密封性
採用上述技術方案,利用液體介質本身的壓力來達到密封的目的,壓力愈大,產生的密封力也愈大,密封也愈可靠,使其成為高壓自緊式的密封截止閥;在高壓下的溫度與壓力有波動時,密封性能良好,密封可靠,與強制密封相比,不需要很大的螺栓預緊力,中法蘭尺寸小,重量輕,結構緊湊。
外形尺寸
| ANSI 900Lb | | | | | | |
| NPS | 1/2 | 3/4 | 1 | 11/4 | 11/2 | 2 |
| L | 216 | 229 | 254 | | 305 | 368 |
| L1 | 140 | 140 | 140 | | 178 | 216 |
| H | 335 | 335 | 335 | | 400 | 525 |
| D0 | 180 | 180 | 180 | | 200 | 300 |
| Wt | 18.2 | 22.4 | 25.3 | | 60 | 84.4 |
| Wt1 | 12.6 | 12.4 | 12.2 | | 28.7 | 53.7 |
| ANSI 1500Lb | | | | | | |
| NPS | 1/2 | 3/4 | 1 | 11/4 | 11/2 | 2 |
| L | 216 | 229 | 254 | | 305 | 368 |
| L1 | 140 | 140 | 140 | | 178 | 216 |
| H | 335 | 335 | 335 | | 400 | 525 |
| D0 | 180 | 180 | 180 | | 200 | 300 |
| Wt | 17 | 23.5 | 24.1 | | 51.3 | 74.2 |
| Wt1 | 12.6 | 12.4 | 12.2 | | 28.7 | 53.7 |
| ANSI 2500Lb | | | | | | |
| NPS | 1/2 | 3/4 | 1 | 11/4 | 11/2 | 2 |
| L | | | | | | |
| L1 | 186 | 186 | 186 | | 232 | 279 |
| H | 335 | 335 | 335 | | 400 | 525 |
| D0 | 180 | 180 | 180 | | 200 | 300 |
| Wt | | | | | | |
| Wt1 | 12.6 | 12.4 | 12.2 | | 28.7 | 53.7 |