此类型专用低温升压调节阀主要用于低温储槽、槽车和罐车的升压系统，广泛用于LNG、液态乙烯及其它低温介质，具有密封可靠、动作灵敏、压力稳定可靠和防静电的特点。
This type is special low-temperature step-down regulator is mainly used for low temperature storage tank, tank car and tank car step-down system, widely used in LNG, ethylene and other low temperature liquid medium, with reliable sealing, action quick, the characteristics of the pressure is stable and reliable, and anti-static.
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：螺纹
| 主要零部件名称 Main components name | 材料 Materials |
| 阀体/Valve body | ZG0Cr18Ni9 |
| 阀瓣/Valve disc | HPb59-1 |
| 主密封件/Main seal | PTFE |
| 型号 Model | 主要外形和连接尺寸 Main form and the connection size (mm) | 公称压力 Nominal pressure | 调压范围 Scope of pressure adjustment | ||||
| H | H1 | W1 | W2 | M | （MPa） | （MPa） | |
| DYS-20 | 239 | 192 | 100 | Ф133 | 2-Rc¾ | PN-4.0 | 0.2~0.8 |
| DYS-20A | 255 | 203 | 100 | Ф133 | 2-Rc¾ | PN-4.0 | 0.4~1.6 |
