Udinga uku-oda ama-ball valve ephrojekthi, kodwa awuqiniseki ngosayizi oqondile. Uku-oda usayizi ongalungile kusho ukubambezeleka kanye nokubuyiselwa kwemali okubizayo, ikhanda elibuhlungu elingadingi umphathi wokuthenga.

Ubukhulu bama-valve ebhola busekelwe kusayizi wepayipi elijwayelekile abaxhuma kulo. Ngokuvamile basukela kosayizi abancane abayi-1/2 intshi bokusetshenziswa ekhaya kuya kosayizi abakhulu abayi-12 intshi bokusetshenziswa kwezimboni, belandela amazinga omhlaba wonke njenge-NPS ne-DN.

Ukuthola usayizi ofanele kuyisinyathelo esibaluleke kakhulu eku-odeni. Kubonakala kulula, kodwa ngezindinganiso ezahlukene ezisetshenziswa emhlabeni wonke, kungadida. Ngisebenza nabalingani abanjengoBudi e-Indonesia, futhi kufanele sicacise kahle ngosayizi ukuze siqiniseke ukuthi amakhasimende akhe athola lokho akudingayo kumaphrojekthi awo. Ukusebenzisa usayizi ofanele kuqinisekisa ukulingana okufanele, uphawu oluthembekile, kanye nohlelo olusebenza njengoba luklanyelwe. Lokhu akuyona nje ingxenye; kumayelana nempumelelo yokufakwa konke.

Ama-ball valve angena ngobukhulu obungaki?

Ubheka ikhathalogi yabaphakeli futhi uhlu lwamasayizi e-valve lubonakala lungapheli. Uzibuza ukuthi yimaphi amasayizi emisebenzi evamile nokuthi yimaphi awemisebenzi yezimboni ezikhethekile.

Ama-valve ebhola atholakala ngobukhulu obukhulu ukuze afane cishe nayo yonke ipayipi ejwayelekile. Ezinhlelweni eziningi ze-PVC, lokhu kuvame ukuhluka kusuka ku-1/2 intshi (DN15) kuya ku-12 intshi (DN300).

Ububanzi obukhulu bosayizi busho ukuthi kukhonaivalvu yebholacishe kunoma yimuphi umsebenzi, kusukela kokululaimpompi yengadiuxhumano nomthombo omkhulu wamanzi. Isihluthulelo ukuqonda ukuthi yimaphi amasayizi asetshenziselwa izinhlelo zokusebenza. Njengomkhiqizi, sigcina osayizi abavamile ukuze ozakwethu bakwazi ukuthola abakudingayo ngaphandle kwesikhathi eside sokukhokha. Emakethe efana ne-Indonesia, ukuba nesitoreji esilungile sezindlu zokuhlala kanyeubukhulu bokuniselaKusukela ku-1/2″ kuya ku-4″ kubalulekile kuBudi ukuthi akhonze amakhasimende akhe ngempumelelo. Lokhu kuqinisekisa ukuthi umakhi angathola njalo ivalvu ayidingayo emsebenzini wansuku zonke wokufaka amapayipi kanye nowokwakha.

Izigaba Zosayizi kanye Nezicelo

Ububanzi Bosayizi (Amayintshi)	Ububanzi Bosayizi (i-DN)	Amacala Okusetshenziswa Okuvamile	Izicelo Zesibonelo
Indawo yokuhlala encane	1/2″ – 1″	DN15 – DN25	Ukuvalwa kwezinto ngazinye, imigqa yamanzi yasekhaya, ompompi basegadini.
Izentengiselwano Eziphakathi	1-1/4″ – 4″	DN32 – DN100	Ukwakha imigqa emikhulu, izinhlelo zokunisela zezentengiselwano, amachibi okubhukuda.
Izimboni Ezinkulu	6″ nangaphezulu	DN150 nangaphezulu	Izinhlelo zamanzi zikamasipala, imigqa yenqubo yefektri, ezolimo.

Ziyini izilinganiso zamavalvu ezijwayelekile?

Uzwa amagama afana ne-NPS, DN, Imperial, kanye ne-Metric. Lokhu kungenza uku-oda okuvela emazweni ahlukene kube yinto edidayo futhi kudale ingozi yokuthola ingxenye engalingani namapayipi akho.

Osayizi bevalvu abajwayelekile bachazwa uhlelo lwe-NPS (Nominal Pipe Size), olusebenzisa ama-intshi, noma uhlelo lwe-DN (Diameter Nominal), olusebenzisa amamilimitha. Zombili izinhlelo ziqinisekisa ukuhambisana komhlaba wonke phakathi kwamapayipi nezinto zokufaka.

Lezi zindinganiso ziwulimi lwemboni yamapayipi. Zenzelwe ukuthi ivalvu eyenziwe kwelinye izwe ilingane kahle nepayipi elenziwe kwelinye. Inombolo yosayizi “ingu-nominal,” okusho ukuthi igama losayizi, hhayi isilinganiso esiqondile. Ivalvu engamasentimitha amabili ayinawo umgodi ongamasentimitha angu-2,000 ncamashi. Yenzelwe ukulingana nepayipi elingamasentimitha amabili. Ukuqonda kokubiliI-NPSfuthiDNkubalulekile kunoma ubani ohilelekile kwezohwebo lwamazwe ngamazwe, njengami nabalingani bami. Kususa konke ukungabaza futhi kuqinisekisa ukuthi izingxenye zizosebenza ndawonye ngaphandle kokuphazamiseka.

