Xenon Flow Controller (XFC)

The 50-1412 high pressure Xenon Flow Controller (XFC) is a fully welded stainless steel assembly consisting of three components (Flow Control Valve – FCV, Proportional Flow Control Valve – PFCV, Latch Valve – LV) and three orifices mounted to a flight plate. The XFC provides propellant isolation and proportional flow control to an EP thruster, and is capable of 2 different anode to cathode flow split ratios to optimize different operating conditions.

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Characteristic Performance / Interfaces
Materials of Construction Stainless Steel, Aluminum flight plate
Operating Pressure / MEOP 2.4-2.8 / 3.45 bar (35-40 / 50 psia); 186 bar (2700 psia) capable
Proof Pressure 10.3 bar (150 psia); 279 bar (4050 psia) capable
Burst Pressure 13.8 bar (200 psia); 465 bar (6750 psia) capable
External Leakage < 1e-6 scc/s, GHe @ MEOP
Supply Voltage 28 Vdc opening, 10 Vdc holding – FCV, 28 Vdc – LV, 6-11 Vdc – PFCV
Internal Leakage < 8.3e-4 scc/s GHe @ MEOP 
Flow  3 – 23 mg/sec GXe.
Flow Split Ratio C:A = 5% (LV closed) or 9% (LV open) anode and cathode flow split ratios can be altered with orifice modifications as required to meet specific requirements.
Fluids  GXe, GAr, GHe, GN2
Temperature Range(s) Operating: -34 to 110°C (-29 to 230°F) Non-Operating: -34 to 110°C (-29 to 230°F)
Filtration

25 micron absolute FCV and PFCV

7 micron absolute LV

Sine Vibration Up to 13g
Random Vibration 19.2 grms in plane, 24.2 grms out of plane
Shock Up to 2600g @ 1100 Hz 
Mass < 2.2 lbm (<974 g)
Heritage AEHF, Psyche, PPE, D2S2