Summary

The Rafael Ltd PEPT-330 is a 17.5 litre Positive Expulsion Propellant Tank with EPDM-based rubber diaphragm qualified for ADN-based green propellant.

The spherically shaped tank is compatible with Hydrazine, IPA, de-ionized water, GN2 and GHe and has flight heritage. The pressurant include GN2, GHe and inert gases. The silica-free diaphragm allows for multiple cycles of usage with no limitation to the degree of filling.

The propellant tank is made of made of two thin-walled 6Al-4V titanium alloy hemispheres, cylindrical elongation section (if needed) and a diaphragm integrated to a complete system using peripheral Electron Beam Welding (EBW).

The hot-formed and machined hemispheres are designed to enable the incorporation of integral pressurant and propellant ports.

The space qualified tank features a pedestal mounting. The storage life of the tank is 7 years, and the flight service life is of 15 years.

Key features

  • EPDM-based rubber diaphragm
  • Two thin-walled 6Al-4V titanium alloy hemispheres
  • Cylindrical elongation section (if needed)
  • Qualified for ADN-based green propellant
  • Spherically shaped tank 
  • Compatible with fluid media such as Hydrazine, IPA, de-ionized water, GN2 and GHe
  • Pressurant include GN2, GHe and inert gases
  • Pedestal mounting
  • 7 years storage life
  • 15 years flight service life

Flight heritage

The system has achieved flight heritage with EXOMARS RCS DM.

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

PEPT-330

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Specs

weight
< 3.1 kg
diameter
327 mm (nominal)
volume
17.5 L (nominal)
hydrazine maximal capacity
15.4 kg
propellant type
hydrazine
isopropyl alcohol
de-ionized water
GN2
GHe
operating temperature
4 to 50 C

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