美標(biāo)截止閥主要有API和ASME標(biāo)準(zhǔn)，ASTM，ASTM是材料標(biāo)準(zhǔn)，不是閥門本身的標(biāo)準(zhǔn)；按美國標(biāo)準(zhǔn)設(shè)計，制造，生產(chǎn)、檢測的截止閥叫做美標(biāo)截止閥。
主要外形尺寸及連接尺寸：
| DN | 150Lb 凸面法蘭（RF) 主要尺寸Dimensions（mm） | ||||||||
| mm | in | L | D | D1 | D2 | b | n-φd | H | D0 |
| 15 | 1/2 | 108 | 89 | 60.5 | 35 | 11.2 | 4-16 | 241 | 100 |
| 20 | 3/4 | 117 | 98 | 69.9 | 43 | 12.7 | 4-16 | 241 | 100 |
| 25 | 1 | 127 | 108 | 79.2 | 51 | 14.2 | 4-16 | 242 | 125 |
| 32 | 11/4 | 140 | 117 | 89 | 63 | 16 | 4-16 | 280 | 160 |
| 40 | 11/2 | 165 | 127 | 98.6 | 73 | 17.5 | 4-16 | 286 | 160 |
| 50 | 2 | 203 | 152 | 120.7 | 92 | 19 | 4-19 | 368 | 200 |
| 65 | 21/2 | 216 | 178 | 139.7 | 105 | 22.4 | 4-19 | 387 | 200 |
| 80 | 3 | 241 | 190 | 152.4 | 127 | 24 | 4-19 | 411 | 250 |
| 100 | 4 | 292 | 229 | 190.5 | 157 | 24 | 4-19 | 454 | 250 |
| 125 | 5 | 356 | 254 | 216.0 | 186 | 24 | 8-22.5 | 455 | 350 |
| 150 | 6 | 406 | 279 | 241.3 | 216 | 25.4 | 8-22.5 | 541 | 350 |
| 200 | 8 | 495 | 343 | 298.5 | 270 | 28.4 | 8-22.5 | 651 | 450 |
| 250 | 10 | 622 | 406 | 362.0 | 324 | 30.2 | 12-25.4 | 800 | 450 |
| 300 | 12 | 698 | 483 | 431.8 | 381 | 32 | 12-25.4 | 1231 | 600 |
| 350 | 14 | 787 | 533 | 476.3 | 413 | 35 | 12-29 | 1450 | 600 |
| 400 | 16 | 914 | 597 | 539.8 | 470 | 36.6 | 26-29 | 1645 | 600 |
