对夹式止回阀 铁制对夹旋启式止回阀及铁制对夹蝶式止回阀阀体的最小壁厚
公称尺寸 DN | 公称压力 PN | |||||
2.5 | 6 | 10 | 16 | 25 | 40 | |
阀体的最小壁厚/mm | ||||||
灰铸铁、球墨铸铁 | 球墨铸铁 | |||||
50 | 6 | 8 | 8 | 8 | 8 | 9 |
65 | 6 | 8 | 8 | 9 | 9 | 10 |
80 | 6 | 9 | 9 | 10 | 10 | 11 |
100 | 8 | 9 | 9 | 11 | 11 | 12 |
125 | 9 | 10 | 10 | 12 | 12 | 13 |
150 | 9 | 10 | 10 | 14 | 14 | 15 |
200 | 10 | 12 | 12 | 15 | 15 | 16 |
250 | 12 | 13 | 13 | — | — | — |
300 | 13 | 14 | 14 | — | — | — |
350 | 14 | 15 | 15 | — | — | — |
400 | 14 | 16 | 16 | — | — | — |
450 | 15 | 17 | 17 | — | — | — |
500 | 15 | 18 | 18 | — | — | — |
600 | 16 | 20 | 20 | — | — | — |
700 | 20 | 24 | 26 | — | — | — |
800 | 20 | 24 | 26 | — | — | — |
900 | 22 | 25 | 28 | — | — | — |
1000 | 22 | 26 | 30 | — | — | — |
1200 | 23 | 26 | — | — | — | — |
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