Yintoni kanye kanye umahluko phakathi kwemigangatho yemisonto ye-NPT, BSP kunye ne-G?

Owona ‘mngxunya’ ongahoywanga ngokulula ekukhetheni iivalvu kunye nezinto zokufakelwa

Kwimibuzo emininzi yabathengi, sihlala sidibana neemeko ezinje:

"Ndifuna ivalve enemisonto yabasetyhini kuzo zombini iziphelo."

“Kunjalo, ngowuphi umgangatho owufunayo womsonto?”

Umsonto nje oqhelekileyo-ofana nakumbhobho wamanzi.

Olu hlobo lwencoko lwenzeka phantse veki nganye. Ukukhetha umgangatho wentambo engalunganga yenye yezona zinto zixhaphakileyo kwaye zinexabiso elikhulu ekuthengeni ivalvu. Ukuba i-valve ayikwazi ukufakwa emva kokuthenga, okanye ukuba ifakwe kodwa iyasilela ukutywinwa ngokufanelekileyo, okukhokelela ekuvuzeni, iziphumo zivela ekulibazisekeni okuncinci ukuya kwisidingo sokuphinda kusetyenzwe yonke inkqubo.

Namhlanje, kweli nqaku lifutshane, siza kucacisa kube kanye kuyo yomithathu imigangatho ebhideke kakhulu: NPT, BSP kunye neG.、、

I. Masiqale ngowona mahluko usisiseko: enye 'yi-cone', enye 'yi-cylinder'.

Oku kwenza isiseko sokuqonda zonke ezinye iiyantlukwano.

Uhlobo lomsonto

Uhlobo lomsonto	Igama eliphelele	I-engile yokukhokela	Ulwakhiwo	Indlela yokutywina
NPT	Umsonto weMibhobho eTapered waseMelika	60°	Umsonto ochwetheziweyo (1:16 taper)	Itywinwe ngomsonto ngokwawo
I-BSPT (inxalenye yoluhlu lwe-BSP)	Umsonto woMbhobho oMgangatho waseBritani oTapered	55 °	Umsonto ochwetheziweyo (1:16 taper)	Itywinwe ngomsonto ngokwawo
G (inxalenye yoluhlu lwe-BSP)	Umsonto woMbhobho wePrismatic oMgangatho waseBritani (BSPP)	55 °	Umsonto weCylindrical (akukho taper)	Itywinwe ngesiphelo sobuso okanye i-gasket
BSP	Umsonto woMbhobho oMgangatho waseBritani (ngokudibeneyo)	—	Ibandakanya i-BSPT (i-tapered) kunye ne-BSPP (i-cylindrical)	Kuxhomekeke kuhlobo oluthile

Amaqokobhe enathi:

I-NPT = intambo ye-tapered yaseMelika esemgangathweni

I-BSPT = intambo ye-tapered yaseBritani esemgangathweni

Intambo ye-G (BSPP) = intambo ehambelanayo yaseBritani

Zombini i-NPT kunye ne-BSPT yimisonto e-tapered ene-taper ratio efanayo (1:16), kodwa iyahluka kwi-angle yentambo (NPT yi-60 °, ngelixa i-BSPT i-55 °).

II. Ucazululo oluneenkcukacha: Yintoni i-NPT, i-BSP kunye no-G?

1. Imisonto ye-NPT (uMgangatho waseMelika)

Inombolo yoMgangatho: ASME B1.20.1

Iimpawu: 60 ° i-angle yomsonto, 1:16 taper

Umgaqo wokutywina: Ukutywinwa kuphunyezwa ngokuphazamiseka kokungena kwemisonto ngokwayo; akukho gasket yokutywina efunekayo

Imimandla eqhelekileyo: I-United States, iCanada kunye namanye amazwe alandela inkqubo esemgangathweni yaseMelika

Iimpawu zevalve yebhola eqhelekileyo: 1/4‘NPT, 3/8’ NPT, 1/2” NPT

Qaphela: Imisonto ye-NPT ifuna usetyenziso lwetape ye-PTFE okanye isitywini somsonto; Ukulawula i-torque kubalulekile ngexesha lokuhlanganisana, njengoko ukuqiniswa ngokugqithiseleyo kunokubangela ukuba intambo yowesifazane ihlukane.

