The structure of the stop valve is simpler than that of the gate valve, and it is more convenient to manufacture and maintain; its sealing surface is not easy to wear and scratch, and has good sealing performance. There is no relative sliding between the valve disc and the sealing surface of the valve body when opening and closing, so there is no wear and scratch Severe, good sealing performance, long service life; when opening and closing, the stroke of the disc is small, so the height of the stop valve is smaller than that of the gate valve, but the structural length is longer than that of the gate valve. The ball valve is wear-resistant, due to the characteristics of the spool and sealing ring of the hard-sealed ball valve, it will not cause too much wear when switching; the sealing performance is good, because the seal of the hard-sealed ball valve is manually ground until the spool and the sealing ring are completely Matching can be used. So his sealing performance is reliable.
