UL mumavharuvhu

I. Chii chinonzi UL certification? Sei vharuvhu ichiida?

UL (Underwriters Laboratories) isangano rine mukurumbira pasi rose rekuchengetedza rakazvimirira. Mumusika wekuNorth America, UL certification haisi yekumanikidzwa nehurumende, asi i "access card" yekudzivirira moto, gasi, kutonga maindasitiri nedzimwe nzvimbo. Mazhinji mapurojekiti ekuUS anoda pachena kuti "Valve inofanira kunyorwa pasi peUL". Kune mavharuvhu, zvinoratidza kuti chigadzirwa chakasangana nezvinodiwa zvakasimba zvekuchengetedzwa kwemagetsi, njodzi yemoto uye mamiriro ekushanda akaipisisa. Ndiyo nhanho huru yekupinda mumusika wepamusoro muNorth America uye kutora chikamu mukubhidha mapurojekiti.

II.Ndezvipi zviyero zvinonyanya kuenderana neUL certification yemavharuvhu?

Mavharuvhu ezvinangwa zvakasiyana anoshanda kune zviyero zvakasiyana:

- UL 429:Kune mavharuvhu anoshandiswa nemagetsi (akadai semavharuvhu e-solenoid), ongororai kuvharwa kwawo kwemagetsi, kukwira kwekupisa, hupenyu hwemakoira, nezvimwewo.

- UL 842:Mavharuvhu ekushandisa nemaoko, ekumanikidza kana ekudzora tembiricha anofukidza mvura dzinobvira uye dzinobvira (peturu, dhiziri, mafuta, nezvimwewo).

- Mavharuvhu emoto: mavharuvhu egedhi, mavharuvhu eshavishavi, vharuvhu yekutarisanezvimwewo zvinofanirwa kutevedzera UL 262, UL 1091 nedzimwe mitemo, uye kuyedza kunosanganisira kutevedzera kumanikidzwa kwakanyanya uye nharaunda yemoto. Pamusoro pezvo, kune mitemo yakakosha yakaita seUL 842B yemavharuvhu edhiziri/biodiesel.

III.Chii chinonyanya kutariswa pakuyedzwa kweUL certification?

Chinhu chikuru ndechekuona "kuchengetedzeka kwakanyanya". Pamusoro pekusagona kumanikidzwa uye kuvharwa, kutarisisa kwakakosha kunofanirwa kupihwa kune:

- Kuchengetedzwa kwemagetsi:kuputira coil, nzira dzekukundikana, kurasikirwa nemamiriro emagetsi.

- Mamiriro ekushanda akanyanya:kugona kushanda uye kukwegura kwezvinhu mukati mekupisa kuri pakati pe -29°C kusvika 52°C.

- Kukundikana kwakachengeteka:inotevedzera njodzi yekusashandiswa zvakanaka kana kukwegura kwezvinhu.