U-odole ilori yeevalvu zeprojekthi enkulu. Kodwa xa zifika, imisonto ayihambelani nemibhobho yakho, ibangela ukulibaziseka okukhulu kunye nembuyekezo ebiza kakhulu.

Iindidi ezimbini eziphambili zemisonto yevalve yebhola yi-NPT (i-National Pipe Taper) esetyenziswa eMntla Melika, kunye ne-BSP (i-British Standard Pipe), eqhelekileyo kuyo yonke indawo. Ukwazi ukuba yeyiphi ingingqi oyisebenzisayo linyathelo lokuqala kuqhagamshelo olungqina ukuvuza.

Ukufumana uhlobo lwentambo ngokufanelekileyo yenye yezona ndawo zisisiseko, kodwa zibalulekile, iindawo zokukhangela. Ndakhe ndasebenza noBudi, umphathi wokuthenga e-Indonesia, owathi ngempazamo waodola isingxobo sevalvu enemisonto ye-NPT endaweni ye-Umgangatho we-BSPesetyenziswa kwilizwe lakhe. Yayiyimpazamo nje eyayibangela intloko ebuhlungu. Imisonto ibonakala ifana, kodwa ayihambelani kwaye iya kuvuza. Ngaphaya kwemisonto, kukho ezinye iintlobo zoqhagamshelo njengesokethi kunye neflange ezisombulula iingxaki ezahlukeneyo. Masiqinisekise ukuba ungazahlula zonke.

Ithetha ukuthini i-NPT kwivalve yebhola?

Ubona "NPT" kwiphepha elithile kwaye ucinge ukuba ngumsonto oqhelekileyo. Ukungahoyi le nkcukacha kunokukhokelela kunxibelelwano olubonakala luqinile kodwa luvuza phantsi koxinzelelo.

I-NPT imileyeNational Pipe Taper. Igama eliphambili ngu "taper." Imisonto ineengile kancinane, ngoko ke iyadibana njengoko uyiqinisa ukwenza itywina elomeleleyo lomatshini.

Uyilo olucekethekileyo luyimfihlo emva kwamandla okutywina e-NPT. Njengendoda ye-NPT yesikrufu sombhobho ephothiweyo kwi-NPT yowesifazane efaka, idiameter yamalungu omabini iyatshintsha. Olu ngenelelo luyityumza imisonto kunye, yenze itywina lokuqala. Nangona kunjalo, le ntsimbi-on-metal okanye iplastiki-kwiplastiki deformation ayigqibelelanga. Kuhlala kukho izikhewu ezijikelezayo ezincinci ezishiyekileyo. Yiyo loo nto kufuneka usoloko usebenzisa isitywini sentambo, njenge PTFE tape okanye umbhobho dope, ngodibaniso lweNPT. Isitywina sigcwalisa ezi zithuba zincinci ukwenza unxibelelwano lungqine ukuvuza ngokwenene. Lo mgangatho ukhonya eUnited States naseCanada. Kubathengi bamazwe ngamazwe abafana noBudi, kubalulekile ukukhankanya “i-NPT” kuphela xa beqinisekile ukuba iprojekthi yabo iyayifuna; ngaphandle koko, bafuna umgangatho we-BSP oqhelekileyo e-Asia naseYurophu.

Zeziphi iintlobo ezahlukeneyo zokudityaniswa kweevalvu?

Kufuneka udibanise i-valve kumbhobho. Kodwa ubona iinketho "zomsonto," "isokethi," kunye "neflanged," kwaye awuqinisekanga ukuba yeyiphi elungele umsebenzi wakho.

Iindidi ezintathu eziphambili zoqhagamshelo lwevalvu zithungelwa kwimibhobho ekrufulwe, isiseko semibhobho yePVC encamatheleyo, kunye neflanged kwiinkqubo zemibhobho emikhulu ebholitiweyo. Nganye yenzelwe imathiriyeli yombhobho eyahlukileyo, ubukhulu, kunye nesidingo sokugcinwa.

Ukukhetha uhlobo loqhagamshelwano olululo lubaluleke kakhulu njengokukhetha ivalve elungileyo. Azitshintshi. Ngamnye usebenzela injongo eyahlukileyo kwaye ulungele usetyenziso olwahlukileyo. Zicinge njengeendlela ezahlukeneyo zokujoyina indlela.Imidibaniso enemisontozifana nesiphambuka esisemgangathweni,imidibaniso yesokhethizifana nokudityaniswa okusisigxina apho iindlela ezimbini ziba nye, kwaye imidibaniso eneflang ifana necandelo lebhulorho elinokutshintshwa ngokulula. Ndihlala ndicebisa iqela likaBudi ukuba likhokele abathengi babo ngokusekelwe kwikamva lenkqubo yabo. Ngaba ngumgca wokunkcenkceshela osisigxina ongenakuze uguqulwe? Sebenzisa i-socket weld. Ingaba luqhagamshelo kwimpompo enokufuna ukutshintshwa? Sebenzisa ivalve enemisonto okanye eneflang ukuze ususwe lula.

