此类型专用真空夹套低温紧急切断阀主要用于低温储运上切断介质流通，特别是在出现火情故障时能及时切断介质。具有开关灵活、密封可靠和防静电的特点。
This type is special vacuum jacketed low-temperature emergency cut-off valve is mainly used for cut off the medium flow on low temperature storage and transportation, especially in the event of a fire failure can cut off the medium in a timely manner. With flexible switch, reliable sealing and anti-static characteristics.
主要技术参数 Main technical parameters
公称压力/Nominal pressure：4.0MPa
设计温度/Design temperature：-196℃～+80℃
适用介质/Applicable medium：LNG 、LO2、LN2、LAr
连接方式/Connection method：承插焊
| 主要零部件名称 Main components name |
| 阀体/Valve body：ZG0Cr18Ni9 |
| 阀瓣/Valve disc：0Cr18Ni9 |
| 阀盖/Valve cover：ZG0Cr18Ni9 |
| 阀杆/Valve stem：0Cr18Ni9 |
| 主密封件/Main sea：PTFEI |
| 型号/Model | 主要外形和连接尺寸/Main form and the connection size (mm) | ||||||||||
| H | H1 | H2 | D0 | D1 | D2 | D | M | W1 | W2 | B | |
| DZQ -25 | 194 | 492 | 131.5 | Ф25 | Ф32.5 | Ф82 | Ф100 | Rc¼ | 90 | Ф130 | 8 |
| DZQ -32 | 203 | 501 | 141.5 | Ф32 | Ф38.5 | Ф101 | Ф100 | Rc¼ | 105 | Ф130 | 8 |
| DZQ -40 | 230 | 578 | 173 | Ф40 | Ф45.5 | Ф101 | Ф125 | Rc¼ | 120 | Ф160 | 8 |
| DZQ -50 | 236 | 584 | 176.5 | Ф50 | Ф57.5 | Ф126 | Ф125 | Rc¼ | 140 | Ф160 | 10 |