Ukuqonda amazinga e-NPS kanye ne-DN

Nasi ishadi lokuguqulwa elilula losayizi abavamile kakhulu. Ukuba nalokhu kwenza kube lula ukushintsha phakathi kwezinhlelo ezimbili futhi kugwenywe noma yikuphi ukudideka.

I-NPS (Amayintshi)	I-DN (Amamilimitha)
1/2″	I-DN15
3/4″	I-DN20
1″	I-DN25
1-1/2″	I-DN40
2″	I-DN50
3″	I-DN80
4″	I-DN100

Ungayibona kanjani isayizi yevalvu?

Usemsebenzini futhi udinga ukushintsha ivalvu endala. Ivalvu ingcolile, futhi akukho ukupakishwa noma amaphepha, ngakho-ke awuqiniseki ukuthi uzoyi-oda ngosayizi ongakanani.

Ukuze uthole usayizi wevalvu, hlola umzimba wevalvu ukuze uthole izimpawu ezifakwe uphawu noma eziphrintiwe. Uzobona isilinganiso se-intshi (isb., “2″) noma inani le-DN (isb., “DN50″).

Abakhiqizi cishe njalo babeka uphawu losayizi ngqo kumkhiqizo. Lena yindlela esheshayo nethembekile yokuwubona. Bheka ngokucophelela emzimbeni oyinhloko wevalvu. Ngezinye izikhathi ilogo yomkhiqizo noma isilinganiso sokucindezela sibonakala kakhulu, kodwa ukubizwa kosayizi kuzoba lapho.ama-valve ebhola le-union yangempela, ungase uthole nosayizi ophawulwe kuma-union nuts. Uma usuyitholile le nombolo, ungaqiniseka ngokuphelele ngoku-oda indawo efanele. Lokhu kuhlola okulula konga isikhathi esiningi futhi kuvimbela ukukhungatheka kokuthola ingxenye engafanele.

Okufanele Ukwenze Uma Kungekho Amamaki

Uma ivalvu indala kakhulu noma igugile futhi ungakwazi ukuthola noma yiziphi izimpawu, unezinketho ezimbalwa. Ungalingi nje ingaphandle levalvu, ngoba lokhu kungadukisa.

1. Hlola ipayipi:Lena indlela engcono kakhulu. Ipayipi ivalvu exhunywe kuyo izonyatheliswa ngosayizi wayo ngobude bayo. Bheka izimpawu ezifana nokuthi “PVC Schedule 40 2 INCH” noma “UPVC PN10 DN50″. Usayizi wevalvu uzohambisana nosayizi wepayipi.
2. Kala i-Inside Port:Kala ngokucophelela ububanzi bangaphakathi bomgodi lapho amanzi egeleza khona. Lokhu kulinganisa kuzoba seduze kakhulu nobukhulu obujwayelekile. Isibonelo, ivalvu engamasentimitha amabili izoba nobubanzi bangaphakathi obungaba amasentimitha amabili.
3. Qhathanisa neValve Eyaziwayo:Uma unezinye izivalo zobukhulu obaziwayo, ungenza ukuqhathanisa okuqondile ngokomzimba.

Kusho ukuthini i-DN50 ku-valve?

Ubuyekeza ishidi lemininingwane yobuchwepheshe elivela kumhlinzeki waseYurophu. Ubona i-“DN50″ futhi udinga ukwazi ukuthi usayizi ongakanani lowo ngokwemigomo ezoqondwa yithimba lakho lendawo.

I-DN50 imele “Ububanzi obuyi-Diameter Nominal 50 millimeters”. Usayizi ojwayelekile wamazwe ngamazwe olingana nosayizi wama-intshi amabili (NPS) osetshenziswa e-United States nakwezinye izifunda.

Uhlelo lwe-DN ludala indinganiso yomhlaba wonke kuwo wonke umuntu.Ububanzi obujwayelekile"Kusho nje ukuthi yigama lobukhulu, hhayi isilinganiso esiqinile. Ngokusebenzisa i-DN, umphathi wephrojekthi e-Indonesia njengoBudi anga-oda kumkhiqizi onjengami eShayina, futhi sobabili siyazi kahle ukuthi sikhuluma ngani. Kuqeda ukudideka phakathi kwezinhlelo ze-metric kanye neze-empire futhi kuyisisekelo sokuhambisana komhlaba wonke embonini yethu. Uma ubona i-DN, uyazi ukuthi usebenzisa i-Izinga le-ISOLokhu kuqinisekisa ukuthi ivalvu ye-DN50 izolingana nanoma yiliphi ipayipi noma ukufakwa kwe-DN50, kungakhathaliseki ukuthi yenziwe kuphi emhlabeni.

Usayizi Ojwayelekile We-DN kanye Nokulingana Kwawo Kwamasentimitha

Ukuqonda lobu budlelwano kubalulekile ekusebenzeni nemikhiqizo yamazwe ngamazwe.

Usayizi we-DN	Incazelo Eqondile	I-Common Inch Equivalent (NPS)
I-DN15	Ububanzi obujwayelekile 15 mm	1/2″
I-DN25	Ububanzi obujwayelekile 25 mm	1″
I-DN50	Ububanzi obujwayelekile 50 mm	2″
I-DN100	Ububanzi obujwayelekile 100 mm	4″

Lokhu kulungiswa kwezindinganiso yikho okusivumela ukuthi sakhe izinhlelo zamanzi ezinokwethenjelwa emhlabeni wonke.

Isiphetho

Ukuqondaosayizi bevalvu yebholakubalulekile eku-odeni izingxenye ezifanele. Ngokwazi izinhlelo ezijwayelekile ezifanaI-NPS kanye ne-DNnokuthi ungayithola kanjani usayizi ku-valve, ugwema amaphutha abizayo.