VACCO Check and Relief Valves
VACCO Industries
Propulsion check valves and non-propulsive relief valves providing over 40 years of flight-proven overpressure and backflow protection.
Technical specifications
- Configurations
- Single, parallel, series-redundant check valves; single-seat non-propulsive relief valves
- Application
- Bi-propellant and dual-mode propulsion systems
- Flight heritage
- Boeing HS601/HS702, Star-2, FS-1300, DS2000, GPS III, Cygnus, HTV, Solar Dynamics Observatory
- Operating Pressure
- 550 psia
- Operating temperature
- -170° to +45° C
- Lifetime
- 5,000 Poppet Cycles
- Proof Pressure
- 825 psia
- Burst Pressure
- 1,100 psia
- Flow
- .7 grams/second GHe
- Pressure Drop
- 10 psid
- Cracking Pressure
- 7.5 psid
- Reseat Pressure
- 1.0 psid
- External Leakage
- <1 X 10-6 sccs GHee
- Internal Leakage
- 100 scch GHe @ 5 psid
- Non-operating Temperature
- -40° to +45° C
About
For over 40 years VACCO check valves and relief valves have protected system performance on numerous commercial and scientific satellites. Check valves are offered in single, parallel, and series-redundant configurations for bi-propellant and dual-mode propulsion systems. Relief valves are single-seat, non-propulsive designs that have also been integrated with regulators to support human spaceflight. VACCO check valves are standard equipment on leading communications satellite platforms (Boeing HS601/HS702, Orbital Sciences Star-2, Space Systems/Loral FS-1300, Mitsubishi Electric DS2000) and fly on GPS III, NASA’s Solar Dynamics Observatory, the Orbital Sciences/NASA Cygnus resupply vehicle, and Japan’s H-II Transfer Vehicle.
Documentation
Need the full ICD, test reports or a specific revision? Ask the supplier directly.