Ivalvu yokulawula, ekwabizwa ngokuba yivalvu yokulawula, isetyenziselwa ukulawula ubungakanani bolwelo. Xa inxalenye elawulayo yevalvu ifumana isignali yokulawula, isiqu sevalvu siya kulawula ngokuzenzekelayo ukuvulwa nokuvalwa kwevalvu ngokwesignali, ngaloo ndlela silawula izinga lokuhamba kolwelo kunye noxinzelelo; idla ngokusetyenziselwa ukufudumeza, igesi, i-petrochemical kunye neminye imibhobho.
Ivalvu yokumisa, ekwaziwa ngokuba yivalvu yokumisa, ingayivala ngokupheleleyo indawo yokuphuma yesihlalo sevalvu ngokufaka uxinzelelo ngokujikeleza isiqu sevalvu, ngaloo ndlela ithintele ukuhamba kolwelo; iivalvu zokumisa zisetyenziswa kakhulu kwigesi yendalo, igesi enyibilikisiweyo, i-sulfuric acid kunye neminye imibhobho yegesi erhabaxa kunye neyolwelo.
Ivalvu yesangoifana nesango. Ngokujikelezisa isiqu sevalvu, ipleyiti yesango ilawulwa ukuba ihambe ngokuthe nkqo phezulu nasezantsi ukulawula ulwelo. Iiringi zokuvala kumacala omabini epleyiti yesango zinokuvala ngokupheleleyo lonke icandelo. Ivalvu yesango inokuvulwa ngokupheleleyo kwaye ivalwe ngokupheleleyo, kwaye ayinakusetyenziswa ukulawula ukuhamba kwamanzi. Iivalvu zesango zisetyenziswa kakhulu njengezixhobo zokuthintela amanzi empompo, amanzi amdaka, iinqanawa kunye neminye imibhobho.
Ivalvu yokujonga iswingIxhomekeke kuxinzelelo lolwelo ukuvula isigqubuthelo sevalvu. Xa uxinzelelo lolwelo olukwimibhobho yokungena kunye neyokuphuma kwevalvu lulinganisiwe, isigqubuthelo sevalvu sinokuvala ngomxhuzulane waso ukuthintela ulwelo ukuba lungadluli. Umsebenzi waso ophambili kukuthintela ulwelo ukuba lungabuyeli umva. Ukuhamba, kukwicandelo levalvu ezenzekelayo; isetyenziswa kakhulu kwipetroleum, iikhemikhali, amayeza kunye neminye imibhobho.
Ixesha lokuthumela: Agasti-31-2023