Electric Propulsion Proportional Flow Control Valve (PFCV)
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Parameter | Performance |
Materials of Construction | Stainless Steel and Vespel |
MEOP / Proof / Burst Pressure | 186 / 279 / 465 bar (2700 / 4050 / 6750 psia) |
Internal Leakage | < 1 x 10-4 sccs GHe over inlet pressure range |
External Leakage | < 1 x 10-6 sccs GHe |
Inlet Pressure Range in Regulation Mode | 2.8 – 186 bar (40 – 2700 psia) |
Outlet Pressure Range in Regulation Mode | 2.28 – 2.55 bar (33 – 37 psia) over inlet pressure range and over 6 – 30 mg/s Xe flow range |
Inlet Pressure Range in Flow Mode | 2.8 -186 bar (40 - 2700 psia) |
Outlet Pressure Range in Flow Mode | 0 – 2.8 bar (0 – 40 psia) over inlet pressure range up to 200 mg/s Xe flow range |
Flow Range | 0 – 30 mg/s Xe typical, >200 mg/s Xenon maximum at 186 bar (2700 psia) inlet pressure |
Input Current Range | 0-140mA maximum sustained (full open) 75mA minimum opening |
Throttle Rate | <25 ms |
Response Time | <10 ms open or closed |
Coil Resistance | 74.5 ± 2 ohms at 21°C (70°F) |
Flow Gain | <2.5 mg/s Xe per mA at 2.8 bar (40 psia) inlet |
Filtration | 25 microns absolute inlet |
Shock | 3000g / 5000 Hz in plane, 6000g / 5000 Hz out of plane |
Random Vibration | 19.2 grms in plane 24.7 grms out of plane |
Thermal | -34 to 100°C (-30 to 212°F) operational -40 to 125°C (-40 to 257°F) non-operational |
Life | 1,000,000 cycles |
Mass | 115 g (0.25 lbm) max |
Heritage | AEHF, BepiColombo, SGEO, TacSat-2, FalconSat-5, 6, GEOStar, Psyche |