Classification
Add：No.93 xianle road, zhujing town, jinshan district, Shanghai
This type is special emergency cut-off valve is suitable for low temperature storage tank at low temperature on cut off circulation medium, especially in the event of a fire failure can promptly cut off the medium. Widely used in LNG, ethylene and other low temperature liquid medium, has small volume, light weight, reliable sealing, reliable emergency stop quickly and anti-static characteristics.
Nominal pressure:4.0MPa
Design temperature:-196℃～+70℃
Applicable medium:LNG 、LO2、LN2、LAr
Connection method:插焊
Nominal diameter:25mm~50mm
Strength test pressure：4.0MPa
Air tightness test pressure:1.6MPa
direction of seal test pressure:0.4MPa
Air pressure cylinder:0.4～0.6MPa
Emergency cut-off temperature:+70℃
Emergency cut-off time:<2S
| Main components name | Materials |
| Valve body | ZG0Cr18Ni9 |
| Valve disc | 0Cr18Ni9Ti |
| Valve cover | ZG0Cr18Ni9 |
| Valve stem | 0Cr18Ni9 |
| Main seal | PTFE或PCTFE |
| cylinder | Cast aluminum |
| stents | Cast aluminum |
| Model | Main form and the connection size (mm) | Weight | ||||||||
| H | H1 | D0 | D1 | D | B | W1 | W2 | M | （kg） | |
| DJQ-20P | 189 | 478 | Ф20 | Ф25.5 | Ф100 | 8 | 80 | Ф130 | Rc¼ | 7.2 |
| DJQ-25P | 240 | 530 | Ф25 | Ф32.5 | Ф100 | 8 | 90 | Ф130 | Rc¼ | 7.7 |
| DJQ-32P | 250 | 489 | Ф32 | Ф38.5 | Ф100 | 8 | 105 | Ф130 | Rc¼ | 7.3 |
| DJQ-40P | 227 | 567 | Ф40 | Ф45.5 | Ф125 | 8 | 120 | Ф160 | Rc¼ | 13.2 |
| DJQ-50P | 230 | 570 | Ф50 | Ф57.5 | Ф125 | 10 | 140 | Ф160 | Rc¼ | 14.5 |
