1. Ivalve yesango: Ivalve yesango ibhekisa kwivalve enendawo yokuvala (isango) ehamba ecaleni kwecala elithe nkqo le-axis yetshaneli.Isetyenziswa ikakhulu njengendlela yokusika kwipayipi, oko kukuthi, ivule ngokupheleleyo okanye ivalwe ngokupheleleyo.Ngokuqhelekileyo, iivalve zesango akufanele zisetyenziswe ukulawula ukuhamba.Ingasetyenziselwa uxinzelelo lobushushu obuphantsi okanye ubushushu obuphezulu kunye noxinzelelo, kuxhomekeke kwisixhobo sevalve.Kodwa iivalvu zesango azisetyenziswa ngokubanzi ukuhambisa udaka kunye nezinye izinto ezisasazwa kumbhobho.
Izinto eziluncedo:
(1) ukuxhathisa ulwelo oluncinane;
② Itorque efunekayo ukuqalisa nokuvala incinci;
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(4) xa ivuleke ngokupheleleyo, umphezulu wokutywina ukhukuliswa sisixhobo esisebenzayo sincinci kunevalve yokumisa;
Ubume bemilo bulula, iteknoloji efanelekileyo yokuvelisa;
Ubude besakhiwo bufutshane.
Izinto ezingeloncedo:
(1) Ubungakanani kunye nobude bokuvula bukhulu, indawo yofakelo efunekayo nayo inkulu;
(2) kwinkqubo yokuvula kunye nokuvala, ukutywinwa komphezulu ohambelanayo, ilahleko ye-friction inkulu, kwaye kulula ukubangela isenzeko se-abrasion kwiqondo lokushisa eliphezulu;
(3) Ivalve yesango ngokubanzi inemigangatho emibini yokutywina, ukusetyenzwa, ukugaya kunye nokugcinwa kwandise ubunzima obuthile;
④ Ixesha elide lokuvula kunye nokuvala.

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