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classification
add：no.93 xianle road, zhujing town, jinshan district, shanghai
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.
nominal pressure:4.0mpa
design temperature:-196℃～ 80℃
applicable medium:lng 、lo2、ln2、lar
connection method:butt welding
| main components name | materials |
| valve body | zg0cr18ni9 |
| valve disc | 0cr18ni9ti |
| main seal | ptfe |
| model | 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 |