2. Imisonto ye-BSP (iMigangatho yaseBritani)

I-BSP ligama eliqhelekileyo elibandakanya iindidi ezimbini, apho abantu abaninzi badla ngokubhidanisa:

I-BSPT (Intambo yombhobho osemgangathweni waseBritani)	G thread / BSPP (British Standard Pipe Thread)
Inani elisemgangathweni	BS 21	I-BS 2779 / ISO 228-1
Iengile yomsonto	55 °	55 °
Ukwakhiwa	Umsonto ochwetheziweyo (1:16 taper)	Umsonto weCylindrical (ongafakwanga tapered)
Indlela yokutywina	Ukuzitywina (kufuna iteyiphu yeTeflon)	Itywinwe ngetywina lobuso (umzekelo, i-O-ring, iwasha eflethi, iwasha yobhedu)
Izicelo eziqhelekileyo	Amazwe ahlangeneyo, iYurophu kunye neendawo zaseAsia	Isetyenziswa kwihlabathi liphela, ngakumbi eYurophu naseAsia
Ubungakanani beValve yeBhola eqhelekileyo	1/4"BSPT,3/8"BSPT,1/2"BSPT	G1/4, G3/8, G1/2

Kulapho olona luvo lungalunganga lulele khona: abantu abaninzi bacinga ukuba 'imisonto ye-BSP iyafana nemisonto ye-G', kodwa oku akuchanekanga ngokupheleleyo. Imisonto ye-G luhlobo lwe-BSP, kodwa i-BSP ikwabandakanya i-BSPT. Imisonto ye-G iyicylindrical, ngelixa imisonto ye-BSPT icuthiweyo; imigaqo yokutywina emva kwezi zimbini zahluke ngokupheleleyo, kwaye akufuneki zisetyenziswe ngokutshintshanayo.

III. Itafile enye yokuqonda zonke iiyantlukwano

Iikhrayitheriya zokuthelekisa	NPT	BSPT	G (BSPP)
Inkqubo esemgangathweni	Umgangatho waseMelika	Umgangatho waseBritani	uMgangatho waseBritani (owaziwayo kumazwe ngamazwe)
Inkangeleko yezinyo	60°	55 °	55 °
Ulwakhiwo	Umsonto ocetyiweyo	Umsonto ocetyiweyo	Umsonto weCylindrical
Taper	1:16	1:16	Akukho nanye
Indlela yokutywina	Umtya wokutywina (usongwe ngeteyiphu yeTeflon)	Umsonto wetywina (ngetephu yeTeflon)	Itywina yobuso (gasket/O-ring)
I'/ kwikhowudi	umz. 1/2" NPT	umz. 1/2" BSPT	umz. G1/2
Ngaba ziyatshintsheka?	Ayinakutshintshelwa kwi-BSP	Ayitshintshi nge-NPT	Ayinakutshintshelwa kwi-BSPT

IV. Ungawubona njani ngokukhawuleza umahluko ekusebenzeni?

Ukuba unesampulu esandleni sakho ngaphandle kwelebhile, ungayichonga ngolu hlobo lulandelayo:

Indlela yoku-1: Jonga iprofayile yomsonto (ifuna igeyiji yomsonto okanye umvavanyi womsonto)

60° iprofayile yomsonto → NPT

55 ° iprofayile yomsonto → BSP uthotho (G okanye BSPT)

Indlela yesi-2: Jonga isakhiwo sokutywina

Thriiads zifuna iteyiphu yeTeflon okanye isitywini → NPT okanye BSPT (imisonto e tapered)

Ifuna iwasha esicaba, i-O-ring okanye iwasha yobhedu → intambo ye-G (imisonto yesilinda)

Indlela yesi-3: Bala inani lemisonto (indlela yoqikelelo olukhawulezayo)

Kubungakanani obufanayo begama, inani lemisonto nge-intshi nganye liyahluka phakathi kwe-NPT kunye ne-BSP. Umzekelo, 1/2":

NPT: 14 imisonto nge-intshi nganye

I-BSP (G/BSPT): Imisonto eyi-14 nge-intshi nganye (obu bukhulu buyafana kuzo zombini, kubenza kube lula ukubhidanisa)

Nangona kunjalo, ku-3/4": i-NPT ineentambo ezili-14 kwaye i-BSP ineentambo ezili-14 (isafana)

Umahluko oyinyaniso ulele kwi-angle yentambo kunye ne-taper, ekunzima ukuyiqonda ngeso lenyama; eyona ndlela ithembekileyo kukusebenzisa igeyiji yomsonto.

Indlela yesi-4: Jonga ilizwe lemvelaphi okanye iimfuno zabathengi

Ukuba umthengi usekelwe e-US kwaye imizobo ichaza i-ASME → NPT

Ukuba umthengi usekelwe eYurophu okanye kwi-Commonwealth kunye nemizobo ichaza i-BS okanye i-ISO → BSP

Ukuba imizobo ichaza ‘G’ elandelwa linani (umz. G1/2) → intambo yesilinda; iwasha iyafuneka

V. Kwenzeka ntoni ukuba kwenziwe ukhetho olungalunganga? (Iimeko zobomi bokwenyani)

Imeko 1: Umenzi wesixhobo esithile uthenge ibhetshi yeevalve zebhola ezine-G1/2 imisonto yangaphakathi, kodwa imisonto yangaphandle kumbhobho womthengi yayiyi-NPT 1/2. Umsebenzi wazama ukujija ivalve ngamandla kangangezihlandlo ezine kodwa akazange akwazi ukuyijika; Ekufakeni amandla angakumbi ngesipanela, imisonto yomzimba wevalvu iyaqhekeka, nto leyo eyenza ukuba yonke ibhetshi yeevalvu ingasebenziseki.

