Ivalvu yesango lemela yangena eTshayina ngeminyaka yoo-1980. Kwisithuba esingaphantsi kweminyaka engama-20, ububanzi bokusetyenziswa kwayo buye banda ukusuka kwiindawo eziqhelekileyo ukuya kuluhlu olubanzi lwemizi-mveliso, ukusuka ekulungisweni kwamalahle, ukukhutshwa kwe-gangue kunye nokukhutshwa kwe-slag kwizikhululo zamandla emigodi ukuya ekulungisweni kwamanzi amdaka asezidolophini, ukusuka kuphuhliso lwemibhobho yemizi-mveliso ngokubanzi ukuya kwiinkqubo zemibhobho zobungcali ezifana nokutya, impilo kunye namayeza.
Iindlela zokuqhuba zevalvu yesango lemela zezi:
Izixhobo zokuqhuba ngesandla, zombane, zomoya, zehydraulic, zebevel, ze-electro-hydraulic kunye neze-pneumatic kunye neze-hydraulic. Imilo yevalvu yesango lemela: isiqu esinyukayo kunye nesiqu esinganyukiyo. Izinto zevalvu yesango lemela: isinyithi esitshisiweyo, isinyithi esitshisiweyo, intsimbi yekhabhoni, intsimbi engatyiwayo, i-fluorine lining, njl. Ivalvu yesango lemela: itywina eliqinileyo, itywina elithambileyo, itywina elicala linye, itywina elicala linye kunye nezinye izinto.
Indlela echanekileyo yokufakela yindlela yokusebenza kakuhle komatshini. Ivalvu yesango lemela isebenzisa ubunjineli bokuqinisa njengesixhobo esiphambili sokukhuhla kunye nokukhuhla okuchasene nokuqhobosha. Kwangaxeshanye, yenzelwe uhlobo lwesakhiwo sokukhuhla okuchasene nokuqhobosha. Inomsebenzi ophindwe kabini wokukhuhla okanye ukuqhobosha + ukuqhobosha, kwaye ubomi bayo benkonzo bungafikelela izihlandlo ezili-10 kunevalvu yesango lemela yesinyithi eqhelekileyo.
Ngenxa yeenzuzo zomthamo omncinci, ukumelana nokuhamba kwamanzi okuncinci, ubunzima obulula, ukufakelwa okulula kunye nokuqhaqha, ivalvu yesango lemela ebhityileyo isombulula iingxaki ezinzima zokuxhathisa ukuhamba kwamanzi okukhulu, ubunzima obunzima, ukufakelwa okunzima kunye nendawo enkulu yomgangatho wevalvu yesango eqhelekileyo, ivalvu yesango elithe tyaba, ivalvu yebhola, ivalvu yokumisa, ivalvu yokulawula kunye nevalvu yebhabhathane. Emva kokuvela kwevalvu yesango lemela, inani elikhulu leevalvu ezinqunyiweyo kunye neevalvu zokulawula ziye zatshintshwa. Namhlanje, inani elikhulu levalvu yesango lemela lisetyenziswa eMelika naseJapan.

INortech ngomnye wabavelisi beevalvu zoshishino abaphambili eTshayina abanesiqinisekiso somgangatho se-ISO9001.

Iimveliso eziphambili:Ivalvu yebhabhathane,Ivalvu yeBhola,Ivalvu yeSango,Jonga iValve,IGlobe Vavlve,Ii-Y-Strainers,Isixhobo sombane,Ii-Acurators ze-Pneumatic.

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