Engineering Papers⌕ Search

SEARCH · Engineering Papers

Results for “VALVES”

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.

Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.

At least 1,027 records · Page 57
All sourcesNASA NTRSDOE OSTI
NASA NTRS1967

Dynamic valve seal is reliable at cryogenic temperatures

C-shaped PTFE /polytetrafluorethylene/ seal ring provides a reliable seal in cryogenic fluids over a fluid pressure range of 0 to 2000 psig. It is interference-fitted internally with a metal expander ring and a metal compressor ring.

Moxley, H. E.↗
NASA NTRS1970

Hydraulic brake safety valve

Safety device, consisting of three separate fluid chambers, insures that two wheels of a brake system continue to function if a failure occurs.

Hobson, Z. A.↗
NASA NTRS1965

Injector-valve device Patent

Apparatus for cooling and injecting hypergolic propellants into combustion chamber of small rocket engine

Stein, S.↗
NASA NTRS1972

Hermetic isolation valves

Mechanism consists of thermal actuator, which expands when flow is desired, forcing cutter poppet through a diaphragm seal. Design concept is useful in systems that are stored for long periods of time before operation.

Makowski, M. J.↗
NASA NTRS1971

Effect of varying ventricular function by extrasystolic potentiation on closure of the mitral valve.

Mitral regurgitant indexes were measured by roentgen videodensitometry in anesthetized dogs without thoracotomy before, during and after extrasystolic potentiation of ventricular contraction while the atria and ventricles were driven in normal temporal sequence simultaneously or in such a way as to induce atrial fibrillation. Small amounts of mitral reflux were observed with simultaneous atrial and ventricular driving and with atrial fibrillation in the control measurements before initiation of extrasystolic potentiation. Reflux became negligible during extrasystolic potentiation and increased beyond control levels after termination of extrasystolic potentiation.

Vandenberg, R. A.↗