Composite Vessel
Flight-proven composite pressure vessel (18 dm³, 5.8 kg) for pressurant storage and feed in the Phobos Sample Return Mission propulsion system.
Technical specifications
- Purpose
- Storage and feed of pressurant to propellant tanks and operating fluid to cold gas thrusters (Phobos Sample Return Mission return spacecraft)
- Flight qualification
- Letter O — flight use
- Customization
- Can be adapted to customer requirements
- Working medium
- Nitrogen, Air, Helium
- Operating pressure
- Not over 17.6 MPa
- Liner mass
- 1.95 kg
- Vessel mass
- 5.8 kg
- Inner tank volume
- 18 dm³
- Unused working medium residue after expulsion
- Not over 0.65 dm³
- Allowable helium leak (leakage test)
- Not over 1 × 10⁻³ l·μm He/s
- Allowable leak rate (service life)
- Not over 2.33 × 10⁻² l·μm He/s
- Cleanliness
- GOST 17216, Class 5
- Guaranteed service life
- 15 years
- TRL
- 9 (flight-proven)
About
The Composite Vessel is a composite-overwrapped pressure vessel designed to store and feed pressurant (nitrogen, air, helium) to propellant tanks and operating fluid to cold gas thrusters. It was developed for the Phobos Sample Return Mission international program’s return spacecraft propulsion system. The vessel holds 18 dm³ at up to 17.6 MPa operating pressure, with a liner mass of 1.95 kg and a total vessel mass of 5.8 kg. It holds flight qualification status (Letter ‘O’, flight use) and can be adapted to customer requirements, with a 15-year guaranteed service life.
Documentation
No public datasheet yet — request the datasheet / ICD from the supplier.
