Hom kev sib txuas: NPT (National Pipe Tapered)
Dab tsi yog NPT Fittings?
NPT kev sib txuas kaw cov kav dej rau cov kua thiab cov pa xa mus. Lawv muaj nyob rau hauv hlau thiab tooj dag rau cov ntawv thov uas tsis tshua muaj siab thiab carbon thiab stainless hlau rau siab dua. Cov yeeb nkab nominal loj tuaj yeem txheeb xyuas los ntawm lub cev ntsuas lub xov kab, tom qab ntawd rho tawm 1/4 ". NPT (los yog National Pipe Taper) yog US tus qauv rau tapered threads dav siv nyob rau hauv cov kav dej thiab fittings rau ntau tshaj 100 xyoo.
NPT kev sib txuas cia siab rau cov xov deformation- ib qho hlau rau hlau sealing tsim qhov twg cov xov ntawm cov connectors lawv tus kheej tsim ua ke. Qhov kev tsim no yog qhov zoo tshaj plaws rau ib daim ntawv thov sib dhos thiab tsis pom zoo qhov twg cov kev sib txuas yuav raug sib sau ua ke thiab disassembled nquag vim hnav ntawm cov xov los ntawm deformation.
Qhov tsis zoo ntawm kev siv NPT Fittings:
Nws tuaj yeem ua rau qhov chaw nres nkoj nthuav dav lossis tawg los ntawm kev nruj dua
Nws tuaj yeem ua rau nws nyuaj rau kev ua kom zoo zoo li cov khoom sib txuas
Xov lubricant xav tau tuaj yeem ua rau muaj kab mob sib kis
Tsis haum rau qhov siab tshaj plaws
Sealing kev ua tau zoo txo qis sai nrog kev rov ua dua thiab qhov loj dua yog qhov yooj yim dua rau cov dej ntws vim yog txoj kev xau loj
Qhov zoo ntawm Kev Siv NPT Fittings:
Muaj txaus
Tuaj hauv ntau qhov ntau thiab tsawg, cov duab, kev sib txuas thiab cov khoom siv
Siv dav thiab paub zoo
Muab cov khoom sib dhos yooj yim yam tsis muaj cov hlab ntsha, siv lub tes tsho, lossis qhia cov ntsaws ruaj ruaj lossis o-rings
NPTF thiab NPSM Xov Styles
Ob qhov kev hloov pauv ntau tshaj plaws ntawm cov yeeb nkab xov txheem no yog NPTF thiab NPSM xov qauv.
Qhov twg ib txwm NPT threads muaj ib qho me me ntawm cov crest thiab cov hauv paus hniav ntawm mating threads xav tau kev siv sealant, NPTF xov hauv paus tsis tso cai rau qhov kev tshem tawm no. Nws tiv tauj thiab deforms mating xov crest. NPTF, los yog National Pipe Taper Roj, kev sib txuas style yog siv dav hauv cov tshuab hluav taws xob. Hom connector no yog tsim los muab cov xov qhuav foob. Txawm li cas los xij, lubricant feem ntau tseem siv los ua kom yooj yim sib dhos.
NPSM, los yog National Pipe Straight Mechanical threads, kuj tseem pom muaj nyob rau hauv cov kua fais fab. Cov poj niam tivthaiv suav nrog cov xov ncaj, uas tsis yog-tapered nrog ib qho inverted 30 degree chamfer ntawm tus txiv neej connector ntawm lub rooj zaum ntawm tus poj niam. Qhov no yog lub tshuab foob. Yog hais tias thiab NPTF txiv neej yog chamfered kom zoo nws tseem yuav zaum nrog NPSM poj niam kev twb kev txuas. Lawv yog tshwj xeeb tshaj yog haum rau manufacturers thiab cov neeg siv kawg uas cia siab rau versatility.
NPT style threads zoo ib yam li BSP, qee yam DIN style, thiab lwm yam tsis yog-US xov xwm. Txawm hais tias pom kev zoo sib xws, qhov sib txawv ntawm cov xov qhov ntev, lub suab thiab lub kaum ntse ntse ua rau lawv tsis sib xws, yog li kev saib xyuas yuav tsum tau coj los txheeb xyuas koj qhov kev sib txuas kom zoo los tsim kom muaj kev ruaj ntseg thiab xau resistant seal.
