Bang Bang Regulator

rolling diaphragm tank

The Moog 51E343 bang-bang regulator is a normally closed, dual seat, series redundant solenoid valve. When electrically commanded the valve will open allowing the flow of propellant. Continuous voltage is required to maintain the valve in the open condition. There are two coils per assembly, one for actuating each seat. Each valve can be operated independently.

 

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Materials of Construction

Stainless Steel, Vespel
MEOP / Proof / Burst Pressure

120 / 180 / 240 bar (1740 / 2610 / 3480 psia)

Operating Voltage

24 – 34 Vdc pulse, 4.0 ± 0.1 Vdc holding voltage
Drop Out

3.75 Vdc max at 120 bar (1740 psia) inlet and 50oC (122oF)

Coil Resistance 74.5 ohms nominal at 200C (680F) each coil
Insulation Resistance >1 Mohm at 500Vdc, 60 sec, all leads to body

Response

< 10 ms
Minimum Actuation Voltage < 20 ms
Internal Leakage < 1.0 x 10-3 scc/sec per seat

External Leakage

< 1.0 x 10-6 sccs GHe at MEOP
Cycle Life

1,000,000 per seat

Mass 220 g max
Random Vibration

22.4 grms overall X axis – in plane

18.8 grms overall Y axis – out of plane

23.9 grms overall Z axis – axial

Thermal Cycle

-20 to 70oC (-4 to 158oF) non-operational

-20 to 60oC (-4 to 140oF) operational

Other Flying leads
Heritage DS-1, SMART-1, DAWN, Rapid Eye, Hayabusa-2, Small GEO