Carbon steel inner safety valve is mainly used as safety device for liquefied gas tank truck or liquefied gas storage tank. When medium pressure exceeds permitted value, the valve opens automatically to discharge. When pressure is decreased to permitted value, the valve closes automatically to protect equipment.
Parameter
Nominal pressure PN | 1.8 | 2.2 | MPa |
Shell test pressure PN | 2.7 | 3.3 | |
Seal test pressure PN | 1.8 | 2.2 | |
Opened pressure | ≤1.98 | ≤2.42 | |
Full open pressure | ≤2.16 | ≤2.64 | |
Back seat pressure | 1.44 | 1.76 | |
Applicable medium | Liquefied gas, nitrogen, liquid ammonia | ||
Applicable temperature | -40~+80 ℃ | ||
Materials
Part Name | Materials |
Disc | Carbon steel |
Seal ring | PTFE |
Body | Carbon steel |
Stem | 1Cr18Ni9Ti |
Base | Carbon steel |
Yoke | Carbon steel |
Dimensions
Nominal Diameter DN(mm) | Dimension(mm) | ||||||||
L | D | D1 | D2 | D0 | b | f | Z-Φd | H ≈ | |
50 | 95 | 160 | 125 | 100 | 34 | 20 | 3 | 4-18 | 376 |
80 | 99 | 225 | 190 | 149 | 52 | 25 | 4.5 | 8-22 | 512 |
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