Iintlobo zoQhagamshelo lweValve engundoqo

Zeziphi ezi ntlobo zine zeevalvu zebhola?

Ubeva abantu bethetha ngeevalvu “zesiqwenga esinye,” “iziqwenga ezibini,” okanye “iziqwenga ezintathu”. Oku kuvakala kubhidekisa kwaye unexhala lokuba uthenga engalunganga kuhlahlo lwabiwo-mali lwakho kunye neemfuno zokulondolozwa.

Iivalve zeBhola zihlala zihlelwa ngokwezakhiwo zazo zomzimba: Iqhekeza elinye (okanye iCompact), amaqhekeza amabini, kunye namaqhekeza amathathu. Olu yilo luchaza ixabiso levalvu kunye nokuba inokulungiswa na.

Ngelixa abantu ngamanye amaxesha bekhankanya iintlobo ezine, iindlela ezintathu zokwakha eziphambili zigubungela phantse zonke izicelo. AIvalve ye "Iqhekeza-nye"., edla ngokubizwa ngokuba yi-Compact valve, inomzimba owenziwe ngeqhekeza elinye leplastiki ebunjiweyo. Ibhola itywinwe ngaphakathi, ngoko ayinakuhluthwa ukuze ilungiswe. Oku kuyenza ibe yeyona ndlela inexabiso eliphantsi, kodwa iyalahlwa. Ivalve "eZimbini-ezimbini" inomzimba owenziwe ngamalungu amabini ajikelezisa ibhola. Olu lolona hlobo luqhelekileyo. Inokususwa kumbhobho kwaye ihlulwe ukuze ithathe indawo yezitywina zangaphakathi, inikezela ibhalansi elungileyo yeendleko kunye nokusebenza. Ivalve "ye-Three-Piece" yeyona iphambili. Inomzimba osembindini oqulathe ibhola, kunye neziqhagamshelo ezimbini ezihlukeneyo. Olu luyilo lukuvumela ukuba ususe umzimba oyintloko ukulungiswa okanye ukutshintshwa ngaphandle kokusika umbhobho. Yeyona ibiza kakhulu kodwa ilungele imigca yasefektri apho ungenakho ukuhlawulela ukuvalwa okude ukuze kugcinwe.

Yintoni umahluko phakathi kwe-NPT kunye noqhagamshelwano lweflange?

Uyila isixokelelwano kwaye kufuneka ukhethe phakathi kwevalvu ephothiweyo okanye ephothiweyo. Ukufowuna ngendlela engeyiyo kunokwenza ukuba ufakelo lube liphupha elibi kunye nokugcina imali eninzi kakhulu endleleni.

Uqhagamshelo lwe-NPT luthungelwe kwaye lungcono kwimibhobho emincinci, ukwenza udibaniso lwesimbo esisisigxina ekunzima ukusisebenzisa. Ukudityaniswa kwe-Flange kusebenzisa iibholiti kwaye zilungele imibhobho emikhulu, evumela ukususwa kwevalve lula ukugcinwa.

Ukukhetha phakathi kwe-NPT kunye ne-flange ngenene kwehla kwizinto ezintathu: ubungakanani bombhobho, uxinzelelo, kunye neemfuno zokulondolozwa. Imisonto ye-NPT ilungile kwimibhobho edayamitha emincinci, eyi-intshi ezi-4 nangaphantsi. Ziyindleko kwaye zidala isitywina esinamandla kakhulu, uxinzelelo oluphezulu xa lufakwe ngokuchanekileyo kunye ne-sealant. Ingxaki yabo enkulu kukulondoloza. Ukutshintsha ivalve ene-threaded, kaninzi kufuneka unqumle umbhobho. Iiflange ziyisisombululo semibhobho emikhulu kunye nakweyiphi na inkqubo apho ukugcinwa kubaluleke kakhulu. Ukubhobhoza ivalve phakathi kweeflange ezimbini kuvumela ukuba isuswe kwaye itshintshwe ngokukhawuleza ngaphandle kokuphazamisa imibhobho. Yiloo nto abaxumi bekontraka bakwaBudi abakha iindawo ezinkulu zokucocwa kwamanzi baphantse ba-odole iivalvu ezine-flanged. Babiza ngaphezulu kwangaphambili, kodwa bagcina ixesha elininzi kunye nomsebenzi ngexesha lokulungiswa kwexesha elizayo.

NPT vs. Uthelekiso lweFlange

Ukuqukumbela

Ukukhetha umsonto ochanekileyo okanye uqhagamshelo-i-NPT, i-BSP, i-socket, okanye i-flange-lelona nyathelo libaluleke kakhulu lokwakha inkqubo ekhuselekileyo, yokuvuza kunye nokuqinisekisa ukulondolozwa okulula kwexesha elizayo.