I-Valve Deameter φ, i-Diameter DN, i-intshi "Ngaba ungahlulahlula ezi candelo lenkcazo?

Kukho rhoqo abahlobo abangabuqondi ubudlelwane phakathi kweenkcazo ze "DN", "Φ"Kwaye" ". Namhlanje, ndiza kushwankathela ubudlelwane phakathi kwabathathu kuwe, ndinethemba lokukunceda!

Yintoni i-intshi "

I-intshi (") yiyunithi esetyenziswayo esetyenzisiweyo kwiNkqubo yaseMelika, enje ngemibhobho yentsimbi,ivali, flans, i-ellows, iimpompo, amashumi, njl njl.

I-intshi (i-intshi, ifinyezwe njengakuyo.) Kuthetha isithupha kwisiDatshi, kunye ne-intshi ubude besithupha. Ewe, ubude besithupha kukwahlukileyo. Kwinkulungwane ye-14, uKumkani uEdward II II wapangelela "i-intshi yezomthetho". Umgaqo kukuba ubude beengqolowa ezintathu ezinkulu ezikhethwe ukusuka embindini weendlebe zebarley kwaye zilungelelaniswe ngokulandelelana yi-intshi enye.

Ngokubanzi 1 "= 2.54Cm = 25.4mm

Yintoni i-DN

I-DN yiyunithi esetyenziswayo esetyenzisiweyo kwi-China nakwiinkqubo zaseYurophu, kwaye kukwayinkqubo yokumakisha imibhobho,ivali, flaxes, i-fittings, kunye neempompo, ezinjeI-DN250.

I-DN ibhekisa kwi-diameter yonyulo yombhobho (okwaziwa ngokuba yi-diameter ye), qaphela: oku akuyongxaki yangaphandle okanye ububanzi bezinto zangaphandle, kodwa ububanzi bomgangatho wangaphakathi, obizwa ngokuba ngumndilili ophakathi wangaphakathi.

Yintoni iΦ

Φ yiyunithi eqhelekileyo, ebhekisele kububanzi bemibhobho yemibhobho, okanye ii-ellows, intsimbi ejikelezileyo kunye nezinye izinto.

Ke kuthetha ntoni phakathi kwabo?

Okokuqala, intsingiselo ephawulwe ngu "" "kwaye" dn "ziphantse zalingana.Φ yindibaniselwano yezi zinto zimbini.

umzekelo

Umzekelo, ukuba umbhobho wentsimbi yi-DN600, ukuba umbhobho ofanayo wentsimbi uphawulwe kwi-intshi, iba yi-24 ". Ngaba lukhona uqhagamshelo phakathi kwezi zimbini?

Impendulo ngu-ewe! I-intshi ngokubanzi yinani elipheleleyo kwaye liphindaphindwe ngokuthe ngqo yi-DN, enje nge-1 "* 25 = 3" * 2-1 / 2 ", 3-1/ / 2" Ke ezinye ezingenakubalwa ngolo hlobo, kodwa ukubala kuyafana, ngokusisiseko ixabiso elichaziweyo:

1/2 "= dn15

3/4 "= DN20

1-1 / 4 "= DN32

I-1-1 / 2 "= DN40

2 "= DN50

I-2-1 / 2 "= DN65

3 "= DN80