DH-A系列低溫止回閥
DH-A系列低溫止回閥 DH - A series of check valve in low temperature
此類型專用低溫止回閥適用于低溫貯槽、槽車和罐車防止介質倒流，廣泛用于LNG、液態乙烯及其它低溫介質，具有密封可靠的特點。
This type is special low temperature check valve is suitable for low temperature storage tank, tank car and tank car to prevent the reverse medium, is widely used in LNG, ethylene and other low temperature liquid medium, has the characteristics of the sealing is reliable.
主要技術參數 Main technical parameters
公稱壓力/Nominal pressure:4.0MPa
設計溫度/Design temperature:-196℃～+80℃
適用介質/Applicable medium:LNG 、LO2、LN2、LAr
連接方式/Connection method:對焊
| 主要零部件名稱 Main components name | 材料 Materials |
| 閥體/Valve body | ZG0Cr18Ni9 |
| 閥瓣/Valve disc | 0Cr18Ni9Ti |
| 主密封件/Main seal | PTFE |
| 型號/Model | 主要外形和連接尺寸/Main form and the connection size (mm) |
| H | L | D0 | D1 | D2 | B |
| DH-10A | 56 | 60 | Ф13 | Ф13 | Ф17 | 4 |
| DH-15A | 62 | 65 | Ф15 | Ф17.08 | Ф21.3 | 5 |
| DH-20A | 71 | 80 | Ф20 | Ф22.48 | Ф26.7 | 5 |
| DH-25A | 78 | 90 | Ф25 | Ф27.86 | Ф33.4 | 5 |
| DH-40A | 99 | 120 | Ф40 | Ф42.76 | Ф48.3 | 5 |
| DH-50A | 112 | 140 | Ф50 | Ф54.76 | Ф60.3 | 5 |
