Umalunga novavanyo loxinzelelo lwemigca yePVC esanda kufakwa. Uvala ivalve, kodwa ingcinga ekhathazayo ivela: ngaba ivalve ingaphatha uxinzelelo olunamandla, okanye iya kuqhekeka kwaye ikhukulise indawo yomsebenzi?

Hayi, uvavanyo oluqhelekileyo loxinzelelo aluyi konakalisa umgangatho we-valve yebhola ye-PVC. Ezi zivalo zenzelwe ngokukodwa ukubamba uxinzelelo kwibhola evaliweyo. Nangona kunjalo, kuya kufuneka uphephe ukunyuka koxinzelelo ngequbuliso njengehamile yamanzi kwaye ulandele iinkqubo ezichanekileyo.

Le yinkxalabo eqhelekileyo kakhulu, kwaye yinto endihlala ndiyicacisa kumaqabane am, kubandakanya neqela likaBudi eIndonesia. abathengi babo kufuneka ukuzithemba ngokupheleleyo ukuba yethuiivalveuya kwenza phantsi koxinzelelo auvavanyo lwenkqubo. Xa ivalve ibambe ngempumelelo uxinzelelo, ingqina umgangatho wazo zombini ivelufa kunye nofakelo. Uvavanyo olufanelekileyo litywina lokugqibela lokuvunywa komsebenzi owenziwe kakuhle. Ukuqonda indlela yokwenza ngokukhuselekileyo kubalulekile ekuthinteleni iingozi kunye nokuqinisekisa ukuthembeka kwexesha elide kuyo yonke inkqubo yemibhobho yamanzi.

Ngaba unovavanyo loxinzelelo kwivalve yebhola?

Kufuneka uhlukanise icandelo lombhobho ukuze uvavanywe. Ukuvala ivalve yebhola kubonakala kunengqiqo, kodwa unexhala lokuba amandla angabeka esichengeni amatywina okanye ade aqhekeze umzimba wevalvu ngokwawo.

Ewe, unako kwaye kufuneka uvavanyo loxinzelelo kwivalve yebhola evaliweyo. Uyilo lwayo luyenza ilungele ukuba yedwa. Uxinzelelo lunceda ngokwenene ngokutyhala ibhola ngokuqinileyo kwisihlalo esisezantsi, ukuphucula itywina.

Le yenye yeenzuzo eziphambili zeivalve yebholauyilo. Makhe sijonge okwenzekayo ngaphakathi. Xa uvala ivalve kwaye usebenzise uxinzelelo olusuka kwicala elingasentla, loo mandla ityhala yonke ibhola edadayo kwisihlalo esisezantsi sePTFE (Teflon). La mandla acinezela isihlalo, esenza itywina eliqinileyo ngokukodwa. Ivalve ngokoqobo isebenzisa uxinzelelo lovavanyo ukuze izitywine ngokufanelekileyo ngakumbi. Yiyo loo nto ivalve yebhola ingaphezulu kolunye uyilo, njengeiivalve zesango, ngenxa yale njongo. Ivalve yesango inokonakala ukuba ivaliwe kwaye iphantsi koxinzelelo oluphezulu. Uvavanyo oluyimpumelelo, kufuneka ulandele kuphela imithetho emibini elula: Okokuqala, qinisekisa ukuba isibambo siphendulelwa i-90 degrees epheleleyo kwindawo evaliweyo ngokupheleleyo. Ivalve evuleke kancinane iya kuluphumelela uvavanyo. Okwesibini, yazisa uxinzelelo lovavanyo (nokuba lumoya okanye ngamanzi) kwi-system kancinane kwaye ngokuthe ngcembe ukuthintela nakuphi na ukothuka ngequbuliso.

Ngaba unokuvavanya uxinzelelo lombhobho wePVC?

Inkqubo yakho entsha yePVC incamathele ngokupheleleyo kwaye idityanisiwe. Ijongeka igqibelele, kodwa ukuvuza okuncinci, okufihlakeleyo kwindawo enye kunokubangela umonakalo omkhulu kamva. Udinga indlela yokuqinisekisa nge-100%.

Ngokuqinisekileyo. Uvavanyo loxinzelelo lwenkqubo yombhobho wePVC esanda kufakwa linyathelo elingaxoxisiyo nakuwuphi na umtywini oqeqeshiweyo. Olu vavanyo luqinisekisa ukuthembeka kwayo yonke enye i-solvent-welded joint kunye noqhagamshelwano oludityanisiweyo phambi kokuba lugqunywe.

Le yinkqubo ebalulekileyo yokulawula umgangatho. Ukufumana ukuvuza ngaphambi kokuba iindonga zivaliwe okanye imisele iphinde ifakwe umva kulula ukuyilungisa. Ukuyifumana emva koko kuyintlekele. Zimbini iindlela eziphambili zokuvavanyaImibhobho yePVC: i-hydrostatic (amanzi)kunye ne-pneumatic (umoya).

Indlela yoVavanyo	Iingenelo	Iingxaki
Amanzi (Hydrostatic)	Ikhuselekile, njengoko amanzi engacinezeli kwaye agcine amandla amancinci. Ukuvuza kuhlala kulula ukukubona.	Inokuba mdaka. Ifuna umthombo wamanzi kunye nendlela yokukhupha inkqubo emva koko.
Umoya (Umoya)	Umcoci. Ngamanye amaxesha ungafumana ukuvuza okuncinci kakhulu amanzi anokungavezi kwangoko.	Kuyingozi ngakumbi. Umoya ocinezelweyo ugcina amandla amaninzi; ukungaphumeleli kunokugqabhuka.

