U-ode ukugcwala kweloli kwamavalvu ephrojekthi enkulu. Kodwa lapho zifika, izintambo azifani namapayipi akho, okubangela ukubambezeleka okukhulu kanye nembuyiselo ebizayo.

Izinhlobo ezimbili eziyinhloko zemicu ye-valve yebhola yi-NPT (I-National Pipe Taper) esetshenziswa eNyakatho Melika, kanye ne-BSP (i-British Standard Pipe), evamile yonke indawo. Ukwazi ukuthi iyiphi isifunda sakho esiyisebenzisayo kuyisinyathelo sokuqala soxhumano olungavuzi.

Ukuthola uhlobo lwentambo ngendlela efanele kungenye yezingxenye eziyisisekelo, nokho ezibucayi, zokuthola usizo. Ngake ngasebenza noBudi, umphathi wezokuthenga e-Indonesia, owa-oda ngephutha isiqukathi esinama-valve anezintambo ze-NPT esikhundleni se-I-BSP ejwayelekileesetshenziswa ezweni lakubo. Kwakuyiphutha elilula elibangele ikhanda elikhulu. Izintambo zibukeka zifana, kodwa azihambisani futhi zizovuza. Ngaphandle kwemicu, kunezinye izinhlobo zokuxhuma ezifana nesokhethi ne-flange ezixazulula izinkinga ezahlukene. Masiqinisekise ukuthi ungawahlukanisa wonke.

Isho ukuthini i-NPT kuvalvu yebhola?

Ubona i-“NPT” eshidini elicacisiwe futhi ucabange ukuthi iwuchungechunge nje olujwayelekile. Ukuziba le mininingwane kungaholela ekuxhumekeni okubonakala kuqinile kodwa kuvuza ngaphansi kwengcindezi.

I-NPT imileokweNational Pipe Taper. Igama eliyinhloko lithi "taper." Imicu ine-engeli kancane, ngakho ihlangana ndawonye njengoba uyiqinisa ukuze yenze uphawu oluqinile lomshini.

Idizayini ecijile iyimfihlo yamandla okuvala e-NPT. Njengezikulufu zepayipi elinentambo ye-NPT yesilisa ekulinganeni kwe-NPT yowesifazane, ububanzi bazo zombili izingxenye buyashintsha. Lokhu kuhlanganiswa kokuphazamisa kuchoboza izintambo ndawonye, kwenza uphawu lokuqala. Kodwa-ke, lokhu kuguqulwa kwe-metal-on-metal noma i-plastic-on-plastic akuphelele. Kuhlale kunezikhala ezincane ezizungezayo ezisele. Kungakho kufanele ngaso sonke isikhathi usebenzise isivali ntambo, njengetheyiphu ye-PTFE noma ipayipi lepayipi, enoxhumo lwe-NPT. I-sealant igcwalisa lezi zikhala ezincane kakhulu ukuze yenze uxhumano lungavuzi ngempela. Leli zinga likhona e-United States naseCanada. Kubathengi bamazwe ngamazwe abafana no-Budi, kubalulekile ukucacisa “i-NPT” kuphela uma benesiqinisekiso sokuthi iphrojekthi yabo iyayidinga; ngaphandle kwalokho, badinga indinganiso ye-BSP evamile e-Asia naseYurophu.

Yiziphi izinhlobo ezahlukene zokuxhuma ama-valve?

Udinga ukuxhuma i-valve epayipini. Kodwa ubona izinketho zokuthi “okunentambo,” “isokhethi,” kanye “ne-flanged,” futhi awunaso isiqiniseko sokuthi ikuphi okulungele umsebenzi wakho.

Izinhlobo ezintathu eziyinhloko zokuxhunywa kwamavalvu zithungelwa amapayipi ayisikulufu, isokhethi lamapayipi anamathiselwe e-PVC, futhi aphendulwe amapayipi amakhulu, abhawudiwe. Ngayinye yakhelwe izinto ezihlukile zamapayipi, ubukhulu, kanye nesidingo sokunakekelwa.

Ukukhetha uhlobo lokuxhuma olufanele kubaluleke kakhulu njengokukhetha i-valve efanele. Azishintsheki. Ngayinye inenhloso ehlukile futhi ifanele izinhlelo zokusebenza ezahlukene. Zicabange njengezindlela ezihlukene zokujoyina umgwaqo.Izixhumanisi ezinezintambozifana nomgwaqo ojwayelekile,izixhumanisi zesokhethizifana nokuhlangana okuhlala njalo lapho imigwaqo emibili iba munye, futhi ukuxhuma okunezinhlangothi kufana nengxenye yebhuloho elingashintshwa kalula. Ngihlale ngeluleka ithimba likaBudi ukuthi liqondise amakhasimende abo ngokusekelwe kukusasa lesistimu yabo. Ingabe umugqa wokunisela unomphela ongasoze washintshwa? Sebenzisa isokhethi weld. Ingabe iwuxhumano lwepompo olungase ludinge ukushintshwa? Sebenzisa i-valve enentambo noma ene-flanged ukuze ukhiphe kalula.

