衬氟旋塞阀是用带通孔的塞体作启闭件，塞体随阀杆转动，以实现启闭动作的阀门。旋塞阀启闭迅速、流体阻力小。基本系列有衬里旋塞阀(全衬型)和衬套旋塞阀(半衬型)。旋塞阀多用于截断介质流动，也可进行介质分配(三通旋塞阀)。
衬氟旋塞阀适用在-50℃~150℃的各种浓度的王水、硫酸、盐酸、氢氟酸和各种有机酸、强酸、强氧化剂，FEP还适用于各种浓度的强碱有机溶剂以及其它腐蚀性气体、液体介质的管路上使用。
衬氟国标旋塞阀
| PN1.0MPa | ||||||||||
| DN | L | D | D1 | D2 | Z-фd | f | b | H | W | H0 |
| 15 | 110 | 95 | 65 | 45 | 4-14 | 2 | 14 | 85 | 180 | |
| 20 | 117 | 105 | 75 | 55 | 4-14 | 2 | 14 | 88 | 180 | |
| 25 | 127 | 115 | 85 | 65 | 4-14 | 2 | 14 | 98 | 260 | |
| 32 | 140 | 140 | 100 | 75 | 4-18 | 3 | 16 | 101 | 260 | |
| 40 | 165 | 150 | 110 | 85 | 4-18 | 3 | 16 | 128 | 320 | |
| 50 | 178 | 165 | 125 | 100 | 4-18 | 3 | 16 | 128 | 320 | |
| 65 | 190 | 185 | 145 | 120 | 4-18 | 3 | 18 | 135 | 320 | |
| 80 | 203 | 200 | 160 | 135 | 8-18 | 3 | 20 | 164 | 400 | 322 |
| 100 | 229 | 220 | 180 | 155 | 8-18 | 3 | 20 | 178 | 400 | 332 |
| 125 | 254 | 250 | 210 | 185 | 8-18 | 3 | 22 | 205 | 385 | |
| 150 | 267 | 285 | 240 | 210 | 8-23 | 3 | 24 | 220 | 405 | |
| 200 | 292 | 340 | 295 | 265 | 8-23 | 3 | 26 | 455 | ||
| 250 | 330 | 395 | 350 | 320 | 12-23 | 4 | 28 | 490 | ||
| PN1.6MPa | ||||||||||
| DN | L | D | D1 | D2 | Z-фd | f | b | H | W | H0 |
| 15 | 110 | 95 | 65 | 45 | 4-14 | 2 | 14 | 85 | 180 | |
| 20 | 117 | 105 | 75 | 55 | 4-14 | 2 | 14 | 88 | 180 | |
| 25 | 127 | 115 | 85 | 65 | 4-14 | 2 | 141 | 95 | 260 | |
| 32 | 140 | 140 | 100 | 75 | 4-18 | 3 | 6 | 101 | 260 | |
| 40 | 165 | 150 | 110 | 85 | 4-18 | 3 | 16 | 128 | 320 | |
| 50 | 178 | 165 | 125 | 100 | 4-18 | 3 | 16 | 128 | 320 | |
| 65 | 190 | 185 | 145 | 120 | 4-18 | 3 | 18 | 135 | 320 | |
| 80 | 203 | 200 | 160 | 135 | 8-18 | 3 | 20 | 164 | 400 | 322 |
| 100 | 229 | 220 | 180 | 155 | 8-18 | 3 | 20 | 178 | 400 | 332 |
| 125 | 254 | 250 | 210 | 185 | 8-18 | 3 | 22 | 205 | 385 | |
| 150 | 267 | 285 | 240 | 210 | 8-23 | 3 | 24 | 220 | 405 | |
| 200 | 292 | 340 | 295 | 265 | 12-23 | 3 | 26 | 455 | ||
| 250 | 330 | 405 | 355 | 320 | 12-26 | 4 | 28 | 490 | ||
衬氟美标旋塞阀
| Class150 | ||||||||||
| DN | L | D | D1 | D2 | Z-фd | f | b | H | W | H0 |
| 1/2" | 110 | 89 | 60.5 | 35 | 4-16 | 2 | 11 | 85 | 180 | |
| 3/4" | 117 | 98 | 70 | 43 | 4-16 | 2 | 13 | 88 | 180 | |
| 1" | 127 | 108 | 79.5 | 51 | 4-16 | 2 | 14 | 98 | 260 | |
| 11/4" | 140 | 117 | 89 | 64 | 4-16 | 2 | 15.7 | 101 | 260 | |
| 11/2" | 165 | 127 | 98.5 | 73 | 4-16 | 2 | 17.5 | 128 | 320 | |
| 2" | 178 | 152 | 120.5 | 92 | 4-19 | 2 | 19 | 128 | 320 | |
| 21/2" | 190 | 178 | 139.5 | 105 | 4-19 | 2 | 22 | 135 | 320 | |
| 3" | 203 | 190 | 152.5 | 127 | 4-19 | 2 | 24 | 167 | 400 | 322 |
| 4" | 229 | 229 | 190.5 | 157 | 8-19 | 2 | 24 | 178 | 400 | 332 |
| 5" | 254 | 254 | 216 | 186 | 8-22 | 3 | 24 | 205 | 385 | |
| 6" | 267 | 279 | 241.5 | 246 | 8-22 | 3 | 25.4 | 220 | 405 | |
| 8" | 292 | 343 | 298.5 | 270 | 8-22 | 3 | 28.5 | 455 | ||
| 10" | 330 | 406 | 362 | 324 | 12-25 | 3 | 30 | 490 | ||
| class300 | ||||||||||
| DN | L | D | D1 | D2 | Z-фd | f | b | H | W | H0 |
| 1/2" | 140 | 95 | 66.5 | 35 | 4-16 | 2 | 14 | 85 | 180 | |
| 3/4" | 152 | 117 | 82.5 | 43 | 4-19 | 2 | 15.7 | 88 | 180 | |
| 1" | 165 | 124 | 89 | 51 | 4-19 | 2 | 17.5 | 98 | 260 | |
| 11/4" | 178 | 133 | 98.5 | 64 | 4-19 | 2 | 19 | 101 | 260 | |
| 11/2" | 190 | 156 | 114.5 | 73 | 4-22 | 2 | 20.5 | 128 | 320 | |
| 2" | 216 | 165 | 127 | 92 | 8-22 | 2 | 22.4 | 128 | 320 | |
| 21/2" | 241 | 190 | 149 | 105 | 8-22 | 2 | 25.4 | 135 | 320 | |
| 3" | 283 | 210 | 168.5 | 127 | 8-22 | 2 | 28.4 | 167 | 400 | 322 |
| 4" | 305 | 254 | 200 | 157 | 8-22 | 2 | 32 | 178 | 400 | 332 |
| 5" | 381 | 279 | 235 | 186 | 8-22 | 3 | 35 | 205 | 385 | |
| 6" | 403 | 318 | 270 | 246 | 12-22 | 3 | 36.6 | 220 | 405 | |
| 8" | 419 | 381 | 330 | 270 | 12-25 | 3 | 41 | 455 | ||
| 10" | 457 | 445 | 387.5 | 324 | 16-29 | 3 | 47.8 | 490 | ||