisonto ngaphambi kokuba zigqunywe.

Le yinkqubo ebalulekileyo yokulawula umgangatho. Ukufumana indawo evuzayo ngaphambi kokuba iindonga zivaliwe okanye imisele izaliswe kwakhona kulula ukuyilungisa. Ukuyifumana emva koko yintlekele. Kukho iindlela ezimbini eziphambili zokuvavanyaImibhobho yePVC: i-hydrostatic (amanzi)kunye nomoya (umoya).

Indlela yoVavanyo	Iingenelo	Iingxaki
Amanzi (Amanzi angenawo umbane)	Kukhuselekile, kuba amanzi akaxinani kwaye agcina amandla amancinci. Ukuvuza kudla ngokubonakala lula.	Ingangcolisa. Ifuna umthombo wamanzi kunye nendlela yokukhupha amanzi kwinkqubo emva koko.
Umoya (i-Pneumatic)	Isicoci. Ngamanye amaxesha ndinokufumana ukuvuza okuncinci kakhulu okusenokungabonakali ngamanzi ngoko nangoko.	Ingozi ngakumbi. Umoya ocinezelweyo ugcina amandla amaninzi; ukungaphumeleli kwawo kunokuba yinto eyingozi kakhulu.

Nokuba yeyiphi na indlela, owona mgaqo ubalulekileyo kukulinda i-solvent cement iphole ngokupheleleyo. Oku kuthatha iiyure ezingama-24, kodwa kufuneka uhlale ujonga imiyalelo yomenzi wesamente. Ukucinezela inkqubo kwangethuba kakhulu kuya kutshabalalisa amalungu. Uxinzelelo lovavanyo kufuneka lube malunga ne-1.5 uxinzelelo olusebenzayo lwenkqubo, kodwa ungaze udlule umlinganiselo woxinzelelo lwecandelo eliphantsi kakhulu kwinkqubo.

Ngaba ivalvu yokujonga iPVC ingahamba kakubi?

Ipompo yakho yesump iyasebenza, kodwa inqanaba lamanzi alinciphi. Okanye mhlawumbi ipompo ijikeleza iphinda ivale rhoqo. Ucinga ukuba kukho ingxaki, kwaye ivalvu yokujonga engabonakaliyo inokuba ngunobangela.

Ewe, ivalvu yokujonga iPVC inokungasebenzi. Ekubeni sisixhobo soomatshini esinezinto ezihambayo, sinokubambeka ngenxa yenkunkuma, izitywino zayo zinokuguga, okanye ispring yayo inokuqhekeka, nto leyo ekhokelela ekubuyeleni kwamanzi.

Jonga iivalvuzingamaqhawe angadunyiswanga kwiinkqubo ezininzi zombhobho, kodwa azinakufa. Umsebenzi wazo kukuvumela ukuhamba kwendlela ukuya kwicala elinye kuphela. Xa zingaphumeleli, phantse rhoqo kukhokelela kwingxaki. Eyona nto ixhaphakileyoukusilelayimfumba. Ilitye elincinci, igqabi, okanye iqhekeza leplastiki linokufumaneka kwivalvu, nto leyo ethintela iflapper okanye ibhola ukuba ingahlali kakuhle. Oku kugcina ivalvu ivuleke kancinci, nto leyo evumela amanzi ukuba abuyele umva. Esinye isizathu kukuguguleka nje. Kwimijikelo emininzi, isitywino esivalwa yiflapper okanye ibhola sinokuguguleka, nto leyo edala ukuvuza okuncinci, okuqhubekayo. Kwivalvu yokuhlola encediswa yintwasahlobo, intwasahlobo yesinyithi inokuguguleka ngokuhamba kwexesha, ingakumbi emanzini aqatha, ekugqibeleni ilahlekelwe kukuxinana okanye ukwaphuka ngokupheleleyo. Yingakho kubalulekile ukufakaiivalvu zokujongakwindawo efikelelekayo yokuhlolwa nokutshintshwa ekugqibeleni. Zizinto zokulungisa, aziyonto esisigxina.

Ingakanani uxinzelelo olunokuphathwa yivalvu yebhola yePVC?

Uchaza iivalvu zeprojekthi kwaye ubone "150 PSI" ecaleni. Kufuneka wazi ukuba oko kwanele na kwisicelo sakho, okanye ukuba ufuna ukhetho olunzima.

Iivalvu zebhola zePVC eziqhelekileyo zihlala zilinganiswa nge-150 PSI yoxinzelelo lwamanzi olungashukumiyo kwi-73°F (23°C). Olu xinzelelo luyancipha kakhulu njengoko ubushushu bolwelo oludlula kwivalvu busanda.

Loo nkcukacha yobushushu yeyona nto ibalulekileyo ekuqondeni umlinganiselo woxinzelelo. Iplastiki yePVC iba thambile kwaye iguquguquke ngakumbi njengoko ishushu ngakumbi. Njengoko ithambile, amandla ayo okumelana noxinzelelo ayancitshiswa. Lo ngumgaqo osisiseko weenkqubo zemibhobho ye-thermoplastic endihlala ndiwugxininisa kuBudi neqela lakhe. Kufuneka bakhokele abathengi babo ukuba baqwalasele ubushushu bokusebenza kwenkqubo yabo, kungekuphela nje koxinzelelo.

Nantsi isikhokelo esiqhelekileyo sendlela ubushushu obuchaphazela ngayo umlinganiselo woxinzelelo lwevalvu yePVC:

Ubushushu bolwelo	Uvavanyo loxinzelelo oluphezulu oluqikelelweyo
73°F (23°C)	I-150 PSI (100%)
100°F (38°C)	I-110 PSI (~73%)
120°F (49°C)	I-75 PSI (50%)
140°F (60°C)	I-50 PSI (~33%)

Igama elithi “non-shock” nalo libalulekile. Oku kuthetha ukuba olu vavanyo lusebenza kuxinzelelo oluzinzileyo nolungaguqukiyo. Ayibalulekanga ihamile yamanzi, ebangela ukunyuka koxinzelelo ngequbuliso okubangelwa kukuvalwa kwevalvu ngokukhawuleza. Olu kunyuka kunokudlula i-150 PSI ngokulula kwaye lonakalise inkqubo. Soloko usebenzisa iivalvu kancinci ukuthintela oku.

Isiphelo

Uvavanyo loxinzelelo aluyi konakalisa umgangathoIvalvu yebhola yePVCUkuba yenziwe ngokuchanekileyo. Soloko ucinezela kancinci, hlala ngaphakathi kwemida yoxinzelelo kunye nobushushu bevalvu, kwaye uvumele isamente yesolvent iphole ngokupheleleyo.