U-odole ilori egcwele iivalvu zeprojekthi enkulu. Kodwa xa zifika, imisonto ayihambelani nemibhobho yakho, nto leyo ebangela ukulibaziseka okukhulu kunye nokubuyiselwa kwemali eninzi.

Iintlobo ezimbini eziphambili zemisonto yevalvu yebhola yiNPT (National Pipe Taper) esetyenziswa eMntla Melika, kunye neBSP (British Standard Pipe), exhaphakileyo naphi na. Ukwazi ukuba yeyiphi esetyenziswa ngummandla wakho linyathelo lokuqala lokunxibelelana okungenako ukuvuza.

Ukufumana uhlobo lwemisonto ngendlela eyiyo yenye yezona zinto zilula, kodwa zibalulekileyo, ekufumaneni ulwazi. Ndakha ndasebenza noBudi, umphathi wokuthenga eIndonesia, owathi ngempazamo wayalela ikhonteyina yeevalvu ezinemisonto ye-NPT endaweni yekhonteyina.Umgangatho we-BSPisetyenziswa kwilizwe lakhe. Yayiyimpazamo nje ebangele intloko ebuhlungu kakhulu. Imisonto ifana, kodwa ayihambelani kwaye iya kuvuza. Ngaphaya kwemisonto, kukho ezinye iintlobo zoqhagamshelo ezifana nesokhethi kunye neflange ezisombulula iingxaki ezahlukeneyo. Masiqinisekise ukuba ungazahlula zonke.

Ithetha ukuthini i-NPT kwivalvu yebhola?

Ubona "i-NPT" kwiphepha leenkcukacha uze ucinge ukuba ngumsonto nje oqhelekileyo. Ukungayinaki le nkcukacha kunokukhokelela kwiinxibelelwano ezibonakala ziqinile kodwa zivuza phantsi koxinzelelo.

Izitendi ze-NPTkwiNational Pipe Taper. Igama eliphambili lithi “taper.” Imisonto igobile kancinci, ngoko ke iyadibana xa uyiqinisa ukuze wenze isitywino esomeleleyo somatshini.

Uyilo oluthambileyo luyimfihlo yamandla okuvala e-NPT. Njengoko umbhobho we-NPT oyindoda ukrufula kwi-fitting ye-NPT yabasetyhini, ububanzi bamacandelo omabini buyatshintsha. Olu lungelelwaniso lokuphazamiseka lutyumza imisonto kunye, lwenze isitywina sokuqala. Nangona kunjalo, olu tshintsho lwesinyithi kwisinyithi okanye kwiplastiki kwiplastiki alugqibelelanga. Kusoloko kukho izithuba ezincinci ezijikelezayo ezishiyekileyo. Yiyo loo nto kufuneka uhlale usebenzisa isitywina sentambo, njengeteyipu ye-PTFE okanye ipayipi, enonxibelelwano lwe-NPT. Isitywina sizalisa ezi zithuba ezincinci ukuze unxibelelwano lungabi namanzi ngokwenene. Lo mgangatho uxhaphakile eMelika naseKhanada. Kubathengi bamazwe ngamazwe abanjengoBudi, kubalulekile ukucacisa "i-NPT" kuphela xa beqinisekile ukuba iprojekthi yabo iyayifuna; kungenjalo, bafuna umgangatho we-BSP oqhelekileyo e-Asia naseYurophu.

Ziziphi iintlobo ezahlukeneyo zoqhagamshelo lweevalvu?

Udinga ukuqhagamshela ivalvu kumbhobho. Kodwa ubona ezinye iindlela "ezinemisonto," "isokhethi," kunye "neflanged," kwaye awuqinisekanga ukuba yeyiphi efanelekileyo kumsebenzi wakho.

Iintlobo ezintathu eziphambili zoqhagamshelo lweevalvu zifakelwe imisonto kwiipayipi ezikrufulwe, isokhethi yeepayipi zePVC ezincamathelisiweyo, kwaye zifakelwe kwiinkqubo zeepayipi ezinkulu, ezinamabholiti. Nganye yenzelwe izinto ezahlukeneyo zepayipi, ubungakanani, kunye nesidingo sokulungiswa.

Ukukhetha uhlobo olufanelekileyo loqhagamshelo kubaluleke kakhulu njengokukhetha ivalvu efanelekileyo. Azitshintshi. Ngayinye isebenza injongo eyahlukileyo kwaye ifanelekile kwiindlela ezahlukeneyo. Zicinge njengeendlela ezahlukeneyo zokudibanisa indlela.Uqhagamshelo olunemisontozifana nendawo eqhelekileyo yokuhlangana,uqhagamshelo lwesokhethizifana nokudibana okusisigxina apho iindlela ezimbini ziba nye, kwaye uqhagamshelo olune-flange lufana necandelo lebhulorho elinokutshintshwa ngokulula. Ndisoloko ndicebisa iqela likaBudi ukuba likhokele abathengi balo ngokusekelwe kwikamva lenkqubo yabo. Ngaba ngumgca wokunkcenkceshela osisigxina ongasoze utshintshwe? Sebenzisa i-socket weld. Ngaba luqhagamshelo kwipompo enokufuna ukutshintshwa? Sebenzisa ivalvu enemisonto okanye e-flange ukuze kube lula ukuyisusa.

