Satellite > Orbit Determination and Control > Propulsion system valve > Propulsion System Fill and Drain Valve (FDV) and Fill and Vent Valve (FVV)
Summary
The Rafael Ltd Propulsion System Fill and Drain valve FDV and Fill and Vent valve – FVV are service valves with 15 years lifetime and flight heritage.
The FDV is used for loading and draining of propellants and FVV is used for pressurizing and venting of Nitrogen. The valves are compatible with Hydrazine, IPa, distilled water, GN2 and GHe.
After launch, the valves do not have any active function. The FDV and FVV are similar by design except for interface thread sizes providing a non-interchangeable propellant and pressure usage connections.
The GSE part executes the loading, draining and pressurizing Ground Support Equipment (GSE) opening the desired valve and disconnecting prior to launch.
Two seals in series are provided for redundancy. The primary metal-to-metal seal is secured by a threaded retainer after loading the propellant/pressurant. The secondary sealing is ensured by a hydrazine resistant O-ring gasket, located within the external cap. At the 1/4'' diameter valve outlet, a Ti welded interface connection is provided.
Key features
- Suitable as service valves
- 15 years lifetime
- Flight heritage
- Compatible with Hydrazine, IPa, distilled water, GN2 and GHe.
- No active function after launch
- Two seals in series are provided for redundancy
Flight heritage
The system has achieved flight heritage with OFEQ, PRISMA (OHB-I).
Manufacturing
Production, testing and inspection facilities:
- Clean rooms (more than 1000 m²)
- Clean Room Component Level
- Clean Room PS-AIT
- Metal Technology Center
- CAD/CAM, CNC machining
- Electro-Erosion
- Forming, hydro-spinning, deep hot and cold-drawing
- Surface treatment, heat treatment
- Welding (EBW, GTAW, GMAW, plasma), brazing
- Cutting, bending and flaring of titanium tubes
- Hot Firing test facility which includes 5 Firing Chambers
- Chambers for 1÷10 N class thrusters
- Chamber for high-trust thrusters and/or system tests
- Chamber for Hall effect thruster & EP system firing
- Ground support equipment for testing components and systems
- GSE propulsion systems electrical tester
Testing & qualification
Rafael Quality system is certified to ISO 9001:2015/AS9100D. The quality policy of Rafael is derived from the common space quality standards, especially from ESA. Rafael ensures 100% inspection on the space products from the raw materials used to final integration. ERP integrated quality system enables full traceability from raw material to the delivered item.
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Last updated: 2024-02-05
Propulsion System Fill and Drain Valve (FDV) and Fill and Vent Valve (FVV)
Specs
distilled water
isopropyl alcohol
GN2
GHe
Export