L3-DST-SEAL-HERM
CRITICAL
ENVIRONMENTAL
Level 3 · hardware
Hermetic Seals
Metal-Bellows / Metal-O-Ring Hermetic Seal Library
Library of hermetic seal designs (metal bellows, metal O-rings, Conflat flanges) providing complete vacuum/dust isolation between Ark internal volumes and lunar environment.
Purpose
Library of hermetic seal designs (metal bellows, metal O-rings, Conflat flanges) providing complete vacuum/dust isolation between Ark internal volumes and lunar environment.
Context
Child of L2-DST-SEAL within the Lunar Ark system
Principles
- ▸Metal bellows accommodate motion without leakage
- ▸Helicoflex / Conflat metal seals for static joints
- ▸Leak rate <10^-9 atm-cc/s achievable
- ▸No elastomer to degrade over century
- ▸Standardised flange sizes for L1-MNT swap
Typical implementations
- ▸Industrial UHV (ultra-high vacuum) seal heritage
- ▸Aerospace fuel tank seal designs
- ▸Apollo / Shuttle hermetic seals
Lunar considerations
- ▸100-year mission needs elastomer-free seals
- ▸Conflat-style proven over decades in industrial UHV
- ▸Replacement via L1-MNT
Specifications
Functional
| primary function | Library of hermetic seal designs (metal bellows, metal O-rings, Conflat flanges) providing complete vacuum/dust isolation between Ark internal volumes and lunar environment. |
| leak rate atm cc per s | 1e-09 |
Physical
| mass kg | 10 |
| materials | Cu Conflat gaskets, 316L SS bellows, Helicoflex C-rings |
| vacuum compatibility | True |
Operational
| power consumption w | 0 |
| thermal range c | -40, 70 |
| lifetime years | 100 |
| mtbf hours | 1000000 |
Interfaces
Provides
- Cryo vault hermetic isolation
- Habitat pressure boundary
Requires
- Flange mounting interfaces
Cite this entry
Lunar Ark Codex. "Hermetic Seals" (L3-DST-SEAL-HERM). Retrieved 10 September 2026, from https://lunarark.com/entry/L3-DST-SEAL-HERM
Licensed CC-BY-SA 4.0. You may reuse and adapt this entry with attribution, under the same licence.