Muaj ntau ntau hom khoom fittings nyob rau hauv cov kua hloov tshuab rau ib qho kev ua tau zoo tsheb. Paub txog qhov sib txawv ntawm cov fittings no yuav txuag tau koj lub taub hau loj hauv txoj kev.
Nws puas zoo li zoo li lub ntiaj teb tag nrho ntawm ib cov kab thiab fittings kuj nce mentsis ntau me ntsis hauv ob peb lub xyoos dhau los? Tsis ntev tas los, txhua yam uas koj yuav tsum nco ntsoov yog tias Fittings tau txawv dua li cov tsheb ntau hauv cov cav fittings. Tab sis tam sim no nyob rau hauv Ntxiv rau tapered National yeeb nkab xov (NPT), muaj ncaj qha NPS xov thiab ces ib yam dab tsi hu ua ORB fittings. Peb tau txiav txim siab kom tsis txhob cuam tshuam tag nrho cov ntawv cais no thiab txheeb xyuas seb dab tsi yog mus thiab taw tes rau tej lub tswv yim tseem ceeb txog txoj kev sib txuas thiab sib kho cov tswv yim uas yuav pab tau koj ntxiv sij hawm koj yuav tsum xyuas kom meej tias cov kev sib txuas ntawm cov dej nyob qis qis thiab tsis pub dawb. Nws yooj yim dua qhov koj xav tau.
Ua ntej, nws yog qhov tseem ceeb kom paub txog qee cov ntsiab lus ntawm cov khoom koj yuav tsum nco ntsoov thaum nws los txog sij hawm los tsim cov roj cov kab lossis cov kev sib txuas lus kom txias. Ua ntej tshaj plaws, cia peb paub tseeb tias qhov kev sib tham no yog txhua yam hais txog kev fittings rau roj los yog roj fittings. Nws yog ib lub ntsiab lus tseem ceeb los mus rau hauv cov ntsia hlau ntsia los yog nres cov fittings. Peb mam li cawm cov neeg sib tham.
Qhov nrov tshaj plaws tsheb sealing fittings ntiav yog dab tsi yog hu ua National Thread Threads (NPT). Muaj coob leej ntseeg tias NPT sawv cev rau National Tub Yeeb Nkab Taper vim hais tias cov threads raug tapered ntawm 2-degree lub kaum ntse ntse, tab sis qhov taw qhia tseem ceeb yog tias cov yeeb nkab xov siv qhov kev sib tham no los pab khi txoj kev txuas. Tshawb qhov ntev yuav yog qhov teeb meem vim hais tias qhov loj me me - xws li ¼-inch yeeb nkab thread - txhais tau hauv lub cev (ID) ntawm cov yeeb nkab, tsis yog sab nraum kab (OD) ntawm cov phom. Yog tias koj kawm daim ntawv qhia me me rau ib pliag lossis ob, nws yuav pib ua haujlwm.
Tsawg tshaj yog lub teb chaws Ncab Txoj Kev Ncaj Ncees (NPS) fittings uas qee zaum hu ua National Lub Ncauj Ncauj Ncaj Qwj Dag. Cov xov no, raws li koj tuaj yeem twv, muab tib cov xov suab ua NPT threads tiam sis yog ncaj - tsis tapered. Qhov no txhais tau tias 3/8-nti NPS poj niam txoj hlua tuaj yeem kam txais 3/8-nti txiv NPT haum. Qhov no tsis txhais tau hais tias lawv yog cov sib txawv tshaj, tab sis nyob rau hauv ib lub pinch, NPT thread yuav khi thaum nrog cov sealer los yog Teflon daim kab xev. Thaum no yog ib qho xov nraim, koj yuav tau khiav dhau nws yam tsis paub nws. Raws li tus piv txwv, GM 4L80E, four-speed automatic overdrive kis tau siv poj niam NPS threads nyob rau hauv cov ntaub ntawv kis mus rau mount lub adapter fittings rau cov kab txias zog. Thaum lub caij nplooj ntsa iv NPT ¼-nti yuav ua hauj lwm hauv daim ntawv thov no, qhov tsim nyog yuav yog ib lub hnab li N ¼ nti nrog lub sealing O-ring.
Qhov no coj peb mus rau qib tom ntej ntawm cov kua hloov khoom siv fittings uas yog ua nce nrov tshwj xeeb tshaj yog nrog roj tub systems. Koj tuaj yeem pom cov references rau ORB fittings - uas yog rau O-ring boss fittings uas, zoo ib yam li NPSM haum, siv ib txoj hlua sib txuas nrog cov roj hmab nitrile lossis Viton roj hmab O-nplhaib tso rau ntawm tus txiv neej Ib lub xov haum. Qhov O-ring ntsaws qhov sib txuas thiab yog ib qho yooj yim heev rau kev pab cuam yuav tsum muaj kev paug.
Qhov chaw nrov tshaj plaws rau cov khoom siv hluav taws xob yog ORB fittings yog muaj cov twj siv hluav taws xob, cov twj, thiab cov ntxaij lim dej. Qhov kev tsim no muaj qhov kom zoo ntawm qhov loj me me kom loj txaus siv qhov loj O-ring sealing hniav uas tau yooj yim yoog. ORB fittings siv tus txheej txheem ib qho xov loj thiab suab teeb meem kom xaiv qhov me me kom yooj yim. Yog tias koj tab tom sim los txiav txim seb qhov loj ntawm ib tug poj niam OrB txuas, piv txwv, cia li xov rau ib tug txiv neej IB haum. Piv txwv, koj cov roj tswj ceev muaj qhov loj poj niam thiab koj yuav tsum tau txiav txim siab nws txoj kev loj los ntawm ORB. Cov feem nrov ntawm cov no yog -8 los yog -10. Nrhiav ib tug -8 tus txiv neej IB haum thiab pom tias nws threads mus rau hauv lub qhov. Yog tias nws fits, ces koj paub tias nws yog ib lub -8 ORB. Yog hais tias lub -8 me me dhau lawm, tej zaum qhov loj yog -10 ORB haum. Koj tseem tuaj yeem siv qhov ntau thiab tsawg ntawm peb cov ntawv fittings uas yog siv.
Kev ua hauj lwm hauv koj lub tsheb yuav ua rau qee zaum muaj qee zaum, tshwj xeeb tshaj yog thaum nws los ua cov kev kawm siab. Ua kom tag nrho cov roj thiab cov khoom sib txuas ntawm cov hluav taws sib txuas yog qhov zoo tshaj plaws los ua kom lub neej ua haujlwm zoo dua.