Imeko yesi-2: Ibhubhoratri ifake ivalve yebhola kunye ne-BSPT yangaphandle intambo ukuya kwi-fitting with G internal thread. Ivakale 'ilungile' xa ijikelezwe, kodwa uvavanyo loxinzelelo lwatyhila ukuvuza okuncinci. Kwathatha iintsuku ezintathu zophando ukufumanisa ukuba le misonto ayihambelani—umsonto ocoliweyo wawukrwelwe kumsonto wangaphakathi osisilinda, kunye nemisonto embalwa yokuqala kuphela edibanayo, nto leyo eyakhokelela ekutywinweni okungonelanga.

Isifundo: Xa kufikwa kumba wokudityaniswa kwemisonto, akukho nto ifana ‘nokuvala ngokwaneleyo’. Umahluko we-1 ° nje kwi-engile yomsonto ngumahluko phakathi kokungakwazi ukufaka icandelo kunye nokungakwazi ukuphumeza itywina.

VI. Iingcebiso zokugqibela zokuThenga aBasebenzi kunye neeNjineli

Ngaphambi kokuba wenze iodolo, nceda uqinisekise ukuba uziqinisekisile ezi nkcukacha zintathu zilandelayo:

Umgangatho womsonto (NPT okanye BSP/G?)

Uhlobo lwentambo (i-tapered okanye i-cylindrical?)

Ubungakanani bomsonto (umz. 1/4‘, 3/8’, 1/2”

Qinisekisa ukuba imilinganiselo kwimizobo ichazwe ngokuchanekileyo:

Umgangatho wase-US: bhala i-1/2-14 NPT

Umgangatho we-tapered waseBritani: bhala i-1/2 BSPT

Umgangatho ohambelanayo waseBritani: bhala i-G1/2 okanye i-1/2 BSPP

Awuqinisekanga malunga neenkcukacha zakho zomsonto wombhobho? Silapha ukukunceda ukuba uqinisekise.

Ukuthelekisa imisonto yeyona nto isisiseko-kwaye ithande ukuba neempazamo-inkalo yenkqubo yombhobho. Impazamo enye kumgangatho wentambo inokubangela ukuba ibhetshi yonke yeevalvu ingasebenziseki, okanye ide ikhokelele ekuvuzeni kunye nesidingo sokuphinda kusetyenzwe kuyo yonke inkqubo yombhobho.

Ukuba kunokwenzeka ukuba ube neesampuli ezifana neevalvu zebhola, izifakelo zombhobho okanye iziqhagamshelo, okanye ukuba unomfanekiso womsonto kwaye awuqinisekanga ngomgangatho-nceda uzive ukhululekile ukuzithumela kuthi nangaliphi na ixesha, kwaye siya kukuqinisekisa simahla.

Asikwenzi ‘uqikelelo olurhabaxa’; siwela ireferensi ngokuchasene nemigangatho kwaye sithatha imilinganiselo yokwenyani sisebenzisa iigeji zemisonto ukunika impendulo echanekileyo.

Uqinisekisa njani:

Thatha ifoto ecacileyo yobuso obunemisonto kwaye uyithumele kuthi.

Kulunge ngakumbi ukuba unesampulu yomzimba, njengoko sinokuyilinganisa ngokuthe ngqo usebenzisa igeyiji yomsonto.

Ungaqhagamshelana nathi nge-WeChat, umnxeba okanye i-imeyile (iinkcukacha zoqhagamshelwano): clvy@shenchihb.com

Iintlobo zemisonto sinokubonelela ngazo:

Iivalve zethu zebhola kunye nezixhobo zombhobho zingenziwa ngokwezifiso ukuhlangabezana nemigangatho eyahlukeneyo yentambo, kuquka i-NPT, i-BSPT kunye ne-G (BSPP), ukuqinisekisa umdlalo we-100 yeepesenti kunye nenkqubo yakho yombhobho. Nokuba yeyentengiso yasekhaya okanye ukuthengisa ngaphandle, sinokwenza kwimizobo yakho.

Khetha intambo elungileyo kwaye uphephe iingxaki ezingeyomfuneko. Ukuba awuqinisekanga, yiyekele kuthi ukuyiqinisekisa.