Kungakhathaliseki ukuba yeyiphi indlela, umgaqo obaluleke kakhulu kukulinda i-samente ye-solvent ukunyanga ngokupheleleyo. Oku kuthatha iiyure ezingama-24, kodwa kufuneka usoloko ujonga imiyalelo yomenzi wesamente. Ukucinezela inkqubo kwangethuba kakhulu kuya kukhupha amalungu. Uxinzelelo lovavanyo kufuneka lube malunga ne-1.5 amaxesha oxinzelelo lwenkqubo yokusebenza, kodwa ungaze udlule umlinganiselo woxinzelelo lwecandelo eliphantsi kakhulu kwinkqubo.

Ngaba ivalve yokujonga iPVC ingahamba kakubi?

Impompo yakho yesump iyabaleka, kodwa inqanaba lamanzi aliwehli. Okanye mhlawumbi ipompo ijikeleza kwaye icima rhoqo. Ukrokrela ingxaki, kwaye ivalve yokukhangela engabonakaliyo inokuba ngunobangela.

Ewe, ivalve yokujonga iPVC inokusilela. Ekubeni sisixhobo esinomatshini esinamalungu ashukumayo, sinokuxinga ngenxa yobutyobo, amatywina aso anokuphela, okanye intwasahlobo yawo inokophuka, nto leyo ekhokelela ekubuyeni ngasemva.

Khangela iivalvungamagorha angavunywanga kwiinkqubo ezininzi zemibhobho yamanzi, kodwa awafi. Umsebenzi wabo kukuvumela ukuhamba kwindlela enye kuphela. Xa bengaphumeleli, phantse kusoloko kukhokelela kwingxaki. Oyena nobangela uqhelekileyo weukusilelabubutyobo. Ilitye elincinci, igqabi, okanye isiqwenga seplastiki sinokungena kwivalve, ukuthintela i-flapper okanye ibhola ukuba ihlale ngokufanelekileyo. Oku kubamba ivalve ngokuyinxenye, ivumela amanzi ukuba abuyele umva. Omnye unobangela kukunxitywa nokukrazuka. Ngaphezulu kwamawaka emijikelo, itywina evala i-flapper okanye ibhola ngokuchasene nayo inokuguga, idale ukuvuza okuncinci, okuzingileyo. Kwi-valve yokukhangela i-spring-assisted check, umthombo wesinyithi unokugqwala ngokuhamba kwexesha, ngokukodwa kumanzi anzima, ekugqibeleni ulahlekelwe uxinzelelo okanye uphule ngokupheleleyo. Yingakho kubalulekile ukufakelakhangela iivalvekwindawo efikelelekayo ukuze ihlolwe kwaye ekugqibeleni itshintshwe. Ziyinto yogcino, hayi isigxina.

Lungakanani uxinzelelo olunokuphathwa ivelufa yebhola yePVC?

Ukhankanya iivalvu zeprojekthi kwaye ubone “150 PSI” ecaleni. Kufuneka wazi ukuba oko kwanele kwisicelo sakho, okanye ukuba ufuna ukhetho olunzima.

Iivalvu zebhola zePVC eziqhelekileyo zilinganiswe kwi-150 ye-PSI yoxinzelelo lwamanzi angenalo ukothuka kwi-73 ° F (23 ° C). Olu phawu loxinzelelo lwehla kakhulu njengoko iqondo lobushushu lolwelo oludlula kwivalvu lukhula.

Ezo nkcukacha zeqondo lobushushu yeyona nto ibaluleke kakhulu ekuqondeni izinga loxinzelelo. Iplastiki yePVC iba thambileyo kwaye ibhetyebhetye ngakumbi njengoko isiba shushu. Njengoko ithambile, amandla ayo okumelana noxinzelelo ayancipha. Lo ngumgaqo osisiseko weenkqubo zemibhobho ye-thermoplastic endihlala ndiyigxininisa kunye noBudi kunye neqela lakhe. Bamele bakhokele abathengi babo ukuba baqwalasele ubushushu bokusebenza kwenkqubo yabo, hayi nje uxinzelelo.

Nasi isikhokelo esibanzi malunga nendlela ubushushu obuchaphazela ngayo umlinganiselo woxinzelelo lwevalve ye-PVC:

Ubushushu be-Fluid	Uqikelelo loxinzelelo lweMax
73°F (23°C)	150 PSI (100%)
100°F (38°C)	110 PSI (~73%)
120°F (49°C)	75 PSI (50%)
140°F (60°C)	50 PSI (~33%)

Igama elithi "ukungothuki" likwabalulekile. Oku kuthetha ukuba ireyithingi isebenza kuxinzelelo oluzinzileyo, olungagungqiyo. Ayina akhawunti ngehamile yamanzi, i-spike yoxinzelelo ngequbuliso ebangelwa yivalve evala ngokukhawuleza. Le spike inokugqithisa ngokulula i-150 PSI kwaye yonakalise inkqubo. Ngalo lonke ixesha sebenzisa iivalvu ngokucothayo ukuthintela oku.

Ukuqukumbela

Uvavanyo loxinzelelo aluyi kuwonakalisa umgangathoIvalve yebhola yePVCukuba yenziwe ngokuchanekileyo. Soloko ucinezela kancinane, hlala ngaphakathi koxinzelelo lwevalvu kunye nemida yobushushu, kwaye uyeke isamente enyibilikayo inyange ngokupheleleyo.