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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Low leakage rate, large diameter vent and relief valve operates satisfactorily over a large temperature range by a design that accommodates waviness and distortions due to thermal gradients. It is based on a fixed sealing member having an inclined lapped surface to which a flexible flow gate conforms.
Hydraulic valve absorbs impact energy generated in docking or joining of two large bodies by controlling energy release to avoid jarring shock. The area of exit porting presented to the hydraulic control fluid is directly proportional to the pressure acting on the fluid.
Pressure relief valve vents at a slow bleed rate at one pressure level and at a higher bleed rate at a higher pressure level. The value housing contains a sleeve, inlet port, outlet port, an orifice, a ball and seat arrangement, and a belleville spring diaphragm.
Effects of strain rate, temperature, crystallinity, and surface finish /smoothness/ on the tensile strength of a commercial chlorotrifluorethylene plastic /CTFE/ used for lipseals in very fast-acting liquid oxygen valves.
Design specifications for two way breathing valve acceptable for aerospace medical experiments
Leakage through propellant valves into injector flow passages and combustion chambers in vacuum
Adverse effects of liquid propellant leakage past control valves in vacuum environment
Performance tests on bipropellant and quadredundant propellant valves for rocket engines
Vibration, shock, and acceptance test data for C-1 rocket engine propellant valve qualification
Specifications, design concepts, and qualification test procedures for C-1 engine bipropellant valve
Performance of propellant valve actuating system for lunar excursion module descent and ascent engines in vacuum environment
Performance test data for dual ball shutoff valve
Vortex valve for hot gas flow modulation in secondary injection thrust vector control system
Performance of vortex valve controlled secondary injection thrust vector system for solid propellant rocket motor control
Roentgen video densitometer study of mitral valve closure during fibrilation, discussing atrial contraction role on ventricular function in normal and failing heart
Initiating combustion of altitude control rocket engines in a precombustion chamber of ductile material reduces high pressure surges generated by hypergolic propellants. Two-step bipropellant valve concepts control initial propellant flow into precombustion chamber and subsequent full flow into main chamber.
Performance tests on modified manual gas valve
Environmental tests of manual globe valves for high pressure helium storage tanks