Iintlobo zoQhagamshelo lweeValve eziphambili

Ziziphi iintlobo ezine zeevalvu zebhola?

Uva abantu bethetha ngeevalvu “zesiqwenga esinye,” “zesiqwenga ezibini,” okanye “zesiqwenga esithathu”. Oku kuvakala kudida kwaye ukhathazekile ukuba uthenga esingafanelekanga kwibhajethi yakho kunye neemfuno zakho zokulungisa.

Iivalvu zebhola zihlala zahlulwe ngokwendlela ezakhiwe ngayo umzimba wazo: Iqhekeza elinye (okanye elincinci), iqhekeza ezimbini, kunye neqhekeza ezintathu. Olu yilo lugqiba ixabiso levalvu kunye nokuba ingalungiswa na.

Nangona abantu ngamanye amaxesha bekhankanya iintlobo ezine, iindlela ezintathu eziphambili zokwakha zigubungela phantse zonke iindlela zokusebenza.Ivalvu "yeSiqwenga esinye", edla ngokubizwa ngokuba yi-Compact valve, inomzimba owenziwe ngeplastiki enye ebunjiweyo. Ibhola ivalwe ngaphakathi, ngoko ke ayinakuhlulwahlulwa ukuze ilungiswe. Oku kwenza ukuba ibe lolona khetho lungabizi kakhulu, kodwa ngokuyintloko ilahlwa. Ivalvu "yeZiqwenga ezibini" inomzimba owenziwe ngamacandelo amabini adibanisa ibhola. Olu lolona hlobo luqhelekileyo. Ingasuswa kumbhobho kwaye ihlulwe ukuze kutshintshwe izitywino zangaphakathi, inika ibhalansi elungileyo yeendleko kunye nokusebenza kakuhle. Ivalvu "yeZiqwenga ezintathu" yeyona iphambili. Inomzimba ophakathi oqulathe ibhola, kunye nezihlanganisi ezimbini ezahlukeneyo. Olu yilo lukuvumela ukuba ususe umzimba oyintloko ukuze ulungiswe okanye utshintshwe ngaphandle kokusika umbhobho. Yeyona ibiza kakhulu kodwa ifanelekile kwimigca yefektri apho ungenakuhlawula ukuvalwa okude kokugcinwa.

Yintoni umahluko phakathi kwe-NPT kunye noqhagamshelo lwe-flange?

Uyila inkqubo kwaye kufuneka ukhethe phakathi kweevalvu ezinemisonto okanye ezijijekileyo. Ukwenza umnxeba ongalunganga kunokwenza ukufakelwa kube yingxaki enkulu kwaye ukulungiswa kubize kakhulu ekuhambeni kwexesha.

Uqhagamshelo lwe-NPT lunemisonto kwaye lulungele iipayipi ezincinci, nto leyo eyenza uqhagamshelo oluhlala luhleli olunzima ukululungisa. Uqhagamshelo lweFlange lusebenzisa iibholithi kwaye lulungele iipayipi ezinkulu, nto leyo evumela ukuba kususwe iivalvu lula ukuze kugcinwe kakuhle.

Ukukhetha phakathi kwe-NPT kunye neflange kuxhomekeke kwizinto ezintathu: ubungakanani bombhobho, uxinzelelo, kunye neemfuno zokugcinwa. Imisonto ye-NPT intle kakhulu kwimibhobho emincinci enobubanzi, edla ngokuba yi-intshi ezi-4 nangaphantsi. Ixabiso layo liphantsi kwaye yenza isitywina esinamandla kakhulu, esinoxinzelelo oluphezulu xa ifakelwe ngokuchanekileyo nge-sealant. Ingxaki yayo enkulu kukugcinwa. Ukutshintsha ivalvu enemisonto, kufuneka unqumle umbhobho. Iiflanges sisisombululo semibhobho emikhulu nakweyiphi na inkqubo apho ukugcinwa kuyinto ephambili. Ukubopha ivalvu phakathi kweeflanges ezimbini kuvumela ukuba isuswe kwaye itshintshwe ngokukhawuleza ngaphandle kokuphazamisa umbhobho. Yingakho abathengi bekontrakthi kaBudi abakha izityalo ezinkulu zonyango lwamanzi phantse baodola iivalvu ezineflanges kuphela. Zibiza kakhulu kwangaphambili, kodwa zonga ixesha elininzi kunye nomsebenzi ngexesha lokulungiswa kwexesha elizayo.

Uthelekiso lwe-NPT vs. Flange

Isiphelo

Ukukhetha umsonto okanye uqhagamshelo oluchanekileyo—i-NPT, i-BSP, isokhethi, okanye i-flange—lelona nyathelo libalulekileyo ekwakheni inkqubo ekhuselekileyo, engavuziyo kwaye iqinisekise ukugcinwa okulula kwixesha elizayo.