ANSI/FCI 70-2 specifies leakage classes and test procedures for control valves. Among them, level VI is the lowest leakage level. The high-performance wafer butterfly valve can achieve the non-bubble seal specified by MSS-SP61, which is higher than the VI level.
| 阀门规格 | 近似尺寸Approximatesize（毫米mm) | ||||||||||||
| size | |||||||||||||
| NPS | DN | H1 | H2 | H3 | L | D | D1 | E | P | M | C | ||
| 10K | PN16 | 150LB | |||||||||||
| 2" | 50 | 65 | 138 | 16 | 43 | 96 | 48 | 40 | 11 | F07 | 120 | 125 | 120.5 |
| 2.5" | 65 | 75 | 148 | 16 | 46 | 119 | 64 | 60 | 11 | F07 | 140 | 145 | 139.5 |
| 3" | 80 | 82 | 168 | 18 | 46 | 132 | 82 | 76 | 11 | F07 | 150 | 160 | 152.5 |
| 4" | 100 | 92 | 180 | 18 | 52 | 156 | 102 | 95 | 11 | F07 | 175 | 180 | 190.5 |
| 5" | 125 | 115 | 202 | 21 | 56 | 186 | 122 | 115 | 14 | F07 | 210 | 210 | 216 |
| 6" | 150 | 126 | 225 | 21 | 56 | 216 | 148 | 142 | 14 | F10 | 240 | 240 | 241.5 |
| 8" | 200 | 165 | 265 | 25 | 64 | 268 | 197 | 189 | 17 | F10 | 290 | 295 | 298.5 |
| 10" | 250 | 235 | 315 | 28 | 71 | 324 | 243 | 238 | 22 | F12 | 355 | 355 | 362 |
| 12" | 300 | 258 | 342 | 32 | 78 | 381 | 295 | 282 | 27 | F12 | 432 | 410 | 400 |
| 14" | 350 | 295 | 375 | 38 | 92 | 413 | 325 | 318 | 27 | F14 | 455 | 470 | 476 |
| 16" | 400 | 315 | 410 | 60 | 102 | 470 | 372 | 365 | 36 | F17 | 510 | 525 | 540 |
| 18" | 450 | 370 | 442 | 60 | 114 | 533 | 421 | 415 | 36 | F16 | 565 | 585 | 578 |
| 20" | 500 | 398 | 458 | 70 | 127 | 580 | 470 | 458 | 42 | F16 | 620 | 650 | 635 |
| 24" | 600 | 475 | 558 | 80 | 154 | 688 | 569 | 550 | 46 | F16 | 730 | 770 | 749.5 |
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