Valve lub cheeb φ, uas hla DN, nti "Koj puas tuaj yeem paub qhov tshwj xeeb tshaj tawm no?

Muaj feem ntau cov phooj ywg uas tsis nkag siab txog kev sib raug zoo ntawm cov kev qhia tshwj xeeb ntawm "DN", "Φ"Thiab" "" ". Hnub no, Kuv yuav nthuav qhia qhov kev sib raug zoo ntawm peb rau koj, vam tias yuav pab koj!

Dab tsi yog nti "

Nti (") yog ib qho kev qhia tshwj xeeb hauv Asmeskas system, xws li kav hlau,li qub, Flanges, luj tshib, twj, Tees, thiab lwm yam, xws li cov lus qhia yog 10 ".

Nti (nti, lus luv li nyob rau hauv.) Txhais tau tias tus ntiv tes xoo hauv Dutch, thiab nti nti yog qhov ntev ntawm tus ntiv tes xoo. Ntawm chav kawm, qhov ntev ntawm tus ntiv tes xoo kuj txawv. Nyob rau hauv lub xyoo pua 14, Vaj Ntxwv Edward II tshaj tawm tus qauv "tus qauv raug cai ntiv taw". Tus neeg sab sauv yog tias qhov ntev ntawm peb cov nplej loj tshaj plaws xaiv los ntawm nruab nrab ntawm pob ntseg barley thiab npaj ua ib kab yog ib nti.

Feem ntau 1 "= 2.54cm = 25.4 hli

Dab tsi yog DN

DN yog cov khoom siv tshwj xeeb hauv Suav teb thiab European systems, thiab nws kuj yog cov lus qhia tshwj xeeb rau cov cim roj,li qub, flanges, fittings, thiab twj, xws liDN250.

DN hais txog cov kabinal ntawm cov yeeb nkab (tseem hu ua txoj kab uas hla), qhov no tsis yog lub taub sab hauv thiab sab hauv lub taub.

Dab tsi yogΦ

Φ yog ib chav tsev ib txwm muaj, uas yog hais txog cov taub ntawm cov kav dej, lossis luj tshib, cov hlau hloov mus ntxiv.

Yog li dab tsi yog qhov kev sib txuas ntawm lawv?

Ua ntej tshaj plaws, cov ntsiab lus cim los ntawm "" "thiab" DN "yog yuav luag zoo ib yam. Lawv txhais tau tias yog qhov loj me ntawm qhov kev tshwj xeeb no, thiabΦ yog kev sib xyaw ntawm ob.

Piv txwv

Piv txwv li, yog tias cov yeeb nkab steel yog DN600, yog hais tias tib cov yeeb nkab steel yog cim nyob rau hauv nti, nws ua 24 ". Puas muaj kev sib txuas ntawm ob qho?

Cov lus teb yog yog! Cov nti dav dav yog ib tus lej thiab tsawg dua li ntawm 25 " 2-1 / 2 ", 3-1 / 2" Thiab lwm yam yuav tsis raug suav tias, tab sis qhov kev suav yog ntxig tib yam,

1/2 "= DN15

3/4 "= dn20

1-1 / 4 "= DN32

1-1 / 2 "= DN40

2 "= dn50

2-1 / 2 "= DN65

3 "= dn80