球阀壳体的最小壁厚: (WCB) 公称通径 DN 公 称 压 力(Mpa) 0.6 1.0 1.6 2.0 2.5 4.0 5.0 6.4 10.0 50 6.5 7.0 7.5 8.0 8.0 8.0 8.0 65 7.0 7.0 7.5 8.0 8.0 9.0 9.0 80 7.0 7.0 7.5 8.0 9.0 10.0 10.0 100 7.5 8.0 8.0 9.0 10.0 11.0 12.0 150 9.0 9.0 9.0 11.0 12.0 14.0 16.0 200 10.0 11.0 13.0 13.0 13.0 17.0 20.0 250 11.0 11.0 12.0 14.0 15.0 21.0 23.0 300 12.0 12.0 13.0 16.0 17.0 23.0 27.0 350 12.5 13.0 14.0 17.5 20.0 26