When fully open and fully closed, the sealing surface of the ball and the valve seat is isolated from the medium, so the medium passing through the valve at high speed will not cause erosion of the sealing surface.
Markuu si buuxda u furmo una xirnaado, wareega iyo kursiga waalka Qalabka dusha sare ee waalka wuxuu ka go'doonsan yahay dhexdhexaadka, sidaas darteed dhexdhexaadka ka gudbaya waalka xawaaraha sare ma sababi doono nabaad-guurka dusha sare ee shaabadda ...