Part number 12178 is a 6,000 psig, 2-way Solenoid Valve and was designed and qualified for the X-38 Crew Return Vehicle. This pressure balanced poppet valve is capable of bi-directional operation with a flow rate of 1.2 lbm/sec of gaseous nitrogen at 200 psid. Internal leak rates are better than 2.5 sccm in either direction. The filtered inlet and outlet ports are in accordance with MS33649-10. The valve is 6.25 inches tall and about 2.72 inches square.