Qhov txawv ntawm NPT thiab MPT yog dab tsi?
Cov lus luv luv NPT thiab MPT feem ntau tuaj hauv kev sib tham txog ntau yam kev lag luam thiab thaj chaw. Txawm hais tias lawv yuav zoo li zoo sib xws, muaj qhov sib txawv ntawm NPT thiab MPT uas yog qhov tseem ceeb kom nkag siab. Nyob rau hauv tsab xov xwm no, peb yuav delve rau hauv dab tsi teeb tsa ob qhov sib nrug, tshawb nrhiav lawv cov ntsiab lus, kev siv, thiab kev siv thoob plaws ntau yam. Yog li, cia peb pib!
NPT: National Pipe Xov
NPT sawv cev rau National Pipe Thread thiab yog hais txog cov txheej txheem threading uas siv hauv cov kav dej, fittings, thiab li qub. Nws yog dav siv nyob rau hauv North America thiab suav hais tias yog tus qauv xov hom rau kev koom tes hauv cov kav dej thiab lwm yam kev lag luam. NPT threads yog tapered thiab tsim los tsim ib lub kaw ntom nti ntawm cov khoom thaum txuas nrog.
Lub NPT system ua raws li cov txheej txheem ntawm qhov ntev thiab cov xov lub kaum sab xis, ua kom muaj kev sib raug zoo ntawm ntau yam khoom los ntawm cov tuam txhab sib txawv. Cov qauv no tso cai rau kev hloov pauv yooj yim ntawm cov khoom sib txuas thiab ua kom yooj yim rau kev saib xyuas thiab kho cov txheej txheem. NPT threads feem ntau yog siv nrog cov ntaub ntawv xws li hlau thiab yas, ua rau lawv muaj ntau yam rau ntau yam kev siv.
MPT: Txiv neej Pipe Thread
Ntawm qhov tod tes, MPT sawv cev rau Txiv neej Pipe Xov. MPT yog ib hom xov uas siv los tsim kev sib txuas rau sab nrauv ntawm cov yeeb nkab lossis cov khoom sib txuas uas tuaj yeem txuas nrog cov xov hlau sib txuas poj niam. MPT yog tsim los kom haum rau hauv cov poj niam xov thiab tsim ib lub foob kaw ntom ntom thaum txuas kom zoo.
MPT threads feem ntau yog cov xov ncaj es tsis yog cov xov tapered zoo li NPT. Cov txiv neej xov ntawm MPT muaj ib qho helical groove sab nraud uas ua kom muaj kev ruaj ntseg thiab tsis muaj kev sib txuas thaum sib txuas nrog cov xov poj niam tsim nyog. Cov xov no feem ntau pom muaj nyob rau hauv cov ntawv thov uas yuav tsum muaj kev sib txuas ntawm txiv neej-rau-poj niam, xws li hauv cov kav dej, tsheb, thiab hydraulic systems.
Qhov txawv ntawm NPT thiab MPT
Tam sim no peb muaj kev nkag siab luv luv ntawm NPT thiab MPT cia peb hais txog qhov sib txawv tseem ceeb ntawm ob:
1. Xov hom:Ib qho ntawm qhov sib txawv ntawm NPT thiab MPT yog lawv hom xov. NPT xov yog tapered, thaum MPT threads ncaj. Qhov sib txawv ntawm kev tsim no cuam tshuam li cas cov xov txuas nrog ib leeg thiab hom foob lawv tsim.
2. Sealing Mechanism:Vim lawv cov qauv tsim, NPT threads tsim ib lub foob kaw ntom nti los ntawm kev tso cai rau cov xov kom sib sib zog nqus thaum nruj. Hauv qhov sib piv, MPT threads cia siab ntau dua rau kev siv cov txheej txheem sealing sab nraud, xws li gaskets lossis sealants, kom muaj kev sib txuas tsis muaj dej.
3. Daim ntawv thov:NPT threads feem ntau siv rau hauv cov ntawv thov uas tsis tshua muaj siab, tshwj xeeb tshaj yog nyob rau hauv cov kav dej. Lawv cov qauv tapered ua rau lawv tsim nyog rau kev tsim cov ntsaws ruaj ruaj hauv cov kav dej, fittings, thiab li qub siv hauv cov kav dej hauv tsev thiab kev lag luam. MPT threads, nrog rau lawv cov qauv ncaj nraim, feem ntau pom muaj nyob rau hauv cov ntawv thov uas muaj kev ntxhov siab ntau dua, xws li cov tshuab hydraulic lossis cov roj sib txuas.
4. Interchangeability:NPT threads, ua qauv, xyuas kom muaj kev sib raug zoo thiab kev sib hloov ntawm cov khoom los ntawm cov tuam txhab sib txawv. Qhov no tso cai rau kom yooj yim hloov thiab kho cov kav dej. Nyob rau hauv sib piv, MPT threads yuav txawv nyob rau hauv cov nqe lus ntawm qhov ntev thiab xov suab, ua rau nws tseem ceeb heev rau xaiv cov txiv neej thiab poj niam threads los ntawm tib lub chaw tsim tshuaj paus los yog xov specification.
5. Xov Engagement:Txoj kev NPT thiab MPT xov sib koom ua ke kuj txawv heev. Hauv NPT threads, cov khoom sib txuas yuav tsum tau ua tib zoo nruj kom tau txais lub foob kom raug, vim tias kev nruj dhau tuaj yeem ua rau cov xov tapered puas. MPT threads, ua ncaj, muaj kev sib koom ua ke yooj yim dua, feem ntau yuav tsum muaj kev sib koom tes tag nrho rau kev sib txuas ruaj ntseg.
Nws yog ib qho tsim nyog sau cia tias thaum NPT thiab MPT tau siv dav hauv North America, lwm cov qauv xov xov tau nthuav dav thoob ntiaj teb. Piv txwv li, cov teb chaws xws li United Kingdom feem ntau siv British Standard Pipe (BSP) threads, uas yog tib yam es tsis yog tapered.
Xaus
Hauv kev xaus, NPT (National Yeeb Nkab Xov) thiab MPT (Txiv Neej Yeeb Nkab Xov) yog ob lub xov tooj sib txawv siv hauv ntau qhov kev lag luam. NPT threads yog tapered thiab feem ntau yog siv nyob rau hauv low-pressure kav dej daim ntaub ntawv, thaum MPT threads yog ncaj thiab feem ntau ua hauj lwm nyob rau hauv high-pressure systems. Kev nkag siab txog qhov sib txawv ntawm NPT thiab MPT yog qhov tseem ceeb rau kev xaiv cov khoom tsim nyog thiab ua kom muaj kev sib txuas kom raug thiab tsis muaj paug. Yog li, lwm zaus koj ntsib cov lus luv luv no, koj yuav tau ua tub rog nrog kev paub kom paub qhov txawv ntawm lawv.