He aha ka CV (ka nui o ke kahe ʻana) o nā kiwikā honua

He aha ke koina kahe o kahi valve poepoe

ʻO ke koina kahe (waiwai Cv) o kahi valve globe ma waena o kekahi mau a me nā kakini, a ʻokoʻa ke kumukūʻai kikoʻī ma muli o ke anawaena maʻamau o ka valve, ke ʻano, ke ʻano o ke kumu valve, ka mea noho valve a me ka pololei o ka hana ʻana. Eia kekahi mau pae kokoke i nā kūlana maʻamau:

1. Ma ke anawaena inoa

Kiwikā poepoe liʻiliʻi ke anawaenaʻO ka waiwai Cv o kahi kiwikā poepoe liʻiliʻi me ke anawaena ma waena o 1/2 ʻīniha (DN15) a me 2 ʻīniha (DN50) ma waena o 2.5 a me 20. No ka laʻana, ʻo ka waiwai Cv o kahi kiwikā poepoe 1/2 ʻīniha (DN15) ma kahi o 2.5 a 4 paha, ʻo ka waiwai Cv o kahi kiwikā poepoe 1 ʻīniha (DN25) ma kahi o 6 a 10 paha, a ʻo ka waiwai Cv o kahi kiwikā poepoe 2 ʻīniha (DN50) ma waena o 12 a me 20 paha.

Kiwikā poepoe waena anawaenaNo nā kiwikā poepoe waena-waena me ke anawaena maʻamau o 2-1/2 ʻīniha (DN65) a i 6 ʻīniha (DN150), ʻo ka waiwai Cv maʻamau ma waena o 20 a me 60. No ka laʻana, ʻo ka waiwai Cv o kahi kiwikā poepoe 2-1/2 ʻīniha (DN65) ma waena paha o 20 a me 30, ʻo ka waiwai Cv o kahi kiwikā poepoe 4 ʻīniha (DN100) ma waena paha o 35 a me 50, a ʻo ka waiwai Cv o kahi kiwikā poepoe 6 ʻīniha (DN150) ma waena paha o 45 a me 60.

Kiwikā poepoe nui ke anawaenaʻO nā kiwikā poepoe nui me ke anawaena maʻamau ʻoi aku ma mua o 6 ʻīniha (DN150) he nui ko lākou mau waiwai Cv, ma ke ʻano maʻamau ma luna o 60 a 100. No ka laʻana, ʻo ka waiwai Cv o kahi kiwikā poepoe 8 ʻīniha (DN200) ma waena paha o 80 a me 100, a ʻo ka waiwai Cv o kahi kiwikā poepoe 12 ʻīniha (DN300) ma waena paha o 120 a me 150 a ʻoi aku paha.

2. Ma ke ʻano hoʻonohonoho

Kiwikā pololei ma o ka honuaʻO ke kiʻekiʻe o ka waiwai Cv, ma ke ʻano maʻamau ma kahi pae waena ma waena o nā kiwikā poepoe o ke anawaena like. No ka laʻana, ʻo ka waiwai Cv o kahi kiwikā poepoe pololei DN50 ma kahi o 10 a 15, a ʻo ka waiwai Cv o kahi kiwikā poepoe pololei DN100 he 30 a 40 paha.

Kiwikā poepoe kihiNo ka mea, he ʻano ʻinoʻino kona ala kahe a he nui ke kūʻē ʻana o ke wai, ʻoi aku ka haʻahaʻa o ka waiwai Cv ma mua o ka valve globe pololei. ʻO ka waiwai Cv o kahi valve globe kihi DN50 ma kahi o 8 a 12 paha, a ʻo ka waiwai Cv o kahi valve globe kihi DN100 ma kahi o 25 a 35.

3. Ma ke ʻano o ke kumu valve

kiwikā palahalaha kiwikā koʻikoʻi poepoe honuaHe kiʻekiʻe iki ka waiwai Cv, no ka laʻana, ʻo ka waiwai Cv o kahi valve globe core valve pālahalaha DN100 he 40 a 50 paha.

Kiwikā Conical kiwikā honua koʻikoʻiMa muli o ka pili kokoke ʻana ma waena o ke kumu valve a me ka noho valve, ʻoi aku ka maikaʻi o ka hana sila, akā he nui ke kūpaʻa o ke kahe, a he haʻahaʻa ka waiwai Cv. ʻO ka waiwai Cv o ka valve globe core valve conical DN100 ma waena o 30 a me 40.

4. Wahi a ka mea noho valve a me ka pololei o ka hana ʻana

Kiwikā noho kiwikā metala: He paʻakikī kiʻekiʻe ka noho kiwikā metala a he kūpaʻa maikaʻi hoʻi i ka ʻaʻahu ʻana, akā kiʻekiʻe nā koi pololei o ka hana ʻana. Inā kiʻekiʻe ka pololei o ka hana ʻana, hiki i ka waiwai Cv ke piʻi i kahi kiʻekiʻe o ke ʻano kiwikā like; inā lawa ʻole ka pololei o ka hana ʻana, hiki ke ʻaʻole like ka ʻili sila a e hoʻemi ʻia ka waiwai Cv. No ka laʻana, ʻo ka waiwai Cv o ka kiwikā honua noho kiwikā metala DN80 me ka hana pololei kiʻekiʻe paha ma waena o 30 a me 35, a ʻo ka waiwai Cv o ka pololei o ka hana maʻamau paha ma waena o 25 a me 30.

Kiwikā poepoe noho kiwikā palupaluInā hoʻohana ʻia nā mea palupalu e like me ka polytetrafluoroethylene ma ke ʻano he mau noho valve, maikaʻi ka hana sila, akā hiki i nā mea palupalu ke hoʻololi i ke ʻano ma lalo o ke ana wela kiʻekiʻe a i ʻole ke kaomi kiʻekiʻe, e hoʻopilikia ana i ke koina kahe. Hiki i kahi valve globe noho palupalu DN65 ke loaʻa kahi waiwai Cv ma kahi o 20 a 25.

Hōʻuluʻulu manaʻo

He mea hoʻomalu kahe koʻikoʻi ka valve globe. ʻO kona coefficient kahe he mea nui e wehewehe ana i kona hiki ke kahe a pono e helu pono ʻia a koho ʻia. ʻO ka hoʻomaopopo ʻana i nā mea e hoʻopilikia ai i ka coefficient kahe e hiki ke kōkua i ke koho ʻana i ka valve globe kūpono e hōʻoia i ka hana maʻamau o ka ʻōnaehana.