Chii chinonzi CV (flow coefficient) yemavharuvhu eglobe?

Chii chinonzi flow coefficient ye globe valve

Kuyerera kwemvura (Cv value) kwevharuvhu yepasi rose kunowanzova pakati pemashoma negumi nemaviri, uye kukosha kwayo kunosiyana zvichienderana nedhayamita yevharuvhu, chimiro chayo, rudzi rwepakati pevharuvhu, zvinhu zvechigaro chevharuvhu uye kunyatsogadzirwa kwayo. Izvi zvinotevera mamwe maerekitironi anofungidzirwa mumamiriro ezvinhu akafanana:

1. Nedhayamita yezita

Vharuvhu yepasi pedhayamita diki: Kukosha kweCv kwevharuvhu diki ine dhayamita pakati pe 1/2 Inch (DN15) ne 2 Inch (DN50) kazhinji kuri pakati pe 2.5 ne 20. Semuenzaniso, kukosha kweCv kwevharuvhu diki ye 1/2 Inch (DN15) kunogona kunge kuri pakati pe 2.5 ne 4, kukosha kweCv kwevharuvhu diki ye 1 Inch (DN25) kungangove kuri pakati pe 6 ne 10, uye kukosha kweCv kwevharuvhu diki ye 2 Inch (DN50) kungangove pakati pe 12 ne 20.

Vharuvhu yepasi rose yedhayamita yepakati: Kune mavharuvhu epasi ane dhayamita yepakati ane dhayamita yepakati pe 2-1/2 Inch (DN65) kusvika 6 Inch (DN150), kukosha kweCv kunowanzova pakati pe 20 ne 60. Semuenzaniso, kukosha kweCv kwevharuvhu yepasi ye 2-1/2 Inch (DN65) kunogona kuva pakati pe 20 ne 30, kukosha kweCv kwevharuvhu yepasi ye 4 Inch (DN100) kunogona kuva pakati pe 35 ne 50, uye kukosha kweCv kwevharuvhu yepasi ye 6 Inch (DN150) kunogona kuva pakati pe 45 ne 60.

Vharuvhu yeguruva rakakura: Mavharuvhu makuru ane dhayamita yakakura kupfuura 6 Inch (DN150) ane Cv values ​​yakakura, kazhinji iri pamusoro pe60 kusvika 100. Semuenzaniso, Cv value ye8 Inch (DN200) globe valve inogona kunge iri pakati pe80 ne100, uye Cv value ye12 Inch (DN300) globe valve inogona kunge iri pakati pe120 ne150 kana kutopfuura.

2. Nechimiro chechimiro

Vharuvhu yepasi rose yakatwasuka: Kukosha kweCv kwakakwira zvishoma, kazhinji padanho repakati pakati pemavharuvhu eglobe ane dhayamita imwe chete. Semuenzaniso, kukosha kweCv kwevharuvhu yeglobe yakatwasuka yeDN50 inenge iri pakati pe10 kusvika ku15, uye kukosha kweCv kwevharuvhu yeglobe yakatwasuka yeDN100 kunogona kuva 30 kusvika ku40.

Vharuvhu yeAngle: Nekuti nzira yayo yekuyerera inotenderera zvishoma uye kuramba kwemvura kwakakura, kukosha kweCv kwakaderera zvishoma pane kwevharuvhu yeglobe yakatwasuka. Kukosha kweCv kwevharuvhu yeglobe yeDN50 angle kunogona kunge kuri pakati pe8 kusvika 12, uye kukosha kweCv kwevharuvhu yeglobe yeDN100 angle kungangoita 25 kusvika 35.

3. Nerudzi rwevharuvhu

Flat vharuvhu core globe vharuvhu: Kukosha kweCv kwakakwira, semuenzaniso, kukosha kweCv kwevharuvhu yeDN100 flat valve core globe kunogona kuva 40 kusvika 50.

Vharuvhu yepakati pevhu ine denderedzwa remadziro: Nekuda kwekubatana kuri pedyo pakati pevharuvhu nechigaro chevharuvhu, kushanda kwekuvhara kuri nani, asi kuramba kwemvura kwakakura, uye kukosha kweCv kwakaderera. Kukosha kweCv kwevharuvhu yevharuvhu yeDN100 conical valve core globe kunogona kuva pakati pe30 ne40.

4. Zvinoenderana nechinhu chechigaro chevharuvhu uye kunyatsogadzirwa kwacho

vharuvhu yesimbi chigaro chepasi: Chigaro chevharuvhu yesimbi chine kuoma kwakanyanya uye kuramba kupfeka zvakanaka, asi zvinodiwa pakunyatsogadzirisa zvakanyanya. Kana kunyatsogadzira kwakanyanya, kukosha kweCv kunogona kusvika padanho repamusoro revharuvhu imwe chete; kana kunyatsogadzira kusina kukwana, nzvimbo yekuvharira inogona kunge isina kuenzana uye kukosha kweCv kuchaderedzwa. Semuenzaniso, kukosha kweCv kwevharuvhu yevharuvhu yesimbi yeDN80 ine kunyatsogadzirisa kwakanyanya kunogona kunge kuri pakati pe30 ne35, uye kukosha kweCv kwekunyatsogadzirisa kwakajairika kunogona kunge kuri pakati pe25 ne30.

Soft vharafu chigaro globe vharafu: Kana zvinhu zvakapfava zvakaita sepolytetrafluoroethylene zvikashandiswa sezvigaro zvevharuvhu, kushanda kwekuvhara kwacho kwakanaka, asi zvinhu zvakapfava zvinogona kukanganisa kana tembiricha yakakwira kana kumanikidzwa kwakanyanya, zvichikanganisa kuyerera kwemvura. Vharuvhu yeGlobe yakapfava yeDN65 inogona kunge iine Cv value inosvika 20 kusvika 25.

Pfupiso

Vharuvhu yeglobe mudziyo unokosha wekudzora kuyerera kwemvura. Kuyerera kwayo iparameter inokosha inotsanangura kugona kwayo kuyerera uye inofanira kuverengerwa nekusarudzwa zvine musoro. Kunzwisisa zvinhu zvinokanganisa kuyerera kwemvura kunogona kubatsira kusarudza vharuvhu yeglobe yakakodzera kuti ive nechokwadi chekuti system inoshanda zvakanaka.