公称 尺寸 DN |
公称压力 PN |
|||||
16、20 |
25~50 |
63~100 |
150、160 |
250、260 |
420 |
|
阀体密封座的最小直径/mm |
||||||
25 |
25 |
25 |
25 |
22 |
22 |
19 |
32 |
31 |
31 |
31 |
28 |
28 |
25 |
40 |
38 |
38 |
38 |
34 |
34 |
28 |
50 |
50 |
50 |
50 |
47 |
47 |
38 |
65 |
63 |
63 |
63 |
57 |
57 |
47 |
80 |
76 |
76 |
76 |
72 |
69 |
57 |
100 |
100 |
100 |
100 |
98 |
92 |
72 |
150 |
150 |
150 |
150 |
146 |
136 |
111 |
200 |
200 |
200 |
199 |
190 |
177 |
146 |
250 |
250 |
250 |
247 |
238 |
222 |
184 |
300 |
300 |
300 |
298 |
282 |
263 |
218 |
350 |
336 |
336 |
326 |
311 |
288 |
241 |
400 |
387 |
387 |
374 |
355 |
330 |
276 |
450 |
438 |
431 |
419 |
400 |
371 |
311 |
500 |
488 |
482 |
463 |
444 |
415 |
342 |
600 |
590 |
584 |
558 |
533 |
498 |
412 |
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