I-UL kwiiValve

I. Yintoni isiqinisekiso se-UL? Kutheni ivalvu isidinga?

I-UL (Underwriters Laboratories) yintlangano eyaziwayo kwihlabathi liphela yokuqinisekisa ukhuseleko. Kwimarike yaseMntla Melika, isiqinisekiso se-UL asinyanzelekanga ngurhulumente, kodwa "sikhadi lokufikelela" lokukhusela umlilo, igesi, ulawulo lwemizi-mveliso kunye neminye imimandla. Iithenda ezininzi zeprojekthi zase-US zifuna ngokucacileyo ukuba "Iivalufa ziya kudweliswa kwi-UL". Kwiivalufa, kubonisa ukuba imveliso ihlangabezane nemigangatho engqongqo yokhuseleko lombane, umngcipheko womlilo kunye neemeko zokusebenza eziqatha. Sisiqinisekiso esibalulekileyo sokungena kwimarike ephezulu eMntla Melika kunye nokuthatha inxaxheba ekubhideni iprojekthi.

II.Yeyiphi imigangatho esekwe kuyo isiqinisekiso se-UL seevalvu?

Iivalvu ngeenjongo ezahlukeneyo zisebenza kwimigangatho eyahlukeneyo:

- UL 429:Kwiivalvu ezisebenza ngombane (ezifana neevalvu ze-solenoid), jonga ukugquma kwazo ngombane, ukunyuka kobushushu, ubomi be-coil, njl.

- UL 842:Iivalvu zokulawula ubushushu ezenziwe ngesandla, ezisebenzisa uxinzelelo okanye ezisebenzisa ulwelo oluvuthayo nolunokutsha (ipetroli, idizili, ipetroli, njl.njl.).

- Iivalvu zomlilo: iivalvu zesango, iivalvu zebhabhathane, ivalvu yokujonganjl. kufuneka zithobele i-UL 262, i-UL 1091 kunye neminye imigangatho, kwaye uvavanyo luquka ukulinganisa uxinzelelo oluphezulu kunye nomlilo. Ukongeza, kukho imigangatho ekhethekileyo efana ne-UL 842B yeevalvu zedizili/i-biodiesel.

III.Yintoni eyona nto iphambili kuvavanyo lwesatifikethi se-UL?

Eyona nto iphambili kukuqinisekisa "ukhuseleko olubi kakhulu". Ukongeza ekuxhathiseni uxinzelelo kunye nokutywina, ingqwalasela ekhethekileyo kufuneka inikwe:

- Ukhuseleko lombane:ubushushu bekhoyili, iindlela zokusilela, ukulahleka kweemeko zamandla.

- Iimeko zokusebenza ezigqithisileyo:amandla okusebenza kunye nokusebenza kokuguga kwezinto ngaphakathi koluhlu lobushushu oluqala kwi -29°C ukuya kwi-52°C.

- Ikhuselekile:ilinganisa umngcipheko wokungasebenzi kakuhle okanye ukuguga kwezinto.