Izinhlobo Eziyinhloko Zokuxhuma I-Valve

Yiziphi izinhlobo ezine zamavalvu ebhola?

Uzwa abantu bekhuluma ngamavalvu “ocezu olulodwa,” “ama-two-piece,” noma “ama-three-piece”. Lokhu kuzwakala kudida futhi ukhathazeka ngokuthi uthenga engalungile kubhajethi yakho nezidingo zokunakekela.

Ama-valve ebhola avame ukuhlukaniswa ngokwakhiwa kwemizimba yawo: Ucezu Olulodwa (noma Oluhlangene), Ucezu Olubili, Nocezu Oluthathu. Le miklamo inquma izindleko zevalvu nokuthi ingalungiswa yini.

Nakuba ngezinye izikhathi abantu bekhuluma ngezinhlobo ezine, izitayela ezintathu zokwakha eziyinhloko zihlanganisa cishe zonke izinhlelo zokusebenza. AIvalvu ethi “One-Piece”, evame ukubizwa ngokuthi i-Comact valve, inomzimba owenziwe ngocezu olulodwa lwepulasitiki olubunjiwe. Ibhola livalwe ngaphakathi, ngakho alikwazi ukuhlukaniswa ukuze lilungiswe. Lokhu kuyenza ibe inketho eshibhe kakhulu, kodwa empeleni iyalahlwa. Ivalvu ethi “Two-Piece” inomzimba owenziwe izingxenye ezimbili ezikulungana ndawonye ebholeni. Lolu uhlobo oluvame kakhulu. Ingasuswa epayipini futhi ihlukaniswe ukuze ithathele izigxivizo zangaphakathi, inikeze ibhalansi enhle yezindleko nokusebenza kahle. Ivalvu ethi “Three-Piece” iyona ethuthuke kakhulu. Inomzimba omaphakathi oqukethe ibhola, nezixhumi ezimbili ezihlukene zokuphela. Lo mklamo ikuvumela ukuthi ususe umzimba oyinhloko ukuze ulungiswe noma ushintshwe ngaphandle kokusika ipayipi. Ibiza kakhulu kodwa ilungele imigqa yefekthri lapho ungeke ukwazi ukukhokhela ukuvala shaqa okude ukuze kulungiswe.

Uyini umehluko phakathi kwe-NPT nokuxhumeka kwe-flange?

Uklama isistimu futhi udinga ukukhetha phakathi kwama-valve anentambo noma ane-flanged. Ukushaya ucingo olungalungile kungenza ukufakwa kube yiphupho elibi kanye nokugcinwa kwempahla kubize kakhulu emgwaqeni.

Uxhumo lwe-NPT luluchungechunge futhi lungcono kakhulu kumapayipi amancane, kudala uxhumo lwesitayela esingunaphakade okunzima ukusevisa. Ukuxhunywa kwe-flange kusebenzisa amabhawodi futhi alungele amapayipi amakhulu, okuvumela ukukhishwa kwama-valve kalula ukuze kulungiswe.

Ukukhetha phakathi kwe-NPT ne-flange empeleni kwehlela ezintweni ezintathu: usayizi wepayipi, ukucindezela, nezidingo zokunakekelwa. Izintambo ze-NPT zinhle kakhulu kumapayipi amancane obubanzi, ngokuvamile amayintshi angu-4 nangaphansi. Zingabizi futhi zakha uphawu oluqinile kakhulu, olunomfutho ophezulu uma lufakwe kahle nge-sealant. Ububi bawo obukhulu ukunakekela. Ukushintsha i-valve enentambo, ngokuvamile kufanele usike ipayipi. Ama-Flanges ayisixazululo samapayipi amakhulu kanye nanoma yiluphi uhlelo lapho ukunakekelwa kubaluleke kakhulu. Ukubopha i-valve phakathi kwama-flange amabili kuvumela ukuthi ikhishwe futhi ishintshwe ngokushesha ngaphandle kokuphazamisa amapayipi. Yingakho amaklayenti enkontileka kaBudi akha izindawo ezinkulu zokuhlanza amanzi acishe a-ode ngokukhethekile ama-valve ane-flange. Zibiza kakhulu kusengaphambili, kodwa zonga isikhathi esiningi nomsebenzi ngesikhathi sokulungiswa okuzayo.

I-NPT vs. Ukuqhathaniswa kwe-Flange

Isiphetho

Ukukhetha intambo efanele noma uxhumo—i-NPT, i-BSP, isokhethi, noma i-flange—kuyisinyathelo esibucayi kakhulu sokwakha isistimu evikelekile, engavuzi kanye nokuqinisekisa ukugcinwa okulula kwekusasa.