软密封球阀Q41F的优点：
1. 流体阻力小，全开时球体通道、阀体通道和连接管道的截面积相等，并且成直线相通，介质流过球阀，相当于流过一段直通的管子，在各类阀门中球阀的流体阻力zui小。
2.启闭迅速，启闭时只需把球体转动90°，方便而迅速。
3.结构较简单，体积较小，重量较轻。特别是它的高度远小于闸阀和截止阀。
4.密封性能较好。球阀一般采用具有弹性的软质密封圈。
软密封球阀Q41F的缺点：
使用温度范围较小。球阀一般采用软密封圈，使用温度受密封圈材料的限制。密封圈材料的开发及金属硬密封球阀的应用能扩大球阀的使用温度范围。
软密封球阀Q41F的结构型式：
按结构的密封机理，球阀分为浮动球球阀和固定球球阀。前者主要靠介质压力将球体压紧在出口端阀座上，其使用压力和通径受到一定的限制。而后者的球体由安装在阀体上的上下两个轴承支持，球体的位置固定，密封作用是靠弹簧和介质压力使阀座压向球体而实现的。因而启闭力矩较小，适用于高压和大口径场合。
| 公称压力(PN) | 1.6 | 2.5 | 4.0 | 6.4 |
| 壳体试验压力 | 2.4 | 3.8 | 6.0 | 9.6 |
| 密封试验(液) | 1.8 | 2.8 | 4.4 | 7.0 |
| 密封试验(气) | 0.5～0.7 |
| 适用介质 | C P R
水、油品、蒸气 硝酸类 醋酸类 |
| 适用温度 | ≤200℃ |
主要零件材料
| 名称 | WCB类 | CF8类 | CF3类 | CF8M类 | CF3M类 |
| 阀体左体 | A216-WCB | A315-CF8 | A35-CF3 | A351-CF8M | A351-CF3M |
| 球体 | B2-B8 | A105-1025 | A182-F304L | A182-F304L | A132-F316 | A182-F316L |
| B8以上 | A216-WCB | A351-CF8M | A351-CF3 | A351-CF8M | A351-CF3M |
| 阀杆 | A182-F6a | A182-F304 | A182-F304L | A182-F336 | A182-F316L |
| 阀座 | PTFE/增强PTFE/NYLIN PTFE/Reinforced PTFE/Nyion |
| 阀座支承圈 | A105-1025 | A182-F304 | A182-F304L | A182-F316 | A182-F316L |
| 弹簧 | | 3yc-7/17-49H |
| O形圈 | NBR | 氟橡胶 |
| 螺柱 | A193-B7 | A193-B8 |
| 螺母 | A194-2H | A194-8 |
| 公称通径NPS | 单位 | L | D | T | G | C | n-φd | W | H | | in | mm | | 1/2" | 15 | mm | 108 | 89 | 12 | 35 | 60.5 | 4-15 | 115 | 72 | | in | 4.25 | 3.5 | 0.47 | 1.38 | 2.38 | 4-0.59 | 4.53 | 28.3 | | 3/4" | 20 | mm | 117 | 98 | 12 | 43 | 70 | 4-15 | 115 | 76 | | in | 4.61 | 3.86 | 0.47 | 1.69 | 2.76 | 4-0.59 | 4.53 | 29.9 | | 1" | 25 | mm | 127 | 108 | 12 | 51 | 79.5 | 4-15 | 150 | 92 | | in | 5 | 4.25 | 0.47 | 2 | 3.13 | 4-0.59 | 5.9 | 3.62 | | 11/2" | 40 | mm | 165 | 127 | 14.3 | 73 | 98.5 | 4-16 | 200 | 123 | | in | 6.5 | 5 | 0.56 | 2.88 | 3.88 | 4-0.62 | 7.87 | 4.84 | | 2" | 50 | mm | 178 | 152 | 15.9 | 92 | 120.5 | 4-19 | 200 | 132 | | in | 7 | 6.00 | 0.625 | 3.62 | 4.75 | 4-0.75 | 7.87 | 5.20 | | 21/2" | 65 | mm | 190 | 178 | 17.5 | 105 | 139.5 | 4-19 | 320 | 164 | | in | 7.5 | 7 | 0.69 | 4.12 | 5.5. | 4-0.75 | 12.6 | 6.45 | | 3" | 80 | mm | 203 | 190 | 19.1 | 127 | 152.4 | 4-19 | 320 | 173 | | in | 8 | 7.50 | 0.75 | 5 | 6 | 4-0.75 | 12.6 | 6.8 | | 4" | 100 | mm | 229 | 229 | 23.9 | 157 | 190.5 | 8-19 | 450 | 210 | | in | 9 | 9 | 0.94 | 6.19 | 7.5 | 8-0.75 | 17.72 | 8.26 | | 6" | 150 | mm | 394 | 279 | 26 | 216 | 241.5 | 8-22 | 8000 | 288 | | in | 15.5 | 10.98 | 1.02 | 8.5 | 9.50 | 8-0.88 | 31.5 | 1.34 | | 8" | 200 | mm | 457 | 343 | 29 | 270 | 298.5 | 8-22 | 1120 | 374 | | in | 18.00 | 13.50 | 1.12 | 10.62 | 11.75 | 8-0.88 | 44.10 | 14.72 | | 10" | 250 | mm | 533 | 406 | 31 | 324 | 362 | 12-25 | 1420 | 366 | | in | 20.98 | 16 | 1.2 | 12.75 | 14.75 | 12-1 | 55.12 | 14.40 | | 12" | 300 | mm | 610 | 483 | 32 | 381 | 432 | 12-25 | 1420 | 412 | | in | 24 | 19 | 1.26 | 15 | 17 | 12-1 | 55.12 | 16.22 |
| 公称通径NPS | 单位 | L | D | T | G | C | n-φd | W | H | | in | mm | | 1/2" | 15 | mm | 140 | 95 | 15 | 35 | 66.5 | 4-15 | 115 | 72 | | in | 5.51 | 3.74 | 0.59 | 1.38 | 2.62 | 4-0.59 | 4.53 | 28.3 | | 3/4" | 20 | mm | 152 | 117 | 16 | 43 | 82.5 | 4-19 | 115 | 76 | | in | 5.98 | 4.61 | 0.62 | 1.69 | 3.25 | 4-0.75 | 4.53 | 29.9 | | 1" | 25 | mm | 165 | 124 | 18 | 51 | 89 | 4-19 | 150 | 92 | | in | 6.5 | 4.9 | 0.71 | 2 | 3.5 | 4-0.75 | 5.9 | 3.62 | | 11/2" | 40 | mm | 190 | 156 | 20.7 | 73 | 114.5 | 4-22 | 200 | 123 | | in | 7.5 | 6.12 | 0.81 | 2.88 | 4.51 | 4-0.88 | 7.87 | 4.84 | | 2" | 50 | mm | 216 | 165 | 22.3 | 92 | 127 | 8-19 | 200 | 132 | | in | 8.5 | 6.5 | 0.88 | 3.62 | 5 | 8-0.75 | 7.87 | 5.20 | | 21/2" | 65 | mm | 241 | 190 | 25.4 | 105 | 149 | 8-22 | 320 | 164 | | in | 9.5 | 7.5 | 1 | 4.12 | 5.87 | 8-0.88 | 12.6 | 6.45 | | 3" | 80 | mm | 283 | 210 | 28.5 | 127 | 168.5 | 8-22 | 320 | 173 | | in | 11.25 | 8.25 | 1012 | 5 | 6.62 | 8-0.88 | 12.6 | 6.8 | | 4" | 100 | mm | 305 | 254 | 31.8 | 157 | 200 | 8-22 | 450 | 210 | | in | 12 | 10 | 1.25 | 6.19 | 7.88 | 8-0.88 | 17.72 | 8.26 | | 6" | 150 | mm | 403 | 318 | 36.6 | 216 | 270 | 12-22 | 1120 | 336 | | in | 15.875 | 12.5 | 1.44 | 8.5 | 10.62 | 12-0.88 | 44.10 | 13.23 | | 8" | 200 | mm | 502 | 381 | 42 | 270 | 330 | 12-25 | 1420 | 385 | | in | 19.76 | 15 | 16.5 | 10.62 | 12.99 | 12-1 | 55.12 | 15.16 | | 10" | 250 | mm | 568 | 444 | 48 | 324 | 387.5 | 16-29 | 1420 | 370 | | in | 22.36 | 17.50 | 1.89 | 12.75 | 15.25 | 16-1.12 | 55.12 | 14.56 |
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