概述：
美標(biāo)法蘭球閥具有旋轉(zhuǎn)90度的動(dòng)作，旋塞體為球體，有圓形通孔或通道通過(guò)其軸線。球閥在管路中主要用來(lái)做切斷、分配和改變介質(zhì)的流動(dòng)方向，它只需要用旋轉(zhuǎn)90度的操作和很小的轉(zhuǎn)動(dòng)力矩就能關(guān)閉嚴(yán)密。球閥最適宜做開(kāi)關(guān)、切斷閥使用，但近來(lái)的發(fā)展已將球閥設(shè)計(jì)成使它具有節(jié)流和控制流量之用。
主要外形尺寸及連接尺寸：
| 美標(biāo)(ANSI)150LB | ||||||||
| in | DN | L | D | D1 | D2 | b | t | z-фd |
| 1/2" | 15 | 108 | 90 | 60.3 | 34.9 | 11.5 | 1.6 | 4-ф16 |
| 3/4" | 20 | 117 | 100 | 69.9 | 42.9 | 13 | 1.6 | 4-ф16 |
| 1" | 25 | 127 | 110 | 79.4 | 50.8 | 14.5 | 1.6 | 4-ф16 |
| 1 1/4" | 32 | 140 | 115 | 88.9 | 63.5 | 16 | 1.6 | 4-ф16 |
| 1 1/2" | 40 | 165 | 125 | 98.4 | 73 | 17.5 | 1.6 | 4-ф16 |
| 2" | 50 | 178 | 150 | 120.7 | 92.1 | 19.5 | 1.6 | 4-ф19 |
| 2 1/2" | 65 | 190 | 180 | 139.7 | 104.8 | 22.5 | 1.6 | 4-ф19 |
| 3" | 80 | 203 | 190 | 152.4 | 127 | 24 | 1.6 | 4-ф19 |
| 4" | 100 | 229 | 230 | 190.5 | 157.2 | 24 | 1.6 | 8-ф19 |
| 5" | 125 | 356 | 255 | 215.9 | 185.7 | 24 | 1.6 | 8-ф22 |
| 6" | 150 | 394 | 280 | 241.3 | 215.9 | 25.5 | 1.6 | 8-ф22 |
| 8" | 200 | 457 | 345 | 298.5 | 269.9 | 29 | 1.6 | 8-ф22 |
| 10" | 250 | 533 | 405 | 362 | 323.8 | 30.5 | 1.6 | 12-ф25 |
| 12" | 300 | 610 | 485 | 431.8 | 381 | 32 | 1.6 | 12-ф25 |
| 14" | 350 | 686 | 535 | 476.3 | 412.8 | 35 | 1.6 | 12-ф29 |
| 16" | 400 | 762 | 595 | 539.8 | 469.9 | 37 | 1.6 | 16-ф29 |
| 美標(biāo)(ANSI)300LB | ||||||||
| in | DN | L | D | D1 | D2 | b | t | z-фd |
| 1/2" | 15 | 140 | 95 | 66.7 | 34.9 | 14.5 | 1.6 | 4-ф16 |
| 3/4" | 20 | 152 | 115 | 82.6 | 42.9 | 16 | 1.6 | 4-ф19 |
| 1" | 25 | 165 | 125 | 88.9 | 50.8 | 17.5 | 1.6 | 4-ф19 |
| 1 1/4" | 32 | 178 | 135 | 98.4 | 63.5 | 19.5 | 1.6 | 4-ф19 |
| 1 1/2" | 40 | 190 | 155 | 114.3 | 73 | 21 | 1.6 | 4-ф22 |
| 2" | 50 | 216 | 165 | 127 | 92.1 | 22.5 | 1.6 | 8-ф19 |
| 2 1/2" | 65 | 241 | 190 | 149.2 | 104.8 | 25.5 | 1.6 | 8-ф22 |
| 3" | 80 | 282 | 210 | 168.3 | 127 | 29 | 1.6 | 8-ф22 |
| 4" | 100 | 305 | 255 | 200 | 157.2 | 32 | 1.6 | 8-ф22 |
| 5" | 125 | 381 | 280 | 235 | 185.7 | 35 | 1.6 | 8-ф22 |
| 6" | 150 | 403 | 320 | 269.9 | 215.9 | 37 | 1.6 | 12-ф22 |
| 8" | 200 | 502 | 380 | 330.2 | 269.9 | 41.5 | 1.6 | 12-ф25 |
| 10" | 250 | 568 | 445 | 387.4 | 323.8 | 48 | 1.6 | 16-ф29 |
| 12" | 300 | 648 | 520 | 450.8 | 381 | 51 | 1.6 | 16-ф32 |
| 14" | 350 | 762 | 585 | 514.4 | 412.8 | 54 | 1.6 | 20-ф32 |
| 16" | 400 | 838 | 650 | 571.5 | 469.9 | 57.5 | 1.6 | 20-ф35 |
| 美標(biāo)(ANSI)600LB | ||||||||
| in | DN | L | D | D1 | D2 | b | t | z-фd |
| 1/2" | 15 | 165 | 95 | 66.7 | 34.9 | 21 | 6.4 | 4-ф16 |
| 3/4" | 20 | 190 | 115 | 82.6 | 42.9 | 23 | 6.4 | 4-ф19 |
| 1" | 25 | 216 | 125 | 88.9 | 50.8 | 24 | 6.4 | 4-ф19 |
| 1 1/4" | 32 | 229 | 135 | 98.4 | 63.5 | 27.5 | 6.4 | 4-ф19 |
| 1 1/2" | 40 | 241 | 155 | 114.3 | 73 | 29 | 6.4 | 4-ф22 |
| 2" | 50 | 292 | 165 | 127 | 92.1 | 32 | 6.4 | 8-ф19 |
| 2 1/2" | 65 | 330 | 190 | 149.2 | 104.8 | 35 | 6.4 | 8-ф22 |
| 3" | 80 | 356 | 210 | 168.3 | 127 | 38.5 | 6.4 | 8-ф22 |
| 4" | 100 | 432 | 275 | 215.9 | 157.2 | 45 | 6.4 | 8-ф25 |
| 5" | 125 | 508 | 330 | 266.7 | 185.7 | 51.5 | 6.4 | 8-ф29 |
| 6" | 150 | 559 | 355 | 292.1 | 215.9 | 54.5 | 6.4 | 12-ф29 |
| 8" | 200 | 660 | 420 | 349.2 | 269.9 | 62 | 6.4 | 12-ф32 |
| 10" | 250 | 787 | 510 | 431.8 | 323.8 | 70 | 6.4 | 16-ф35 |
| 12" | 300 | 838 | 560 | 489 | 381 | 73.5 | 6.4 | 20-ф35 |
| 14" | 350 | 889 | 605 | 527 | 412.8 | 76.5 | 6.4 | 20-ф39 |
