DN, inches, Φ ʻekolu manaʻo a me nā ʻokoʻa i ka ʻoihana valve

I loko o ka pipeline paipu paipu kiwipa pumps a me ka 'ē aʻe hoʻolālā a kūʻai mai mākou pinepine halawai DN, iniha ", Φ a me nā 'āpana 'ē aʻe, he nui na hoa (ʻoi aku ka nui hou i ka 'oihana kāmaʻa) no keia huikau, hiki ole hoʻokaʻawale i ke kumu hoʻohālike, i keia la makou. e hōʻuluʻulu i ka hōʻuluʻulu o nā ʻāpana ʻekolu o ka ʻāpana kikoʻī kikoʻī.

1.DN
"DN" nui na makamaka i kuhi hewa i ke anawaena o loko, oiaio DN a me ka anawaena o loko o kekahi kokoke, aka kokoke wale, kona ano maoli o ka pipeline, paipu, fittings nominal anawaena, nominal anawaena (Nominal Diameter), no hoi i ikeia me ka awelika anawaena waho (Mean Outside Diameter), ʻoiaʻiʻo, aneane he awelika anawaena o waho.

I loko o ka waiwai DN home ka mea maʻamau loa, akā i ka pipeline, paipu a me nā ʻāpana valve hiki ke hōʻike wale i kahi ʻāpana, no ke aha he ʻāpana o ia?No ka mea i loko o ka ʻōnaehana pipeline home, hiki ke loaʻa ʻelua ʻano o ke anawaena o waho i ka paipu DN i kaha ʻia (Φ ke anawaena o waho o ka paipu a i ʻole pipeline, e wehewehe mākou ma hope), e like me DN100, aia nā pūʻulu I a me nā pūʻulu II (ʻo ia hoʻi. pono e kaha i ka mo'o A a me ka mo'o B), 'o I mo'o a me A mo'o o DN100 he Φ114.3, a'o ka mo'o II a me ka mo'o B o DN100 he Φ108.Inā ʻaʻole ʻoe e hōʻike i ke anawaena o waho o ka paipu Φ ma hope o DN i ka wā e hōʻike ana i ka hoʻolālā a me nā kikoʻī, pono ʻoe e hoʻomaopopo inā ʻo I series (A series) a i ʻole II series (B series) i ka wā e kaha ana me DN, no laila ʻo ia. maopopo i ke kaʻina o ke kūʻai ʻana a me ka nīnau, a hiki iā ʻoe ke ʻike i ke ʻano o ka paipu a i ʻole ke anawaena o waho āu e makemake ai me ka ʻole o ka kamaʻilio a me ka hōʻoia.

2. Iniha
ʻO Inch" kahi imperial unit, ka hapanui i hoʻohana ʻia ma ʻAmelika a me ʻEulopa, ʻo ia hoʻi kahi ʻāpana, ʻoiaʻiʻo, aia ka Pipe a me ka paipu Tube, i kēia lā mākou e wehewehe i ka papa Pipe o nā paipu a me nā pono, ma hope e hoʻolauna, Pipe pipe a me Tube ʻokoʻa kikoʻī paipu.

I loko o ka paipu paipu, ʻaʻole like ka ʻīniha DN e hoʻokaʻawale i ke anawaena o waho o nā ʻano paipu ʻelua, he ʻāpana maopopo ia, e like me 4″ i kuhikuhi maopopo ʻia ʻo ia ka anawaena o waho 114.3, a me 10″ ʻo Φ273, no laila e like me ka lōʻihi. ʻO ka paipu a i ʻole nā ​​mea pono i wehewehe ʻia e ka ʻīniha hiki ke ʻike maopopo ʻia me ka ʻole o ka hōʻoia ʻana i ka nui o ke anawaena o waho.

3. Anawaena Φ
ʻO ka hōʻailona o ke anawaena ʻo "Φ", nona ka leka Helene, ʻōlelo ʻia "fai", a he pilina pili loa ia me nā mea ʻelua ma mua, no ka mea hiki ke hoʻololi i nā ʻāpana ʻike ʻelua ma luna, a me ka pipeline a i ʻole ka paipu e hoʻohana ana i ka Φ. ʻo ia ka mea maopopo loa, a ʻo ia ka pololei loa me ka hoʻololi ʻole ʻana, e like me Φ219, Φ508, Φ1020, a pēlā aku.