Airlock Seal System
Replaceable Door Seal and Inspection System
An airlock seal system consists of door seal assemblies engineered with primary elastomeric O-rings and backup Inconel C-seals to maintain atmospheric containment across cryogenic to elevated temperatures. Configured within specialized grooves, the assembly enables robotic inspection and seal replacement without requiring hatch door removal. Maintaining pressure integrity is particularly challenging in the lunar environment because abrasive regolith dust on sealing surfaces serves as the primary degradation mechanism, accelerating long-term wear from solar ultraviolet exposure, radiation, and decades of thermal cycling. Replacement frequency depends on cycling rates and dust contamination, followed by mandatory leak rate testing to verify joint integrity.
Door seal assemblies with provisions for robotic inspection and replacement
Purpose
Door seal assemblies with provisions for robotic inspection and replacement
Context
Child of L2-STR-LOCK
Principles
- ▸Silicone or fluoroelastomer O-rings provide primary sealing at cryogenic to elevated temperatures
- ▸Metal C-seals provide backup sealing if elastomeric seals degrade
- ▸Seal groove design enables robotic seal replacement without door removal
- ▸Leak rate testing after each seal replacement verifies integrity
Typical implementations
- ▸Parker Hannifin space-grade O-ring seal compounds
- ▸Metal C-seal technology for extreme environments
- ▸ISS hatch seal replacement procedures
Lunar considerations
- ▸Lunar dust abrasion on seal surfaces is primary degradation mechanism
- ▸Seal materials degrade from UV, radiation, and thermal cycling over decades
- ▸Seal replacement frequency depends on airlock cycling rate and dust exposure
Specifications
Functional
| primary function | Door seal assemblies with provisions for robotic inspection and replacement |
Physical
| materials | Silicone rubber (S0383-70), Inconel C-seals, PTFE backup rings |
Interfaces
Provides
- Sealing elements for pressure doors
Requires
- Replacement seal materials
Cite this entry
Lunar Ark Codex. "Airlock Seal System" (L3-STR-LOCK-SEAL). Retrieved 10 September 2026, from https://lunarark.com/entry/L3-STR-LOCK-SEAL
Licensed CC-BY-SA 4.0. You may reuse and adapt this entry with attribution, under the same licence.